1 /* Simulator for Analog Devices Blackfin processors.
2
3 Copyright (C) 2005-2011 Free Software Foundation, Inc.
4 Contributed by Analog Devices, Inc.
5
6 This file is part of simulators.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20
21 #include "config.h"
22
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <inttypes.h>
27
28 #include "opcode/bfin.h"
29 #include "sim-main.h"
30 #include "dv-bfin_cec.h"
31 #include "dv-bfin_mmu.h"
32
33 #define HOST_LONG_WORD_SIZE (sizeof (long) * 8)
34
35 #define SIGNEXTEND(v, n) \
36 (((bs32)(v) << (HOST_LONG_WORD_SIZE - (n))) >> (HOST_LONG_WORD_SIZE - (n)))
37
38 static __attribute__ ((noreturn)) void
illegal_instruction(SIM_CPU * cpu)39 illegal_instruction (SIM_CPU *cpu)
40 {
41 TRACE_INSN (cpu, "ILLEGAL INSTRUCTION");
42 while (1)
43 cec_exception (cpu, VEC_UNDEF_I);
44 }
45
46 static __attribute__ ((noreturn)) void
illegal_instruction_combination(SIM_CPU * cpu)47 illegal_instruction_combination (SIM_CPU *cpu)
48 {
49 TRACE_INSN (cpu, "ILLEGAL INSTRUCTION COMBINATION");
50 while (1)
51 cec_exception (cpu, VEC_ILGAL_I);
52 }
53
54 static __attribute__ ((noreturn)) void
unhandled_instruction(SIM_CPU * cpu,const char * insn)55 unhandled_instruction (SIM_CPU *cpu, const char *insn)
56 {
57 SIM_DESC sd = CPU_STATE (cpu);
58 bu16 iw0, iw1;
59 bu32 iw2;
60
61 TRACE_EVENTS (cpu, "unhandled instruction");
62
63 iw0 = IFETCH (PCREG);
64 iw1 = IFETCH (PCREG + 2);
65 iw2 = ((bu32)iw0 << 16) | iw1;
66
67 sim_io_eprintf (sd, "Unhandled instruction at 0x%08x (%s opcode 0x", PCREG, insn);
68 if ((iw0 & 0xc000) == 0xc000)
69 sim_io_eprintf (sd, "%08x", iw2);
70 else
71 sim_io_eprintf (sd, "%04x", iw0);
72
73 sim_io_eprintf (sd, ") ... aborting\n");
74
75 illegal_instruction (cpu);
76 }
77
78 static const char * const astat_names[] =
79 {
80 [ 0] = "AZ",
81 [ 1] = "AN",
82 [ 2] = "AC0_COPY",
83 [ 3] = "V_COPY",
84 [ 4] = "ASTAT_4",
85 [ 5] = "CC",
86 [ 6] = "AQ",
87 [ 7] = "ASTAT_7",
88 [ 8] = "RND_MOD",
89 [ 9] = "ASTAT_9",
90 [10] = "ASTAT_10",
91 [11] = "ASTAT_11",
92 [12] = "AC0",
93 [13] = "AC1",
94 [14] = "ASTAT_14",
95 [15] = "ASTAT_15",
96 [16] = "AV0",
97 [17] = "AV0S",
98 [18] = "AV1",
99 [19] = "AV1S",
100 [20] = "ASTAT_20",
101 [21] = "ASTAT_21",
102 [22] = "ASTAT_22",
103 [23] = "ASTAT_23",
104 [24] = "V",
105 [25] = "VS",
106 [26] = "ASTAT_26",
107 [27] = "ASTAT_27",
108 [28] = "ASTAT_28",
109 [29] = "ASTAT_29",
110 [30] = "ASTAT_30",
111 [31] = "ASTAT_31",
112 };
113
114 typedef enum
115 {
116 c_0, c_1, c_4, c_2, c_uimm2, c_uimm3, c_imm3, c_pcrel4,
117 c_imm4, c_uimm4s4, c_uimm4s4d, c_uimm4, c_uimm4s2, c_negimm5s4, c_imm5,
118 c_imm5d, c_uimm5, c_imm6, c_imm7, c_imm7d, c_imm8, c_uimm8, c_pcrel8,
119 c_uimm8s4, c_pcrel8s4, c_lppcrel10, c_pcrel10, c_pcrel12, c_imm16s4,
120 c_luimm16, c_imm16, c_imm16d, c_huimm16, c_rimm16, c_imm16s2, c_uimm16s4,
121 c_uimm16s4d, c_uimm16, c_pcrel24, c_uimm32, c_imm32, c_huimm32, c_huimm32e,
122 } const_forms_t;
123
124 static const struct
125 {
126 const char *name;
127 const int nbits;
128 const char reloc;
129 const char issigned;
130 const char pcrel;
131 const char scale;
132 const char offset;
133 const char negative;
134 const char positive;
135 const char decimal;
136 const char leading;
137 const char exact;
138 } constant_formats[] =
139 {
140 { "0", 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0},
141 { "1", 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0},
142 { "4", 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0},
143 { "2", 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0},
144 { "uimm2", 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
145 { "uimm3", 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
146 { "imm3", 3, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0},
147 { "pcrel4", 4, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0},
148 { "imm4", 4, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0},
149 { "uimm4s4", 4, 0, 0, 0, 2, 0, 0, 1, 0, 0, 0},
150 { "uimm4s4d", 4, 0, 0, 0, 2, 0, 0, 1, 1, 0, 0},
151 { "uimm4", 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
152 { "uimm4s2", 4, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0},
153 { "negimm5s4", 5, 0, 1, 0, 2, 0, 1, 0, 0, 0, 0},
154 { "imm5", 5, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0},
155 { "imm5d", 5, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0},
156 { "uimm5", 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
157 { "imm6", 6, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0},
158 { "imm7", 7, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0},
159 { "imm7d", 7, 0, 1, 0, 0, 0, 0, 0, 1, 3, 0},
160 { "imm8", 8, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0},
161 { "uimm8", 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
162 { "pcrel8", 8, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0},
163 { "uimm8s4", 8, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0},
164 { "pcrel8s4", 8, 1, 1, 1, 2, 0, 0, 0, 0, 0, 0},
165 { "lppcrel10", 10, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0},
166 { "pcrel10", 10, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0},
167 { "pcrel12", 12, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0},
168 { "imm16s4", 16, 0, 1, 0, 2, 0, 0, 0, 0, 0, 0},
169 { "luimm16", 16, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0},
170 { "imm16", 16, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0},
171 { "imm16d", 16, 0, 1, 0, 0, 0, 0, 0, 1, 3, 0},
172 { "huimm16", 16, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0},
173 { "rimm16", 16, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0},
174 { "imm16s2", 16, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0},
175 { "uimm16s4", 16, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0},
176 { "uimm16s4d", 16, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0},
177 { "uimm16", 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
178 { "pcrel24", 24, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0},
179 { "uimm32", 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
180 { "imm32", 32, 0, 1, 0, 0, 0, 0, 0, 1, 3, 0},
181 { "huimm32", 32, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0},
182 { "huimm32e", 32, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1},
183 };
184
185 static const char *
fmtconst_str(const_forms_t cf,bs32 x,bu32 pc)186 fmtconst_str (const_forms_t cf, bs32 x, bu32 pc)
187 {
188 static char buf[60];
189
190 if (constant_formats[cf].reloc)
191 {
192 bu32 ea = (((constant_formats[cf].pcrel ? SIGNEXTEND (x, constant_formats[cf].nbits)
193 : x) + constant_formats[cf].offset) << constant_formats[cf].scale);
194 if (constant_formats[cf].pcrel)
195 ea += pc;
196 /*if (outf->symbol_at_address_func (ea, outf) || !constant_formats[cf].exact)
197 {
198 outf->print_address_func (ea, outf);
199 return "";
200 }
201 else*/
202 {
203 sprintf (buf, "%#x", x);
204 return buf;
205 }
206 }
207
208 /* Negative constants have an implied sign bit. */
209 if (constant_formats[cf].negative)
210 {
211 int nb = constant_formats[cf].nbits + 1;
212
213 x = x | (1 << constant_formats[cf].nbits);
214 x = SIGNEXTEND (x, nb);
215 }
216 else
217 x = constant_formats[cf].issigned ? SIGNEXTEND (x, constant_formats[cf].nbits) : x;
218
219 if (constant_formats[cf].offset)
220 x += constant_formats[cf].offset;
221
222 if (constant_formats[cf].scale)
223 x <<= constant_formats[cf].scale;
224
225 if (constant_formats[cf].decimal)
226 {
227 if (constant_formats[cf].leading)
228 {
229 char ps[10];
230 sprintf (ps, "%%%ii", constant_formats[cf].leading);
231 sprintf (buf, ps, x);
232 }
233 else
234 sprintf (buf, "%i", x);
235 }
236 else
237 {
238 if (constant_formats[cf].issigned && x < 0)
239 sprintf (buf, "-0x%x", abs (x));
240 else
241 sprintf (buf, "0x%x", x);
242 }
243
244 return buf;
245 }
246
247 static bu32
fmtconst_val(const_forms_t cf,bu32 x,bu32 pc)248 fmtconst_val (const_forms_t cf, bu32 x, bu32 pc)
249 {
250 if (0 && constant_formats[cf].reloc)
251 {
252 bu32 ea = (((constant_formats[cf].pcrel
253 ? (bu32)SIGNEXTEND (x, constant_formats[cf].nbits)
254 : x) + constant_formats[cf].offset)
255 << constant_formats[cf].scale);
256 if (constant_formats[cf].pcrel)
257 ea += pc;
258
259 return ea;
260 }
261
262 /* Negative constants have an implied sign bit. */
263 if (constant_formats[cf].negative)
264 {
265 int nb = constant_formats[cf].nbits + 1;
266 x = x | (1 << constant_formats[cf].nbits);
267 x = SIGNEXTEND (x, nb);
268 }
269 else if (constant_formats[cf].issigned)
270 x = SIGNEXTEND (x, constant_formats[cf].nbits);
271
272 x += constant_formats[cf].offset;
273 x <<= constant_formats[cf].scale;
274
275 return x;
276 }
277
278 #define uimm16s4(x) fmtconst_val (c_uimm16s4, x, 0)
279 #define uimm16s4_str(x) fmtconst_str (c_uimm16s4, x, 0)
280 #define uimm16s4d(x) fmtconst_val (c_uimm16s4d, x, 0)
281 #define pcrel4(x) fmtconst_val (c_pcrel4, x, pc)
282 #define pcrel8(x) fmtconst_val (c_pcrel8, x, pc)
283 #define pcrel8s4(x) fmtconst_val (c_pcrel8s4, x, pc)
284 #define pcrel10(x) fmtconst_val (c_pcrel10, x, pc)
285 #define pcrel12(x) fmtconst_val (c_pcrel12, x, pc)
286 #define negimm5s4(x) fmtconst_val (c_negimm5s4, x, 0)
287 #define negimm5s4_str(x) fmtconst_str (c_negimm5s4, x, 0)
288 #define rimm16(x) fmtconst_val (c_rimm16, x, 0)
289 #define huimm16(x) fmtconst_val (c_huimm16, x, 0)
290 #define imm16(x) fmtconst_val (c_imm16, x, 0)
291 #define imm16_str(x) fmtconst_str (c_imm16, x, 0)
292 #define imm16d(x) fmtconst_val (c_imm16d, x, 0)
293 #define uimm2(x) fmtconst_val (c_uimm2, x, 0)
294 #define uimm3(x) fmtconst_val (c_uimm3, x, 0)
295 #define uimm3_str(x) fmtconst_str (c_uimm3, x, 0)
296 #define luimm16(x) fmtconst_val (c_luimm16, x, 0)
297 #define luimm16_str(x) fmtconst_str (c_luimm16, x, 0)
298 #define uimm4(x) fmtconst_val (c_uimm4, x, 0)
299 #define uimm4_str(x) fmtconst_str (c_uimm4, x, 0)
300 #define uimm5(x) fmtconst_val (c_uimm5, x, 0)
301 #define uimm5_str(x) fmtconst_str (c_uimm5, x, 0)
302 #define imm16s2(x) fmtconst_val (c_imm16s2, x, 0)
303 #define imm16s2_str(x) fmtconst_str (c_imm16s2, x, 0)
304 #define uimm8(x) fmtconst_val (c_uimm8, x, 0)
305 #define imm16s4(x) fmtconst_val (c_imm16s4, x, 0)
306 #define imm16s4_str(x) fmtconst_str (c_imm16s4, x, 0)
307 #define uimm4s2(x) fmtconst_val (c_uimm4s2, x, 0)
308 #define uimm4s2_str(x) fmtconst_str (c_uimm4s2, x, 0)
309 #define uimm4s4(x) fmtconst_val (c_uimm4s4, x, 0)
310 #define uimm4s4_str(x) fmtconst_str (c_uimm4s4, x, 0)
311 #define uimm4s4d(x) fmtconst_val (c_uimm4s4d, x, 0)
312 #define lppcrel10(x) fmtconst_val (c_lppcrel10, x, pc)
313 #define imm3(x) fmtconst_val (c_imm3, x, 0)
314 #define imm3_str(x) fmtconst_str (c_imm3, x, 0)
315 #define imm4(x) fmtconst_val (c_imm4, x, 0)
316 #define uimm8s4(x) fmtconst_val (c_uimm8s4, x, 0)
317 #define imm5(x) fmtconst_val (c_imm5, x, 0)
318 #define imm5d(x) fmtconst_val (c_imm5d, x, 0)
319 #define imm6(x) fmtconst_val (c_imm6, x, 0)
320 #define imm7(x) fmtconst_val (c_imm7, x, 0)
321 #define imm7_str(x) fmtconst_str (c_imm7, x, 0)
322 #define imm7d(x) fmtconst_val (c_imm7d, x, 0)
323 #define imm8(x) fmtconst_val (c_imm8, x, 0)
324 #define pcrel24(x) fmtconst_val (c_pcrel24, x, pc)
325 #define pcrel24_str(x) fmtconst_str (c_pcrel24, x, pc)
326 #define uimm16(x) fmtconst_val (c_uimm16, x, 0)
327 #define uimm32(x) fmtconst_val (c_uimm32, x, 0)
328 #define imm32(x) fmtconst_val (c_imm32, x, 0)
329 #define huimm32(x) fmtconst_val (c_huimm32, x, 0)
330 #define huimm32e(x) fmtconst_val (c_huimm32e, x, 0)
331
332 /* Table C-4. Core Register Encoding Map. */
333 const char * const greg_names[] =
334 {
335 "R0", "R1", "R2", "R3", "R4", "R5", "R6", "R7",
336 "P0", "P1", "P2", "P3", "P4", "P5", "SP", "FP",
337 "I0", "I1", "I2", "I3", "M0", "M1", "M2", "M3",
338 "B0", "B1", "B2", "B3", "L0", "L1", "L2", "L3",
339 "A0.X", "A0.W", "A1.X", "A1.W", "<res>", "<res>", "ASTAT", "RETS",
340 "<res>", "<res>", "<res>", "<res>", "<res>", "<res>", "<res>", "<res>",
341 "LC0", "LT0", "LB0", "LC1", "LT1", "LB1", "CYCLES", "CYCLES2",
342 "USP", "SEQSTAT", "SYSCFG", "RETI", "RETX", "RETN", "RETE", "EMUDAT",
343 };
344 static const char *
get_allreg_name(int grp,int reg)345 get_allreg_name (int grp, int reg)
346 {
347 return greg_names[(grp << 3) | reg];
348 }
349 static const char *
get_preg_name(int reg)350 get_preg_name (int reg)
351 {
352 return get_allreg_name (1, reg);
353 }
354
355 static bool
reg_is_reserved(int grp,int reg)356 reg_is_reserved (int grp, int reg)
357 {
358 return (grp == 4 && (reg == 4 || reg == 5)) || (grp == 5);
359 }
360
361 static bu32 *
get_allreg(SIM_CPU * cpu,int grp,int reg)362 get_allreg (SIM_CPU *cpu, int grp, int reg)
363 {
364 int fullreg = (grp << 3) | reg;
365 /* REG_R0, REG_R1, REG_R2, REG_R3, REG_R4, REG_R5, REG_R6, REG_R7,
366 REG_P0, REG_P1, REG_P2, REG_P3, REG_P4, REG_P5, REG_SP, REG_FP,
367 REG_I0, REG_I1, REG_I2, REG_I3, REG_M0, REG_M1, REG_M2, REG_M3,
368 REG_B0, REG_B1, REG_B2, REG_B3, REG_L0, REG_L1, REG_L2, REG_L3,
369 REG_A0x, REG_A0w, REG_A1x, REG_A1w, , , REG_ASTAT, REG_RETS,
370 , , , , , , , ,
371 REG_LC0, REG_LT0, REG_LB0, REG_LC1, REG_LT1, REG_LB1, REG_CYCLES,
372 REG_CYCLES2,
373 REG_USP, REG_SEQSTAT, REG_SYSCFG, REG_RETI, REG_RETX, REG_RETN, REG_RETE,
374 REG_LASTREG */
375 switch (fullreg >> 2)
376 {
377 case 0: case 1: return &DREG (reg);
378 case 2: case 3: return &PREG (reg);
379 case 4: return &IREG (reg & 3);
380 case 5: return &MREG (reg & 3);
381 case 6: return &BREG (reg & 3);
382 case 7: return &LREG (reg & 3);
383 default:
384 switch (fullreg)
385 {
386 case 32: return &AXREG (0);
387 case 33: return &AWREG (0);
388 case 34: return &AXREG (1);
389 case 35: return &AWREG (1);
390 case 39: return &RETSREG;
391 case 48: return &LCREG (0);
392 case 49: return <REG (0);
393 case 50: return &LBREG (0);
394 case 51: return &LCREG (1);
395 case 52: return <REG (1);
396 case 53: return &LBREG (1);
397 case 54: return &CYCLESREG;
398 case 55: return &CYCLES2REG;
399 case 56: return &USPREG;
400 case 57: return &SEQSTATREG;
401 case 58: return &SYSCFGREG;
402 case 59: return &RETIREG;
403 case 60: return &RETXREG;
404 case 61: return &RETNREG;
405 case 62: return &RETEREG;
406 case 63: return &EMUDAT_INREG;
407 }
408 illegal_instruction (cpu);
409 }
410 }
411
412 static const char *
amod0(int s0,int x0)413 amod0 (int s0, int x0)
414 {
415 static const char * const mod0[] = {
416 "", " (S)", " (CO)", " (SCO)",
417 };
418 int i = s0 + (x0 << 1);
419
420 if (i < ARRAY_SIZE (mod0))
421 return mod0[i];
422 else
423 return "";
424 }
425
426 static const char *
amod0amod2(int s0,int x0,int aop0)427 amod0amod2 (int s0, int x0, int aop0)
428 {
429 static const char * const mod02[] = {
430 "", " (S)", " (CO)", " (SCO)",
431 "", "", "", "",
432 " (ASR)", " (S, ASR)", " (CO, ASR)", " (SCO, ASR)",
433 " (ASL)", " (S, ASL)", " (CO, ASL)", " (SCO, ASL)",
434 };
435 int i = s0 + (x0 << 1) + (aop0 << 2);
436
437 if (i < ARRAY_SIZE (mod02))
438 return mod02[i];
439 else
440 return "";
441 }
442
443 static const char *
amod1(int s0,int x0)444 amod1 (int s0, int x0)
445 {
446 static const char * const mod1[] = {
447 " (NS)", " (S)",
448 };
449 int i = s0 + (x0 << 1);
450
451 if (i < ARRAY_SIZE (mod1))
452 return mod1[i];
453 else
454 return "";
455 }
456
457 static const char *
mac_optmode(int mmod,int MM)458 mac_optmode (int mmod, int MM)
459 {
460 static const char * const omode[] = {
461 [(M_S2RND << 1) + 0] = " (S2RND)",
462 [(M_T << 1) + 0] = " (T)",
463 [(M_W32 << 1) + 0] = " (W32)",
464 [(M_FU << 1) + 0] = " (FU)",
465 [(M_TFU << 1) + 0] = " (TFU)",
466 [(M_IS << 1) + 0] = " (IS)",
467 [(M_ISS2 << 1) + 0] = " (ISS2)",
468 [(M_IH << 1) + 0] = " (IH)",
469 [(M_IU << 1) + 0] = " (IU)",
470 [(M_S2RND << 1) + 1] = " (M, S2RND)",
471 [(M_T << 1) + 1] = " (M, T)",
472 [(M_W32 << 1) + 1] = " (M, W32)",
473 [(M_FU << 1) + 1] = " (M, FU)",
474 [(M_TFU << 1) + 1] = " (M, TFU)",
475 [(M_IS << 1) + 1] = " (M, IS)",
476 [(M_ISS2 << 1) + 1] = " (M, ISS2)",
477 [(M_IH << 1) + 1] = " (M, IH)",
478 [(M_IU << 1) + 1] = " (M, IU)",
479 };
480 int i = MM + (mmod << 1);
481
482 if (i < ARRAY_SIZE (omode) && omode[i])
483 return omode[i];
484 else
485 return "";
486 }
487
488 static const char *
get_store_name(SIM_CPU * cpu,bu32 * p)489 get_store_name (SIM_CPU *cpu, bu32 *p)
490 {
491 if (p >= &DREG (0) && p <= &CYCLESREG)
492 return greg_names[p - &DREG (0)];
493 else if (p == &AXREG (0))
494 return greg_names[4 * 8 + 0];
495 else if (p == &AWREG (0))
496 return greg_names[4 * 8 + 1];
497 else if (p == &AXREG (1))
498 return greg_names[4 * 8 + 2];
499 else if (p == &AWREG (1))
500 return greg_names[4 * 8 + 3];
501 else if (p == &ASTATREG (av0))
502 return "ASTAT[av0]";
503 else if (p == &ASTATREG (av0s))
504 return "ASTAT[av0s]";
505 else if (p == &ASTATREG (av1))
506 return "ASTAT[av1]";
507 else if (p == &ASTATREG (av1s))
508 return "ASTAT[av1s]";
509 else if (p == &ASTATREG (v))
510 return "ASTAT[v]";
511 else if (p == &ASTATREG (vs))
512 return "ASTAT[vs]";
513 else if (p == &ASTATREG (v_copy))
514 return "ASTAT[v_copy]";
515 else if (p == &ASTATREG (az))
516 return "ASTAT[az]";
517 else if (p == &ASTATREG (an))
518 return "ASTAT[an]";
519 else if (p == &ASTATREG (az))
520 return "ASTAT[az]";
521 else if (p == &ASTATREG (ac0))
522 return "ASTAT[ac0]";
523 else if (p == &ASTATREG (ac0_copy))
524 return "ASTAT[ac0_copy]";
525 else
526 {
527 /* Worry about this when we start to STORE() it. */
528 sim_io_eprintf (CPU_STATE (cpu), "STORE(): unknown register\n");
529 abort ();
530 }
531 }
532
533 static void
queue_store(SIM_CPU * cpu,bu32 * addr,bu32 val)534 queue_store (SIM_CPU *cpu, bu32 *addr, bu32 val)
535 {
536 struct store *s = &BFIN_CPU_STATE.stores[BFIN_CPU_STATE.n_stores];
537 s->addr = addr;
538 s->val = val;
539 TRACE_REGISTER (cpu, "queuing write %s = %#x",
540 get_store_name (cpu, addr), val);
541 ++BFIN_CPU_STATE.n_stores;
542 }
543 #define STORE(X, Y) \
544 do { \
545 if (BFIN_CPU_STATE.n_stores == 20) abort (); \
546 queue_store (cpu, &(X), (Y)); \
547 } while (0)
548
549 static void
setflags_nz(SIM_CPU * cpu,bu32 val)550 setflags_nz (SIM_CPU *cpu, bu32 val)
551 {
552 SET_ASTATREG (az, val == 0);
553 SET_ASTATREG (an, val >> 31);
554 }
555
556 static void
setflags_nz_2x16(SIM_CPU * cpu,bu32 val)557 setflags_nz_2x16 (SIM_CPU *cpu, bu32 val)
558 {
559 SET_ASTATREG (an, (bs16)val < 0 || (bs16)(val >> 16) < 0);
560 SET_ASTATREG (az, (bs16)val == 0 || (bs16)(val >> 16) == 0);
561 }
562
563 static void
setflags_logical(SIM_CPU * cpu,bu32 val)564 setflags_logical (SIM_CPU *cpu, bu32 val)
565 {
566 setflags_nz (cpu, val);
567 SET_ASTATREG (ac0, 0);
568 SET_ASTATREG (v, 0);
569 }
570
571 static bu32
add_brev(bu32 addend1,bu32 addend2)572 add_brev (bu32 addend1, bu32 addend2)
573 {
574 bu32 mask, b, r;
575 int i, cy;
576
577 mask = 0x80000000;
578 r = 0;
579 cy = 0;
580
581 for (i = 31; i >= 0; --i)
582 {
583 b = ((addend1 & mask) >> i) + ((addend2 & mask) >> i);
584 b += cy;
585 cy = b >> 1;
586 b &= 1;
587 r |= b << i;
588 mask >>= 1;
589 }
590
591 return r;
592 }
593
594 /* This is a bit crazy, but we want to simulate the hardware behavior exactly
595 rather than worry about the circular buffers being used correctly. Which
596 isn't to say there isn't room for improvement here, just that we want to
597 be conservative. See also dagsub(). */
598 static bu32
dagadd(SIM_CPU * cpu,int dagno,bs32 M)599 dagadd (SIM_CPU *cpu, int dagno, bs32 M)
600 {
601 bu64 i = IREG (dagno);
602 bu64 l = LREG (dagno);
603 bu64 b = BREG (dagno);
604 bu64 m = (bu32)M;
605
606 bu64 LB, IM, IML;
607 bu32 im32, iml32, lb32, res;
608 bu64 msb, car;
609
610 /* A naïve implementation that mostly works:
611 res = i + m;
612 if (l && res >= b + l)
613 res -= l;
614 STORE (IREG (dagno), res);
615 */
616
617 msb = (bu64)1 << 31;
618 car = (bu64)1 << 32;
619
620 IM = i + m;
621 im32 = IM;
622 LB = l + b;
623 lb32 = LB;
624
625 if (M < 0)
626 {
627 IML = i + m + l;
628 iml32 = IML;
629 if ((i & msb) || (IM & car))
630 res = (im32 < b) ? iml32 : im32;
631 else
632 res = (im32 < b) ? im32 : iml32;
633 }
634 else
635 {
636 IML = i + m - l;
637 iml32 = IML;
638 if ((IM & car) == (LB & car))
639 res = (im32 < lb32) ? im32 : iml32;
640 else
641 res = (im32 < lb32) ? iml32 : im32;
642 }
643
644 STORE (IREG (dagno), res);
645 return res;
646 }
647
648 /* See dagadd() notes above. */
649 static bu32
dagsub(SIM_CPU * cpu,int dagno,bs32 M)650 dagsub (SIM_CPU *cpu, int dagno, bs32 M)
651 {
652 bu64 i = IREG (dagno);
653 bu64 l = LREG (dagno);
654 bu64 b = BREG (dagno);
655 bu64 m = (bu32)M;
656
657 bu64 mbar = (bu32)(~m + 1);
658 bu64 LB, IM, IML;
659 bu32 b32, im32, iml32, lb32, res;
660 bu64 msb, car;
661
662 /* A naïve implementation that mostly works:
663 res = i - m;
664 if (l && newi < b)
665 newi += l;
666 STORE (IREG (dagno), newi);
667 */
668
669 msb = (bu64)1 << 31;
670 car = (bu64)1 << 32;
671
672 IM = i + mbar;
673 im32 = IM;
674 LB = l + b;
675 lb32 = LB;
676
677 if (M < 0)
678 {
679 IML = i + mbar - l;
680 iml32 = IML;
681 if (!!((i & msb) && (IM & car)) == !!(LB & car))
682 res = (im32 < lb32) ? im32 : iml32;
683 else
684 res = (im32 < lb32) ? iml32 : im32;
685 }
686 else
687 {
688 IML = i + mbar + l;
689 iml32 = IML;
690 b32 = b;
691 if (M == 0 || IM & car)
692 res = (im32 < b32) ? iml32 : im32;
693 else
694 res = (im32 < b32) ? im32 : iml32;
695 }
696
697 STORE (IREG (dagno), res);
698 return res;
699 }
700
701 static bu40
ashiftrt(SIM_CPU * cpu,bu40 val,int cnt,int size)702 ashiftrt (SIM_CPU *cpu, bu40 val, int cnt, int size)
703 {
704 int real_cnt = cnt > size ? size : cnt;
705 bu40 sgn = ~(((val & 0xFFFFFFFFFFull) >> (size - 1)) - 1);
706 int sgncnt = size - real_cnt;
707 if (sgncnt > 16)
708 sgn <<= 16, sgncnt -= 16;
709 sgn <<= sgncnt;
710 if (real_cnt > 16)
711 val >>= 16, real_cnt -= 16;
712 val >>= real_cnt;
713 val |= sgn;
714 SET_ASTATREG (an, val >> (size - 1));
715 SET_ASTATREG (az, val == 0);
716 /* XXX: Need to check ASTAT[v] behavior here. */
717 SET_ASTATREG (v, 0);
718 return val;
719 }
720
721 static bu64
lshiftrt(SIM_CPU * cpu,bu64 val,int cnt,int size)722 lshiftrt (SIM_CPU *cpu, bu64 val, int cnt, int size)
723 {
724 int real_cnt = cnt > size ? size : cnt;
725 if (real_cnt > 16)
726 val >>= 16, real_cnt -= 16;
727 val >>= real_cnt;
728 switch (size)
729 {
730 case 16:
731 val &= 0xFFFF;
732 break;
733 case 32:
734 val &= 0xFFFFFFFF;
735 break;
736 case 40:
737 val &= 0xFFFFFFFFFFull;
738 break;
739 default:
740 illegal_instruction (cpu);
741 break;
742 }
743 SET_ASTATREG (an, val >> (size - 1));
744 SET_ASTATREG (az, val == 0);
745 SET_ASTATREG (v, 0);
746 return val;
747 }
748
749 static bu64
lshift(SIM_CPU * cpu,bu64 val,int cnt,int size,bool saturate)750 lshift (SIM_CPU *cpu, bu64 val, int cnt, int size, bool saturate)
751 {
752 int i, j, real_cnt = cnt > size ? size : cnt;
753 bu64 sgn = ~((val >> (size - 1)) - 1);
754 int mask_cnt = size - 1;
755 bu64 masked, new_val = val, tmp;
756 bu64 mask = ~0;
757
758 mask <<= mask_cnt;
759 sgn <<= mask_cnt;
760 masked = val & mask;
761
762 if (real_cnt > 16)
763 new_val <<= 16, real_cnt -= 16;
764
765 new_val <<= real_cnt;
766
767 masked = new_val & mask;
768
769 /* If an operation would otherwise cause a positive value to overflow
770 and become negative, instead, saturation limits the result to the
771 maximum positive value for the size register being used.
772
773 Conversely, if an operation would otherwise cause a negative value
774 to overflow and become positive, saturation limits the result to the
775 maximum negative value for the register size.
776
777 However, it's a little more complex than looking at sign bits, we need
778 to see if we are shifting the sign information away... */
779 tmp = val & ((~mask << 1) | 1);
780
781 j = 0;
782 for (i = 1; i <= real_cnt && saturate; i++)
783 {
784 if ((tmp & ((bu64)1 << (size - 1))) !=
785 (((val >> mask_cnt) & 0x1) << mask_cnt))
786 j++;
787 tmp <<= 1;
788 }
789 saturate &= (!sgn && (new_val & (1 << mask_cnt)))
790 || (sgn && !(new_val & (1 << mask_cnt)));
791
792 switch (size)
793 {
794 case 16:
795 if (j || (saturate && (new_val & mask)))
796 new_val = sgn == 0 ? 0x7fff : 0x8000, saturate = 1;
797 new_val &= 0xFFFF;
798 break;
799 case 32:
800 new_val &= 0xFFFFFFFF;
801 masked &= 0xFFFFFFFF;
802 if (j || (saturate && ((sgn != masked) || (!sgn && new_val == 0))))
803 new_val = sgn == 0 ? 0x7fffffff : 0x80000000, saturate = 1;
804 break;
805 case 40:
806 new_val &= 0xFFFFFFFFFFull;
807 masked &= 0xFFFFFFFFFFull;
808 break;
809 default:
810 illegal_instruction (cpu);
811 break;
812 }
813
814 SET_ASTATREG (an, new_val >> (size - 1));
815 SET_ASTATREG (az, new_val == 0);
816 SET_ASTATREG (v, !!(saturate || j));
817 if (saturate || j)
818 SET_ASTATREG (vs, 1);
819 return new_val;
820 }
821
822 static bu32
algn(bu32 l,bu32 h,bu32 aln)823 algn (bu32 l, bu32 h, bu32 aln)
824 {
825 if (aln == 0)
826 return l;
827 else
828 return (l >> (8 * aln)) | (h << (32 - 8 * aln));
829 }
830
831 static bu32
saturate_s16(bu64 val,bu32 * overflow)832 saturate_s16 (bu64 val, bu32 *overflow)
833 {
834 if ((bs64)val < -0x8000ll)
835 {
836 if (overflow)
837 *overflow = 1;
838 return 0x8000;
839 }
840 if ((bs64)val > 0x7fff)
841 {
842 if (overflow)
843 *overflow = 1;
844 return 0x7fff;
845 }
846 return val & 0xffff;
847 }
848
849 static bu40
rot40(bu40 val,int shift,bu32 * cc)850 rot40 (bu40 val, int shift, bu32 *cc)
851 {
852 const int nbits = 40;
853 bu40 ret;
854
855 shift = CLAMP (shift, -nbits, nbits);
856 if (shift == 0)
857 return val;
858
859 /* Reduce everything to rotate left. */
860 if (shift < 0)
861 shift += nbits + 1;
862
863 ret = shift == nbits ? 0 : val << shift;
864 ret |= shift == 1 ? 0 : val >> ((nbits + 1) - shift);
865 ret |= (bu40)*cc << (shift - 1);
866 *cc = (val >> (nbits - shift)) & 1;
867
868 return ret;
869 }
870
871 static bu32
rot32(bu32 val,int shift,bu32 * cc)872 rot32 (bu32 val, int shift, bu32 *cc)
873 {
874 const int nbits = 32;
875 bu32 ret;
876
877 shift = CLAMP (shift, -nbits, nbits);
878 if (shift == 0)
879 return val;
880
881 /* Reduce everything to rotate left. */
882 if (shift < 0)
883 shift += nbits + 1;
884
885 ret = shift == nbits ? 0 : val << shift;
886 ret |= shift == 1 ? 0 : val >> ((nbits + 1) - shift);
887 ret |= (bu32)*cc << (shift - 1);
888 *cc = (val >> (nbits - shift)) & 1;
889
890 return ret;
891 }
892
893 static bu32
add32(SIM_CPU * cpu,bu32 a,bu32 b,int carry,int sat)894 add32 (SIM_CPU *cpu, bu32 a, bu32 b, int carry, int sat)
895 {
896 int flgs = (a >> 31) & 1;
897 int flgo = (b >> 31) & 1;
898 bu32 v = a + b;
899 int flgn = (v >> 31) & 1;
900 int overflow = (flgs ^ flgn) & (flgo ^ flgn);
901
902 if (sat && overflow)
903 {
904 v = (bu32)1 << 31;
905 if (flgn)
906 v -= 1;
907 flgn = (v >> 31) & 1;
908 }
909
910 SET_ASTATREG (an, flgn);
911 if (overflow)
912 SET_ASTATREG (vs, 1);
913 SET_ASTATREG (v, overflow);
914 ASTATREG (v_internal) |= overflow;
915 SET_ASTATREG (az, v == 0);
916 if (carry)
917 SET_ASTATREG (ac0, ~a < b);
918
919 return v;
920 }
921
922 static bu32
sub32(SIM_CPU * cpu,bu32 a,bu32 b,int carry,int sat,int parallel)923 sub32 (SIM_CPU *cpu, bu32 a, bu32 b, int carry, int sat, int parallel)
924 {
925 int flgs = (a >> 31) & 1;
926 int flgo = (b >> 31) & 1;
927 bu32 v = a - b;
928 int flgn = (v >> 31) & 1;
929 int overflow = (flgs ^ flgo) & (flgn ^ flgs);
930
931 if (sat && overflow)
932 {
933 v = (bu32)1 << 31;
934 if (flgn)
935 v -= 1;
936 flgn = (v >> 31) & 1;
937 }
938
939 if (!parallel || flgn)
940 SET_ASTATREG (an, flgn);
941 if (overflow)
942 SET_ASTATREG (vs, 1);
943 if (!parallel || overflow)
944 SET_ASTATREG (v, overflow);
945 if (!parallel || overflow)
946 ASTATREG (v_internal) |= overflow;
947 if (!parallel || v == 0)
948 SET_ASTATREG (az, v == 0);
949 if (carry && (!parallel || b <= a))
950 SET_ASTATREG (ac0, b <= a);
951
952 return v;
953 }
954
955 static bu32
add16(SIM_CPU * cpu,bu16 a,bu16 b,bu32 * carry,bu32 * overfl,bu32 * zero,bu32 * neg,int sat,int scale)956 add16 (SIM_CPU *cpu, bu16 a, bu16 b, bu32 *carry, bu32 *overfl,
957 bu32 *zero, bu32 *neg, int sat, int scale)
958 {
959 int flgs = (a >> 15) & 1;
960 int flgo = (b >> 15) & 1;
961 bs64 v = (bs16)a + (bs16)b;
962 int flgn = (v >> 15) & 1;
963 int overflow = (flgs ^ flgn) & (flgo ^ flgn);
964
965 switch (scale)
966 {
967 case 0:
968 break;
969 case 2:
970 /* (ASR) */
971 v = (a >> 1) + (a & 0x8000) + (b >> 1) + (b & 0x8000)
972 + (((a & 1) + (b & 1)) >> 1);
973 v |= -(v & 0x8000);
974 break;
975 case 3:
976 /* (ASL) */
977 v = (v << 1);
978 break;
979 default:
980 illegal_instruction (cpu);
981 }
982
983 flgn = (v >> 15) & 1;
984 overflow = (flgs ^ flgn) & (flgo ^ flgn);
985
986 if (v > (bs64)0xffff)
987 overflow = 1;
988
989 if (sat)
990 v = saturate_s16 (v, 0);
991
992 if (neg)
993 *neg |= (v >> 15) & 1;
994 if (overfl)
995 *overfl |= overflow;
996 if (zero)
997 *zero |= (v & 0xFFFF) == 0;
998 if (carry)
999 *carry |= ((bu16)~a < (bu16)b);
1000
1001 return v & 0xffff;
1002 }
1003
1004 static bu32
sub16(SIM_CPU * cpu,bu16 a,bu16 b,bu32 * carry,bu32 * overfl,bu32 * zero,bu32 * neg,int sat,int scale)1005 sub16 (SIM_CPU *cpu, bu16 a, bu16 b, bu32 *carry, bu32 *overfl,
1006 bu32 *zero, bu32 *neg, int sat, int scale)
1007 {
1008 int flgs = (a >> 15) & 1;
1009 int flgo = (b >> 15) & 1;
1010 bs64 v = (bs16)a - (bs16)b;
1011 int flgn = (v >> 15) & 1;
1012 int overflow = (flgs ^ flgo) & (flgn ^ flgs);
1013
1014 switch (scale)
1015 {
1016 case 0:
1017 break;
1018 case 2:
1019 /* (ASR) */
1020 if (sat)
1021 v = ((a >> 1) + (a & 0x8000)) - ( (b >> 1) + (b & 0x8000))
1022 + (((a & 1)-(b & 1)));
1023 else
1024 {
1025 v = ((v & 0xFFFF) >> 1);
1026 if ((!flgs & !flgo & flgn)
1027 || (flgs & !flgo & !flgn)
1028 || (flgs & flgo & flgn)
1029 || (flgs & !flgo & flgn))
1030 v |= 0x8000;
1031 }
1032 v |= -(v & 0x8000);
1033 flgn = (v >> 15) & 1;
1034 overflow = (flgs ^ flgo) & (flgn ^ flgs);
1035 break;
1036 case 3:
1037 /* (ASL) */
1038 v <<= 1;
1039 if (v > (bs64)0x7fff || v < (bs64)-0xffff)
1040 overflow = 1;
1041 break;
1042 default:
1043 illegal_instruction (cpu);
1044 }
1045
1046 if (sat)
1047 {
1048 v = saturate_s16 (v, 0);
1049 }
1050 if (neg)
1051 *neg |= (v >> 15) & 1;
1052 if (zero)
1053 *zero |= (v & 0xFFFF) == 0;
1054 if (overfl)
1055 *overfl |= overflow;
1056 if (carry)
1057 *carry |= (bu16)b <= (bu16)a;
1058 return v;
1059 }
1060
1061 static bu32
min32(SIM_CPU * cpu,bu32 a,bu32 b)1062 min32 (SIM_CPU *cpu, bu32 a, bu32 b)
1063 {
1064 int val = a;
1065 if ((bs32)a > (bs32)b)
1066 val = b;
1067 setflags_nz (cpu, val);
1068 SET_ASTATREG (v, 0);
1069 return val;
1070 }
1071
1072 static bu32
max32(SIM_CPU * cpu,bu32 a,bu32 b)1073 max32 (SIM_CPU *cpu, bu32 a, bu32 b)
1074 {
1075 int val = a;
1076 if ((bs32)a < (bs32)b)
1077 val = b;
1078 setflags_nz (cpu, val);
1079 SET_ASTATREG (v, 0);
1080 return val;
1081 }
1082
1083 static bu32
min2x16(SIM_CPU * cpu,bu32 a,bu32 b)1084 min2x16 (SIM_CPU *cpu, bu32 a, bu32 b)
1085 {
1086 int val = a;
1087 if ((bs16)a > (bs16)b)
1088 val = (val & 0xFFFF0000) | (b & 0xFFFF);
1089 if ((bs16)(a >> 16) > (bs16)(b >> 16))
1090 val = (val & 0xFFFF) | (b & 0xFFFF0000);
1091 setflags_nz_2x16 (cpu, val);
1092 SET_ASTATREG (v, 0);
1093 return val;
1094 }
1095
1096 static bu32
max2x16(SIM_CPU * cpu,bu32 a,bu32 b)1097 max2x16 (SIM_CPU *cpu, bu32 a, bu32 b)
1098 {
1099 int val = a;
1100 if ((bs16)a < (bs16)b)
1101 val = (val & 0xFFFF0000) | (b & 0xFFFF);
1102 if ((bs16)(a >> 16) < (bs16)(b >> 16))
1103 val = (val & 0xFFFF) | (b & 0xFFFF0000);
1104 setflags_nz_2x16 (cpu, val);
1105 SET_ASTATREG (v, 0);
1106 return val;
1107 }
1108
1109 static bu32
add_and_shift(SIM_CPU * cpu,bu32 a,bu32 b,int shift)1110 add_and_shift (SIM_CPU *cpu, bu32 a, bu32 b, int shift)
1111 {
1112 int v;
1113 ASTATREG (v_internal) = 0;
1114 v = add32 (cpu, a, b, 0, 0);
1115 while (shift-- > 0)
1116 {
1117 int x = (v >> 30) & 0x3;
1118 if (x == 1 || x == 2)
1119 ASTATREG (v_internal) = 1;
1120 v <<= 1;
1121 }
1122 SET_ASTATREG (az, v == 0);
1123 SET_ASTATREG (an, v & 0x80000000);
1124 SET_ASTATREG (v, ASTATREG (v_internal));
1125 if (ASTATREG (v))
1126 SET_ASTATREG (vs, 1);
1127 return v;
1128 }
1129
1130 static bu32
xor_reduce(bu64 acc0,bu64 acc1)1131 xor_reduce (bu64 acc0, bu64 acc1)
1132 {
1133 int i;
1134 bu32 v = 0;
1135 for (i = 0; i < 40; ++i)
1136 {
1137 v ^= (acc0 & acc1 & 1);
1138 acc0 >>= 1;
1139 acc1 >>= 1;
1140 }
1141 return v;
1142 }
1143
1144 /* DIVS ( Dreg, Dreg ) ;
1145 Initialize for DIVQ. Set the AQ status bit based on the signs of
1146 the 32-bit dividend and the 16-bit divisor. Left shift the dividend
1147 one bit. Copy AQ into the dividend LSB. */
1148 static bu32
divs(SIM_CPU * cpu,bu32 pquo,bu16 divisor)1149 divs (SIM_CPU *cpu, bu32 pquo, bu16 divisor)
1150 {
1151 bu16 r = pquo >> 16;
1152 int aq;
1153
1154 aq = (r ^ divisor) >> 15; /* Extract msb's and compute quotient bit. */
1155 SET_ASTATREG (aq, aq); /* Update global quotient state. */
1156
1157 pquo <<= 1;
1158 pquo |= aq;
1159 pquo = (pquo & 0x1FFFF) | (r << 17);
1160 return pquo;
1161 }
1162
1163 /* DIVQ ( Dreg, Dreg ) ;
1164 Based on AQ status bit, either add or subtract the divisor from
1165 the dividend. Then set the AQ status bit based on the MSBs of the
1166 32-bit dividend and the 16-bit divisor. Left shift the dividend one
1167 bit. Copy the logical inverse of AQ into the dividend LSB. */
1168 static bu32
divq(SIM_CPU * cpu,bu32 pquo,bu16 divisor)1169 divq (SIM_CPU *cpu, bu32 pquo, bu16 divisor)
1170 {
1171 unsigned short af = pquo >> 16;
1172 unsigned short r;
1173 int aq;
1174
1175 if (ASTATREG (aq))
1176 r = divisor + af;
1177 else
1178 r = af - divisor;
1179
1180 aq = (r ^ divisor) >> 15; /* Extract msb's and compute quotient bit. */
1181 SET_ASTATREG (aq, aq); /* Update global quotient state. */
1182
1183 pquo <<= 1;
1184 pquo |= !aq;
1185 pquo = (pquo & 0x1FFFF) | (r << 17);
1186 return pquo;
1187 }
1188
1189 /* ONES ( Dreg ) ;
1190 Count the number of bits set to 1 in the 32bit value. */
1191 static bu32
ones(bu32 val)1192 ones (bu32 val)
1193 {
1194 bu32 i;
1195 bu32 ret;
1196
1197 ret = 0;
1198 for (i = 0; i < 32; ++i)
1199 ret += !!(val & (1 << i));
1200
1201 return ret;
1202 }
1203
1204 static void
reg_check_sup(SIM_CPU * cpu,int grp,int reg)1205 reg_check_sup (SIM_CPU *cpu, int grp, int reg)
1206 {
1207 if (grp == 7)
1208 cec_require_supervisor (cpu);
1209 }
1210
1211 static void
reg_write(SIM_CPU * cpu,int grp,int reg,bu32 value)1212 reg_write (SIM_CPU *cpu, int grp, int reg, bu32 value)
1213 {
1214 bu32 *whichreg;
1215
1216 /* ASTAT is special! */
1217 if (grp == 4 && reg == 6)
1218 {
1219 SET_ASTAT (value);
1220 return;
1221 }
1222
1223 /* Check supervisor after get_allreg() so exception order is correct. */
1224 whichreg = get_allreg (cpu, grp, reg);
1225 reg_check_sup (cpu, grp, reg);
1226
1227 if (whichreg == &CYCLES2REG)
1228 /* Writes to CYCLES2 goes to the shadow. */
1229 whichreg = &CYCLES2SHDREG;
1230 else if (whichreg == &SEQSTATREG)
1231 /* Register is read only -- discard writes. */
1232 return;
1233 else if (whichreg == &EMUDAT_INREG)
1234 /* Writes to EMUDAT goes to the output. */
1235 whichreg = &EMUDAT_OUTREG;
1236 else if (whichreg == <REG (0) || whichreg == <REG (1))
1237 /* Writes to LT clears LSB automatically. */
1238 value &= ~0x1;
1239 else if (whichreg == &AXREG (0) || whichreg == &AXREG (1))
1240 value &= 0xFF;
1241
1242 TRACE_REGISTER (cpu, "wrote %s = %#x", get_allreg_name (grp, reg), value);
1243
1244 *whichreg = value;
1245 }
1246
1247 static bu32
reg_read(SIM_CPU * cpu,int grp,int reg)1248 reg_read (SIM_CPU *cpu, int grp, int reg)
1249 {
1250 bu32 *whichreg;
1251 bu32 value;
1252
1253 /* ASTAT is special! */
1254 if (grp == 4 && reg == 6)
1255 return ASTAT;
1256
1257 /* Check supervisor after get_allreg() so exception order is correct. */
1258 whichreg = get_allreg (cpu, grp, reg);
1259 reg_check_sup (cpu, grp, reg);
1260
1261 value = *whichreg;
1262
1263 if (whichreg == &CYCLESREG)
1264 /* Reads of CYCLES reloads CYCLES2 from the shadow. */
1265 SET_CYCLES2REG (CYCLES2SHDREG);
1266 else if ((whichreg == &AXREG (1) || whichreg == &AXREG (0)) && (value & 0x80))
1267 /* Sign extend if necessary. */
1268 value |= 0xFFFFFF00;
1269
1270 return value;
1271 }
1272
1273 static bu64
get_extended_cycles(SIM_CPU * cpu)1274 get_extended_cycles (SIM_CPU *cpu)
1275 {
1276 return ((bu64)CYCLES2SHDREG << 32) | CYCLESREG;
1277 }
1278
1279 /* We can't re-use sim_events_time() because the CYCLES registers may be
1280 written/cleared/reset/stopped/started at any time by software. */
1281 static void
cycles_inc(SIM_CPU * cpu,bu32 inc)1282 cycles_inc (SIM_CPU *cpu, bu32 inc)
1283 {
1284 bu64 cycles;
1285 bu32 cycles2;
1286
1287 if (!(SYSCFGREG & SYSCFG_CCEN))
1288 return;
1289
1290 cycles = get_extended_cycles (cpu) + inc;
1291 SET_CYCLESREG (cycles);
1292 cycles2 = cycles >> 32;
1293 if (CYCLES2SHDREG != cycles2)
1294 SET_CYCLES2SHDREG (cycles2);
1295 }
1296
1297 static bu64
get_unextended_acc(SIM_CPU * cpu,int which)1298 get_unextended_acc (SIM_CPU *cpu, int which)
1299 {
1300 return ((bu64)(AXREG (which) & 0xff) << 32) | AWREG (which);
1301 }
1302
1303 static bu64
get_extended_acc(SIM_CPU * cpu,int which)1304 get_extended_acc (SIM_CPU *cpu, int which)
1305 {
1306 bu64 acc = AXREG (which);
1307 /* Sign extend accumulator values before adding. */
1308 if (acc & 0x80)
1309 acc |= -0x80;
1310 else
1311 acc &= 0xFF;
1312 acc <<= 32;
1313 acc |= AWREG (which);
1314 return acc;
1315 }
1316
1317 /* Perform a multiplication of D registers SRC0 and SRC1, sign- or
1318 zero-extending the result to 64 bit. H0 and H1 determine whether the
1319 high part or the low part of the source registers is used. Store 1 in
1320 *PSAT if saturation occurs, 0 otherwise. */
1321 static bu64
decode_multfunc(SIM_CPU * cpu,int h0,int h1,int src0,int src1,int mmod,int MM,bu32 * psat)1322 decode_multfunc (SIM_CPU *cpu, int h0, int h1, int src0, int src1, int mmod,
1323 int MM, bu32 *psat)
1324 {
1325 bu32 s0 = DREG (src0), s1 = DREG (src1);
1326 bu32 sgn0, sgn1;
1327 bu32 val;
1328 bu64 val1;
1329
1330 if (h0)
1331 s0 >>= 16;
1332
1333 if (h1)
1334 s1 >>= 16;
1335
1336 s0 &= 0xffff;
1337 s1 &= 0xffff;
1338
1339 sgn0 = -(s0 & 0x8000);
1340 sgn1 = -(s1 & 0x8000);
1341
1342 if (MM)
1343 s0 |= sgn0;
1344 else
1345 switch (mmod)
1346 {
1347 case 0:
1348 case M_S2RND:
1349 case M_T:
1350 case M_IS:
1351 case M_ISS2:
1352 case M_IH:
1353 case M_W32:
1354 s0 |= sgn0;
1355 s1 |= sgn1;
1356 break;
1357 case M_FU:
1358 case M_IU:
1359 case M_TFU:
1360 break;
1361 default:
1362 illegal_instruction (cpu);
1363 }
1364
1365 val = s0 * s1;
1366 /* Perform shift correction if appropriate for the mode. */
1367 *psat = 0;
1368 if (!MM && (mmod == 0 || mmod == M_T || mmod == M_S2RND || mmod == M_W32))
1369 {
1370 if (val == 0x40000000)
1371 {
1372 if (mmod == M_W32)
1373 val = 0x7fffffff;
1374 else
1375 val = 0x80000000;
1376 *psat = 1;
1377 }
1378 else
1379 val <<= 1;
1380 }
1381 val1 = val;
1382
1383 if (mmod == 0 || mmod == M_IS || mmod == M_T || mmod == M_S2RND
1384 || mmod == M_ISS2 || mmod == M_IH || (MM && mmod == M_FU))
1385 val1 |= -(val1 & 0x80000000);
1386
1387 if (*psat)
1388 val1 &= 0xFFFFFFFFull;
1389
1390 return val1;
1391 }
1392
1393 static bu40
saturate_s40_astat(bu64 val,bu32 * v)1394 saturate_s40_astat (bu64 val, bu32 *v)
1395 {
1396 if ((bs64)val < -((bs64)1 << 39))
1397 {
1398 *v = 1;
1399 return -((bs64)1 << 39);
1400 }
1401 else if ((bs64)val >= ((bs64)1 << 39) - 1)
1402 {
1403 *v = 1;
1404 return ((bu64)1 << 39) - 1;
1405 }
1406 *v = 0; /* No overflow. */
1407 return val;
1408 }
1409
1410 static bu40
saturate_s40(bu64 val)1411 saturate_s40 (bu64 val)
1412 {
1413 bu32 v;
1414 return saturate_s40_astat (val, &v);
1415 }
1416
1417 static bu32
saturate_s32(bu64 val,bu32 * overflow)1418 saturate_s32 (bu64 val, bu32 *overflow)
1419 {
1420 if ((bs64)val < -0x80000000ll)
1421 {
1422 if (overflow)
1423 *overflow = 1;
1424 return 0x80000000;
1425 }
1426 if ((bs64)val > 0x7fffffff)
1427 {
1428 if (overflow)
1429 *overflow = 1;
1430 return 0x7fffffff;
1431 }
1432 return val;
1433 }
1434
1435 static bu32
saturate_u32(bu64 val,bu32 * overflow)1436 saturate_u32 (bu64 val, bu32 *overflow)
1437 {
1438 if (val > 0xffffffff)
1439 {
1440 if (overflow)
1441 *overflow = 1;
1442 return 0xffffffff;
1443 }
1444 return val;
1445 }
1446
1447 static bu32
saturate_u16(bu64 val,bu32 * overflow)1448 saturate_u16 (bu64 val, bu32 *overflow)
1449 {
1450 if (val > 0xffff)
1451 {
1452 if (overflow)
1453 *overflow = 1;
1454 return 0xffff;
1455 }
1456 return val;
1457 }
1458
1459 static bu64
rnd16(bu64 val)1460 rnd16 (bu64 val)
1461 {
1462 bu64 sgnbits;
1463
1464 /* FIXME: Should honour rounding mode. */
1465 if ((val & 0xffff) > 0x8000
1466 || ((val & 0xffff) == 0x8000 && (val & 0x10000)))
1467 val += 0x8000;
1468
1469 sgnbits = val & 0xffff000000000000ull;
1470 val >>= 16;
1471 return val | sgnbits;
1472 }
1473
1474 static bu64
trunc16(bu64 val)1475 trunc16 (bu64 val)
1476 {
1477 bu64 sgnbits = val & 0xffff000000000000ull;
1478 val >>= 16;
1479 return val | sgnbits;
1480 }
1481
1482 static int
signbits(bu64 val,int size)1483 signbits (bu64 val, int size)
1484 {
1485 bu64 mask = (bu64)1 << (size - 1);
1486 bu64 bit = val & mask;
1487 int count = 0;
1488 for (;;)
1489 {
1490 mask >>= 1;
1491 bit >>= 1;
1492 if (mask == 0)
1493 break;
1494 if ((val & mask) != bit)
1495 break;
1496 count++;
1497 }
1498 if (size == 40)
1499 count -= 8;
1500
1501 return count;
1502 }
1503
1504 /* Extract a 16 or 32 bit value from a 64 bit multiplication result.
1505 These 64 bits must be sign- or zero-extended properly from the source
1506 we want to extract, either a 32 bit multiply or a 40 bit accumulator. */
1507
1508 static bu32
extract_mult(SIM_CPU * cpu,bu64 res,int mmod,int MM,int fullword,bu32 * overflow)1509 extract_mult (SIM_CPU *cpu, bu64 res, int mmod, int MM,
1510 int fullword, bu32 *overflow)
1511 {
1512 if (fullword)
1513 switch (mmod)
1514 {
1515 case 0:
1516 case M_IS:
1517 return saturate_s32 (res, overflow);
1518 case M_IU:
1519 return saturate_u32 (res, overflow);
1520 case M_FU:
1521 if (MM)
1522 return saturate_s32 (res, overflow);
1523 return saturate_u32 (res, overflow);
1524 case M_S2RND:
1525 case M_ISS2:
1526 return saturate_s32 (res << 1, overflow);
1527 default:
1528 illegal_instruction (cpu);
1529 }
1530 else
1531 switch (mmod)
1532 {
1533 case 0:
1534 case M_W32:
1535 return saturate_s16 (rnd16 (res), overflow);
1536 case M_IH:
1537 return saturate_s32 (rnd16 (res), overflow) & 0xFFFF;
1538 case M_IS:
1539 return saturate_s16 (res, overflow);
1540 case M_FU:
1541 if (MM)
1542 return saturate_s16 (rnd16 (res), overflow);
1543 return saturate_u16 (rnd16 (res), overflow);
1544 case M_IU:
1545 if (MM)
1546 return saturate_s16 (res, overflow);
1547 return saturate_u16 (res, overflow);
1548
1549 case M_T:
1550 return saturate_s16 (trunc16 (res), overflow);
1551 case M_TFU:
1552 return saturate_u16 (trunc16 (res), overflow);
1553
1554 case M_S2RND:
1555 return saturate_s16 (rnd16 (res << 1), overflow);
1556 case M_ISS2:
1557 return saturate_s16 (res << 1, overflow);
1558 default:
1559 illegal_instruction (cpu);
1560 }
1561 }
1562
1563 static bu32
decode_macfunc(SIM_CPU * cpu,int which,int op,int h0,int h1,int src0,int src1,int mmod,int MM,int fullword,bu32 * overflow,bu32 * neg)1564 decode_macfunc (SIM_CPU *cpu, int which, int op, int h0, int h1, int src0,
1565 int src1, int mmod, int MM, int fullword, bu32 *overflow,
1566 bu32 *neg)
1567 {
1568 bu64 acc;
1569 bu32 sat = 0, tsat, ret;
1570
1571 /* Sign extend accumulator if necessary, otherwise unsigned. */
1572 if (mmod == 0 || mmod == M_T || mmod == M_IS || mmod == M_ISS2
1573 || mmod == M_S2RND || mmod == M_IH || mmod == M_W32)
1574 acc = get_extended_acc (cpu, which);
1575 else
1576 acc = get_unextended_acc (cpu, which);
1577
1578 if (MM && (mmod == M_T || mmod == M_IS || mmod == M_ISS2
1579 || mmod == M_S2RND || mmod == M_IH || mmod == M_W32))
1580 acc |= -(acc & 0x80000000);
1581
1582 if (op != 3)
1583 {
1584 bu8 sgn0 = (acc >> 31) & 1;
1585 /* This can't saturate, so we don't keep track of the sat flag. */
1586 bu64 res = decode_multfunc (cpu, h0, h1, src0, src1, mmod,
1587 MM, &tsat);
1588
1589 /* Perform accumulation. */
1590 switch (op)
1591 {
1592 case 0:
1593 acc = res;
1594 sgn0 = (acc >> 31) & 1;
1595 break;
1596 case 1:
1597 acc = acc + res;
1598 break;
1599 case 2:
1600 acc = acc - res;
1601 break;
1602 }
1603
1604 /* Saturate. */
1605 switch (mmod)
1606 {
1607 case 0:
1608 case M_T:
1609 case M_IS:
1610 case M_ISS2:
1611 case M_S2RND:
1612 if ((bs64)acc < -((bs64)1 << 39))
1613 acc = -((bu64)1 << 39), sat = 1;
1614 else if ((bs64)acc > 0x7fffffffffll)
1615 acc = 0x7fffffffffull, sat = 1;
1616 break;
1617 case M_TFU:
1618 if (!MM && acc > 0xFFFFFFFFFFull)
1619 acc = 0x0, sat = 1;
1620 if (MM && acc > 0xFFFFFFFF)
1621 acc &= 0xFFFFFFFF;
1622 break;
1623 case M_IU:
1624 if (acc & 0x8000000000000000ull)
1625 acc = 0x0, sat = 1;
1626 if (acc > 0xFFFFFFFFFFull)
1627 acc &= 0xFFFFFFFFFFull, sat = 1;
1628 if (MM && acc > 0xFFFFFFFF)
1629 acc &= 0xFFFFFFFF;
1630 if (acc & 0x80000000)
1631 acc |= 0xffffffff00000000ull;
1632 break;
1633 case M_FU:
1634 if (!MM && (bs64)acc < 0)
1635 acc = 0x0, sat = 1;
1636 if (MM && (bs64)acc < -((bs64)1 << 39))
1637 acc = -((bu64)1 << 39), sat = 1;
1638 if (!MM && (bs64)acc > (bs64)0xFFFFFFFFFFll)
1639 acc = 0xFFFFFFFFFFull, sat = 1;
1640 if (MM && acc > 0xFFFFFFFFFFull)
1641 acc &= 0xFFFFFFFFFFull;
1642 if (MM && acc & 0x80000000)
1643 acc |= 0xffffffff00000000ull;
1644 break;
1645 case M_IH:
1646 if ((bs64)acc < -0x80000000ll)
1647 acc = -0x80000000ull, sat = 1;
1648 else if ((bs64)acc >= 0x7fffffffll)
1649 acc = 0x7fffffffull, sat = 1;
1650 break;
1651 case M_W32:
1652 if (sgn0 && (sgn0 != ((acc >> 31) & 1))
1653 && (((acc >> 32) & 0xFF) == 0xff))
1654 acc = 0x80000000;
1655 acc &= 0xffffffff;
1656 if (acc & 0x80000000)
1657 acc |= 0xffffffff00000000ull;
1658 break;
1659 default:
1660 illegal_instruction (cpu);
1661 }
1662
1663 if (acc & 0x8000000000ull)
1664 *neg = 1;
1665
1666 STORE (AXREG (which), (acc >> 32) & 0xff);
1667 STORE (AWREG (which), acc & 0xffffffff);
1668 STORE (ASTATREG (av[which]), sat);
1669 if (sat)
1670 STORE (ASTATREG (avs[which]), sat);
1671 }
1672
1673 ret = extract_mult (cpu, acc, mmod, MM, fullword, overflow);
1674
1675 if (!fullword)
1676 {
1677 if (ret & 0x8000)
1678 *neg = 1;
1679 }
1680 else
1681 {
1682 if (ret & 0x80000000)
1683 *neg = 1;
1684 }
1685
1686 return ret;
1687 }
1688
1689 bu32
hwloop_get_next_pc(SIM_CPU * cpu,bu32 pc,bu32 insn_len)1690 hwloop_get_next_pc (SIM_CPU *cpu, bu32 pc, bu32 insn_len)
1691 {
1692 int i;
1693
1694 if (insn_len == 0)
1695 return pc;
1696
1697 /* If our PC has reached the bottom of a hardware loop,
1698 move back up to the top of the hardware loop. */
1699 for (i = 1; i >= 0; --i)
1700 if (LCREG (i) > 1 && pc == LBREG (i))
1701 {
1702 TRACE_BRANCH (cpu, pc, LTREG (i), i, "Hardware loop %i", i);
1703 return LTREG (i);
1704 }
1705
1706 return pc + insn_len;
1707 }
1708
1709 static void
decode_ProgCtrl_0(SIM_CPU * cpu,bu16 iw0,bu32 pc)1710 decode_ProgCtrl_0 (SIM_CPU *cpu, bu16 iw0, bu32 pc)
1711 {
1712 /* ProgCtrl
1713 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
1714 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |.prgfunc.......|.poprnd........|
1715 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
1716 int poprnd = ((iw0 >> ProgCtrl_poprnd_bits) & ProgCtrl_poprnd_mask);
1717 int prgfunc = ((iw0 >> ProgCtrl_prgfunc_bits) & ProgCtrl_prgfunc_mask);
1718
1719 TRACE_EXTRACT (cpu, "%s: poprnd:%i prgfunc:%i", __func__, poprnd, prgfunc);
1720
1721 if (prgfunc == 0 && poprnd == 0)
1722 {
1723 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_nop);
1724 TRACE_INSN (cpu, "NOP;");
1725 }
1726 else if (prgfunc == 1 && poprnd == 0)
1727 {
1728 bu32 newpc = RETSREG;
1729 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_branch);
1730 TRACE_INSN (cpu, "RTS;");
1731 IFETCH_CHECK (newpc);
1732 if (INSN_LEN == 8)
1733 illegal_instruction_combination (cpu);
1734 TRACE_BRANCH (cpu, pc, newpc, -1, "RTS");
1735 SET_PCREG (newpc);
1736 BFIN_CPU_STATE.did_jump = true;
1737 CYCLE_DELAY = 5;
1738 }
1739 else if (prgfunc == 1 && poprnd == 1)
1740 {
1741 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_branch);
1742 TRACE_INSN (cpu, "RTI;");
1743 /* Do not do IFETCH_CHECK here -- LSB has special meaning. */
1744 if (INSN_LEN == 8)
1745 illegal_instruction_combination (cpu);
1746 cec_return (cpu, -1);
1747 CYCLE_DELAY = 5;
1748 }
1749 else if (prgfunc == 1 && poprnd == 2)
1750 {
1751 bu32 newpc = RETXREG;
1752 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_branch);
1753 TRACE_INSN (cpu, "RTX;");
1754 /* XXX: Not sure if this is what the hardware does. */
1755 IFETCH_CHECK (newpc);
1756 if (INSN_LEN == 8)
1757 illegal_instruction_combination (cpu);
1758 cec_return (cpu, IVG_EVX);
1759 CYCLE_DELAY = 5;
1760 }
1761 else if (prgfunc == 1 && poprnd == 3)
1762 {
1763 bu32 newpc = RETNREG;
1764 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_branch);
1765 TRACE_INSN (cpu, "RTN;");
1766 /* XXX: Not sure if this is what the hardware does. */
1767 IFETCH_CHECK (newpc);
1768 if (INSN_LEN == 8)
1769 illegal_instruction_combination (cpu);
1770 cec_return (cpu, IVG_NMI);
1771 CYCLE_DELAY = 5;
1772 }
1773 else if (prgfunc == 1 && poprnd == 4)
1774 {
1775 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_branch);
1776 TRACE_INSN (cpu, "RTE;");
1777 if (INSN_LEN == 8)
1778 illegal_instruction_combination (cpu);
1779 cec_return (cpu, IVG_EMU);
1780 CYCLE_DELAY = 5;
1781 }
1782 else if (prgfunc == 2 && poprnd == 0)
1783 {
1784 SIM_DESC sd = CPU_STATE (cpu);
1785 sim_events *events = STATE_EVENTS (sd);
1786
1787 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_sync);
1788 /* XXX: in supervisor mode, utilizes wake up sources
1789 in user mode, it's a NOP ... */
1790 TRACE_INSN (cpu, "IDLE;");
1791
1792 if (INSN_LEN == 8)
1793 illegal_instruction_combination (cpu);
1794
1795 /* Timewarp ! */
1796 if (events->queue)
1797 CYCLE_DELAY = events->time_from_event;
1798 else
1799 abort (); /* XXX: Should this ever happen ? */
1800 }
1801 else if (prgfunc == 2 && poprnd == 3)
1802 {
1803 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_sync);
1804 /* Just NOP it. */
1805 TRACE_INSN (cpu, "CSYNC;");
1806 if (INSN_LEN == 8)
1807 illegal_instruction_combination (cpu);
1808 CYCLE_DELAY = 10;
1809 }
1810 else if (prgfunc == 2 && poprnd == 4)
1811 {
1812 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_sync);
1813 /* Just NOP it. */
1814 TRACE_INSN (cpu, "SSYNC;");
1815 if (INSN_LEN == 8)
1816 illegal_instruction_combination (cpu);
1817
1818 /* Really 10+, but no model info for this. */
1819 CYCLE_DELAY = 10;
1820 }
1821 else if (prgfunc == 2 && poprnd == 5)
1822 {
1823 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_cec);
1824 TRACE_INSN (cpu, "EMUEXCPT;");
1825 if (INSN_LEN == 8)
1826 illegal_instruction_combination (cpu);
1827 cec_exception (cpu, VEC_SIM_TRAP);
1828 }
1829 else if (prgfunc == 3 && poprnd < 8)
1830 {
1831 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_cec);
1832 TRACE_INSN (cpu, "CLI R%i;", poprnd);
1833 if (INSN_LEN == 8)
1834 illegal_instruction_combination (cpu);
1835 SET_DREG (poprnd, cec_cli (cpu));
1836 }
1837 else if (prgfunc == 4 && poprnd < 8)
1838 {
1839 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_cec);
1840 TRACE_INSN (cpu, "STI R%i;", poprnd);
1841 if (INSN_LEN == 8)
1842 illegal_instruction_combination (cpu);
1843 cec_sti (cpu, DREG (poprnd));
1844 CYCLE_DELAY = 3;
1845 }
1846 else if (prgfunc == 5 && poprnd < 8)
1847 {
1848 bu32 newpc = PREG (poprnd);
1849 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_branch);
1850 TRACE_INSN (cpu, "JUMP (%s);", get_preg_name (poprnd));
1851 IFETCH_CHECK (newpc);
1852 if (INSN_LEN == 8)
1853 illegal_instruction_combination (cpu);
1854 TRACE_BRANCH (cpu, pc, newpc, -1, "JUMP (Preg)");
1855 SET_PCREG (newpc);
1856 BFIN_CPU_STATE.did_jump = true;
1857 PROFILE_BRANCH_TAKEN (cpu);
1858 CYCLE_DELAY = 5;
1859 }
1860 else if (prgfunc == 6 && poprnd < 8)
1861 {
1862 bu32 newpc = PREG (poprnd);
1863 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_branch);
1864 TRACE_INSN (cpu, "CALL (%s);", get_preg_name (poprnd));
1865 IFETCH_CHECK (newpc);
1866 if (INSN_LEN == 8)
1867 illegal_instruction_combination (cpu);
1868 TRACE_BRANCH (cpu, pc, newpc, -1, "CALL (Preg)");
1869 /* If we're at the end of a hardware loop, RETS is going to be
1870 the top of the loop rather than the next instruction. */
1871 SET_RETSREG (hwloop_get_next_pc (cpu, pc, 2));
1872 SET_PCREG (newpc);
1873 BFIN_CPU_STATE.did_jump = true;
1874 PROFILE_BRANCH_TAKEN (cpu);
1875 CYCLE_DELAY = 5;
1876 }
1877 else if (prgfunc == 7 && poprnd < 8)
1878 {
1879 bu32 newpc = pc + PREG (poprnd);
1880 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_branch);
1881 TRACE_INSN (cpu, "CALL (PC + %s);", get_preg_name (poprnd));
1882 IFETCH_CHECK (newpc);
1883 if (INSN_LEN == 8)
1884 illegal_instruction_combination (cpu);
1885 TRACE_BRANCH (cpu, pc, newpc, -1, "CALL (PC + Preg)");
1886 SET_RETSREG (hwloop_get_next_pc (cpu, pc, 2));
1887 SET_PCREG (newpc);
1888 BFIN_CPU_STATE.did_jump = true;
1889 PROFILE_BRANCH_TAKEN (cpu);
1890 CYCLE_DELAY = 5;
1891 }
1892 else if (prgfunc == 8 && poprnd < 8)
1893 {
1894 bu32 newpc = pc + PREG (poprnd);
1895 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_branch);
1896 TRACE_INSN (cpu, "JUMP (PC + %s);", get_preg_name (poprnd));
1897 IFETCH_CHECK (newpc);
1898 if (INSN_LEN == 8)
1899 illegal_instruction_combination (cpu);
1900 TRACE_BRANCH (cpu, pc, newpc, -1, "JUMP (PC + Preg)");
1901 SET_PCREG (newpc);
1902 BFIN_CPU_STATE.did_jump = true;
1903 PROFILE_BRANCH_TAKEN (cpu);
1904 CYCLE_DELAY = 5;
1905 }
1906 else if (prgfunc == 9)
1907 {
1908 int raise = uimm4 (poprnd);
1909 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_cec);
1910 TRACE_INSN (cpu, "RAISE %s;", uimm4_str (raise));
1911 if (INSN_LEN == 8)
1912 illegal_instruction_combination (cpu);
1913 cec_require_supervisor (cpu);
1914 if (raise == IVG_IVHW)
1915 cec_hwerr (cpu, HWERR_RAISE_5);
1916 else
1917 cec_latch (cpu, raise);
1918 CYCLE_DELAY = 3; /* XXX: Only if IVG is unmasked. */
1919 }
1920 else if (prgfunc == 10)
1921 {
1922 int excpt = uimm4 (poprnd);
1923 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_cec);
1924 TRACE_INSN (cpu, "EXCPT %s;", uimm4_str (excpt));
1925 if (INSN_LEN == 8)
1926 illegal_instruction_combination (cpu);
1927 cec_exception (cpu, excpt);
1928 CYCLE_DELAY = 3;
1929 }
1930 else if (prgfunc == 11 && poprnd < 6)
1931 {
1932 bu32 addr = PREG (poprnd);
1933 bu8 byte;
1934 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ProgCtrl_atomic);
1935 TRACE_INSN (cpu, "TESTSET (%s);", get_preg_name (poprnd));
1936 if (INSN_LEN == 8)
1937 illegal_instruction_combination (cpu);
1938 byte = GET_WORD (addr);
1939 SET_CCREG (byte == 0);
1940 PUT_BYTE (addr, byte | 0x80);
1941 /* Also includes memory stalls, but we don't model that. */
1942 CYCLE_DELAY = 2;
1943 }
1944 else
1945 illegal_instruction (cpu);
1946 }
1947
1948 static void
decode_CaCTRL_0(SIM_CPU * cpu,bu16 iw0)1949 decode_CaCTRL_0 (SIM_CPU *cpu, bu16 iw0)
1950 {
1951 /* CaCTRL
1952 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
1953 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 |.a.|.op....|.reg.......|
1954 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
1955 int a = ((iw0 >> CaCTRL_a_bits) & CaCTRL_a_mask);
1956 int op = ((iw0 >> CaCTRL_op_bits) & CaCTRL_op_mask);
1957 int reg = ((iw0 >> CaCTRL_reg_bits) & CaCTRL_reg_mask);
1958 bu32 preg = PREG (reg);
1959 const char * const sinsn[] = { "PREFETCH", "FLUSHINV", "FLUSH", "IFLUSH", };
1960
1961 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_CaCTRL);
1962 TRACE_EXTRACT (cpu, "%s: a:%i op:%i reg:%i", __func__, a, op, reg);
1963 TRACE_INSN (cpu, "%s [%s%s];", sinsn[op], get_preg_name (reg), a ? "++" : "");
1964
1965 if (INSN_LEN == 8)
1966 /* None of these can be part of a parallel instruction. */
1967 illegal_instruction_combination (cpu);
1968
1969 /* No cache simulation, so these are (mostly) all NOPs.
1970 XXX: The hardware takes care of masking to cache lines, but need
1971 to check behavior of the post increment. Should we be aligning
1972 the value to the cache line before adding the cache line size, or
1973 do we just add the cache line size ? */
1974 if (op == 0)
1975 { /* PREFETCH */
1976 mmu_check_cache_addr (cpu, preg, false, false);
1977 }
1978 else if (op == 1)
1979 { /* FLUSHINV */
1980 mmu_check_cache_addr (cpu, preg, true, false);
1981 }
1982 else if (op == 2)
1983 { /* FLUSH */
1984 mmu_check_cache_addr (cpu, preg, true, false);
1985 }
1986 else if (op == 3)
1987 { /* IFLUSH */
1988 mmu_check_cache_addr (cpu, preg, false, true);
1989 }
1990
1991 if (a)
1992 SET_PREG (reg, preg + BFIN_L1_CACHE_BYTES);
1993 }
1994
1995 static void
decode_PushPopReg_0(SIM_CPU * cpu,bu16 iw0)1996 decode_PushPopReg_0 (SIM_CPU *cpu, bu16 iw0)
1997 {
1998 /* PushPopReg
1999 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2000 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |.W.|.grp.......|.reg.......|
2001 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2002 int W = ((iw0 >> PushPopReg_W_bits) & PushPopReg_W_mask);
2003 int grp = ((iw0 >> PushPopReg_grp_bits) & PushPopReg_grp_mask);
2004 int reg = ((iw0 >> PushPopReg_reg_bits) & PushPopReg_reg_mask);
2005 const char *reg_name = get_allreg_name (grp, reg);
2006 bu32 value;
2007 bu32 sp = SPREG;
2008
2009 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_PushPopReg);
2010 TRACE_EXTRACT (cpu, "%s: W:%i grp:%i reg:%i", __func__, W, grp, reg);
2011 TRACE_DECODE (cpu, "%s: reg:%s", __func__, reg_name);
2012
2013 /* Can't push/pop reserved registers */
2014 if (reg_is_reserved (grp, reg))
2015 illegal_instruction (cpu);
2016
2017 if (W == 0)
2018 {
2019 /* Dreg and Preg are not supported by this instruction. */
2020 if (grp == 0 || grp == 1)
2021 illegal_instruction (cpu);
2022 TRACE_INSN (cpu, "%s = [SP++];", reg_name);
2023 /* Can't pop USP while in userspace. */
2024 if (INSN_LEN == 8 || (grp == 7 && reg == 0 && cec_is_user_mode(cpu)))
2025 illegal_instruction_combination (cpu);
2026 /* XXX: The valid register check is in reg_write(), so we might
2027 incorrectly do a GET_LONG() here ... */
2028 value = GET_LONG (sp);
2029 reg_write (cpu, grp, reg, value);
2030 if (grp == 7 && reg == 3)
2031 cec_pop_reti (cpu);
2032
2033 sp += 4;
2034 }
2035 else
2036 {
2037 TRACE_INSN (cpu, "[--SP] = %s;", reg_name);
2038 /* Can't push SP. */
2039 if (INSN_LEN == 8 || (grp == 1 && reg == 6))
2040 illegal_instruction_combination (cpu);
2041
2042 sp -= 4;
2043 value = reg_read (cpu, grp, reg);
2044 if (grp == 7 && reg == 3)
2045 cec_push_reti (cpu);
2046
2047 PUT_LONG (sp, value);
2048 }
2049
2050 /* Note: SP update must be delayed until after all reads/writes; see
2051 comments in decode_PushPopMultiple_0() for more info. */
2052 SET_SPREG (sp);
2053 }
2054
2055 static void
decode_PushPopMultiple_0(SIM_CPU * cpu,bu16 iw0)2056 decode_PushPopMultiple_0 (SIM_CPU *cpu, bu16 iw0)
2057 {
2058 /* PushPopMultiple
2059 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2060 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |.d.|.p.|.W.|.dr........|.pr........|
2061 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2062 int p = ((iw0 >> PushPopMultiple_p_bits) & PushPopMultiple_p_mask);
2063 int d = ((iw0 >> PushPopMultiple_d_bits) & PushPopMultiple_d_mask);
2064 int W = ((iw0 >> PushPopMultiple_W_bits) & PushPopMultiple_W_mask);
2065 int dr = ((iw0 >> PushPopMultiple_dr_bits) & PushPopMultiple_dr_mask);
2066 int pr = ((iw0 >> PushPopMultiple_pr_bits) & PushPopMultiple_pr_mask);
2067 int i;
2068 bu32 sp = SPREG;
2069
2070 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_PushPopMultiple);
2071 TRACE_EXTRACT (cpu, "%s: d:%i p:%i W:%i dr:%i pr:%i",
2072 __func__, d, p, W, dr, pr);
2073
2074 if ((d == 0 && p == 0) || (p && imm5 (pr) > 5)
2075 || (d && !p && pr) || (p && !d && dr))
2076 illegal_instruction (cpu);
2077
2078 if (W == 1)
2079 {
2080 if (d && p)
2081 TRACE_INSN (cpu, "[--SP] = (R7:%i, P5:%i);", dr, pr);
2082 else if (d)
2083 TRACE_INSN (cpu, "[--SP] = (R7:%i);", dr);
2084 else
2085 TRACE_INSN (cpu, "[--SP] = (P5:%i);", pr);
2086
2087 if (d)
2088 for (i = dr; i < 8; i++)
2089 {
2090 sp -= 4;
2091 PUT_LONG (sp, DREG (i));
2092 }
2093 if (p)
2094 for (i = pr; i < 6; i++)
2095 {
2096 sp -= 4;
2097 PUT_LONG (sp, PREG (i));
2098 }
2099
2100 CYCLE_DELAY = 14;
2101 }
2102 else
2103 {
2104 if (d && p)
2105 TRACE_INSN (cpu, "(R7:%i, P5:%i) = [SP++];", dr, pr);
2106 else if (d)
2107 TRACE_INSN (cpu, "(R7:%i) = [SP++];", dr);
2108 else
2109 TRACE_INSN (cpu, "(P5:%i) = [SP++];", pr);
2110
2111 if (p)
2112 for (i = 5; i >= pr; i--)
2113 {
2114 SET_PREG (i, GET_LONG (sp));
2115 sp += 4;
2116 }
2117 if (d)
2118 for (i = 7; i >= dr; i--)
2119 {
2120 SET_DREG (i, GET_LONG (sp));
2121 sp += 4;
2122 }
2123
2124 CYCLE_DELAY = 11;
2125 }
2126
2127 /* Note: SP update must be delayed until after all reads/writes so that
2128 if an exception does occur, the insn may be re-executed as the
2129 SP has not yet changed. */
2130 SET_SPREG (sp);
2131 }
2132
2133 static void
decode_ccMV_0(SIM_CPU * cpu,bu16 iw0)2134 decode_ccMV_0 (SIM_CPU *cpu, bu16 iw0)
2135 {
2136 /* ccMV
2137 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2138 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |.T.|.d.|.s.|.dst.......|.src.......|
2139 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2140 int s = ((iw0 >> CCmv_s_bits) & CCmv_s_mask);
2141 int d = ((iw0 >> CCmv_d_bits) & CCmv_d_mask);
2142 int T = ((iw0 >> CCmv_T_bits) & CCmv_T_mask);
2143 int src = ((iw0 >> CCmv_src_bits) & CCmv_src_mask);
2144 int dst = ((iw0 >> CCmv_dst_bits) & CCmv_dst_mask);
2145 int cond = T ? CCREG : ! CCREG;
2146
2147 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ccMV);
2148 TRACE_EXTRACT (cpu, "%s: T:%i d:%i s:%i dst:%i src:%i",
2149 __func__, T, d, s, dst, src);
2150
2151 TRACE_INSN (cpu, "IF %sCC %s = %s;", T ? "" : "! ",
2152 get_allreg_name (d, dst),
2153 get_allreg_name (s, src));
2154 if (INSN_LEN == 8)
2155 illegal_instruction_combination (cpu);
2156
2157 if (cond)
2158 reg_write (cpu, d, dst, reg_read (cpu, s, src));
2159 }
2160
2161 static void
decode_CCflag_0(SIM_CPU * cpu,bu16 iw0)2162 decode_CCflag_0 (SIM_CPU *cpu, bu16 iw0)
2163 {
2164 /* CCflag
2165 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2166 | 0 | 0 | 0 | 0 | 1 |.I.|.opc.......|.G.|.y.........|.x.........|
2167 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2168 int x = ((iw0 >> CCflag_x_bits) & CCflag_x_mask);
2169 int y = ((iw0 >> CCflag_y_bits) & CCflag_y_mask);
2170 int I = ((iw0 >> CCflag_I_bits) & CCflag_I_mask);
2171 int G = ((iw0 >> CCflag_G_bits) & CCflag_G_mask);
2172 int opc = ((iw0 >> CCflag_opc_bits) & CCflag_opc_mask);
2173
2174 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_CCflag);
2175 TRACE_EXTRACT (cpu, "%s: I:%i opc:%i G:%i y:%i x:%i",
2176 __func__, I, opc, G, y, x);
2177
2178 if (opc > 4)
2179 {
2180 bs64 acc0 = get_extended_acc (cpu, 0);
2181 bs64 acc1 = get_extended_acc (cpu, 1);
2182 bs64 diff = acc0 - acc1;
2183
2184 if (x != 0 || y != 0)
2185 illegal_instruction (cpu);
2186
2187 if (opc == 5 && I == 0 && G == 0)
2188 {
2189 TRACE_INSN (cpu, "CC = A0 == A1;");
2190 if (INSN_LEN == 8)
2191 illegal_instruction_combination (cpu);
2192 SET_CCREG (acc0 == acc1);
2193 }
2194 else if (opc == 6 && I == 0 && G == 0)
2195 {
2196 TRACE_INSN (cpu, "CC = A0 < A1");
2197 if (INSN_LEN == 8)
2198 illegal_instruction_combination (cpu);
2199 SET_CCREG (acc0 < acc1);
2200 }
2201 else if (opc == 7 && I == 0 && G == 0)
2202 {
2203 TRACE_INSN (cpu, "CC = A0 <= A1");
2204 if (INSN_LEN == 8)
2205 illegal_instruction_combination (cpu);
2206 SET_CCREG (acc0 <= acc1);
2207 }
2208 else
2209 illegal_instruction (cpu);
2210
2211 SET_ASTATREG (az, diff == 0);
2212 SET_ASTATREG (an, diff < 0);
2213 SET_ASTATREG (ac0, (bu40)acc1 <= (bu40)acc0);
2214 }
2215 else
2216 {
2217 int issigned = opc < 3;
2218 const char *sign = issigned ? "" : " (IU)";
2219 bu32 srcop = G ? PREG (x) : DREG (x);
2220 char s = G ? 'P' : 'R';
2221 bu32 dstop = I ? (issigned ? imm3 (y) : uimm3 (y)) : G ? PREG (y) : DREG (y);
2222 const char *op;
2223 char d = G ? 'P' : 'R';
2224 int flgs = srcop >> 31;
2225 int flgo = dstop >> 31;
2226
2227 bu32 result = srcop - dstop;
2228 int cc;
2229 int flgn = result >> 31;
2230 int overflow = (flgs ^ flgo) & (flgn ^ flgs);
2231 int az = result == 0;
2232 int ac0 = dstop <= srcop;
2233 int an;
2234 if (issigned)
2235 an = (flgn && !overflow) || (!flgn && overflow);
2236 else
2237 an = dstop > srcop;
2238
2239 switch (opc)
2240 {
2241 default: /* Shutup useless gcc warnings. */
2242 case 0: /* signed */
2243 op = "==";
2244 cc = az;
2245 break;
2246 case 1: /* signed */
2247 op = "<";
2248 cc = an;
2249 break;
2250 case 2: /* signed */
2251 op = "<=";
2252 cc = an || az;
2253 break;
2254 case 3: /* unsigned */
2255 op = "<";
2256 cc = !ac0;
2257 break;
2258 case 4: /* unsigned */
2259 op = "<=";
2260 cc = !ac0 || az;
2261 break;
2262 }
2263
2264 if (I)
2265 TRACE_INSN (cpu, "CC = %c%i %s %s%s;", s, x, op,
2266 issigned ? imm3_str (y) : uimm3_str (y), sign);
2267 else
2268 {
2269 TRACE_DECODE (cpu, "%s %c%i:%x %c%i:%x", __func__,
2270 s, x, srcop, d, y, dstop);
2271 TRACE_INSN (cpu, "CC = %c%i %s %c%i%s;", s, x, op, d, y, sign);
2272 }
2273
2274 SET_CCREG (cc);
2275 /* Pointer compares only touch CC. */
2276 if (!G)
2277 {
2278 SET_ASTATREG (az, az);
2279 SET_ASTATREG (an, an);
2280 SET_ASTATREG (ac0, ac0);
2281 }
2282 }
2283 }
2284
2285 static void
decode_CC2dreg_0(SIM_CPU * cpu,bu16 iw0)2286 decode_CC2dreg_0 (SIM_CPU *cpu, bu16 iw0)
2287 {
2288 /* CC2dreg
2289 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2290 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |.op....|.reg.......|
2291 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2292 int op = ((iw0 >> CC2dreg_op_bits) & CC2dreg_op_mask);
2293 int reg = ((iw0 >> CC2dreg_reg_bits) & CC2dreg_reg_mask);
2294
2295 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_CC2dreg);
2296 TRACE_EXTRACT (cpu, "%s: op:%i reg:%i", __func__, op, reg);
2297
2298 if (op == 0)
2299 {
2300 TRACE_INSN (cpu, "R%i = CC;", reg);
2301 if (INSN_LEN == 8)
2302 illegal_instruction_combination (cpu);
2303 SET_DREG (reg, CCREG);
2304 }
2305 else if (op == 1)
2306 {
2307 TRACE_INSN (cpu, "CC = R%i;", reg);
2308 if (INSN_LEN == 8)
2309 illegal_instruction_combination (cpu);
2310 SET_CCREG (DREG (reg) != 0);
2311 }
2312 else if (op == 3 && reg == 0)
2313 {
2314 TRACE_INSN (cpu, "CC = !CC;");
2315 if (INSN_LEN == 8)
2316 illegal_instruction_combination (cpu);
2317 SET_CCREG (!CCREG);
2318 }
2319 else
2320 illegal_instruction (cpu);
2321 }
2322
2323 static void
decode_CC2stat_0(SIM_CPU * cpu,bu16 iw0)2324 decode_CC2stat_0 (SIM_CPU *cpu, bu16 iw0)
2325 {
2326 /* CC2stat
2327 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2328 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |.D.|.op....|.cbit..............|
2329 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2330 int D = ((iw0 >> CC2stat_D_bits) & CC2stat_D_mask);
2331 int op = ((iw0 >> CC2stat_op_bits) & CC2stat_op_mask);
2332 int cbit = ((iw0 >> CC2stat_cbit_bits) & CC2stat_cbit_mask);
2333 bu32 pval;
2334
2335 const char * const op_names[] = { "", "|", "&", "^" } ;
2336
2337 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_CC2stat);
2338 TRACE_EXTRACT (cpu, "%s: D:%i op:%i cbit:%i", __func__, D, op, cbit);
2339
2340 TRACE_INSN (cpu, "%s %s= %s;", D ? astat_names[cbit] : "CC",
2341 op_names[op], D ? "CC" : astat_names[cbit]);
2342
2343 /* CC = CC; is invalid. */
2344 if (cbit == 5)
2345 illegal_instruction (cpu);
2346
2347 if (INSN_LEN == 8)
2348 illegal_instruction_combination (cpu);
2349
2350 pval = !!(ASTAT & (1 << cbit));
2351 if (D == 0)
2352 switch (op)
2353 {
2354 case 0: SET_CCREG (pval); break;
2355 case 1: SET_CCREG (CCREG | pval); break;
2356 case 2: SET_CCREG (CCREG & pval); break;
2357 case 3: SET_CCREG (CCREG ^ pval); break;
2358 }
2359 else
2360 {
2361 switch (op)
2362 {
2363 case 0: pval = CCREG; break;
2364 case 1: pval |= CCREG; break;
2365 case 2: pval &= CCREG; break;
2366 case 3: pval ^= CCREG; break;
2367 }
2368 TRACE_REGISTER (cpu, "wrote ASTAT[%s] = %i", astat_names[cbit], pval);
2369 SET_ASTAT ((ASTAT & ~(1 << cbit)) | (pval << cbit));
2370 }
2371 }
2372
2373 static void
decode_BRCC_0(SIM_CPU * cpu,bu16 iw0,bu32 pc)2374 decode_BRCC_0 (SIM_CPU *cpu, bu16 iw0, bu32 pc)
2375 {
2376 /* BRCC
2377 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2378 | 0 | 0 | 0 | 1 |.T.|.B.|.offset................................|
2379 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2380 int B = ((iw0 >> BRCC_B_bits) & BRCC_B_mask);
2381 int T = ((iw0 >> BRCC_T_bits) & BRCC_T_mask);
2382 int offset = ((iw0 >> BRCC_offset_bits) & BRCC_offset_mask);
2383 int cond = T ? CCREG : ! CCREG;
2384 int pcrel = pcrel10 (offset);
2385
2386 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_BRCC);
2387 TRACE_EXTRACT (cpu, "%s: T:%i B:%i offset:%#x", __func__, T, B, offset);
2388 TRACE_DECODE (cpu, "%s: pcrel10:%#x", __func__, pcrel);
2389
2390 TRACE_INSN (cpu, "IF %sCC JUMP %#x%s;", T ? "" : "! ",
2391 pcrel, B ? " (bp)" : "");
2392
2393 if (INSN_LEN == 8)
2394 illegal_instruction_combination (cpu);
2395
2396 if (cond)
2397 {
2398 bu32 newpc = pc + pcrel;
2399 TRACE_BRANCH (cpu, pc, newpc, -1, "Conditional JUMP");
2400 SET_PCREG (newpc);
2401 BFIN_CPU_STATE.did_jump = true;
2402 PROFILE_BRANCH_TAKEN (cpu);
2403 CYCLE_DELAY = B ? 5 : 9;
2404 }
2405 else
2406 {
2407 PROFILE_BRANCH_UNTAKEN (cpu);
2408 CYCLE_DELAY = B ? 9 : 1;
2409 }
2410 }
2411
2412 static void
decode_UJUMP_0(SIM_CPU * cpu,bu16 iw0,bu32 pc)2413 decode_UJUMP_0 (SIM_CPU *cpu, bu16 iw0, bu32 pc)
2414 {
2415 /* UJUMP
2416 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2417 | 0 | 0 | 1 | 0 |.offset........................................|
2418 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2419 int offset = ((iw0 >> UJump_offset_bits) & UJump_offset_mask);
2420 int pcrel = pcrel12 (offset);
2421 bu32 newpc = pc + pcrel;
2422
2423 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_UJUMP);
2424 TRACE_EXTRACT (cpu, "%s: offset:%#x", __func__, offset);
2425 TRACE_DECODE (cpu, "%s: pcrel12:%#x", __func__, pcrel);
2426
2427 TRACE_INSN (cpu, "JUMP.S %#x;", pcrel);
2428
2429 if (INSN_LEN == 8)
2430 illegal_instruction_combination (cpu);
2431
2432 TRACE_BRANCH (cpu, pc, newpc, -1, "JUMP.S");
2433
2434 SET_PCREG (newpc);
2435 BFIN_CPU_STATE.did_jump = true;
2436 PROFILE_BRANCH_TAKEN (cpu);
2437 CYCLE_DELAY = 5;
2438 }
2439
2440 static void
decode_REGMV_0(SIM_CPU * cpu,bu16 iw0)2441 decode_REGMV_0 (SIM_CPU *cpu, bu16 iw0)
2442 {
2443 /* REGMV
2444 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2445 | 0 | 0 | 1 | 1 |.gd........|.gs........|.dst.......|.src.......|
2446 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2447 int gs = ((iw0 >> RegMv_gs_bits) & RegMv_gs_mask);
2448 int gd = ((iw0 >> RegMv_gd_bits) & RegMv_gd_mask);
2449 int src = ((iw0 >> RegMv_src_bits) & RegMv_src_mask);
2450 int dst = ((iw0 >> RegMv_dst_bits) & RegMv_dst_mask);
2451 const char *srcreg_name = get_allreg_name (gs, src);
2452 const char *dstreg_name = get_allreg_name (gd, dst);
2453
2454 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_REGMV);
2455 TRACE_EXTRACT (cpu, "%s: gd:%i gs:%i dst:%i src:%i",
2456 __func__, gd, gs, dst, src);
2457 TRACE_DECODE (cpu, "%s: dst:%s src:%s", __func__, dstreg_name, srcreg_name);
2458
2459 TRACE_INSN (cpu, "%s = %s;", dstreg_name, srcreg_name);
2460
2461 /* Reserved slots cannot be a src/dst. */
2462 if (reg_is_reserved (gs, src) || reg_is_reserved (gd, dst))
2463 goto invalid_move;
2464
2465 /* Standard register moves. */
2466 if ((gs < 2) /* Dregs/Pregs src */
2467 || (gd < 2) /* Dregs/Pregs dst */
2468 || (gs == 4 && src < 4) /* Accumulators src */
2469 || (gd == 4 && dst < 4 && (gs < 4)) /* Accumulators dst */
2470 || (gs == 7 && src == 7 && !(gd == 4 && dst < 4)) /* EMUDAT src */
2471 || (gd == 7 && dst == 7)) /* EMUDAT dst */
2472 goto valid_move;
2473
2474 /* dareg = dareg (IMBL) */
2475 if (gs < 4 && gd < 4)
2476 goto valid_move;
2477
2478 /* USP can be src to sysregs, but not dagregs. */
2479 if ((gs == 7 && src == 0) && (gd >= 4))
2480 goto valid_move;
2481
2482 /* USP can move between genregs (only check Accumulators). */
2483 if (((gs == 7 && src == 0) && (gd == 4 && dst < 4))
2484 || ((gd == 7 && dst == 0) && (gs == 4 && src < 4)))
2485 goto valid_move;
2486
2487 /* Still here ? Invalid reg pair. */
2488 invalid_move:
2489 illegal_instruction (cpu);
2490
2491 valid_move:
2492 reg_write (cpu, gd, dst, reg_read (cpu, gs, src));
2493 }
2494
2495 static void
decode_ALU2op_0(SIM_CPU * cpu,bu16 iw0)2496 decode_ALU2op_0 (SIM_CPU *cpu, bu16 iw0)
2497 {
2498 /* ALU2op
2499 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2500 | 0 | 1 | 0 | 0 | 0 | 0 |.opc...........|.src.......|.dst.......|
2501 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2502 int src = ((iw0 >> ALU2op_src_bits) & ALU2op_src_mask);
2503 int opc = ((iw0 >> ALU2op_opc_bits) & ALU2op_opc_mask);
2504 int dst = ((iw0 >> ALU2op_dst_bits) & ALU2op_dst_mask);
2505
2506 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_ALU2op);
2507 TRACE_EXTRACT (cpu, "%s: opc:%i src:%i dst:%i", __func__, opc, src, dst);
2508
2509 if (opc == 0)
2510 {
2511 TRACE_INSN (cpu, "R%i >>>= R%i;", dst, src);
2512 SET_DREG (dst, ashiftrt (cpu, DREG (dst), DREG (src), 32));
2513 }
2514 else if (opc == 1)
2515 {
2516 bu32 val;
2517 TRACE_INSN (cpu, "R%i >>= R%i;", dst, src);
2518 if (DREG (src) <= 0x1F)
2519 val = lshiftrt (cpu, DREG (dst), DREG (src), 32);
2520 else
2521 val = 0;
2522 SET_DREG (dst, val);
2523 }
2524 else if (opc == 2)
2525 {
2526 TRACE_INSN (cpu, "R%i <<= R%i;", dst, src);
2527 SET_DREG (dst, lshift (cpu, DREG (dst), DREG (src), 32, 0));
2528 }
2529 else if (opc == 3)
2530 {
2531 TRACE_INSN (cpu, "R%i *= R%i;", dst, src);
2532 SET_DREG (dst, DREG (dst) * DREG (src));
2533 CYCLE_DELAY = 3;
2534 }
2535 else if (opc == 4)
2536 {
2537 TRACE_INSN (cpu, "R%i = (R%i + R%i) << 1;", dst, dst, src);
2538 SET_DREG (dst, add_and_shift (cpu, DREG (dst), DREG (src), 1));
2539 }
2540 else if (opc == 5)
2541 {
2542 TRACE_INSN (cpu, "R%i = (R%i + R%i) << 2;", dst, dst, src);
2543 SET_DREG (dst, add_and_shift (cpu, DREG (dst), DREG (src), 2));
2544 }
2545 else if (opc == 8)
2546 {
2547 TRACE_INSN (cpu, "DIVQ ( R%i, R%i );", dst, src);
2548 SET_DREG (dst, divq (cpu, DREG (dst), (bu16)DREG (src)));
2549 }
2550 else if (opc == 9)
2551 {
2552 TRACE_INSN (cpu, "DIVS ( R%i, R%i );", dst, src);
2553 SET_DREG (dst, divs (cpu, DREG (dst), (bu16)DREG (src)));
2554 }
2555 else if (opc == 10)
2556 {
2557 TRACE_INSN (cpu, "R%i = R%i.L (X);", dst, src);
2558 SET_DREG (dst, (bs32) (bs16) DREG (src));
2559 setflags_logical (cpu, DREG (dst));
2560 }
2561 else if (opc == 11)
2562 {
2563 TRACE_INSN (cpu, "R%i = R%i.L (Z);", dst, src);
2564 SET_DREG (dst, (bu32) (bu16) DREG (src));
2565 setflags_logical (cpu, DREG (dst));
2566 }
2567 else if (opc == 12)
2568 {
2569 TRACE_INSN (cpu, "R%i = R%i.B (X);", dst, src);
2570 SET_DREG (dst, (bs32) (bs8) DREG (src));
2571 setflags_logical (cpu, DREG (dst));
2572 }
2573 else if (opc == 13)
2574 {
2575 TRACE_INSN (cpu, "R%i = R%i.B (Z);", dst, src);
2576 SET_DREG (dst, (bu32) (bu8) DREG (src));
2577 setflags_logical (cpu, DREG (dst));
2578 }
2579 else if (opc == 14)
2580 {
2581 bu32 val = DREG (src);
2582 TRACE_INSN (cpu, "R%i = - R%i;", dst, src);
2583 SET_DREG (dst, -val);
2584 setflags_nz (cpu, DREG (dst));
2585 SET_ASTATREG (v, val == 0x80000000);
2586 if (ASTATREG (v))
2587 SET_ASTATREG (vs, 1);
2588 SET_ASTATREG (ac0, val == 0x0);
2589 /* XXX: Documentation isn't entirely clear about av0 and av1. */
2590 }
2591 else if (opc == 15)
2592 {
2593 TRACE_INSN (cpu, "R%i = ~ R%i;", dst, src);
2594 SET_DREG (dst, ~DREG (src));
2595 setflags_logical (cpu, DREG (dst));
2596 }
2597 else
2598 illegal_instruction (cpu);
2599 }
2600
2601 static void
decode_PTR2op_0(SIM_CPU * cpu,bu16 iw0)2602 decode_PTR2op_0 (SIM_CPU *cpu, bu16 iw0)
2603 {
2604 /* PTR2op
2605 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2606 | 0 | 1 | 0 | 0 | 0 | 1 | 0 |.opc.......|.src.......|.dst.......|
2607 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2608 int src = ((iw0 >> PTR2op_src_bits) & PTR2op_dst_mask);
2609 int opc = ((iw0 >> PTR2op_opc_bits) & PTR2op_opc_mask);
2610 int dst = ((iw0 >> PTR2op_dst_bits) & PTR2op_dst_mask);
2611 const char *src_name = get_preg_name (src);
2612 const char *dst_name = get_preg_name (dst);
2613
2614 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_PTR2op);
2615 TRACE_EXTRACT (cpu, "%s: opc:%i src:%i dst:%i", __func__, opc, src, dst);
2616
2617 if (opc == 0)
2618 {
2619 TRACE_INSN (cpu, "%s -= %s", dst_name, src_name);
2620 SET_PREG (dst, PREG (dst) - PREG (src));
2621 }
2622 else if (opc == 1)
2623 {
2624 TRACE_INSN (cpu, "%s = %s << 2", dst_name, src_name);
2625 SET_PREG (dst, PREG (src) << 2);
2626 }
2627 else if (opc == 3)
2628 {
2629 TRACE_INSN (cpu, "%s = %s >> 2", dst_name, src_name);
2630 SET_PREG (dst, PREG (src) >> 2);
2631 }
2632 else if (opc == 4)
2633 {
2634 TRACE_INSN (cpu, "%s = %s >> 1", dst_name, src_name);
2635 SET_PREG (dst, PREG (src) >> 1);
2636 }
2637 else if (opc == 5)
2638 {
2639 TRACE_INSN (cpu, "%s += %s (BREV)", dst_name, src_name);
2640 SET_PREG (dst, add_brev (PREG (dst), PREG (src)));
2641 }
2642 else if (opc == 6)
2643 {
2644 TRACE_INSN (cpu, "%s = (%s + %s) << 1", dst_name, dst_name, src_name);
2645 SET_PREG (dst, (PREG (dst) + PREG (src)) << 1);
2646 }
2647 else if (opc == 7)
2648 {
2649 TRACE_INSN (cpu, "%s = (%s + %s) << 2", dst_name, dst_name, src_name);
2650 SET_PREG (dst, (PREG (dst) + PREG (src)) << 2);
2651 }
2652 else
2653 illegal_instruction (cpu);
2654 }
2655
2656 static void
decode_LOGI2op_0(SIM_CPU * cpu,bu16 iw0)2657 decode_LOGI2op_0 (SIM_CPU *cpu, bu16 iw0)
2658 {
2659 /* LOGI2op
2660 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2661 | 0 | 1 | 0 | 0 | 1 |.opc.......|.src...............|.dst.......|
2662 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2663 int src = ((iw0 >> LOGI2op_src_bits) & LOGI2op_src_mask);
2664 int opc = ((iw0 >> LOGI2op_opc_bits) & LOGI2op_opc_mask);
2665 int dst = ((iw0 >> LOGI2op_dst_bits) & LOGI2op_dst_mask);
2666 int uimm = uimm5 (src);
2667 const char *uimm_str = uimm5_str (uimm);
2668
2669 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_LOGI2op);
2670 TRACE_EXTRACT (cpu, "%s: opc:%i src:%i dst:%i", __func__, opc, src, dst);
2671 TRACE_DECODE (cpu, "%s: uimm5:%#x", __func__, uimm);
2672
2673 if (opc == 0)
2674 {
2675 TRACE_INSN (cpu, "CC = ! BITTST (R%i, %s);", dst, uimm_str);
2676 if (INSN_LEN == 8)
2677 illegal_instruction_combination (cpu);
2678 SET_CCREG ((~DREG (dst) >> uimm) & 1);
2679 }
2680 else if (opc == 1)
2681 {
2682 TRACE_INSN (cpu, "CC = BITTST (R%i, %s);", dst, uimm_str);
2683 if (INSN_LEN == 8)
2684 illegal_instruction_combination (cpu);
2685 SET_CCREG ((DREG (dst) >> uimm) & 1);
2686 }
2687 else if (opc == 2)
2688 {
2689 TRACE_INSN (cpu, "BITSET (R%i, %s);", dst, uimm_str);
2690 if (INSN_LEN == 8)
2691 illegal_instruction_combination (cpu);
2692 SET_DREG (dst, DREG (dst) | (1 << uimm));
2693 setflags_logical (cpu, DREG (dst));
2694 }
2695 else if (opc == 3)
2696 {
2697 TRACE_INSN (cpu, "BITTGL (R%i, %s);", dst, uimm_str);
2698 if (INSN_LEN == 8)
2699 illegal_instruction_combination (cpu);
2700 SET_DREG (dst, DREG (dst) ^ (1 << uimm));
2701 setflags_logical (cpu, DREG (dst));
2702 }
2703 else if (opc == 4)
2704 {
2705 TRACE_INSN (cpu, "BITCLR (R%i, %s);", dst, uimm_str);
2706 if (INSN_LEN == 8)
2707 illegal_instruction_combination (cpu);
2708 SET_DREG (dst, DREG (dst) & ~(1 << uimm));
2709 setflags_logical (cpu, DREG (dst));
2710 }
2711 else if (opc == 5)
2712 {
2713 TRACE_INSN (cpu, "R%i >>>= %s;", dst, uimm_str);
2714 if (INSN_LEN == 8)
2715 illegal_instruction_combination (cpu);
2716 SET_DREG (dst, ashiftrt (cpu, DREG (dst), uimm, 32));
2717 }
2718 else if (opc == 6)
2719 {
2720 TRACE_INSN (cpu, "R%i >>= %s;", dst, uimm_str);
2721 if (INSN_LEN == 8)
2722 illegal_instruction_combination (cpu);
2723 SET_DREG (dst, lshiftrt (cpu, DREG (dst), uimm, 32));
2724 }
2725 else if (opc == 7)
2726 {
2727 TRACE_INSN (cpu, "R%i <<= %s;", dst, uimm_str);
2728 if (INSN_LEN == 8)
2729 illegal_instruction_combination (cpu);
2730 SET_DREG (dst, lshift (cpu, DREG (dst), uimm, 32, 0));
2731 }
2732 }
2733
2734 static void
decode_COMP3op_0(SIM_CPU * cpu,bu16 iw0)2735 decode_COMP3op_0 (SIM_CPU *cpu, bu16 iw0)
2736 {
2737 /* COMP3op
2738 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2739 | 0 | 1 | 0 | 1 |.opc.......|.dst.......|.src1......|.src0......|
2740 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2741 int opc = ((iw0 >> COMP3op_opc_bits) & COMP3op_opc_mask);
2742 int dst = ((iw0 >> COMP3op_dst_bits) & COMP3op_dst_mask);
2743 int src0 = ((iw0 >> COMP3op_src0_bits) & COMP3op_src0_mask);
2744 int src1 = ((iw0 >> COMP3op_src1_bits) & COMP3op_src1_mask);
2745
2746 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_COMP3op);
2747 TRACE_EXTRACT (cpu, "%s: opc:%i dst:%i src1:%i src0:%i",
2748 __func__, opc, dst, src1, src0);
2749
2750 if (opc == 0)
2751 {
2752 TRACE_INSN (cpu, "R%i = R%i + R%i;", dst, src0, src1);
2753 SET_DREG (dst, add32 (cpu, DREG (src0), DREG (src1), 1, 0));
2754 }
2755 else if (opc == 1)
2756 {
2757 TRACE_INSN (cpu, "R%i = R%i - R%i;", dst, src0, src1);
2758 SET_DREG (dst, sub32 (cpu, DREG (src0), DREG (src1), 1, 0, 0));
2759 }
2760 else if (opc == 2)
2761 {
2762 TRACE_INSN (cpu, "R%i = R%i & R%i;", dst, src0, src1);
2763 SET_DREG (dst, DREG (src0) & DREG (src1));
2764 setflags_logical (cpu, DREG (dst));
2765 }
2766 else if (opc == 3)
2767 {
2768 TRACE_INSN (cpu, "R%i = R%i | R%i;", dst, src0, src1);
2769 SET_DREG (dst, DREG (src0) | DREG (src1));
2770 setflags_logical (cpu, DREG (dst));
2771 }
2772 else if (opc == 4)
2773 {
2774 TRACE_INSN (cpu, "R%i = R%i ^ R%i;", dst, src0, src1);
2775 SET_DREG (dst, DREG (src0) ^ DREG (src1));
2776 setflags_logical (cpu, DREG (dst));
2777 }
2778 else
2779 {
2780 int shift = opc - 5;
2781 const char *dst_name = get_preg_name (dst);
2782 const char *src0_name = get_preg_name (src0);
2783 const char *src1_name = get_preg_name (src1);
2784
2785 /* If src0 == src1 this is disassembled as a shift by 1, but this
2786 distinction doesn't matter for our purposes. */
2787 if (shift)
2788 TRACE_INSN (cpu, "%s = (%s + %s) << %#x;",
2789 dst_name, src0_name, src1_name, shift);
2790 else
2791 TRACE_INSN (cpu, "%s = %s + %s",
2792 dst_name, src0_name, src1_name);
2793 SET_PREG (dst, PREG (src0) + (PREG (src1) << shift));
2794 }
2795 }
2796
2797 static void
decode_COMPI2opD_0(SIM_CPU * cpu,bu16 iw0)2798 decode_COMPI2opD_0 (SIM_CPU *cpu, bu16 iw0)
2799 {
2800 /* COMPI2opD
2801 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2802 | 0 | 1 | 1 | 0 | 0 |.op|..src......................|.dst.......|
2803 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2804 int op = ((iw0 >> COMPI2opD_op_bits) & COMPI2opD_op_mask);
2805 int dst = ((iw0 >> COMPI2opD_dst_bits) & COMPI2opD_dst_mask);
2806 int src = ((iw0 >> COMPI2opD_src_bits) & COMPI2opD_src_mask);
2807 int imm = imm7 (src);
2808
2809 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_COMPI2opD);
2810 TRACE_EXTRACT (cpu, "%s: op:%i src:%i dst:%i", __func__, op, src, dst);
2811 TRACE_DECODE (cpu, "%s: imm7:%#x", __func__, imm);
2812
2813 if (op == 0)
2814 {
2815 TRACE_INSN (cpu, "R%i = %s (X);", dst, imm7_str (imm));
2816 SET_DREG (dst, imm);
2817 }
2818 else if (op == 1)
2819 {
2820 TRACE_INSN (cpu, "R%i += %s;", dst, imm7_str (imm));
2821 SET_DREG (dst, add32 (cpu, DREG (dst), imm, 1, 0));
2822 }
2823 }
2824
2825 static void
decode_COMPI2opP_0(SIM_CPU * cpu,bu16 iw0)2826 decode_COMPI2opP_0 (SIM_CPU *cpu, bu16 iw0)
2827 {
2828 /* COMPI2opP
2829 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2830 | 0 | 1 | 1 | 0 | 1 |.op|.src.......................|.dst.......|
2831 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2832 int op = ((iw0 >> COMPI2opP_op_bits) & COMPI2opP_op_mask);
2833 int src = ((iw0 >> COMPI2opP_src_bits) & COMPI2opP_src_mask);
2834 int dst = ((iw0 >> COMPI2opP_dst_bits) & COMPI2opP_dst_mask);
2835 int imm = imm7 (src);
2836 const char *dst_name = get_preg_name (dst);
2837
2838 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_COMPI2opP);
2839 TRACE_EXTRACT (cpu, "%s: op:%i src:%i dst:%i", __func__, op, src, dst);
2840 TRACE_DECODE (cpu, "%s: imm:%#x", __func__, imm);
2841
2842 if (op == 0)
2843 {
2844 TRACE_INSN (cpu, "%s = %s;", dst_name, imm7_str (imm));
2845 SET_PREG (dst, imm);
2846 }
2847 else if (op == 1)
2848 {
2849 TRACE_INSN (cpu, "%s += %s;", dst_name, imm7_str (imm));
2850 SET_PREG (dst, PREG (dst) + imm);
2851 }
2852 }
2853
2854 static void
decode_LDSTpmod_0(SIM_CPU * cpu,bu16 iw0)2855 decode_LDSTpmod_0 (SIM_CPU *cpu, bu16 iw0)
2856 {
2857 /* LDSTpmod
2858 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2859 | 1 | 0 | 0 | 0 |.W.|.aop...|.reg.......|.idx.......|.ptr.......|
2860 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2861 int W = ((iw0 >> LDSTpmod_W_bits) & LDSTpmod_W_mask);
2862 int aop = ((iw0 >> LDSTpmod_aop_bits) & LDSTpmod_aop_mask);
2863 int idx = ((iw0 >> LDSTpmod_idx_bits) & LDSTpmod_idx_mask);
2864 int ptr = ((iw0 >> LDSTpmod_ptr_bits) & LDSTpmod_ptr_mask);
2865 int reg = ((iw0 >> LDSTpmod_reg_bits) & LDSTpmod_reg_mask);
2866 const char *ptr_name = get_preg_name (ptr);
2867 const char *idx_name = get_preg_name (idx);
2868 bu32 addr, val;
2869
2870 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_LDSTpmod);
2871 TRACE_EXTRACT (cpu, "%s: W:%i aop:%i reg:%i idx:%i ptr:%i",
2872 __func__, W, aop, reg, idx, ptr);
2873
2874 if (aop == 1 && W == 0 && idx == ptr)
2875 {
2876 TRACE_INSN (cpu, "R%i.L = W[%s];", reg, ptr_name);
2877 addr = PREG (ptr);
2878 val = GET_WORD (addr);
2879 STORE (DREG (reg), (DREG (reg) & 0xFFFF0000) | val);
2880 }
2881 else if (aop == 2 && W == 0 && idx == ptr)
2882 {
2883 TRACE_INSN (cpu, "R%i.H = W[%s];", reg, ptr_name);
2884 addr = PREG (ptr);
2885 val = GET_WORD (addr);
2886 STORE (DREG (reg), (DREG (reg) & 0xFFFF) | (val << 16));
2887 }
2888 else if (aop == 1 && W == 1 && idx == ptr)
2889 {
2890 TRACE_INSN (cpu, "W[%s] = R%i.L;", ptr_name, reg);
2891 addr = PREG (ptr);
2892 PUT_WORD (addr, DREG (reg));
2893 }
2894 else if (aop == 2 && W == 1 && idx == ptr)
2895 {
2896 TRACE_INSN (cpu, "W[%s] = R%i.H;", ptr_name, reg);
2897 addr = PREG (ptr);
2898 PUT_WORD (addr, DREG (reg) >> 16);
2899 }
2900 else if (aop == 0 && W == 0)
2901 {
2902 TRACE_INSN (cpu, "R%i = [%s ++ %s];", reg, ptr_name, idx_name);
2903 addr = PREG (ptr);
2904 val = GET_LONG (addr);
2905 STORE (DREG (reg), val);
2906 if (ptr != idx)
2907 STORE (PREG (ptr), addr + PREG (idx));
2908 }
2909 else if (aop == 1 && W == 0)
2910 {
2911 TRACE_INSN (cpu, "R%i.L = W[%s ++ %s];", reg, ptr_name, idx_name);
2912 addr = PREG (ptr);
2913 val = GET_WORD (addr);
2914 STORE (DREG (reg), (DREG (reg) & 0xFFFF0000) | val);
2915 if (ptr != idx)
2916 STORE (PREG (ptr), addr + PREG (idx));
2917 }
2918 else if (aop == 2 && W == 0)
2919 {
2920 TRACE_INSN (cpu, "R%i.H = W[%s ++ %s];", reg, ptr_name, idx_name);
2921 addr = PREG (ptr);
2922 val = GET_WORD (addr);
2923 STORE (DREG (reg), (DREG (reg) & 0xFFFF) | (val << 16));
2924 if (ptr != idx)
2925 STORE (PREG (ptr), addr + PREG (idx));
2926 }
2927 else if (aop == 3 && W == 0)
2928 {
2929 TRACE_INSN (cpu, "R%i = W[%s ++ %s] (Z);", reg, ptr_name, idx_name);
2930 addr = PREG (ptr);
2931 val = GET_WORD (addr);
2932 STORE (DREG (reg), val);
2933 if (ptr != idx)
2934 STORE (PREG (ptr), addr + PREG (idx));
2935 }
2936 else if (aop == 3 && W == 1)
2937 {
2938 TRACE_INSN (cpu, "R%i = W[%s ++ %s] (X);", reg, ptr_name, idx_name);
2939 addr = PREG (ptr);
2940 val = GET_WORD (addr);
2941 STORE (DREG (reg), (bs32) (bs16) val);
2942 if (ptr != idx)
2943 STORE (PREG (ptr), addr + PREG (idx));
2944 }
2945 else if (aop == 0 && W == 1)
2946 {
2947 TRACE_INSN (cpu, "[%s ++ %s] = R%i;", ptr_name, idx_name, reg);
2948 addr = PREG (ptr);
2949 PUT_LONG (addr, DREG (reg));
2950 if (ptr != idx)
2951 STORE (PREG (ptr), addr + PREG (idx));
2952 }
2953 else if (aop == 1 && W == 1)
2954 {
2955 TRACE_INSN (cpu, "W[%s ++ %s] = R%i.L;", ptr_name, idx_name, reg);
2956 addr = PREG (ptr);
2957 PUT_WORD (addr, DREG (reg));
2958 if (ptr != idx)
2959 STORE (PREG (ptr), addr + PREG (idx));
2960 }
2961 else if (aop == 2 && W == 1)
2962 {
2963 TRACE_INSN (cpu, "W[%s ++ %s] = R%i.H;", ptr_name, idx_name, reg);
2964 addr = PREG (ptr);
2965 PUT_WORD (addr, DREG (reg) >> 16);
2966 if (ptr != idx)
2967 STORE (PREG (ptr), addr + PREG (idx));
2968 }
2969 else
2970 illegal_instruction (cpu);
2971 }
2972
2973 static void
decode_dagMODim_0(SIM_CPU * cpu,bu16 iw0)2974 decode_dagMODim_0 (SIM_CPU *cpu, bu16 iw0)
2975 {
2976 /* dagMODim
2977 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
2978 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 0 |.br| 1 | 1 |.op|.m.....|.i.....|
2979 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
2980 int i = ((iw0 >> DagMODim_i_bits) & DagMODim_i_mask);
2981 int m = ((iw0 >> DagMODim_m_bits) & DagMODim_m_mask);
2982 int br = ((iw0 >> DagMODim_br_bits) & DagMODim_br_mask);
2983 int op = ((iw0 >> DagMODim_op_bits) & DagMODim_op_mask);
2984
2985 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_dagMODim);
2986 TRACE_EXTRACT (cpu, "%s: br:%i op:%i m:%i i:%i", __func__, br, op, m, i);
2987
2988 if (op == 0 && br == 1)
2989 {
2990 TRACE_INSN (cpu, "I%i += M%i (BREV);", i, m);
2991 SET_IREG (i, add_brev (IREG (i), MREG (m)));
2992 }
2993 else if (op == 0)
2994 {
2995 TRACE_INSN (cpu, "I%i += M%i;", i, m);
2996 dagadd (cpu, i, MREG (m));
2997 }
2998 else if (op == 1 && br == 0)
2999 {
3000 TRACE_INSN (cpu, "I%i -= M%i;", i, m);
3001 dagsub (cpu, i, MREG (m));
3002 }
3003 else
3004 illegal_instruction (cpu);
3005 }
3006
3007 static void
decode_dagMODik_0(SIM_CPU * cpu,bu16 iw0)3008 decode_dagMODik_0 (SIM_CPU *cpu, bu16 iw0)
3009 {
3010 /* dagMODik
3011 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
3012 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 0 |.op....|.i.....|
3013 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
3014 int i = ((iw0 >> DagMODik_i_bits) & DagMODik_i_mask);
3015 int op = ((iw0 >> DagMODik_op_bits) & DagMODik_op_mask);
3016
3017 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_dagMODik);
3018 TRACE_EXTRACT (cpu, "%s: op:%i i:%i", __func__, op, i);
3019
3020 if (op == 0)
3021 {
3022 TRACE_INSN (cpu, "I%i += 2;", i);
3023 dagadd (cpu, i, 2);
3024 }
3025 else if (op == 1)
3026 {
3027 TRACE_INSN (cpu, "I%i -= 2;", i);
3028 dagsub (cpu, i, 2);
3029 }
3030 else if (op == 2)
3031 {
3032 TRACE_INSN (cpu, "I%i += 4;", i);
3033 dagadd (cpu, i, 4);
3034 }
3035 else if (op == 3)
3036 {
3037 TRACE_INSN (cpu, "I%i -= 4;", i);
3038 dagsub (cpu, i, 4);
3039 }
3040 else
3041 illegal_instruction (cpu);
3042 }
3043
3044 static void
decode_dspLDST_0(SIM_CPU * cpu,bu16 iw0)3045 decode_dspLDST_0 (SIM_CPU *cpu, bu16 iw0)
3046 {
3047 /* dspLDST
3048 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
3049 | 1 | 0 | 0 | 1 | 1 | 1 |.W.|.aop...|.m.....|.i.....|.reg.......|
3050 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
3051 int i = ((iw0 >> DspLDST_i_bits) & DspLDST_i_mask);
3052 int m = ((iw0 >> DspLDST_m_bits) & DspLDST_m_mask);
3053 int W = ((iw0 >> DspLDST_W_bits) & DspLDST_W_mask);
3054 int aop = ((iw0 >> DspLDST_aop_bits) & DspLDST_aop_mask);
3055 int reg = ((iw0 >> DspLDST_reg_bits) & DspLDST_reg_mask);
3056 bu32 addr;
3057
3058 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_dspLDST);
3059 TRACE_EXTRACT (cpu, "%s: aop:%i m:%i i:%i reg:%i", __func__, aop, m, i, reg);
3060
3061 if (aop == 0 && W == 0 && m == 0)
3062 {
3063 TRACE_INSN (cpu, "R%i = [I%i++];", reg, i);
3064 addr = IREG (i);
3065 if (DIS_ALGN_EXPT & 0x1)
3066 addr &= ~3;
3067 dagadd (cpu, i, 4);
3068 STORE (DREG (reg), GET_LONG (addr));
3069 }
3070 else if (aop == 0 && W == 0 && m == 1)
3071 {
3072 TRACE_INSN (cpu, "R%i.L = W[I%i++];", reg, i);
3073 addr = IREG (i);
3074 dagadd (cpu, i, 2);
3075 STORE (DREG (reg), (DREG (reg) & 0xFFFF0000) | GET_WORD (addr));
3076 }
3077 else if (aop == 0 && W == 0 && m == 2)
3078 {
3079 TRACE_INSN (cpu, "R%i.H = W[I%i++];", reg, i);
3080 addr = IREG (i);
3081 dagadd (cpu, i, 2);
3082 STORE (DREG (reg), (DREG (reg) & 0xFFFF) | (GET_WORD (addr) << 16));
3083 }
3084 else if (aop == 1 && W == 0 && m == 0)
3085 {
3086 TRACE_INSN (cpu, "R%i = [I%i--];", reg, i);
3087 addr = IREG (i);
3088 if (DIS_ALGN_EXPT & 0x1)
3089 addr &= ~3;
3090 dagsub (cpu, i, 4);
3091 STORE (DREG (reg), GET_LONG (addr));
3092 }
3093 else if (aop == 1 && W == 0 && m == 1)
3094 {
3095 TRACE_INSN (cpu, "R%i.L = W[I%i--];", reg, i);
3096 addr = IREG (i);
3097 dagsub (cpu, i, 2);
3098 STORE (DREG (reg), (DREG (reg) & 0xFFFF0000) | GET_WORD (addr));
3099 }
3100 else if (aop == 1 && W == 0 && m == 2)
3101 {
3102 TRACE_INSN (cpu, "R%i.H = W[I%i--];", reg, i);
3103 addr = IREG (i);
3104 dagsub (cpu, i, 2);
3105 STORE (DREG (reg), (DREG (reg) & 0xFFFF) | (GET_WORD (addr) << 16));
3106 }
3107 else if (aop == 2 && W == 0 && m == 0)
3108 {
3109 TRACE_INSN (cpu, "R%i = [I%i];", reg, i);
3110 addr = IREG (i);
3111 if (DIS_ALGN_EXPT & 0x1)
3112 addr &= ~3;
3113 STORE (DREG (reg), GET_LONG (addr));
3114 }
3115 else if (aop == 2 && W == 0 && m == 1)
3116 {
3117 TRACE_INSN (cpu, "R%i.L = W[I%i];", reg, i);
3118 addr = IREG (i);
3119 STORE (DREG (reg), (DREG (reg) & 0xFFFF0000) | GET_WORD (addr));
3120 }
3121 else if (aop == 2 && W == 0 && m == 2)
3122 {
3123 TRACE_INSN (cpu, "R%i.H = W[I%i];", reg, i);
3124 addr = IREG (i);
3125 STORE (DREG (reg), (DREG (reg) & 0xFFFF) | (GET_WORD (addr) << 16));
3126 }
3127 else if (aop == 0 && W == 1 && m == 0)
3128 {
3129 TRACE_INSN (cpu, "[I%i++] = R%i;", i, reg);
3130 addr = IREG (i);
3131 dagadd (cpu, i, 4);
3132 PUT_LONG (addr, DREG (reg));
3133 }
3134 else if (aop == 0 && W == 1 && m == 1)
3135 {
3136 TRACE_INSN (cpu, "W[I%i++] = R%i.L;", i, reg);
3137 addr = IREG (i);
3138 dagadd (cpu, i, 2);
3139 PUT_WORD (addr, DREG (reg));
3140 }
3141 else if (aop == 0 && W == 1 && m == 2)
3142 {
3143 TRACE_INSN (cpu, "W[I%i++] = R%i.H;", i, reg);
3144 addr = IREG (i);
3145 dagadd (cpu, i, 2);
3146 PUT_WORD (addr, DREG (reg) >> 16);
3147 }
3148 else if (aop == 1 && W == 1 && m == 0)
3149 {
3150 TRACE_INSN (cpu, "[I%i--] = R%i;", i, reg);
3151 addr = IREG (i);
3152 dagsub (cpu, i, 4);
3153 PUT_LONG (addr, DREG (reg));
3154 }
3155 else if (aop == 1 && W == 1 && m == 1)
3156 {
3157 TRACE_INSN (cpu, "W[I%i--] = R%i.L;", i, reg);
3158 addr = IREG (i);
3159 dagsub (cpu, i, 2);
3160 PUT_WORD (addr, DREG (reg));
3161 }
3162 else if (aop == 1 && W == 1 && m == 2)
3163 {
3164 TRACE_INSN (cpu, "W[I%i--] = R%i.H;", i, reg);
3165 addr = IREG (i);
3166 dagsub (cpu, i, 2);
3167 PUT_WORD (addr, DREG (reg) >> 16);
3168 }
3169 else if (aop == 2 && W == 1 && m == 0)
3170 {
3171 TRACE_INSN (cpu, "[I%i] = R%i;", i, reg);
3172 addr = IREG (i);
3173 PUT_LONG (addr, DREG (reg));
3174 }
3175 else if (aop == 2 && W == 1 && m == 1)
3176 {
3177 TRACE_INSN (cpu, "W[I%i] = R%i.L;", i, reg);
3178 addr = IREG (i);
3179 PUT_WORD (addr, DREG (reg));
3180 }
3181 else if (aop == 2 && W == 1 && m == 2)
3182 {
3183 TRACE_INSN (cpu, "W[I%i] = R%i.H;", i, reg);
3184 addr = IREG (i);
3185 PUT_WORD (addr, DREG (reg) >> 16);
3186 }
3187 else if (aop == 3 && W == 0)
3188 {
3189 TRACE_INSN (cpu, "R%i = [I%i ++ M%i];", reg, i, m);
3190 addr = IREG (i);
3191 if (DIS_ALGN_EXPT & 0x1)
3192 addr &= ~3;
3193 dagadd (cpu, i, MREG (m));
3194 STORE (DREG (reg), GET_LONG (addr));
3195 }
3196 else if (aop == 3 && W == 1)
3197 {
3198 TRACE_INSN (cpu, "[I%i ++ M%i] = R%i;", i, m, reg);
3199 addr = IREG (i);
3200 dagadd (cpu, i, MREG (m));
3201 PUT_LONG (addr, DREG (reg));
3202 }
3203 else
3204 illegal_instruction (cpu);
3205 }
3206
3207 static void
decode_LDST_0(SIM_CPU * cpu,bu16 iw0)3208 decode_LDST_0 (SIM_CPU *cpu, bu16 iw0)
3209 {
3210 /* LDST
3211 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
3212 | 1 | 0 | 0 | 1 |.sz....|.W.|.aop...|.Z.|.ptr.......|.reg.......|
3213 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
3214 int Z = ((iw0 >> LDST_Z_bits) & LDST_Z_mask);
3215 int W = ((iw0 >> LDST_W_bits) & LDST_W_mask);
3216 int sz = ((iw0 >> LDST_sz_bits) & LDST_sz_mask);
3217 int aop = ((iw0 >> LDST_aop_bits) & LDST_aop_mask);
3218 int reg = ((iw0 >> LDST_reg_bits) & LDST_reg_mask);
3219 int ptr = ((iw0 >> LDST_ptr_bits) & LDST_ptr_mask);
3220 const char * const posts[] = { "++", "--", "" };
3221 const char *post = posts[aop];
3222 const char *ptr_name = get_preg_name (ptr);
3223
3224 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_LDST);
3225 TRACE_EXTRACT (cpu, "%s: sz:%i W:%i aop:%i Z:%i ptr:%i reg:%i",
3226 __func__, sz, W, aop, Z, ptr, reg);
3227
3228 if (aop == 3)
3229 illegal_instruction (cpu);
3230
3231 if (W == 0)
3232 {
3233 if (sz == 0 && Z == 0)
3234 {
3235 TRACE_INSN (cpu, "R%i = [%s%s];", reg, ptr_name, post);
3236 SET_DREG (reg, GET_LONG (PREG (ptr)));
3237 }
3238 else if (sz == 0 && Z == 1)
3239 {
3240 TRACE_INSN (cpu, "%s = [%s%s];", get_preg_name (reg), ptr_name, post);
3241 if (aop < 2 && ptr == reg)
3242 illegal_instruction_combination (cpu);
3243 SET_PREG (reg, GET_LONG (PREG (ptr)));
3244 }
3245 else if (sz == 1 && Z == 0)
3246 {
3247 TRACE_INSN (cpu, "R%i = W[%s%s] (Z);", reg, ptr_name, post);
3248 SET_DREG (reg, GET_WORD (PREG (ptr)));
3249 }
3250 else if (sz == 1 && Z == 1)
3251 {
3252 TRACE_INSN (cpu, "R%i = W[%s%s] (X);", reg, ptr_name, post);
3253 SET_DREG (reg, (bs32) (bs16) GET_WORD (PREG (ptr)));
3254 }
3255 else if (sz == 2 && Z == 0)
3256 {
3257 TRACE_INSN (cpu, "R%i = B[%s%s] (Z);", reg, ptr_name, post);
3258 SET_DREG (reg, GET_BYTE (PREG (ptr)));
3259 }
3260 else if (sz == 2 && Z == 1)
3261 {
3262 TRACE_INSN (cpu, "R%i = B[%s%s] (X);", reg, ptr_name, post);
3263 SET_DREG (reg, (bs32) (bs8) GET_BYTE (PREG (ptr)));
3264 }
3265 else
3266 illegal_instruction (cpu);
3267 }
3268 else
3269 {
3270 if (sz == 0 && Z == 0)
3271 {
3272 TRACE_INSN (cpu, "[%s%s] = R%i;", ptr_name, post, reg);
3273 PUT_LONG (PREG (ptr), DREG (reg));
3274 }
3275 else if (sz == 0 && Z == 1)
3276 {
3277 TRACE_INSN (cpu, "[%s%s] = %s;", ptr_name, post, get_preg_name (reg));
3278 PUT_LONG (PREG (ptr), PREG (reg));
3279 }
3280 else if (sz == 1 && Z == 0)
3281 {
3282 TRACE_INSN (cpu, "W[%s%s] = R%i;", ptr_name, post, reg);
3283 PUT_WORD (PREG (ptr), DREG (reg));
3284 }
3285 else if (sz == 2 && Z == 0)
3286 {
3287 TRACE_INSN (cpu, "B[%s%s] = R%i;", ptr_name, post, reg);
3288 PUT_BYTE (PREG (ptr), DREG (reg));
3289 }
3290 else
3291 illegal_instruction (cpu);
3292 }
3293
3294 if (aop == 0)
3295 SET_PREG (ptr, PREG (ptr) + (1 << (2 - sz)));
3296 if (aop == 1)
3297 SET_PREG (ptr, PREG (ptr) - (1 << (2 - sz)));
3298 }
3299
3300 static void
decode_LDSTiiFP_0(SIM_CPU * cpu,bu16 iw0)3301 decode_LDSTiiFP_0 (SIM_CPU *cpu, bu16 iw0)
3302 {
3303 /* LDSTiiFP
3304 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
3305 | 1 | 0 | 1 | 1 | 1 | 0 |.W.|.offset............|.reg...........|
3306 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
3307 /* This isn't exactly a grp:reg as this insn only supports Dregs & Pregs,
3308 but for our usage, its functionality the same thing. */
3309 int grp = ((iw0 >> 3) & 0x1);
3310 int reg = ((iw0 >> LDSTiiFP_reg_bits) & 0x7 /*LDSTiiFP_reg_mask*/);
3311 int offset = ((iw0 >> LDSTiiFP_offset_bits) & LDSTiiFP_offset_mask);
3312 int W = ((iw0 >> LDSTiiFP_W_bits) & LDSTiiFP_W_mask);
3313 bu32 imm = negimm5s4 (offset);
3314 bu32 ea = FPREG + imm;
3315 const char *imm_str = negimm5s4_str (offset);
3316 const char *reg_name = get_allreg_name (grp, reg);
3317
3318 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_LDSTiiFP);
3319 TRACE_EXTRACT (cpu, "%s: W:%i offset:%#x grp:%i reg:%i", __func__,
3320 W, offset, grp, reg);
3321 TRACE_DECODE (cpu, "%s: negimm5s4:%#x", __func__, imm);
3322
3323 if (W == 0)
3324 {
3325 TRACE_INSN (cpu, "%s = [FP + %s];", reg_name, imm_str);
3326 reg_write (cpu, grp, reg, GET_LONG (ea));
3327 }
3328 else
3329 {
3330 TRACE_INSN (cpu, "[FP + %s] = %s;", imm_str, reg_name);
3331 PUT_LONG (ea, reg_read (cpu, grp, reg));
3332 }
3333 }
3334
3335 static void
decode_LDSTii_0(SIM_CPU * cpu,bu16 iw0)3336 decode_LDSTii_0 (SIM_CPU *cpu, bu16 iw0)
3337 {
3338 /* LDSTii
3339 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
3340 | 1 | 0 | 1 |.W.|.op....|.offset........|.ptr.......|.reg.......|
3341 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
3342 int reg = ((iw0 >> LDSTii_reg_bit) & LDSTii_reg_mask);
3343 int ptr = ((iw0 >> LDSTii_ptr_bit) & LDSTii_ptr_mask);
3344 int offset = ((iw0 >> LDSTii_offset_bit) & LDSTii_offset_mask);
3345 int op = ((iw0 >> LDSTii_op_bit) & LDSTii_op_mask);
3346 int W = ((iw0 >> LDSTii_W_bit) & LDSTii_W_mask);
3347 bu32 imm, ea;
3348 const char *imm_str;
3349 const char *ptr_name = get_preg_name (ptr);
3350
3351 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_LDSTii);
3352 TRACE_EXTRACT (cpu, "%s: W:%i op:%i offset:%#x ptr:%i reg:%i",
3353 __func__, W, op, offset, ptr, reg);
3354
3355 if (op == 0 || op == 3)
3356 imm = uimm4s4 (offset), imm_str = uimm4s4_str (offset);
3357 else
3358 imm = uimm4s2 (offset), imm_str = uimm4s2_str (offset);
3359 ea = PREG (ptr) + imm;
3360
3361 TRACE_DECODE (cpu, "%s: uimm4s4/uimm4s2:%#x", __func__, imm);
3362
3363 if (W == 1 && op == 2)
3364 illegal_instruction (cpu);
3365
3366 if (W == 0)
3367 {
3368 if (op == 0)
3369 {
3370 TRACE_INSN (cpu, "R%i = [%s + %s];", reg, ptr_name, imm_str);
3371 SET_DREG (reg, GET_LONG (ea));
3372 }
3373 else if (op == 1)
3374 {
3375 TRACE_INSN (cpu, "R%i = W[%s + %s] (Z);", reg, ptr_name, imm_str);
3376 SET_DREG (reg, GET_WORD (ea));
3377 }
3378 else if (op == 2)
3379 {
3380 TRACE_INSN (cpu, "R%i = W[%s + %s] (X);", reg, ptr_name, imm_str);
3381 SET_DREG (reg, (bs32) (bs16) GET_WORD (ea));
3382 }
3383 else if (op == 3)
3384 {
3385 TRACE_INSN (cpu, "%s = [%s + %s];",
3386 get_preg_name (reg), ptr_name, imm_str);
3387 SET_PREG (reg, GET_LONG (ea));
3388 }
3389 }
3390 else
3391 {
3392 if (op == 0)
3393 {
3394 TRACE_INSN (cpu, "[%s + %s] = R%i;", ptr_name, imm_str, reg);
3395 PUT_LONG (ea, DREG (reg));
3396 }
3397 else if (op == 1)
3398 {
3399 TRACE_INSN (cpu, "W[%s + %s] = R%i;", ptr_name, imm_str, reg);
3400 PUT_WORD (ea, DREG (reg));
3401 }
3402 else if (op == 3)
3403 {
3404 TRACE_INSN (cpu, "[%s + %s] = %s;",
3405 ptr_name, imm_str, get_preg_name (reg));
3406 PUT_LONG (ea, PREG (reg));
3407 }
3408 }
3409 }
3410
3411 static void
decode_LoopSetup_0(SIM_CPU * cpu,bu16 iw0,bu16 iw1,bu32 pc)3412 decode_LoopSetup_0 (SIM_CPU *cpu, bu16 iw0, bu16 iw1, bu32 pc)
3413 {
3414 /* LoopSetup
3415 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
3416 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |.rop...|.c.|.soffset.......|
3417 |.reg...........| - | - |.eoffset...............................|
3418 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
3419 int c = ((iw0 >> (LoopSetup_c_bits - 16)) & LoopSetup_c_mask);
3420 int reg = ((iw1 >> LoopSetup_reg_bits) & LoopSetup_reg_mask);
3421 int rop = ((iw0 >> (LoopSetup_rop_bits - 16)) & LoopSetup_rop_mask);
3422 int soffset = ((iw0 >> (LoopSetup_soffset_bits - 16)) & LoopSetup_soffset_mask);
3423 int eoffset = ((iw1 >> LoopSetup_eoffset_bits) & LoopSetup_eoffset_mask);
3424 int spcrel = pcrel4 (soffset);
3425 int epcrel = lppcrel10 (eoffset);
3426
3427 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_LoopSetup);
3428 TRACE_EXTRACT (cpu, "%s: rop:%i c:%i soffset:%i reg:%i eoffset:%i",
3429 __func__, rop, c, soffset, reg, eoffset);
3430 TRACE_DECODE (cpu, "%s: s_pcrel4:%#x e_lppcrel10:%#x",
3431 __func__, spcrel, epcrel);
3432
3433 if (reg > 7)
3434 illegal_instruction (cpu);
3435
3436 if (INSN_LEN == 8)
3437 illegal_instruction_combination (cpu);
3438
3439 if (rop == 0)
3440 {
3441 TRACE_INSN (cpu, "LSETUP (%#x, %#x) LC%i;", spcrel, epcrel, c);
3442 }
3443 else if (rop == 1 && reg <= 7)
3444 {
3445 TRACE_INSN (cpu, "LSETUP (%#x, %#x) LC%i = %s;",
3446 spcrel, epcrel, c, get_preg_name (reg));
3447 SET_LCREG (c, PREG (reg));
3448 }
3449 else if (rop == 3 && reg <= 7)
3450 {
3451 TRACE_INSN (cpu, "LSETUP (%#x, %#x) LC%i = %s >> 1;",
3452 spcrel, epcrel, c, get_preg_name (reg));
3453 SET_LCREG (c, PREG (reg) >> 1);
3454 }
3455 else
3456 illegal_instruction (cpu);
3457
3458 SET_LTREG (c, pc + spcrel);
3459 SET_LBREG (c, pc + epcrel);
3460 }
3461
3462 static void
decode_LDIMMhalf_0(SIM_CPU * cpu,bu16 iw0,bu16 iw1)3463 decode_LDIMMhalf_0 (SIM_CPU *cpu, bu16 iw0, bu16 iw1)
3464 {
3465 /* LDIMMhalf
3466 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
3467 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 |.Z.|.H.|.S.|.grp...|.reg.......|
3468 |.hword.........................................................|
3469 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
3470 int H = ((iw0 >> (LDIMMhalf_H_bits - 16)) & LDIMMhalf_H_mask);
3471 int Z = ((iw0 >> (LDIMMhalf_Z_bits - 16)) & LDIMMhalf_Z_mask);
3472 int S = ((iw0 >> (LDIMMhalf_S_bits - 16)) & LDIMMhalf_S_mask);
3473 int reg = ((iw0 >> (LDIMMhalf_reg_bits - 16)) & LDIMMhalf_reg_mask);
3474 int grp = ((iw0 >> (LDIMMhalf_grp_bits - 16)) & LDIMMhalf_grp_mask);
3475 int hword = ((iw1 >> LDIMMhalf_hword_bits) & LDIMMhalf_hword_mask);
3476 bu32 val;
3477 const char *val_str;
3478 const char *reg_name = get_allreg_name (grp, reg);
3479
3480 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_LDIMMhalf);
3481 TRACE_EXTRACT (cpu, "%s: Z:%i H:%i S:%i grp:%i reg:%i hword:%#x",
3482 __func__, Z, H, S, grp, reg, hword);
3483
3484 if (INSN_LEN == 8)
3485 illegal_instruction_combination (cpu);
3486
3487 if (S == 1)
3488 val = imm16 (hword), val_str = imm16_str (hword);
3489 else
3490 val = luimm16 (hword), val_str = luimm16_str (hword);
3491
3492 if (H == 0 && S == 1 && Z == 0)
3493 {
3494 TRACE_INSN (cpu, "%s = %s (X);", reg_name, val_str);
3495 }
3496 else if (H == 0 && S == 0 && Z == 1)
3497 {
3498 TRACE_INSN (cpu, "%s = %s (Z);", reg_name, val_str);
3499 }
3500 else if (H == 0 && S == 0 && Z == 0)
3501 {
3502 TRACE_INSN (cpu, "%s.L = %s;", reg_name, val_str);
3503 val = REG_H_L (reg_read (cpu, grp, reg), val);
3504 }
3505 else if (H == 1 && S == 0 && Z == 0)
3506 {
3507 TRACE_INSN (cpu, "%s.H = %s;", reg_name, val_str);
3508 val = REG_H_L (val << 16, reg_read (cpu, grp, reg));
3509 }
3510 else
3511 illegal_instruction (cpu);
3512
3513 reg_write (cpu, grp, reg, val);
3514 }
3515
3516 static void
decode_CALLa_0(SIM_CPU * cpu,bu16 iw0,bu16 iw1,bu32 pc)3517 decode_CALLa_0 (SIM_CPU *cpu, bu16 iw0, bu16 iw1, bu32 pc)
3518 {
3519 /* CALLa
3520 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
3521 | 1 | 1 | 1 | 0 | 0 | 0 | 1 |.S.|.msw...........................|
3522 |.lsw...........................................................|
3523 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
3524 int S = ((iw0 >> (CALLa_S_bits - 16)) & CALLa_S_mask);
3525 int lsw = ((iw1 >> 0) & 0xffff);
3526 int msw = ((iw0 >> 0) & 0xff);
3527 int pcrel = pcrel24 ((msw << 16) | lsw);
3528 bu32 newpc = pc + pcrel;
3529
3530 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_CALLa);
3531 TRACE_EXTRACT (cpu, "%s: S:%i msw:%#x lsw:%#x", __func__, S, msw, lsw);
3532 TRACE_DECODE (cpu, "%s: pcrel24:%#x", __func__, pcrel);
3533
3534 TRACE_INSN (cpu, "%s %#x;", S ? "CALL" : "JUMP.L", pcrel);
3535
3536 if (INSN_LEN == 8)
3537 illegal_instruction_combination (cpu);
3538
3539 if (S == 1)
3540 {
3541 TRACE_BRANCH (cpu, pc, newpc, -1, "CALL");
3542 SET_RETSREG (hwloop_get_next_pc (cpu, pc, 4));
3543 }
3544 else
3545 TRACE_BRANCH (cpu, pc, newpc, -1, "JUMP.L");
3546
3547 SET_PCREG (newpc);
3548 BFIN_CPU_STATE.did_jump = true;
3549 PROFILE_BRANCH_TAKEN (cpu);
3550 CYCLE_DELAY = 5;
3551 }
3552
3553 static void
decode_LDSTidxI_0(SIM_CPU * cpu,bu16 iw0,bu16 iw1)3554 decode_LDSTidxI_0 (SIM_CPU *cpu, bu16 iw0, bu16 iw1)
3555 {
3556 /* LDSTidxI
3557 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
3558 | 1 | 1 | 1 | 0 | 0 | 1 |.W.|.Z.|.sz....|.ptr.......|.reg.......|
3559 |.offset........................................................|
3560 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
3561 int Z = ((iw0 >> (LDSTidxI_Z_bits - 16)) & LDSTidxI_Z_mask);
3562 int W = ((iw0 >> (LDSTidxI_W_bits - 16)) & LDSTidxI_W_mask);
3563 int sz = ((iw0 >> (LDSTidxI_sz_bits - 16)) & LDSTidxI_sz_mask);
3564 int reg = ((iw0 >> (LDSTidxI_reg_bits - 16)) & LDSTidxI_reg_mask);
3565 int ptr = ((iw0 >> (LDSTidxI_ptr_bits - 16)) & LDSTidxI_ptr_mask);
3566 int offset = ((iw1 >> LDSTidxI_offset_bits) & LDSTidxI_offset_mask);
3567 const char *ptr_name = get_preg_name (ptr);
3568 bu32 imm_16s4 = imm16s4 (offset);
3569 bu32 imm_16s2 = imm16s2 (offset);
3570 bu32 imm_16 = imm16 (offset);
3571
3572 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_LDSTidxI);
3573 TRACE_EXTRACT (cpu, "%s: W:%i Z:%i sz:%i ptr:%i reg:%i offset:%#x",
3574 __func__, W, Z, sz, ptr, reg, offset);
3575
3576 if (sz == 3)
3577 illegal_instruction (cpu);
3578
3579 if (W == 0)
3580 {
3581 if (sz == 0 && Z == 0)
3582 {
3583 TRACE_INSN (cpu, "R%i = [%s + %s];",
3584 reg, ptr_name, imm16s4_str (offset));
3585 SET_DREG (reg, GET_LONG (PREG (ptr) + imm_16s4));
3586 }
3587 else if (sz == 0 && Z == 1)
3588 {
3589 TRACE_INSN (cpu, "%s = [%s + %s];",
3590 get_preg_name (reg), ptr_name, imm16s4_str (offset));
3591 SET_PREG (reg, GET_LONG (PREG (ptr) + imm_16s4));
3592 }
3593 else if (sz == 1 && Z == 0)
3594 {
3595 TRACE_INSN (cpu, "R%i = W[%s + %s] (Z);",
3596 reg, ptr_name, imm16s2_str (offset));
3597 SET_DREG (reg, GET_WORD (PREG (ptr) + imm_16s2));
3598 }
3599 else if (sz == 1 && Z == 1)
3600 {
3601 TRACE_INSN (cpu, "R%i = W[%s + %s] (X);",
3602 reg, ptr_name, imm16s2_str (offset));
3603 SET_DREG (reg, (bs32) (bs16) GET_WORD (PREG (ptr) + imm_16s2));
3604 }
3605 else if (sz == 2 && Z == 0)
3606 {
3607 TRACE_INSN (cpu, "R%i = B[%s + %s] (Z);",
3608 reg, ptr_name, imm16_str (offset));
3609 SET_DREG (reg, GET_BYTE (PREG (ptr) + imm_16));
3610 }
3611 else if (sz == 2 && Z == 1)
3612 {
3613 TRACE_INSN (cpu, "R%i = B[%s + %s] (X);",
3614 reg, ptr_name, imm16_str (offset));
3615 SET_DREG (reg, (bs32) (bs8) GET_BYTE (PREG (ptr) + imm_16));
3616 }
3617 }
3618 else
3619 {
3620 if (sz != 0 && Z != 0)
3621 illegal_instruction (cpu);
3622
3623 if (sz == 0 && Z == 0)
3624 {
3625 TRACE_INSN (cpu, "[%s + %s] = R%i;", ptr_name,
3626 imm16s4_str (offset), reg);
3627 PUT_LONG (PREG (ptr) + imm_16s4, DREG (reg));
3628 }
3629 else if (sz == 0 && Z == 1)
3630 {
3631 TRACE_INSN (cpu, "[%s + %s] = %s;",
3632 ptr_name, imm16s4_str (offset), get_preg_name (reg));
3633 PUT_LONG (PREG (ptr) + imm_16s4, PREG (reg));
3634 }
3635 else if (sz == 1 && Z == 0)
3636 {
3637 TRACE_INSN (cpu, "W[%s + %s] = R%i;",
3638 ptr_name, imm16s2_str (offset), reg);
3639 PUT_WORD (PREG (ptr) + imm_16s2, DREG (reg));
3640 }
3641 else if (sz == 2 && Z == 0)
3642 {
3643 TRACE_INSN (cpu, "B[%s + %s] = R%i;",
3644 ptr_name, imm16_str (offset), reg);
3645 PUT_BYTE (PREG (ptr) + imm_16, DREG (reg));
3646 }
3647 }
3648 }
3649
3650 static void
decode_linkage_0(SIM_CPU * cpu,bu16 iw0,bu16 iw1)3651 decode_linkage_0 (SIM_CPU *cpu, bu16 iw0, bu16 iw1)
3652 {
3653 /* linkage
3654 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
3655 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |.R.|
3656 |.framesize.....................................................|
3657 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
3658 int R = ((iw0 >> (Linkage_R_bits - 16)) & Linkage_R_mask);
3659 int framesize = ((iw1 >> Linkage_framesize_bits) & Linkage_framesize_mask);
3660 bu32 sp;
3661
3662 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_linkage);
3663 TRACE_EXTRACT (cpu, "%s: R:%i framesize:%#x", __func__, R, framesize);
3664
3665 if (R == 0)
3666 {
3667 int size = uimm16s4 (framesize);
3668 sp = SPREG;
3669 TRACE_INSN (cpu, "LINK %s;", uimm16s4_str (framesize));
3670 if (INSN_LEN == 8)
3671 illegal_instruction_combination (cpu);
3672 sp -= 4;
3673 PUT_LONG (sp, RETSREG);
3674 sp -= 4;
3675 PUT_LONG (sp, FPREG);
3676 SET_FPREG (sp);
3677 sp -= size;
3678 CYCLE_DELAY = 3;
3679 }
3680 else
3681 {
3682 /* Restore SP from FP. */
3683 sp = FPREG;
3684 TRACE_INSN (cpu, "UNLINK;");
3685 if (INSN_LEN == 8)
3686 illegal_instruction_combination (cpu);
3687 SET_FPREG (GET_LONG (sp));
3688 sp += 4;
3689 SET_RETSREG (GET_LONG (sp));
3690 sp += 4;
3691 CYCLE_DELAY = 2;
3692 }
3693
3694 SET_SPREG (sp);
3695 }
3696
3697 static void
decode_dsp32mac_0(SIM_CPU * cpu,bu16 iw0,bu16 iw1)3698 decode_dsp32mac_0 (SIM_CPU *cpu, bu16 iw0, bu16 iw1)
3699 {
3700 /* dsp32mac
3701 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
3702 | 1 | 1 | 0 | 0 |.M.| 0 | 0 |.mmod..........|.MM|.P.|.w1|.op1...|
3703 |.h01|.h11|.w0|.op0...|.h00|.h10|.dst.......|.src0......|.src1..|
3704 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
3705 int op1 = ((iw0 >> (DSP32Mac_op1_bits - 16)) & DSP32Mac_op1_mask);
3706 int w1 = ((iw0 >> (DSP32Mac_w1_bits - 16)) & DSP32Mac_w1_mask);
3707 int P = ((iw0 >> (DSP32Mac_p_bits - 16)) & DSP32Mac_p_mask);
3708 int MM = ((iw0 >> (DSP32Mac_MM_bits - 16)) & DSP32Mac_MM_mask);
3709 int mmod = ((iw0 >> (DSP32Mac_mmod_bits - 16)) & DSP32Mac_mmod_mask);
3710 int M = ((iw0 >> (DSP32Mac_M_bits - 16)) & DSP32Mac_M_mask);
3711 int w0 = ((iw1 >> DSP32Mac_w0_bits) & DSP32Mac_w0_mask);
3712 int src0 = ((iw1 >> DSP32Mac_src0_bits) & DSP32Mac_src0_mask);
3713 int src1 = ((iw1 >> DSP32Mac_src1_bits) & DSP32Mac_src1_mask);
3714 int dst = ((iw1 >> DSP32Mac_dst_bits) & DSP32Mac_dst_mask);
3715 int h10 = ((iw1 >> DSP32Mac_h10_bits) & DSP32Mac_h10_mask);
3716 int h00 = ((iw1 >> DSP32Mac_h00_bits) & DSP32Mac_h00_mask);
3717 int op0 = ((iw1 >> DSP32Mac_op0_bits) & DSP32Mac_op0_mask);
3718 int h11 = ((iw1 >> DSP32Mac_h11_bits) & DSP32Mac_h11_mask);
3719 int h01 = ((iw1 >> DSP32Mac_h01_bits) & DSP32Mac_h01_mask);
3720
3721 bu32 res = DREG (dst);
3722 bu32 v_i = 0, zero = 0, n_1 = 0, n_0 = 0;
3723
3724 static const char * const ops[] = { "=", "+=", "-=" };
3725 char _buf[128], *buf = _buf;
3726 int _MM = MM;
3727
3728 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_dsp32mac);
3729 TRACE_EXTRACT (cpu, "%s: M:%i mmod:%i MM:%i P:%i w1:%i op1:%i h01:%i h11:%i "
3730 "w0:%i op0:%i h00:%i h10:%i dst:%i src0:%i src1:%i",
3731 __func__, M, mmod, MM, P, w1, op1, h01, h11, w0, op0, h00, h10,
3732 dst, src0, src1);
3733
3734 if (w0 == 0 && w1 == 0 && op1 == 3 && op0 == 3)
3735 illegal_instruction (cpu);
3736
3737 if ((w1 || w0) && mmod == M_W32)
3738 illegal_instruction (cpu);
3739
3740 if (((1 << mmod) & (P ? 0x131b : 0x1b5f)) == 0)
3741 illegal_instruction (cpu);
3742
3743 /* First handle MAC1 side. */
3744 if (w1 == 1 || op1 != 3)
3745 {
3746 bu32 res1 = decode_macfunc (cpu, 1, op1, h01, h11, src0,
3747 src1, mmod, MM, P, &v_i, &n_1);
3748
3749 if (w1)
3750 buf += sprintf (buf, P ? "R%i" : "R%i.H", dst + P);
3751
3752 if (op1 == 3)
3753 {
3754 buf += sprintf (buf, " = A1");
3755 zero = !!(res1 == 0);
3756 }
3757 else
3758 {
3759 if (w1)
3760 buf += sprintf (buf, " = (");
3761 buf += sprintf (buf, "A1 %s R%i.%c * R%i.%c", ops[op1],
3762 src0, h01 ? 'H' : 'L',
3763 src1, h11 ? 'H' : 'L');
3764 if (w1)
3765 buf += sprintf (buf, ")");
3766 }
3767
3768 if (w1)
3769 {
3770 if (P)
3771 STORE (DREG (dst + 1), res1);
3772 else
3773 {
3774 if (res1 & 0xffff0000)
3775 illegal_instruction (cpu);
3776 res = REG_H_L (res1 << 16, res);
3777 }
3778 }
3779
3780 if (w0 == 1 || op0 != 3)
3781 {
3782 if (_MM)
3783 buf += sprintf (buf, " (M)");
3784 _MM = 0;
3785 buf += sprintf (buf, ", ");
3786 }
3787 }
3788
3789 /* Then handle MAC0 side. */
3790 if (w0 == 1 || op0 != 3)
3791 {
3792 bu32 res0 = decode_macfunc (cpu, 0, op0, h00, h10, src0,
3793 src1, mmod, 0, P, &v_i, &n_0);
3794
3795 if (w0)
3796 buf += sprintf (buf, P ? "R%i" : "R%i.L", dst);
3797
3798 if (op0 == 3)
3799 {
3800 buf += sprintf (buf, " = A0");
3801 zero |= !!(res0 == 0);
3802 }
3803 else
3804 {
3805 if (w0)
3806 buf += sprintf (buf, " = (");
3807 buf += sprintf (buf, "A0 %s R%i.%c * R%i.%c", ops[op0],
3808 src0, h00 ? 'H' : 'L',
3809 src1, h10 ? 'H' : 'L');
3810 if (w0)
3811 buf += sprintf (buf, ")");
3812 }
3813
3814 if (w0)
3815 {
3816 if (P)
3817 STORE (DREG (dst), res0);
3818 else
3819 {
3820 if (res0 & 0xffff0000)
3821 illegal_instruction (cpu);
3822 res = REG_H_L (res, res0);
3823 }
3824 }
3825 }
3826
3827 TRACE_INSN (cpu, "%s%s;", _buf, mac_optmode (mmod, _MM));
3828
3829 if (!P && (w0 || w1))
3830 {
3831 STORE (DREG (dst), res);
3832 SET_ASTATREG (v, v_i);
3833 if (v_i)
3834 SET_ASTATREG (vs, v_i);
3835 }
3836 else if (P)
3837 {
3838 SET_ASTATREG (v, v_i);
3839 if (v_i)
3840 SET_ASTATREG (vs, v_i);
3841 }
3842
3843 if ((w0 == 1 && op0 == 3) || (w1 == 1 && op1 == 3))
3844 {
3845 SET_ASTATREG (az, zero);
3846 if (!(w0 == 1 && op0 == 3))
3847 n_0 = 0;
3848 if (!(w1 == 1 && op1 == 3))
3849 n_1 = 0;
3850 SET_ASTATREG (an, n_1 | n_0);
3851 }
3852 }
3853
3854 static void
decode_dsp32mult_0(SIM_CPU * cpu,bu16 iw0,bu16 iw1)3855 decode_dsp32mult_0 (SIM_CPU *cpu, bu16 iw0, bu16 iw1)
3856 {
3857 /* dsp32mult
3858 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
3859 | 1 | 1 | 0 | 0 |.M.| 0 | 1 |.mmod..........|.MM|.P.|.w1|.op1...|
3860 |.h01|.h11|.w0|.op0...|.h00|.h10|.dst.......|.src0......|.src1..|
3861 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
3862 int op1 = ((iw0 >> (DSP32Mac_op1_bits - 16)) & DSP32Mac_op1_mask);
3863 int w1 = ((iw0 >> (DSP32Mac_w1_bits - 16)) & DSP32Mac_w1_mask);
3864 int P = ((iw0 >> (DSP32Mac_p_bits - 16)) & DSP32Mac_p_mask);
3865 int MM = ((iw0 >> (DSP32Mac_MM_bits - 16)) & DSP32Mac_MM_mask);
3866 int mmod = ((iw0 >> (DSP32Mac_mmod_bits - 16)) & DSP32Mac_mmod_mask);
3867 int M = ((iw0 >> (DSP32Mac_M_bits - 16)) & DSP32Mac_M_mask);
3868 int w0 = ((iw1 >> DSP32Mac_w0_bits) & DSP32Mac_w0_mask);
3869 int src0 = ((iw1 >> DSP32Mac_src0_bits) & DSP32Mac_src0_mask);
3870 int src1 = ((iw1 >> DSP32Mac_src1_bits) & DSP32Mac_src1_mask);
3871 int dst = ((iw1 >> DSP32Mac_dst_bits) & DSP32Mac_dst_mask);
3872 int h10 = ((iw1 >> DSP32Mac_h10_bits) & DSP32Mac_h10_mask);
3873 int h00 = ((iw1 >> DSP32Mac_h00_bits) & DSP32Mac_h00_mask);
3874 int op0 = ((iw1 >> DSP32Mac_op0_bits) & DSP32Mac_op0_mask);
3875 int h11 = ((iw1 >> DSP32Mac_h11_bits) & DSP32Mac_h11_mask);
3876 int h01 = ((iw1 >> DSP32Mac_h01_bits) & DSP32Mac_h01_mask);
3877
3878 bu32 res = DREG (dst);
3879 bu32 sat0 = 0, sat1 = 0, v_i0 = 0, v_i1 = 0;
3880 char _buf[128], *buf = _buf;
3881 int _MM = MM;
3882
3883 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_dsp32mult);
3884 TRACE_EXTRACT (cpu, "%s: M:%i mmod:%i MM:%i P:%i w1:%i op1:%i h01:%i h11:%i "
3885 "w0:%i op0:%i h00:%i h10:%i dst:%i src0:%i src1:%i",
3886 __func__, M, mmod, MM, P, w1, op1, h01, h11, w0, op0, h00, h10,
3887 dst, src0, src1);
3888
3889 if (w1 == 0 && w0 == 0)
3890 illegal_instruction (cpu);
3891 if (((1 << mmod) & (P ? 0x313 : 0x1b57)) == 0)
3892 illegal_instruction (cpu);
3893 if (P && ((dst & 1) || (op1 != 0) || (op0 != 0) || !is_macmod_pmove (mmod)))
3894 illegal_instruction (cpu);
3895 if (!P && ((op1 != 0) || (op0 != 0) || !is_macmod_hmove (mmod)))
3896 illegal_instruction (cpu);
3897
3898 /* First handle MAC1 side. */
3899 if (w1)
3900 {
3901 bu64 r = decode_multfunc (cpu, h01, h11, src0, src1, mmod, MM, &sat1);
3902 bu32 res1 = extract_mult (cpu, r, mmod, MM, P, &v_i1);
3903
3904 buf += sprintf (buf, P ? "R%i" : "R%i.H", dst + P);
3905 buf += sprintf (buf, " = R%i.%c * R%i.%c",
3906 src0, h01 ? 'H' : 'L',
3907 src1, h11 ? 'H' : 'L');
3908 if (w0)
3909 {
3910 if (_MM)
3911 buf += sprintf (buf, " (M)");
3912 _MM = 0;
3913 buf += sprintf (buf, ", ");
3914 }
3915
3916 if (P)
3917 STORE (DREG (dst + 1), res1);
3918 else
3919 {
3920 if (res1 & 0xFFFF0000)
3921 illegal_instruction (cpu);
3922 res = REG_H_L (res1 << 16, res);
3923 }
3924 }
3925
3926 /* First handle MAC0 side. */
3927 if (w0)
3928 {
3929 bu64 r = decode_multfunc (cpu, h00, h10, src0, src1, mmod, 0, &sat0);
3930 bu32 res0 = extract_mult (cpu, r, mmod, 0, P, &v_i0);
3931
3932 buf += sprintf (buf, P ? "R%i" : "R%i.L", dst);
3933 buf += sprintf (buf, " = R%i.%c * R%i.%c",
3934 src0, h01 ? 'H' : 'L',
3935 src1, h11 ? 'H' : 'L');
3936
3937 if (P)
3938 STORE (DREG (dst), res0);
3939 else
3940 {
3941 if (res0 & 0xFFFF0000)
3942 illegal_instruction (cpu);
3943 res = REG_H_L (res, res0);
3944 }
3945 }
3946
3947 TRACE_INSN (cpu, "%s%s;", _buf, mac_optmode (mmod, _MM));
3948
3949 if (!P && (w0 || w1))
3950 STORE (DREG (dst), res);
3951
3952 if (w0 || w1)
3953 {
3954 bu32 v = sat0 | sat1 | v_i0 | v_i1;
3955
3956 STORE (ASTATREG (v), v);
3957 STORE (ASTATREG (v_copy), v);
3958 if (v)
3959 STORE (ASTATREG (vs), v);
3960 }
3961 }
3962
3963 static void
decode_dsp32alu_0(SIM_CPU * cpu,bu16 iw0,bu16 iw1)3964 decode_dsp32alu_0 (SIM_CPU *cpu, bu16 iw0, bu16 iw1)
3965 {
3966 /* dsp32alu
3967 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
3968 | 1 | 1 | 0 | 0 |.M.| 1 | 0 | - | - | - |.HL|.aopcde............|
3969 |.aop...|.s.|.x.|.dst0......|.dst1......|.src0......|.src1......|
3970 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
3971 int s = ((iw1 >> DSP32Alu_s_bits) & DSP32Alu_s_mask);
3972 int x = ((iw1 >> DSP32Alu_x_bits) & DSP32Alu_x_mask);
3973 int aop = ((iw1 >> DSP32Alu_aop_bits) & DSP32Alu_aop_mask);
3974 int src0 = ((iw1 >> DSP32Alu_src0_bits) & DSP32Alu_src0_mask);
3975 int src1 = ((iw1 >> DSP32Alu_src1_bits) & DSP32Alu_src1_mask);
3976 int dst0 = ((iw1 >> DSP32Alu_dst0_bits) & DSP32Alu_dst0_mask);
3977 int dst1 = ((iw1 >> DSP32Alu_dst1_bits) & DSP32Alu_dst1_mask);
3978 int M = ((iw0 >> (DSP32Alu_M_bits - 16)) & DSP32Alu_M_mask);
3979 int HL = ((iw0 >> (DSP32Alu_HL_bits - 16)) & DSP32Alu_HL_mask);
3980 int aopcde = ((iw0 >> (DSP32Alu_aopcde_bits - 16)) & DSP32Alu_aopcde_mask);
3981
3982 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_dsp32alu);
3983 TRACE_EXTRACT (cpu, "%s: M:%i HL:%i aopcde:%i aop:%i s:%i x:%i dst0:%i "
3984 "dst1:%i src0:%i src1:%i",
3985 __func__, M, HL, aopcde, aop, s, x, dst0, dst1, src0, src1);
3986
3987 if ((aop == 0 || aop == 2) && aopcde == 9 && HL == 0 && s == 0)
3988 {
3989 int a = aop >> 1;
3990 TRACE_INSN (cpu, "A%i.L = R%i.L;", a, src0);
3991 SET_AWREG (a, REG_H_L (AWREG (a), DREG (src0)));
3992 }
3993 else if ((aop == 0 || aop == 2) && aopcde == 9 && HL == 1 && s == 0)
3994 {
3995 int a = aop >> 1;
3996 TRACE_INSN (cpu, "A%i.H = R%i.H;", a, src0);
3997 SET_AWREG (a, REG_H_L (DREG (src0), AWREG (a)));
3998 }
3999 else if ((aop == 1 || aop == 0) && aopcde == 5)
4000 {
4001 bs32 val0 = DREG (src0);
4002 bs32 val1 = DREG (src1);
4003 bs32 res;
4004 bs32 signRes;
4005 bs32 ovX, sBit1, sBit2, sBitRes1, sBitRes2;
4006
4007 TRACE_INSN (cpu, "R%i.%s = R%i %s R%i (RND12)", dst0, HL ? "L" : "H",
4008 src0, aop & 0x1 ? "-" : "+", src1);
4009
4010 /* If subtract, just invert and add one. */
4011 if (aop & 0x1)
4012 {
4013 if (val1 == 0x80000000)
4014 val1 = 0x7FFFFFFF;
4015 else
4016 val1 = ~val1 + 1;
4017 }
4018
4019 /* Get the sign bits, since we need them later. */
4020 sBit1 = !!(val0 & 0x80000000);
4021 sBit2 = !!(val1 & 0x80000000);
4022
4023 res = val0 + val1;
4024
4025 sBitRes1 = !!(res & 0x80000000);
4026 /* Round to the 12th bit. */
4027 res += 0x0800;
4028 sBitRes2 = !!(res & 0x80000000);
4029
4030 signRes = res;
4031 signRes >>= 27;
4032
4033 /* Overflow if
4034 pos + pos = neg
4035 neg + neg = pos
4036 positive_res + positive_round = neg
4037 Shift and upper 4 bits where not the same. */
4038 if ((!(sBit1 ^ sBit2) && (sBit1 ^ sBitRes1))
4039 || (!sBit1 && !sBit2 && sBitRes2)
4040 || ((signRes != 0) && (signRes != -1)))
4041 {
4042 /* Both X1 and X2 Neg res is neg overflow. */
4043 if (sBit1 && sBit2)
4044 res = 0x80000000;
4045 /* Both X1 and X2 Pos res is pos overflow. */
4046 else if (!sBit1 && !sBit2)
4047 res = 0x7FFFFFFF;
4048 /* Pos+Neg or Neg+Pos take the sign of the result. */
4049 else if (sBitRes1)
4050 res = 0x80000000;
4051 else
4052 res = 0x7FFFFFFF;
4053
4054 ovX = 1;
4055 }
4056 else
4057 {
4058 /* Shift up now after overflow detection. */
4059 ovX = 0;
4060 res <<= 4;
4061 }
4062
4063 res >>= 16;
4064
4065 if (HL)
4066 STORE (DREG (dst0), REG_H_L (res << 16, DREG (dst0)));
4067 else
4068 STORE (DREG (dst0), REG_H_L (DREG (dst0), res));
4069
4070 SET_ASTATREG (az, res == 0);
4071 SET_ASTATREG (an, res & 0x8000);
4072 SET_ASTATREG (v, ovX);
4073 if (ovX)
4074 SET_ASTATREG (vs, ovX);
4075 }
4076 else if ((aop == 2 || aop == 3) && aopcde == 5)
4077 {
4078 bs32 val0 = DREG (src0);
4079 bs32 val1 = DREG (src1);
4080 bs32 res;
4081
4082 TRACE_INSN (cpu, "R%i.%s = R%i %s R%i (RND20)", dst0, HL ? "L" : "H",
4083 src0, aop & 0x1 ? "-" : "+", src1);
4084
4085 /* If subtract, just invert and add one. */
4086 if (aop & 0x1)
4087 val1 = ~val1 + 1;
4088
4089 res = (val0 >> 4) + (val1 >> 4) + (((val0 & 0xf) + (val1 & 0xf)) >> 4);
4090 res += 0x8000;
4091 /* Don't sign extend during the shift. */
4092 res = ((bu32)res >> 16);
4093
4094 /* Don't worry about overflows, since we are shifting right. */
4095
4096 if (HL)
4097 STORE (DREG (dst0), REG_H_L (res << 16, DREG (dst0)));
4098 else
4099 STORE (DREG (dst0), REG_H_L (DREG (dst0), res));
4100
4101 SET_ASTATREG (az, res == 0);
4102 SET_ASTATREG (an, res & 0x8000);
4103 SET_ASTATREG (v, 0);
4104 }
4105 else if (aopcde == 2 || aopcde == 3)
4106 {
4107 bu32 s1, s2, val, ac0_i = 0, v_i = 0;
4108
4109 TRACE_INSN (cpu, "R%i.%c = R%i.%c %c R%i.%c%s;",
4110 dst0, HL ? 'H' : 'L',
4111 src0, aop & 2 ? 'H' : 'L',
4112 aopcde == 2 ? '+' : '-',
4113 src1, aop & 1 ? 'H' : 'L',
4114 amod1 (s, x));
4115
4116 s1 = DREG (src0);
4117 s2 = DREG (src1);
4118 if (aop & 1)
4119 s2 >>= 16;
4120 if (aop & 2)
4121 s1 >>= 16;
4122
4123 if (aopcde == 2)
4124 val = add16 (cpu, s1, s2, &ac0_i, &v_i, 0, 0, s, 0);
4125 else
4126 val = sub16 (cpu, s1, s2, &ac0_i, &v_i, 0, 0, s, 0);
4127
4128 SET_ASTATREG (ac0, ac0_i);
4129 SET_ASTATREG (v, v_i);
4130 if (v_i)
4131 SET_ASTATREG (vs, v_i);
4132
4133 if (HL)
4134 SET_DREG_H (dst0, val << 16);
4135 else
4136 SET_DREG_L (dst0, val);
4137
4138 SET_ASTATREG (an, val & 0x8000);
4139 SET_ASTATREG (az, val == 0);
4140 }
4141 else if ((aop == 0 || aop == 2) && aopcde == 9 && s == 1)
4142 {
4143 int a = aop >> 1;
4144 TRACE_INSN (cpu, "A%i = R%i;", a, src0);
4145 SET_AREG32 (a, DREG (src0));
4146 }
4147 else if ((aop == 1 || aop == 3) && aopcde == 9 && s == 0)
4148 {
4149 int a = aop >> 1;
4150 TRACE_INSN (cpu, "A%i.X = R%i.L;", a, src0);
4151 SET_AXREG (a, (bs8)DREG (src0));
4152 }
4153 else if (aop == 3 && aopcde == 11 && (s == 0 || s == 1))
4154 {
4155 bu64 acc0 = get_extended_acc (cpu, 0);
4156 bu64 acc1 = get_extended_acc (cpu, 1);
4157 bu32 carry = (bu40)acc1 < (bu40)acc0;
4158 bu32 sat = 0;
4159
4160 TRACE_INSN (cpu, "A0 -= A1%s;", s ? " (W32)" : "");
4161
4162 acc0 -= acc1;
4163 if ((bs64)acc0 < -0x8000000000ll)
4164 acc0 = -0x8000000000ull, sat = 1;
4165 else if ((bs64)acc0 >= 0x7fffffffffll)
4166 acc0 = 0x7fffffffffull, sat = 1;
4167
4168 if (s == 1)
4169 {
4170 /* A0 -= A1 (W32) */
4171 if (acc0 & (bu64)0x8000000000ll)
4172 acc0 &= 0x80ffffffffll, sat = 1;
4173 else
4174 acc0 &= 0xffffffffll;
4175 }
4176 STORE (AXREG (0), (acc0 >> 32) & 0xff);
4177 STORE (AWREG (0), acc0 & 0xffffffff);
4178 STORE (ASTATREG (az), acc0 == 0);
4179 STORE (ASTATREG (an), !!(acc0 & (bu64)0x8000000000ll));
4180 STORE (ASTATREG (ac0), carry);
4181 STORE (ASTATREG (ac0_copy), carry);
4182 STORE (ASTATREG (av0), sat);
4183 if (sat)
4184 STORE (ASTATREG (av0s), sat);
4185 }
4186 else if ((aop == 0 || aop == 1) && aopcde == 22)
4187 {
4188 bu32 s0, s0L, s0H, s1, s1L, s1H;
4189 bu32 tmp0, tmp1, i;
4190 const char * const opts[] = { "rndl", "rndh", "tl", "th" };
4191
4192 TRACE_INSN (cpu, "R%i = BYTEOP2P (R%i:%i, R%i:%i) (%s%s);", dst0,
4193 src0 + 1, src0, src1 + 1, src1, opts[HL + (aop << 1)],
4194 s ? ", r" : "");
4195
4196 s0L = DREG (src0);
4197 s0H = DREG (src0 + 1);
4198 s1L = DREG (src1);
4199 s1H = DREG (src1 + 1);
4200 if (s)
4201 {
4202 s0 = algn (s0H, s0L, IREG (0) & 3);
4203 s1 = algn (s1H, s1L, IREG (0) & 3);
4204 }
4205 else
4206 {
4207 s0 = algn (s0L, s0H, IREG (0) & 3);
4208 s1 = algn (s1L, s1H, IREG (0) & 3);
4209 }
4210
4211 i = !aop * 2;
4212 tmp0 = ((((s1 >> 8) & 0xff) + ((s1 >> 0) & 0xff) +
4213 ((s0 >> 8) & 0xff) + ((s0 >> 0) & 0xff) + i) >> 2) & 0xff;
4214 tmp1 = ((((s1 >> 24) & 0xff) + ((s1 >> 16) & 0xff) +
4215 ((s0 >> 24) & 0xff) + ((s0 >> 16) & 0xff) + i) >> 2) & 0xff;
4216 SET_DREG (dst0, (tmp1 << (16 + (HL * 8))) | (tmp0 << (HL * 8)));
4217 }
4218 else if ((aop == 0 || aop == 1) && s == 0 && aopcde == 8)
4219 {
4220 TRACE_INSN (cpu, "A%i = 0;", aop);
4221 SET_AREG (aop, 0);
4222 }
4223 else if (aop == 2 && s == 0 && aopcde == 8)
4224 {
4225 TRACE_INSN (cpu, "A1 = A0 = 0;");
4226 SET_AREG (0, 0);
4227 SET_AREG (1, 0);
4228 }
4229 else if ((aop == 0 || aop == 1 || aop == 2) && s == 1 && aopcde == 8)
4230 {
4231 bs40 acc0 = get_extended_acc (cpu, 0);
4232 bs40 acc1 = get_extended_acc (cpu, 1);
4233 bu32 sat;
4234
4235 if (aop == 0 || aop == 1)
4236 TRACE_INSN (cpu, "A%i = A%i (S);", aop, aop);
4237 else
4238 TRACE_INSN (cpu, "A1 = A1 (S), A0 = A0 (S);");
4239
4240 if (aop == 0 || aop == 2)
4241 {
4242 sat = 0;
4243 acc0 = saturate_s32 (acc0, &sat);
4244 acc0 |= -(acc0 & 0x80000000ull);
4245 SET_AXREG (0, (acc0 >> 31) & 0xFF);
4246 SET_AWREG (0, acc0 & 0xFFFFFFFF);
4247 SET_ASTATREG (av0, sat);
4248 if (sat)
4249 SET_ASTATREG (av0s, sat);
4250 }
4251 else
4252 acc0 = 1;
4253
4254 if (aop == 1 || aop == 2)
4255 {
4256 sat = 0;
4257 acc1 = saturate_s32 (acc1, &sat);
4258 acc1 |= -(acc1 & 0x80000000ull);
4259 SET_AXREG (1, (acc1 >> 31) & 0xFF);
4260 SET_AWREG (1, acc1 & 0xFFFFFFFF);
4261 SET_ASTATREG (av1, sat);
4262 if (sat)
4263 SET_ASTATREG (av1s, sat);
4264 }
4265 else
4266 acc1 = 1;
4267
4268 SET_ASTATREG (az, (acc0 == 0) || (acc1 == 0));
4269 SET_ASTATREG (an, ((acc0 >> 31) & 1) || ((acc1 >> 31) & 1));
4270 }
4271 else if (aop == 3 && (s == 0 || s == 1) && aopcde == 8)
4272 {
4273 TRACE_INSN (cpu, "A%i = A%i;", s, !s);
4274 SET_AXREG (s, AXREG (!s));
4275 SET_AWREG (s, AWREG (!s));
4276 }
4277 else if (aop == 3 && HL == 0 && aopcde == 16)
4278 {
4279 int i;
4280 bu32 az;
4281
4282 TRACE_INSN (cpu, "A1 = ABS A1 , A0 = ABS A0;");
4283
4284 az = 0;
4285 for (i = 0; i < 2; ++i)
4286 {
4287 bu32 av;
4288 bs40 acc = get_extended_acc (cpu, i);
4289
4290 if (acc >> 39)
4291 acc = -acc;
4292 av = acc == ((bs40)1 << 39);
4293 if (av)
4294 acc = ((bs40)1 << 39) - 1;
4295
4296 SET_AREG (i, acc);
4297 SET_ASTATREG (av[i], av);
4298 if (av)
4299 SET_ASTATREG (avs[i], av);
4300 az |= (acc == 0);
4301 }
4302 SET_ASTATREG (az, az);
4303 SET_ASTATREG (an, 0);
4304 }
4305 else if (aop == 0 && aopcde == 23)
4306 {
4307 bu32 s0, s0L, s0H, s1, s1L, s1H;
4308 bs32 tmp0, tmp1;
4309
4310 TRACE_INSN (cpu, "R%i = BYTEOP3P (R%i:%i, R%i:%i) (%s%s);", dst0,
4311 src0 + 1, src0, src1 + 1, src1, HL ? "HI" : "LO",
4312 s ? ", R" : "");
4313
4314 s0L = DREG (src0);
4315 s0H = DREG (src0 + 1);
4316 s1L = DREG (src1);
4317 s1H = DREG (src1 + 1);
4318 if (s)
4319 {
4320 s0 = algn (s0H, s0L, IREG (0) & 3);
4321 s1 = algn (s1H, s1L, IREG (1) & 3);
4322 }
4323 else
4324 {
4325 s0 = algn (s0L, s0H, IREG (0) & 3);
4326 s1 = algn (s1L, s1H, IREG (1) & 3);
4327 }
4328
4329 tmp0 = (bs32)(bs16)(s0 >> 0) + ((s1 >> ( 0 + (8 * !HL))) & 0xff);
4330 tmp1 = (bs32)(bs16)(s0 >> 16) + ((s1 >> (16 + (8 * !HL))) & 0xff);
4331 SET_DREG (dst0, (CLAMP (tmp0, 0, 255) << ( 0 + (8 * HL))) |
4332 (CLAMP (tmp1, 0, 255) << (16 + (8 * HL))));
4333 }
4334 else if ((aop == 0 || aop == 1) && aopcde == 16)
4335 {
4336 bu32 av;
4337 bs40 acc;
4338
4339 TRACE_INSN (cpu, "A%i = ABS A%i;", HL, aop);
4340
4341 acc = get_extended_acc (cpu, aop);
4342 if (acc >> 39)
4343 acc = -acc;
4344 av = acc == ((bs40)1 << 39);
4345 if (av)
4346 acc = ((bs40)1 << 39) - 1;
4347 SET_AREG (HL, acc);
4348
4349 SET_ASTATREG (av[HL], av);
4350 if (av)
4351 SET_ASTATREG (avs[HL], av);
4352 SET_ASTATREG (az, acc == 0);
4353 SET_ASTATREG (an, 0);
4354 }
4355 else if (aop == 3 && aopcde == 12)
4356 {
4357 bs32 res = DREG (src0);
4358 bs32 ovX;
4359 bool sBit_a, sBit_b;
4360
4361 TRACE_INSN (cpu, "R%i.%s = R%i (RND);", dst0, HL == 0 ? "L" : "H", src0);
4362 TRACE_DECODE (cpu, "R%i.%s = R%i:%#x (RND);", dst0,
4363 HL == 0 ? "L" : "H", src0, res);
4364
4365 sBit_b = !!(res & 0x80000000);
4366
4367 res += 0x8000;
4368 sBit_a = !!(res & 0x80000000);
4369
4370 /* Overflow if the sign bit changed when we rounded. */
4371 if ((res >> 16) && (sBit_b != sBit_a))
4372 {
4373 ovX = 1;
4374 if (!sBit_b)
4375 res = 0x7FFF;
4376 else
4377 res = 0x8000;
4378 }
4379 else
4380 {
4381 res = res >> 16;
4382 ovX = 0;
4383 }
4384
4385 if (!HL)
4386 SET_DREG (dst0, REG_H_L (DREG (dst0), res));
4387 else
4388 SET_DREG (dst0, REG_H_L (res << 16, DREG (dst0)));
4389
4390 SET_ASTATREG (az, res == 0);
4391 SET_ASTATREG (an, res < 0);
4392 SET_ASTATREG (v, ovX);
4393 if (ovX)
4394 SET_ASTATREG (vs, ovX);
4395 }
4396 else if (aop == 3 && HL == 0 && aopcde == 15)
4397 {
4398 bu32 hi = (-(bs16)(DREG (src0) >> 16)) << 16;
4399 bu32 lo = (-(bs16)(DREG (src0) & 0xFFFF)) & 0xFFFF;
4400 int v, ac0, ac1;
4401
4402 TRACE_INSN (cpu, "R%i = -R%i (V);", dst0, src0);
4403
4404 v = ac0 = ac1 = 0;
4405
4406 if (hi == 0x80000000)
4407 {
4408 hi = 0x7fff0000;
4409 v = 1;
4410 }
4411 else if (hi == 0)
4412 ac1 = 1;
4413
4414 if (lo == 0x8000)
4415 {
4416 lo = 0x7fff;
4417 v = 1;
4418 }
4419 else if (lo == 0)
4420 ac0 = 1;
4421
4422 SET_DREG (dst0, hi | lo);
4423
4424 SET_ASTATREG (v, v);
4425 if (v)
4426 SET_ASTATREG (vs, 1);
4427 SET_ASTATREG (ac0, ac0);
4428 SET_ASTATREG (ac1, ac1);
4429 setflags_nz_2x16 (cpu, DREG (dst0));
4430 }
4431 else if (aop == 3 && HL == 0 && aopcde == 14)
4432 {
4433 TRACE_INSN (cpu, "A1 = - A1 , A0 = - A0;");
4434
4435 SET_AREG (0, saturate_s40 (-get_extended_acc (cpu, 0)));
4436 SET_AREG (1, saturate_s40 (-get_extended_acc (cpu, 1)));
4437 /* XXX: what ASTAT flags need updating ? */
4438 }
4439 else if ((aop == 0 || aop == 1) && (HL == 0 || HL == 1) && aopcde == 14)
4440 {
4441 bs40 src_acc = get_extended_acc (cpu, aop);
4442 int v = 0;
4443
4444 TRACE_INSN (cpu, "A%i = - A%i;", HL, aop);
4445
4446 SET_AREG (HL, saturate_s40_astat (-src_acc, &v));
4447
4448 SET_ASTATREG (az, AWREG (HL) == 0 && AXREG (HL) == 0);
4449 SET_ASTATREG (an, AXREG (HL) >> 7);
4450 if (HL == 0)
4451 {
4452 SET_ASTATREG (ac0, !src_acc);
4453 SET_ASTATREG (av0, v);
4454 if (v)
4455 SET_ASTATREG (av0s, 1);
4456 }
4457 else
4458 {
4459 SET_ASTATREG (ac1, !src_acc);
4460 SET_ASTATREG (av1, v);
4461 if (v)
4462 SET_ASTATREG (av1s, 1);
4463 }
4464 }
4465 else if (aop == 0 && aopcde == 12)
4466 {
4467 bs16 tmp0_hi = DREG (src0) >> 16;
4468 bs16 tmp0_lo = DREG (src0);
4469 bs16 tmp1_hi = DREG (src1) >> 16;
4470 bs16 tmp1_lo = DREG (src1);
4471
4472 TRACE_INSN (cpu, "R%i.L = R%i.H = SIGN(R%i.H) * R%i.H + SIGN(R%i.L) * R%i.L;",
4473 dst0, dst0, src0, src1, src0, src1);
4474
4475 if ((tmp0_hi >> 15) & 1)
4476 tmp1_hi = ~tmp1_hi + 1;
4477
4478 if ((tmp0_lo >> 15) & 1)
4479 tmp1_lo = ~tmp1_lo + 1;
4480
4481 tmp1_hi = tmp1_hi + tmp1_lo;
4482
4483 STORE (DREG (dst0), REG_H_L (tmp1_hi << 16, tmp1_hi));
4484 }
4485 else if (aopcde == 0)
4486 {
4487 bu32 s0 = DREG (src0);
4488 bu32 s1 = DREG (src1);
4489 bu32 s0h = s0 >> 16;
4490 bu32 s0l = s0 & 0xFFFF;
4491 bu32 s1h = s1 >> 16;
4492 bu32 s1l = s1 & 0xFFFF;
4493 bu32 t0, t1;
4494 bu32 ac1_i = 0, ac0_i = 0, v_i = 0, z_i = 0, n_i = 0;
4495
4496 TRACE_INSN (cpu, "R%i = R%i %c|%c R%i%s;", dst0, src0,
4497 (aop & 2) ? '-' : '+', (aop & 1) ? '-' : '+', src1,
4498 amod0 (s, x));
4499 if (aop & 2)
4500 t0 = sub16 (cpu, s0h, s1h, &ac1_i, &v_i, &z_i, &n_i, s, 0);
4501 else
4502 t0 = add16 (cpu, s0h, s1h, &ac1_i, &v_i, &z_i, &n_i, s, 0);
4503
4504 if (aop & 1)
4505 t1 = sub16 (cpu, s0l, s1l, &ac0_i, &v_i, &z_i, &n_i, s, 0);
4506 else
4507 t1 = add16 (cpu, s0l, s1l, &ac0_i, &v_i, &z_i, &n_i, s, 0);
4508
4509 SET_ASTATREG (ac1, ac1_i);
4510 SET_ASTATREG (ac0, ac0_i);
4511 SET_ASTATREG (az, z_i);
4512 SET_ASTATREG (an, n_i);
4513 SET_ASTATREG (v, v_i);
4514 if (v_i)
4515 SET_ASTATREG (vs, v_i);
4516
4517 t0 &= 0xFFFF;
4518 t1 &= 0xFFFF;
4519 if (x)
4520 SET_DREG (dst0, (t1 << 16) | t0);
4521 else
4522 SET_DREG (dst0, (t0 << 16) | t1);
4523 }
4524 else if (aop == 1 && aopcde == 12)
4525 {
4526 bs32 val0 = (bs16)(AWREG (0) >> 16) + (bs16)AWREG (0);
4527 bs32 val1 = (bs16)(AWREG (1) >> 16) + (bs16)AWREG (1);
4528
4529 TRACE_INSN (cpu, "R%i = A1.L + A1.H, R%i = A0.L + A0.H;", dst1, dst0);
4530
4531 if (dst0 == dst1)
4532 illegal_instruction_combination (cpu);
4533
4534 SET_DREG (dst0, val0);
4535 SET_DREG (dst1, val1);
4536 }
4537 else if (aopcde == 1)
4538 {
4539 bu32 d0, d1;
4540 bu32 x0, x1;
4541 bu16 s0L = DREG (src0);
4542 bu16 s0H = DREG (src0) >> 16;
4543 bu16 s1L = DREG (src1);
4544 bu16 s1H = DREG (src1) >> 16;
4545 bu32 v_i = 0, n_i = 0, z_i = 0;
4546
4547 TRACE_INSN (cpu, "R%i = R%i %s R%i, R%i = R%i %s R%i%s;",
4548 dst1, src0, HL ? "+|-" : "+|+", src1,
4549 dst0, src0, HL ? "-|+" : "-|-", src1,
4550 amod0amod2 (s, x, aop));
4551
4552 if (dst0 == dst1)
4553 illegal_instruction_combination (cpu);
4554
4555 if (HL == 0)
4556 {
4557 x0 = add16 (cpu, s0H, s1H, 0, &v_i, &z_i, &n_i, s, aop) & 0xffff;
4558 x1 = add16 (cpu, s0L, s1L, 0, &v_i, &z_i, &n_i, s, aop) & 0xffff;
4559 d1 = (x0 << 16) | x1;
4560
4561 x0 = sub16 (cpu, s0H, s1H, 0, &v_i, &z_i, &n_i, s, aop) & 0xffff;
4562 x1 = sub16 (cpu, s0L, s1L, 0, &v_i, &z_i, &n_i, s, aop) & 0xffff;
4563 if (x == 0)
4564 d0 = (x0 << 16) | x1;
4565 else
4566 d0 = (x1 << 16) | x0;
4567 }
4568 else
4569 {
4570 x0 = add16 (cpu, s0H, s1H, 0, &v_i, &z_i, &n_i, s, aop) & 0xffff;
4571 x1 = sub16 (cpu, s0L, s1L, 0, &v_i, &z_i, &n_i, s, aop) & 0xffff;
4572 d1 = (x0 << 16) | x1;
4573
4574 x0 = sub16 (cpu, s0H, s1H, 0, &v_i, &z_i, &n_i, s, aop) & 0xffff;
4575 x1 = add16 (cpu, s0L, s1L, 0, &v_i, &z_i, &n_i, s, aop) & 0xffff;
4576 if (x == 0)
4577 d0 = (x0 << 16) | x1;
4578 else
4579 d0 = (x1 << 16) | x0;
4580 }
4581 SET_ASTATREG (az, z_i);
4582 SET_ASTATREG (an, n_i);
4583 SET_ASTATREG (v, v_i);
4584 if (v_i)
4585 SET_ASTATREG (vs, v_i);
4586
4587 STORE (DREG (dst0), d0);
4588 STORE (DREG (dst1), d1);
4589 }
4590 else if ((aop == 0 || aop == 1 || aop == 2) && aopcde == 11)
4591 {
4592 bs40 acc0 = get_extended_acc (cpu, 0);
4593 bs40 acc1 = get_extended_acc (cpu, 1);
4594 bu32 v, dreg, sat = 0;
4595 bu32 carry = !!((bu40)~acc1 < (bu40)acc0);
4596
4597 if (aop == 0)
4598 TRACE_INSN (cpu, "R%i = (A0 += A1);", dst0);
4599 else if (aop == 1)
4600 TRACE_INSN (cpu, "R%i.%c = (A0 += A1);", dst0, HL ? 'H' : 'L');
4601 else
4602 TRACE_INSN (cpu, "A0 += A1%s;", s ? " (W32)" : "");
4603
4604 acc0 += acc1;
4605 acc0 = saturate_s40_astat (acc0, &v);
4606
4607 if (aop == 2 && s == 1) /* A0 += A1 (W32) */
4608 {
4609 if (acc0 & (bs40)0x8000000000ll)
4610 acc0 &= 0x80ffffffffll;
4611 else
4612 acc0 &= 0xffffffffll;
4613 }
4614
4615 STORE (AXREG (0), acc0 >> 32);
4616 STORE (AWREG (0), acc0);
4617 SET_ASTATREG (av0, v && acc1);
4618 if (v)
4619 SET_ASTATREG (av0s, v);
4620
4621 if (aop == 0 || aop == 1)
4622 {
4623 if (aop) /* Dregs_lo = A0 += A1 */
4624 {
4625 dreg = saturate_s32 (rnd16 (acc0) << 16, &sat);
4626 if (HL)
4627 STORE (DREG (dst0), REG_H_L (dreg, DREG (dst0)));
4628 else
4629 STORE (DREG (dst0), REG_H_L (DREG (dst0), dreg >> 16));
4630 }
4631 else /* Dregs = A0 += A1 */
4632 {
4633 dreg = saturate_s32 (acc0, &sat);
4634 STORE (DREG (dst0), dreg);
4635 }
4636
4637 STORE (ASTATREG (az), dreg == 0);
4638 STORE (ASTATREG (an), !!(dreg & 0x80000000));
4639 STORE (ASTATREG (ac0), carry);
4640 STORE (ASTATREG (ac0_copy), carry);
4641 STORE (ASTATREG (v), sat);
4642 STORE (ASTATREG (v_copy), sat);
4643 if (sat)
4644 STORE (ASTATREG (vs), sat);
4645 }
4646 else
4647 {
4648 STORE (ASTATREG (az), acc0 == 0);
4649 STORE (ASTATREG (an), !!(acc0 & 0x8000000000ull));
4650 STORE (ASTATREG (ac0), carry);
4651 STORE (ASTATREG (ac0_copy), carry);
4652 }
4653 }
4654 else if ((aop == 0 || aop == 1) && aopcde == 10)
4655 {
4656 TRACE_INSN (cpu, "R%i.L = A%i.X;", dst0, aop);
4657 SET_DREG_L (dst0, (bs8)AXREG (aop));
4658 }
4659 else if (aop == 0 && aopcde == 4)
4660 {
4661 TRACE_INSN (cpu, "R%i = R%i + R%i%s;", dst0, src0, src1, amod1 (s, x));
4662 SET_DREG (dst0, add32 (cpu, DREG (src0), DREG (src1), 1, s));
4663 }
4664 else if (aop == 1 && aopcde == 4)
4665 {
4666 TRACE_INSN (cpu, "R%i = R%i - R%i%s;", dst0, src0, src1, amod1 (s, x));
4667 SET_DREG (dst0, sub32 (cpu, DREG (src0), DREG (src1), 1, s, 0));
4668 }
4669 else if (aop == 2 && aopcde == 4)
4670 {
4671 TRACE_INSN (cpu, "R%i = R%i + R%i, R%i = R%i - R%i%s;",
4672 dst1, src0, src1, dst0, src0, src1, amod1 (s, x));
4673
4674 if (dst0 == dst1)
4675 illegal_instruction_combination (cpu);
4676
4677 STORE (DREG (dst1), add32 (cpu, DREG (src0), DREG (src1), 1, s));
4678 STORE (DREG (dst0), sub32 (cpu, DREG (src0), DREG (src1), 1, s, 1));
4679 }
4680 else if ((aop == 0 || aop == 1) && aopcde == 17)
4681 {
4682 bs40 acc0 = get_extended_acc (cpu, 0);
4683 bs40 acc1 = get_extended_acc (cpu, 1);
4684 bs40 val0, val1, sval0, sval1;
4685 bu32 sat, sat_i;
4686
4687 TRACE_INSN (cpu, "R%i = A%i + A%i, R%i = A%i - A%i%s",
4688 dst1, !aop, aop, dst0, !aop, aop, amod1 (s, x));
4689 TRACE_DECODE (cpu, "R%i = A%i:%#"PRIx64" + A%i:%#"PRIx64", "
4690 "R%i = A%i:%#"PRIx64" - A%i:%#"PRIx64"%s",
4691 dst1, !aop, aop ? acc0 : acc1, aop, aop ? acc1 : acc0,
4692 dst0, !aop, aop ? acc0 : acc1, aop, aop ? acc1 : acc0,
4693 amod1 (s, x));
4694
4695 if (dst0 == dst1)
4696 illegal_instruction_combination (cpu);
4697
4698 val1 = acc0 + acc1;
4699 if (aop)
4700 val0 = acc0 - acc1;
4701 else
4702 val0 = acc1 - acc0;
4703
4704 sval0 = saturate_s32 (val0, &sat);
4705 sat_i = sat;
4706 sval1 = saturate_s32 (val1, &sat);
4707 sat_i |= sat;
4708 if (s)
4709 {
4710 val0 = sval0;
4711 val1 = sval1;
4712 }
4713
4714 STORE (DREG (dst0), val0);
4715 STORE (DREG (dst1), val1);
4716 SET_ASTATREG (v, sat_i);
4717 if (sat_i)
4718 SET_ASTATREG (vs, sat_i);
4719 SET_ASTATREG (an, val0 & 0x80000000 || val1 & 0x80000000);
4720 SET_ASTATREG (az, val0 == 0 || val1 == 0);
4721 SET_ASTATREG (ac1, (bu40)~acc0 < (bu40)acc1);
4722 if (aop)
4723 SET_ASTATREG (ac0, !!((bu40)acc1 <= (bu40)acc0));
4724 else
4725 SET_ASTATREG (ac0, !!((bu40)acc0 <= (bu40)acc1));
4726 }
4727 else if (aop == 0 && aopcde == 18)
4728 {
4729 bu40 acc0 = get_extended_acc (cpu, 0);
4730 bu40 acc1 = get_extended_acc (cpu, 1);
4731 bu32 s0L = DREG (src0);
4732 bu32 s0H = DREG (src0 + 1);
4733 bu32 s1L = DREG (src1);
4734 bu32 s1H = DREG (src1 + 1);
4735 bu32 s0, s1;
4736 bs16 tmp0, tmp1, tmp2, tmp3;
4737
4738 /* This instruction is only defined for register pairs R1:0 and R3:2. */
4739 if (!((src0 == 0 || src0 == 2) && (src1 == 0 || src1 == 2)))
4740 illegal_instruction (cpu);
4741
4742 TRACE_INSN (cpu, "SAA (R%i:%i, R%i:%i)%s", src0 + 1, src0,
4743 src1 + 1, src1, s ? " (R)" :"");
4744
4745 /* Bit s determines the order of the two registers from a pair:
4746 if s=0 the low-order bytes come from the low reg in the pair,
4747 and if s=1 the low-order bytes come from the high reg. */
4748
4749 if (s)
4750 {
4751 s0 = algn (s0H, s0L, IREG (0) & 3);
4752 s1 = algn (s1H, s1L, IREG (1) & 3);
4753 }
4754 else
4755 {
4756 s0 = algn (s0L, s0H, IREG (0) & 3);
4757 s1 = algn (s1L, s1H, IREG (1) & 3);
4758 }
4759
4760 /* Find the absolute difference between pairs, make it
4761 absolute, then add it to the existing accumulator half. */
4762 /* Byte 0 */
4763 tmp0 = ((s0 << 24) >> 24) - ((s1 << 24) >> 24);
4764 tmp1 = ((s0 << 16) >> 24) - ((s1 << 16) >> 24);
4765 tmp2 = ((s0 << 8) >> 24) - ((s1 << 8) >> 24);
4766 tmp3 = ((s0 << 0) >> 24) - ((s1 << 0) >> 24);
4767
4768 tmp0 = (tmp0 < 0) ? -tmp0 : tmp0;
4769 tmp1 = (tmp1 < 0) ? -tmp1 : tmp1;
4770 tmp2 = (tmp2 < 0) ? -tmp2 : tmp2;
4771 tmp3 = (tmp3 < 0) ? -tmp3 : tmp3;
4772
4773 s0L = saturate_u16 ((bu32)tmp0 + ((acc0 >> 0) & 0xffff), 0);
4774 s0H = saturate_u16 ((bu32)tmp1 + ((acc0 >> 16) & 0xffff), 0);
4775 s1L = saturate_u16 ((bu32)tmp2 + ((acc1 >> 0) & 0xffff), 0);
4776 s1H = saturate_u16 ((bu32)tmp3 + ((acc1 >> 16) & 0xffff), 0);
4777
4778 STORE (AWREG (0), (s0H << 16) | (s0L & 0xFFFF));
4779 STORE (AXREG (0), 0);
4780 STORE (AWREG (1), (s1H << 16) | (s1L & 0xFFFF));
4781 STORE (AXREG (1), 0);
4782 }
4783 else if (aop == 3 && aopcde == 18)
4784 {
4785 TRACE_INSN (cpu, "DISALGNEXCPT");
4786 DIS_ALGN_EXPT |= 1;
4787 }
4788 else if ((aop == 0 || aop == 1) && aopcde == 20)
4789 {
4790 bu32 s0, s0L, s0H, s1, s1L, s1H;
4791 const char * const opts[] = { "", " (R)", " (T)", " (T, R)" };
4792
4793 TRACE_INSN (cpu, "R%i = BYTEOP1P (R%i:%i, R%i:%i)%s;", dst0,
4794 src0 + 1, src0, src1 + 1, src1, opts[s + (aop << 1)]);
4795
4796 s0L = DREG (src0);
4797 s0H = DREG (src0 + 1);
4798 s1L = DREG (src1);
4799 s1H = DREG (src1 + 1);
4800 if (s)
4801 {
4802 s0 = algn (s0H, s0L, IREG (0) & 3);
4803 s1 = algn (s1H, s1L, IREG (1) & 3);
4804 }
4805 else
4806 {
4807 s0 = algn (s0L, s0H, IREG (0) & 3);
4808 s1 = algn (s1L, s1H, IREG (1) & 3);
4809 }
4810
4811 SET_DREG (dst0,
4812 (((((s0 >> 0) & 0xff) + ((s1 >> 0) & 0xff) + !aop) >> 1) << 0) |
4813 (((((s0 >> 8) & 0xff) + ((s1 >> 8) & 0xff) + !aop) >> 1) << 8) |
4814 (((((s0 >> 16) & 0xff) + ((s1 >> 16) & 0xff) + !aop) >> 1) << 16) |
4815 (((((s0 >> 24) & 0xff) + ((s1 >> 24) & 0xff) + !aop) >> 1) << 24));
4816 }
4817 else if (aop == 0 && aopcde == 21)
4818 {
4819 bu32 s0, s0L, s0H, s1, s1L, s1H;
4820
4821 TRACE_INSN (cpu, "(R%i, R%i) = BYTEOP16P (R%i:%i, R%i:%i)%s;", dst1, dst0,
4822 src0 + 1, src0, src1 + 1, src1, s ? " (R)" : "");
4823
4824 if (dst0 == dst1)
4825 illegal_instruction_combination (cpu);
4826
4827 s0L = DREG (src0);
4828 s0H = DREG (src0 + 1);
4829 s1L = DREG (src1);
4830 s1H = DREG (src1 + 1);
4831 if (s)
4832 {
4833 s0 = algn (s0H, s0L, IREG (0) & 3);
4834 s1 = algn (s1H, s1L, IREG (1) & 3);
4835 }
4836 else
4837 {
4838 s0 = algn (s0L, s0H, IREG (0) & 3);
4839 s1 = algn (s1L, s1H, IREG (1) & 3);
4840 }
4841
4842 SET_DREG (dst0,
4843 ((((s0 >> 0) & 0xff) + ((s1 >> 0) & 0xff)) << 0) |
4844 ((((s0 >> 8) & 0xff) + ((s1 >> 8) & 0xff)) << 16));
4845 SET_DREG (dst1,
4846 ((((s0 >> 16) & 0xff) + ((s1 >> 16) & 0xff)) << 0) |
4847 ((((s0 >> 24) & 0xff) + ((s1 >> 24) & 0xff)) << 16));
4848 }
4849 else if (aop == 1 && aopcde == 21)
4850 {
4851 bu32 s0, s0L, s0H, s1, s1L, s1H;
4852
4853 TRACE_INSN (cpu, "(R%i, R%i) = BYTEOP16M (R%i:%i, R%i:%i)%s;", dst1, dst0,
4854 src0 + 1, src0, src1 + 1, src1, s ? " (R)" : "");
4855
4856 if (dst0 == dst1)
4857 illegal_instruction_combination (cpu);
4858
4859 s0L = DREG (src0);
4860 s0H = DREG (src0 + 1);
4861 s1L = DREG (src1);
4862 s1H = DREG (src1 + 1);
4863 if (s)
4864 {
4865 s0 = algn (s0H, s0L, IREG (0) & 3);
4866 s1 = algn (s1H, s1L, IREG (1) & 3);
4867 }
4868 else
4869 {
4870 s0 = algn (s0L, s0H, IREG (0) & 3);
4871 s1 = algn (s1L, s1H, IREG (1) & 3);
4872 }
4873
4874 SET_DREG (dst0,
4875 (((((s0 >> 0) & 0xff) - ((s1 >> 0) & 0xff)) << 0) & 0xffff) |
4876 (((((s0 >> 8) & 0xff) - ((s1 >> 8) & 0xff)) << 16)));
4877 SET_DREG (dst1,
4878 (((((s0 >> 16) & 0xff) - ((s1 >> 16) & 0xff)) << 0) & 0xffff) |
4879 (((((s0 >> 24) & 0xff) - ((s1 >> 24) & 0xff)) << 16)));
4880 }
4881 else if (aop == 1 && aopcde == 7)
4882 {
4883 TRACE_INSN (cpu, "R%i = MIN (R%i, R%i);", dst0, src0, src1);
4884 SET_DREG (dst0, min32 (cpu, DREG (src0), DREG (src1)));
4885 }
4886 else if (aop == 0 && aopcde == 7)
4887 {
4888 TRACE_INSN (cpu, "R%i = MAX (R%i, R%i);", dst0, src0, src1);
4889 SET_DREG (dst0, max32 (cpu, DREG (src0), DREG (src1)));
4890 }
4891 else if (aop == 2 && aopcde == 7)
4892 {
4893 bu32 val = DREG (src0);
4894 int v;
4895
4896 TRACE_INSN (cpu, "R%i = ABS R%i;", dst0, src0);
4897
4898 if (val >> 31)
4899 val = -val;
4900 v = (val == 0x80000000);
4901 if (v)
4902 val = 0x7fffffff;
4903 SET_DREG (dst0, val);
4904
4905 SET_ASTATREG (v, v);
4906 if (v)
4907 SET_ASTATREG (vs, 1);
4908 setflags_nz (cpu, val);
4909 }
4910 else if (aop == 3 && aopcde == 7)
4911 {
4912 bu32 val = DREG (src0);
4913
4914 TRACE_INSN (cpu, "R%i = - R%i %s;", dst0, src0, amod1 (s, 0));
4915
4916 if (s && val == 0x80000000)
4917 {
4918 val = 0x7fffffff;
4919 SET_ASTATREG (v, 1);
4920 SET_ASTATREG (vs, 1);
4921 }
4922 else if (val == 0x80000000)
4923 val = 0x80000000;
4924 else
4925 val = -val;
4926 SET_DREG (dst0, val);
4927
4928 SET_ASTATREG (az, val == 0);
4929 SET_ASTATREG (an, val & 0x80000000);
4930 }
4931 else if (aop == 2 && aopcde == 6)
4932 {
4933 bu32 in = DREG (src0);
4934 bu32 hi = (in & 0x80000000 ? (bu32)-(bs16)(in >> 16) : in >> 16) << 16;
4935 bu32 lo = (in & 0x8000 ? (bu32)-(bs16)(in & 0xFFFF) : in) & 0xFFFF;
4936 int v;
4937
4938 TRACE_INSN (cpu, "R%i = ABS R%i (V);", dst0, src0);
4939
4940 v = 0;
4941 if (hi == 0x80000000)
4942 {
4943 hi = 0x7fff0000;
4944 v = 1;
4945 }
4946 if (lo == 0x8000)
4947 {
4948 lo = 0x7fff;
4949 v = 1;
4950 }
4951 SET_DREG (dst0, hi | lo);
4952
4953 SET_ASTATREG (v, v);
4954 if (v)
4955 SET_ASTATREG (vs, 1);
4956 setflags_nz_2x16 (cpu, DREG (dst0));
4957 }
4958 else if (aop == 1 && aopcde == 6)
4959 {
4960 TRACE_INSN (cpu, "R%i = MIN (R%i, R%i) (V);", dst0, src0, src1);
4961 SET_DREG (dst0, min2x16 (cpu, DREG (src0), DREG (src1)));
4962 }
4963 else if (aop == 0 && aopcde == 6)
4964 {
4965 TRACE_INSN (cpu, "R%i = MAX (R%i, R%i) (V);", dst0, src0, src1);
4966 SET_DREG (dst0, max2x16 (cpu, DREG (src0), DREG (src1)));
4967 }
4968 else if (aop == 0 && aopcde == 24)
4969 {
4970 TRACE_INSN (cpu, "R%i = BYTEPACK (R%i, R%i);", dst0, src0, src1);
4971 SET_DREG (dst0,
4972 (((DREG (src0) >> 0) & 0xff) << 0) |
4973 (((DREG (src0) >> 16) & 0xff) << 8) |
4974 (((DREG (src1) >> 0) & 0xff) << 16) |
4975 (((DREG (src1) >> 16) & 0xff) << 24));
4976 }
4977 else if (aop == 1 && aopcde == 24)
4978 {
4979 int order, lo, hi;
4980 bu64 comb_src;
4981 bu8 bytea, byteb, bytec, byted;
4982
4983 TRACE_INSN (cpu, "(R%i, R%i) = BYTEUNPACK R%i:%i%s;",
4984 dst1, dst0, src0 + 1, src0, s ? " (R)" : "");
4985
4986 if (dst0 == dst1)
4987 illegal_instruction_combination (cpu);
4988
4989 order = IREG (0) & 0x3;
4990 if (s)
4991 hi = src0, lo = src0 + 1;
4992 else
4993 hi = src0 + 1, lo = src0;
4994 comb_src = (((bu64)DREG (hi)) << 32) | DREG (lo);
4995 bytea = (comb_src >> (0 + 8 * order));
4996 byteb = (comb_src >> (8 + 8 * order));
4997 bytec = (comb_src >> (16 + 8 * order));
4998 byted = (comb_src >> (24 + 8 * order));
4999 SET_DREG (dst0, bytea | ((bu32)byteb << 16));
5000 SET_DREG (dst1, bytec | ((bu32)byted << 16));
5001 }
5002 else if (aopcde == 13)
5003 {
5004 const char *searchmodes[] = { "GT", "GE", "LT", "LE" };
5005 bool up_hi, up_lo;
5006 bs16 a0_lo, a1_lo, src_hi, src_lo;
5007
5008 TRACE_INSN (cpu, "(R%i, R%i) = SEARCH R%i (%s);",
5009 dst1, dst0, src0, searchmodes[aop]);
5010
5011 if (dst0 == dst1)
5012 illegal_instruction_combination (cpu);
5013
5014 up_hi = up_lo = false;
5015 a0_lo = AWREG (0);
5016 a1_lo = AWREG (1);
5017 src_lo = DREG (src0);
5018 src_hi = DREG (src0) >> 16;
5019
5020 switch (aop)
5021 {
5022 case 0:
5023 up_hi = (src_hi > a1_lo);
5024 up_lo = (src_lo > a0_lo);
5025 break;
5026 case 1:
5027 up_hi = (src_hi >= a1_lo);
5028 up_lo = (src_lo >= a0_lo);
5029 break;
5030 case 2:
5031 up_hi = (src_hi < a1_lo);
5032 up_lo = (src_lo < a0_lo);
5033 break;
5034 case 3:
5035 up_hi = (src_hi <= a1_lo);
5036 up_lo = (src_lo <= a0_lo);
5037 break;
5038 }
5039
5040 if (up_hi)
5041 {
5042 SET_AREG (1, src_hi);
5043 SET_DREG (dst1, PREG (0));
5044 }
5045 else
5046 SET_AREG (1, a1_lo);
5047
5048 if (up_lo)
5049 {
5050 SET_AREG (0, src_lo);
5051 SET_DREG (dst0, PREG (0));
5052 }
5053 else
5054 SET_AREG (0, a0_lo);
5055 }
5056 else
5057 illegal_instruction (cpu);
5058 }
5059
5060 static void
decode_dsp32shift_0(SIM_CPU * cpu,bu16 iw0,bu16 iw1)5061 decode_dsp32shift_0 (SIM_CPU *cpu, bu16 iw0, bu16 iw1)
5062 {
5063 /* dsp32shift
5064 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
5065 | 1 | 1 | 0 | 0 |.M.| 1 | 1 | 0 | 0 | - | - |.sopcde............|
5066 |.sop...|.HLs...|.dst0......| - | - | - |.src0......|.src1......|
5067 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
5068 int HLs = ((iw1 >> DSP32Shift_HLs_bits) & DSP32Shift_HLs_mask);
5069 int sop = ((iw1 >> DSP32Shift_sop_bits) & DSP32Shift_sop_mask);
5070 int src0 = ((iw1 >> DSP32Shift_src0_bits) & DSP32Shift_src0_mask);
5071 int src1 = ((iw1 >> DSP32Shift_src1_bits) & DSP32Shift_src1_mask);
5072 int dst0 = ((iw1 >> DSP32Shift_dst0_bits) & DSP32Shift_dst0_mask);
5073 int sopcde = ((iw0 >> (DSP32Shift_sopcde_bits - 16)) & DSP32Shift_sopcde_mask);
5074 int M = ((iw0 >> (DSP32Shift_M_bits - 16)) & DSP32Shift_M_mask);
5075
5076 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_dsp32shift);
5077 TRACE_EXTRACT (cpu, "%s: M:%i sopcde:%i sop:%i HLs:%i dst0:%i src0:%i src1:%i",
5078 __func__, M, sopcde, sop, HLs, dst0, src0, src1);
5079
5080 if ((sop == 0 || sop == 1) && sopcde == 0)
5081 {
5082 bu16 val;
5083 bs32 shft = (bs8)(DREG (src0) << 2) >> 2;
5084
5085 TRACE_INSN (cpu, "R%i.%c = ASHIFT R%i.%c BY R%i.L%s;",
5086 dst0, HLs < 2 ? 'L' : 'H',
5087 src1, HLs & 1 ? 'H' : 'L',
5088 src0, sop == 1 ? " (S)" : "");
5089
5090 if ((HLs & 1) == 0)
5091 val = (bu16)(DREG (src1) & 0xFFFF);
5092 else
5093 val = (bu16)((DREG (src1) & 0xFFFF0000) >> 16);
5094
5095 /* Positive shift magnitudes produce Logical Left shifts.
5096 Negative shift magnitudes produce Arithmetic Right shifts. */
5097 if (shft <= 0)
5098 val = ashiftrt (cpu, val, -shft, 16);
5099 else
5100 val = lshift (cpu, val, shft, 16, sop == 1);
5101
5102 if ((HLs & 2) == 0)
5103 STORE (DREG (dst0), REG_H_L (DREG (dst0), val));
5104 else
5105 STORE (DREG (dst0), REG_H_L (val << 16, DREG (dst0)));
5106 }
5107 else if (sop == 2 && sopcde == 0)
5108 {
5109 bs32 shft = (bs8)(DREG (src0) << 2) >> 2;
5110 bu16 val;
5111
5112 TRACE_INSN (cpu, "R%i.%c = LSHIFT R%i.%c BY R%i.L;",
5113 dst0, HLs < 2 ? 'L' : 'H',
5114 src1, HLs & 1 ? 'H' : 'L', src0);
5115
5116 if ((HLs & 1) == 0)
5117 val = (bu16)(DREG (src1) & 0xFFFF);
5118 else
5119 val = (bu16)((DREG (src1) & 0xFFFF0000) >> 16);
5120
5121 if (shft < 0)
5122 val = val >> (-1 * shft);
5123 else
5124 val = val << shft;
5125
5126 if ((HLs & 2) == 0)
5127 SET_DREG (dst0, REG_H_L (DREG (dst0), val));
5128 else
5129 SET_DREG (dst0, REG_H_L (val << 16, DREG (dst0)));
5130
5131 SET_ASTATREG (az, !((val & 0xFFFF0000) == 0) || ((val & 0xFFFF) == 0));
5132 SET_ASTATREG (an, (!!(val & 0x80000000)) ^ (!!(val & 0x8000)));
5133 SET_ASTATREG (v, 0);
5134 }
5135 else if (sop == 2 && sopcde == 3 && (HLs == 1 || HLs == 0))
5136 {
5137 int shift = imm6 (DREG (src0) & 0xFFFF);
5138 bu32 cc = CCREG;
5139 bu40 acc = get_unextended_acc (cpu, HLs);
5140
5141 TRACE_INSN (cpu, "A%i = ROT A%i BY R%i.L;", HLs, HLs, src0);
5142 TRACE_DECODE (cpu, "A%i:%#"PRIx64" shift:%i CC:%i", HLs, acc, shift, cc);
5143
5144 acc = rot40 (acc, shift, &cc);
5145 SET_AREG (HLs, acc);
5146 if (shift)
5147 SET_CCREG (cc);
5148 }
5149 else if (sop == 0 && sopcde == 3 && (HLs == 0 || HLs == 1))
5150 {
5151 bs32 shft = (bs8)(DREG (src0) << 2) >> 2;
5152 bu64 val = get_extended_acc (cpu, HLs);
5153
5154 HLs = !!HLs;
5155 TRACE_INSN (cpu, "A%i = ASHIFT A%i BY R%i.L;", HLs, HLs, src0);
5156 TRACE_DECODE (cpu, "A%i:%#"PRIx64" shift:%i", HLs, val, shft);
5157
5158 if (shft <= 0)
5159 val = ashiftrt (cpu, val, -shft, 40);
5160 else
5161 val = lshift (cpu, val, shft, 40, 0);
5162
5163 STORE (AXREG (HLs), (val >> 32) & 0xff);
5164 STORE (AWREG (HLs), (val & 0xffffffff));
5165 }
5166 else if (sop == 1 && sopcde == 3 && (HLs == 0 || HLs == 1))
5167 {
5168 bs32 shft = (bs8)(DREG (src0) << 2) >> 2;
5169 bu64 val;
5170
5171 HLs = !!HLs;
5172 TRACE_INSN (cpu, "A%i = LSHIFT A%i BY R%i.L;", HLs, HLs, src0);
5173 val = get_extended_acc (cpu, HLs);
5174
5175 if (shft <= 0)
5176 val = lshiftrt (cpu, val, -shft, 40);
5177 else
5178 val = lshift (cpu, val, shft, 40, 0);
5179
5180 STORE (AXREG (HLs), (val >> 32) & 0xff);
5181 STORE (AWREG (HLs), (val & 0xffffffff));
5182 }
5183 else if ((sop == 0 || sop == 1) && sopcde == 1)
5184 {
5185 bs32 shft = (bs8)(DREG (src0) << 2) >> 2;
5186 bu16 val0, val1;
5187 bu32 astat;
5188
5189 TRACE_INSN (cpu, "R%i = ASHIFT R%i BY R%i.L (V%s);",
5190 dst0, src1, src0, sop == 1 ? ",S" : "");
5191
5192 val0 = (bu16)DREG (src1) & 0xFFFF;
5193 val1 = (bu16)((DREG (src1) & 0xFFFF0000) >> 16);
5194
5195 if (shft <= 0)
5196 {
5197 val0 = ashiftrt (cpu, val0, -shft, 16);
5198 astat = ASTAT;
5199 val1 = ashiftrt (cpu, val1, -shft, 16);
5200 }
5201 else
5202 {
5203 val0 = lshift (cpu, val0, shft, 16, sop == 1);
5204 astat = ASTAT;
5205 val1 = lshift (cpu, val1, shft, 16, sop == 1);
5206 }
5207 SET_ASTAT (ASTAT | astat);
5208 STORE (DREG (dst0), (val1 << 16) | val0);
5209 }
5210 else if ((sop == 0 || sop == 1 || sop == 2) && sopcde == 2)
5211 {
5212 /* dregs = [LA]SHIFT dregs BY dregs_lo (opt_S) */
5213 /* sop == 1 : opt_S */
5214 bu32 v = DREG (src1);
5215 /* LSHIFT uses sign extended low 6 bits of dregs_lo. */
5216 bs32 shft = (bs8)(DREG (src0) << 2) >> 2;
5217
5218 TRACE_INSN (cpu, "R%i = %cSHIFT R%i BY R%i.L%s;", dst0,
5219 shft && sop != 2 ? 'A' : 'L', src1, src0,
5220 sop == 1 ? " (S)" : "");
5221
5222 if (shft < 0)
5223 {
5224 if (sop == 2)
5225 STORE (DREG (dst0), lshiftrt (cpu, v, -shft, 32));
5226 else
5227 STORE (DREG (dst0), ashiftrt (cpu, v, -shft, 32));
5228 }
5229 else
5230 STORE (DREG (dst0), lshift (cpu, v, shft, 32, sop == 1));
5231 }
5232 else if (sop == 3 && sopcde == 2)
5233 {
5234 int shift = imm6 (DREG (src0) & 0xFFFF);
5235 bu32 src = DREG (src1);
5236 bu32 ret, cc = CCREG;
5237
5238 TRACE_INSN (cpu, "R%i = ROT R%i BY R%i.L;", dst0, src1, src0);
5239 TRACE_DECODE (cpu, "R%i:%#x R%i:%#x shift:%i CC:%i",
5240 dst0, DREG (dst0), src1, src, shift, cc);
5241
5242 ret = rot32 (src, shift, &cc);
5243 STORE (DREG (dst0), ret);
5244 if (shift)
5245 SET_CCREG (cc);
5246 }
5247 else if (sop == 2 && sopcde == 1)
5248 {
5249 bs32 shft = (bs8)(DREG (src0) << 2) >> 2;
5250 bu16 val0, val1;
5251 bu32 astat;
5252
5253 TRACE_INSN (cpu, "R%i = LSHIFT R%i BY R%i.L (V);", dst0, src1, src0);
5254
5255 val0 = (bu16)DREG (src1) & 0xFFFF;
5256 val1 = (bu16)((DREG (src1) & 0xFFFF0000) >> 16);
5257
5258 if (shft <= 0)
5259 {
5260 val0 = lshiftrt (cpu, val0, -shft, 16);
5261 astat = ASTAT;
5262 val1 = lshiftrt (cpu, val1, -shft, 16);
5263 }
5264 else
5265 {
5266 val0 = lshift (cpu, val0, shft, 16, 0);
5267 astat = ASTAT;
5268 val1 = lshift (cpu, val1, shft, 16, 0);
5269 }
5270 SET_ASTAT (ASTAT | astat);
5271 STORE (DREG (dst0), (val1 << 16) | val0);
5272 }
5273 else if (sopcde == 4)
5274 {
5275 bu32 sv0 = DREG (src0);
5276 bu32 sv1 = DREG (src1);
5277 TRACE_INSN (cpu, "R%i = PACK (R%i.%c, R%i.%c);", dst0,
5278 src1, sop & 2 ? 'H' : 'L',
5279 src0, sop & 1 ? 'H' : 'L');
5280 if (sop & 1)
5281 sv0 >>= 16;
5282 if (sop & 2)
5283 sv1 >>= 16;
5284 SET_DREG (dst0, (sv1 << 16) | (sv0 & 0xFFFF));
5285 }
5286 else if (sop == 0 && sopcde == 5)
5287 {
5288 bu32 sv1 = DREG (src1);
5289 TRACE_INSN (cpu, "R%i.L = SIGNBITS R%i;", dst0, src1);
5290 SET_DREG_L (dst0, signbits (sv1, 32));
5291 }
5292 else if (sop == 1 && sopcde == 5)
5293 {
5294 bu32 sv1 = DREG (src1);
5295 TRACE_INSN (cpu, "R%i.L = SIGNBITS R%i.L;", dst0, src1);
5296 SET_DREG_L (dst0, signbits (sv1, 16));
5297 }
5298 else if (sop == 2 && sopcde == 5)
5299 {
5300 bu32 sv1 = DREG (src1);
5301 TRACE_INSN (cpu, "R%i.L = SIGNBITS R%i.H;", dst0, src1);
5302 SET_DREG_L (dst0, signbits (sv1 >> 16, 16));
5303 }
5304 else if ((sop == 0 || sop == 1) && sopcde == 6)
5305 {
5306 bu64 acc = AXREG (sop);
5307 TRACE_INSN (cpu, "R%i.L = SIGNBITS A%i;", dst0, sop);
5308 acc <<= 32;
5309 acc |= AWREG (sop);
5310 SET_DREG_L (dst0, signbits (acc, 40) & 0xFFFF);
5311 }
5312 else if (sop == 3 && sopcde == 6)
5313 {
5314 bu32 v = ones (DREG (src1));
5315 TRACE_INSN (cpu, "R%i.L = ONES R%i;", dst0, src1);
5316 SET_DREG_L (dst0, v);
5317 }
5318 else if (sop == 0 && sopcde == 7)
5319 {
5320 bu16 sv1 = (bu16)signbits (DREG (src1), 32);
5321 bu16 sv0 = (bu16)DREG (src0);
5322 bu16 dst_lo;
5323
5324 TRACE_INSN (cpu, "R%i.L = EXPADJ (R%i, R%i.L);", dst0, src1, src0);
5325
5326 if ((sv1 & 0x1f) < (sv0 & 0x1f))
5327 dst_lo = sv1;
5328 else
5329 dst_lo = sv0;
5330 STORE (DREG (dst0), REG_H_L (DREG (dst0), dst_lo));
5331 }
5332 else if (sop == 1 && sopcde == 7)
5333 {
5334 /* Exponent adjust on two 16-bit inputs. Select
5335 smallest norm among 3 inputs. */
5336 bs16 src1_hi = (DREG (src1) & 0xFFFF0000) >> 16;
5337 bs16 src1_lo = (DREG (src1) & 0xFFFF);
5338 bu16 src0_lo = (DREG (src0) & 0xFFFF);
5339 bu16 tmp_hi, tmp_lo, tmp;
5340
5341 TRACE_INSN (cpu, "R%i.L = EXPADJ (R%i, R%i.L) (V);", dst0, src1, src0);
5342
5343 tmp_hi = signbits (src1_hi, 16);
5344 tmp_lo = signbits (src1_lo, 16);
5345
5346 if ((tmp_hi & 0xf) < (tmp_lo & 0xf))
5347 if ((tmp_hi & 0xf) < (src0_lo & 0xf))
5348 tmp = tmp_hi;
5349 else
5350 tmp = src0_lo;
5351 else
5352 if ((tmp_lo & 0xf) < (src0_lo & 0xf))
5353 tmp = tmp_lo;
5354 else
5355 tmp = src0_lo;
5356 STORE (DREG (dst0), REG_H_L (DREG (dst0), tmp));
5357 }
5358 else if (sop == 2 && sopcde == 7)
5359 {
5360 /* Exponent adjust on single 16-bit register. */
5361 bu16 tmp;
5362 bu16 src0_lo = (bu16)(DREG (src0) & 0xFFFF);
5363
5364 TRACE_INSN (cpu, "R%i.L = EXPADJ (R%i.L, R%i.L);", dst0, src1, src0);
5365
5366 tmp = signbits (DREG (src1) & 0xFFFF, 16);
5367
5368 if ((tmp & 0xf) < (src0_lo & 0xf))
5369 SET_DREG_L (dst0, tmp);
5370 else
5371 SET_DREG_L (dst0, src0_lo);
5372 }
5373 else if (sop == 3 && sopcde == 7)
5374 {
5375 bu16 tmp;
5376 bu16 src0_lo = (bu16)(DREG (src0) & 0xFFFF);
5377
5378 TRACE_INSN (cpu, "R%i.L = EXPADJ (R%i.H, R%i.L);", dst0, src1, src0);
5379
5380 tmp = signbits ((DREG (src1) & 0xFFFF0000) >> 16, 16);
5381
5382 if ((tmp & 0xf) < (src0_lo & 0xf))
5383 SET_DREG_L (dst0, tmp);
5384 else
5385 SET_DREG_L (dst0, src0_lo);
5386 }
5387 else if (sop == 0 && sopcde == 8)
5388 {
5389 bu64 acc = get_unextended_acc (cpu, 0);
5390 bu32 s0, s1;
5391
5392 TRACE_INSN (cpu, "BITMUX (R%i, R%i, A0) (ASR);", src0, src1);
5393
5394 if (src0 == src1)
5395 illegal_instruction_combination (cpu);
5396
5397 s0 = DREG (src0);
5398 s1 = DREG (src1);
5399 acc = (acc >> 2) |
5400 (((bu64)s0 & 1) << 38) |
5401 (((bu64)s1 & 1) << 39);
5402 SET_DREG (src0, s0 >> 1);
5403 SET_DREG (src1, s1 >> 1);
5404
5405 SET_AREG (0, acc);
5406 }
5407 else if (sop == 1 && sopcde == 8)
5408 {
5409 bu64 acc = get_unextended_acc (cpu, 0);
5410 bu32 s0, s1;
5411
5412 TRACE_INSN (cpu, "BITMUX (R%i, R%i, A0) (ASL);", src0, src1);
5413
5414 if (src0 == src1)
5415 illegal_instruction_combination (cpu);
5416
5417 s0 = DREG (src0);
5418 s1 = DREG (src1);
5419 acc = (acc << 2) |
5420 ((s0 >> 31) & 1) |
5421 ((s1 >> 30) & 2);
5422 SET_DREG (src0, s0 << 1);
5423 SET_DREG (src1, s1 << 1);
5424
5425 SET_AREG (0, acc);
5426 }
5427 else if ((sop == 0 || sop == 1) && sopcde == 9)
5428 {
5429 bs40 acc0 = get_unextended_acc (cpu, 0);
5430 bs16 sL, sH, out;
5431
5432 TRACE_INSN (cpu, "R%i.L = VIT_MAX (R%i) (AS%c);",
5433 dst0, src1, sop & 1 ? 'R' : 'L');
5434
5435 sL = DREG (src1);
5436 sH = DREG (src1) >> 16;
5437
5438 if (sop & 1)
5439 acc0 = (acc0 & 0xfeffffffffull) >> 1;
5440 else
5441 acc0 <<= 1;
5442
5443 if (((sH - sL) & 0x8000) == 0)
5444 {
5445 out = sH;
5446 acc0 |= (sop & 1) ? 0x80000000 : 1;
5447 }
5448 else
5449 out = sL;
5450
5451 SET_AREG (0, acc0);
5452 SET_DREG (dst0, REG_H_L (DREG (dst0), out));
5453 }
5454 else if ((sop == 2 || sop == 3) && sopcde == 9)
5455 {
5456 bs40 acc0 = get_extended_acc (cpu, 0);
5457 bs16 s0L, s0H, s1L, s1H, out0, out1;
5458
5459 TRACE_INSN (cpu, "R%i = VIT_MAX (R%i, R%i) (AS%c);",
5460 dst0, src1, src0, sop & 1 ? 'R' : 'L');
5461
5462 s0L = DREG (src0);
5463 s0H = DREG (src0) >> 16;
5464 s1L = DREG (src1);
5465 s1H = DREG (src1) >> 16;
5466
5467 if (sop & 1)
5468 acc0 >>= 2;
5469 else
5470 acc0 <<= 2;
5471
5472 if (((s0H - s0L) & 0x8000) == 0)
5473 {
5474 out0 = s0H;
5475 acc0 |= (sop & 1) ? 0x40000000 : 2;
5476 }
5477 else
5478 out0 = s0L;
5479
5480 if (((s1H - s1L) & 0x8000) == 0)
5481 {
5482 out1 = s1H;
5483 acc0 |= (sop & 1) ? 0x80000000 : 1;
5484 }
5485 else
5486 out1 = s1L;
5487
5488 SET_AREG (0, acc0);
5489 SET_DREG (dst0, REG_H_L (out1 << 16, out0));
5490 }
5491 else if (sop == 0 && sopcde == 10)
5492 {
5493 bu32 v = DREG (src0);
5494 bu32 x = DREG (src1);
5495 bu32 mask = (1 << (v & 0x1f)) - 1;
5496 TRACE_INSN (cpu, "R%i = EXTRACT (R%i, R%i.L) (Z);", dst0, src1, src0);
5497 x >>= ((v >> 8) & 0x1f);
5498 SET_DREG (dst0, x & mask);
5499 setflags_logical (cpu, DREG (dst0));
5500 }
5501 else if (sop == 1 && sopcde == 10)
5502 {
5503 bu32 v = DREG (src0);
5504 bu32 x = DREG (src1);
5505 bu32 sgn = (1 << (v & 0x1f)) >> 1;
5506 bu32 mask = (1 << (v & 0x1f)) - 1;
5507 TRACE_INSN (cpu, "R%i = EXTRACT (R%i, R%i.L) (X);", dst0, src1, src0);
5508 x >>= ((v >> 8) & 0x1f);
5509 x &= mask;
5510 if (x & sgn)
5511 x |= ~mask;
5512 SET_DREG (dst0, x);
5513 setflags_logical (cpu, DREG (dst0));
5514 }
5515 else if ((sop == 2 || sop == 3) && sopcde == 10)
5516 {
5517 /* The first dregs is the "background" while the second dregs is the
5518 "foreground". The fg reg is used to overlay the bg reg and is:
5519 | nnnn nnnn | nnnn nnnn | xxxp pppp | xxxL LLLL |
5520 n = the fg bit field
5521 p = bit position in bg reg to start LSB of fg field
5522 L = number of fg bits to extract
5523 Using (X) sign-extends the fg bit field. */
5524 bu32 fg = DREG (src0);
5525 bu32 bg = DREG (src1);
5526 bu32 len = fg & 0x1f;
5527 bu32 mask = (1 << MIN (16, len)) - 1;
5528 bu32 fgnd = (fg >> 16) & mask;
5529 int shft = ((fg >> 8) & 0x1f);
5530
5531 TRACE_INSN (cpu, "R%i = DEPOSIT (R%i, R%i)%s;", dst0, src1, src0,
5532 sop == 3 ? " (X)" : "");
5533
5534 if (sop == 3)
5535 {
5536 /* Sign extend the fg bit field. */
5537 mask = -1;
5538 fgnd = ((bs32)(bs16)(fgnd << (16 - len))) >> (16 - len);
5539 }
5540 fgnd <<= shft;
5541 mask <<= shft;
5542 bg &= ~mask;
5543
5544 SET_DREG (dst0, bg | fgnd);
5545 setflags_logical (cpu, DREG (dst0));
5546 }
5547 else if (sop == 0 && sopcde == 11)
5548 {
5549 bu64 acc0 = get_unextended_acc (cpu, 0);
5550
5551 TRACE_INSN (cpu, "R%i.L = CC = BXORSHIFT (A0, R%i);", dst0, src0);
5552
5553 acc0 <<= 1;
5554 SET_CCREG (xor_reduce (acc0, DREG (src0)));
5555 SET_DREG (dst0, REG_H_L (DREG (dst0), CCREG));
5556 SET_AREG (0, acc0);
5557 }
5558 else if (sop == 1 && sopcde == 11)
5559 {
5560 bu64 acc0 = get_unextended_acc (cpu, 0);
5561
5562 TRACE_INSN (cpu, "R%i.L = CC = BXOR (A0, R%i);", dst0, src0);
5563
5564 SET_CCREG (xor_reduce (acc0, DREG (src0)));
5565 SET_DREG (dst0, REG_H_L (DREG (dst0), CCREG));
5566 }
5567 else if (sop == 0 && sopcde == 12)
5568 {
5569 bu64 acc0 = get_unextended_acc (cpu, 0);
5570 bu64 acc1 = get_unextended_acc (cpu, 1);
5571
5572 TRACE_INSN (cpu, "A0 = BXORSHIFT (A0, A1, CC);");
5573
5574 acc0 = (acc0 << 1) | (CCREG ^ xor_reduce (acc0, acc1));
5575 SET_AREG (0, acc0);
5576 }
5577 else if (sop == 1 && sopcde == 12)
5578 {
5579 bu64 acc0 = get_unextended_acc (cpu, 0);
5580 bu64 acc1 = get_unextended_acc (cpu, 1);
5581
5582 TRACE_INSN (cpu, "R%i.L = CC = BXOR (A0, A1, CC);", dst0);
5583
5584 SET_CCREG (CCREG ^ xor_reduce (acc0, acc1));
5585 acc0 = (acc0 << 1) | CCREG;
5586 SET_DREG (dst0, REG_H_L (DREG (dst0), CCREG));
5587 }
5588 else if ((sop == 0 || sop == 1 || sop == 2) && sopcde == 13)
5589 {
5590 int shift = (sop + 1) * 8;
5591 TRACE_INSN (cpu, "R%i = ALIGN%i (R%i, R%i);", dst0, shift, src1, src0);
5592 SET_DREG (dst0, (DREG (src1) << (32 - shift)) | (DREG (src0) >> shift));
5593 }
5594 else
5595 illegal_instruction (cpu);
5596 }
5597
5598 static void
decode_dsp32shiftimm_0(SIM_CPU * cpu,bu16 iw0,bu16 iw1)5599 decode_dsp32shiftimm_0 (SIM_CPU *cpu, bu16 iw0, bu16 iw1)
5600 {
5601 /* dsp32shiftimm
5602 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
5603 | 1 | 1 | 0 | 0 |.M.| 1 | 1 | 0 | 1 | - | - |.sopcde............|
5604 |.sop...|.HLs...|.dst0......|.immag.................|.src1......|
5605 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
5606 int src1 = ((iw1 >> DSP32ShiftImm_src1_bits) & DSP32ShiftImm_src1_mask);
5607 int sop = ((iw1 >> DSP32ShiftImm_sop_bits) & DSP32ShiftImm_sop_mask);
5608 int bit8 = ((iw1 >> 8) & 0x1);
5609 int immag = ((iw1 >> DSP32ShiftImm_immag_bits) & DSP32ShiftImm_immag_mask);
5610 int newimmag = (-(iw1 >> DSP32ShiftImm_immag_bits) & DSP32ShiftImm_immag_mask);
5611 int dst0 = ((iw1 >> DSP32ShiftImm_dst0_bits) & DSP32ShiftImm_dst0_mask);
5612 int M = ((iw0 >> (DSP32ShiftImm_M_bits - 16)) & DSP32ShiftImm_M_mask);
5613 int sopcde = ((iw0 >> (DSP32ShiftImm_sopcde_bits - 16)) & DSP32ShiftImm_sopcde_mask);
5614 int HLs = ((iw1 >> DSP32ShiftImm_HLs_bits) & DSP32ShiftImm_HLs_mask);
5615
5616 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_dsp32shiftimm);
5617 TRACE_EXTRACT (cpu, "%s: M:%i sopcde:%i sop:%i HLs:%i dst0:%i immag:%#x src1:%i",
5618 __func__, M, sopcde, sop, HLs, dst0, immag, src1);
5619
5620 if (sopcde == 0)
5621 {
5622 bu16 in = DREG (src1) >> ((HLs & 1) ? 16 : 0);
5623 bu16 result;
5624 bu32 v;
5625
5626 if (sop == 0)
5627 {
5628 TRACE_INSN (cpu, "R%i.%c = R%i.%c >>> %i;",
5629 dst0, (HLs & 2) ? 'H' : 'L',
5630 src1, (HLs & 1) ? 'H' : 'L', newimmag);
5631 result = ashiftrt (cpu, in, newimmag, 16);
5632 }
5633 else if (sop == 1 && bit8 == 0)
5634 {
5635 TRACE_INSN (cpu, "R%i.%c = R%i.%c << %i (S);",
5636 dst0, (HLs & 2) ? 'H' : 'L',
5637 src1, (HLs & 1) ? 'H' : 'L', immag);
5638 result = lshift (cpu, in, immag, 16, 1);
5639 }
5640 else if (sop == 1 && bit8)
5641 {
5642 TRACE_INSN (cpu, "R%i.%c = R%i.%c >>> %i (S);",
5643 dst0, (HLs & 2) ? 'H' : 'L',
5644 src1, (HLs & 1) ? 'H' : 'L', immag);
5645 result = lshift (cpu, in, immag, 16, 1);
5646 }
5647 else if (sop == 2 && bit8)
5648 {
5649 TRACE_INSN (cpu, "R%i.%c = R%i.%c >> %i;",
5650 dst0, (HLs & 2) ? 'H' : 'L',
5651 src1, (HLs & 1) ? 'H' : 'L', newimmag);
5652 result = lshiftrt (cpu, in, newimmag, 16);
5653 }
5654 else if (sop == 2 && bit8 == 0)
5655 {
5656 TRACE_INSN (cpu, "R%i.%c = R%i.%c << %i;",
5657 dst0, (HLs & 2) ? 'H' : 'L',
5658 src1, (HLs & 1) ? 'H' : 'L', immag);
5659 result = lshift (cpu, in, immag, 16, 0);
5660 }
5661 else
5662 illegal_instruction (cpu);
5663
5664 v = DREG (dst0);
5665 if (HLs & 2)
5666 STORE (DREG (dst0), (v & 0xFFFF) | (result << 16));
5667 else
5668 STORE (DREG (dst0), (v & 0xFFFF0000) | result);
5669 }
5670 else if (sop == 2 && sopcde == 3 && (HLs == 1 || HLs == 0))
5671 {
5672 int shift = imm6 (immag);
5673 bu32 cc = CCREG;
5674 bu40 acc = get_unextended_acc (cpu, HLs);
5675
5676 TRACE_INSN (cpu, "A%i = ROT A%i BY %i;", HLs, HLs, shift);
5677 TRACE_DECODE (cpu, "A%i:%#"PRIx64" shift:%i CC:%i", HLs, acc, shift, cc);
5678
5679 acc = rot40 (acc, shift, &cc);
5680 SET_AREG (HLs, acc);
5681 if (shift)
5682 SET_CCREG (cc);
5683 }
5684 else if (sop == 0 && sopcde == 3 && bit8 == 1)
5685 {
5686 /* Arithmetic shift, so shift in sign bit copies. */
5687 bu64 acc;
5688 int shift = uimm5 (newimmag);
5689 HLs = !!HLs;
5690
5691 TRACE_INSN (cpu, "A%i = A%i >>> %i;", HLs, HLs, shift);
5692
5693 acc = get_extended_acc (cpu, HLs);
5694 acc >>= shift;
5695 /* Sign extend again. */
5696 if (acc & (1ULL << 39))
5697 acc |= -(1ULL << 39);
5698 else
5699 acc &= ~(-(1ULL << 39));
5700
5701 STORE (AXREG (HLs), (acc >> 32) & 0xFF);
5702 STORE (AWREG (HLs), acc & 0xFFFFFFFF);
5703 }
5704 else if ((sop == 0 && sopcde == 3 && bit8 == 0)
5705 || (sop == 1 && sopcde == 3))
5706 {
5707 bu64 acc;
5708 int shiftup = uimm5 (immag);
5709 int shiftdn = uimm5 (newimmag);
5710 HLs = !!HLs;
5711
5712 TRACE_INSN (cpu, "A%i = A%i %s %i;", HLs, HLs,
5713 sop == 0 ? "<<" : ">>",
5714 sop == 0 ? shiftup : shiftdn);
5715
5716 acc = AXREG (HLs);
5717 /* Logical shift, so shift in zeroes. */
5718 acc &= 0xFF;
5719 acc <<= 32;
5720 acc |= AWREG (HLs);
5721
5722 if (sop == 0)
5723 acc <<= shiftup;
5724 else
5725 acc >>= shiftdn;
5726
5727 SET_AREG (HLs, acc);
5728 SET_ASTATREG (an, !!(acc & 0x8000000000ull));
5729 SET_ASTATREG (az, acc == 0);
5730 }
5731 else if (sop == 1 && sopcde == 1 && bit8 == 0)
5732 {
5733 int count = imm5 (immag);
5734 bu16 val0 = DREG (src1) >> 16;
5735 bu16 val1 = DREG (src1) & 0xFFFF;
5736 bu32 astat;
5737
5738 TRACE_INSN (cpu, "R%i = R%i << %i (V,S);", dst0, src1, count);
5739 val0 = lshift (cpu, val0, count, 16, 1);
5740 astat = ASTAT;
5741 val1 = lshift (cpu, val1, count, 16, 1);
5742 SET_ASTAT (ASTAT | astat);
5743
5744 STORE (DREG (dst0), (val0 << 16) | val1);
5745 }
5746 else if (sop == 2 && sopcde == 1 && bit8 == 1)
5747 {
5748 int count = imm5 (newimmag);
5749 bu16 val0 = DREG (src1) & 0xFFFF;
5750 bu16 val1 = DREG (src1) >> 16;
5751 bu32 astat;
5752
5753 TRACE_INSN (cpu, "R%i = R%i >> %i (V);", dst0, src1, count);
5754 val0 = lshiftrt (cpu, val0, count, 16);
5755 astat = ASTAT;
5756 val1 = lshiftrt (cpu, val1, count, 16);
5757 SET_ASTAT (ASTAT | astat);
5758
5759 STORE (DREG (dst0), val0 | (val1 << 16));
5760 }
5761 else if (sop == 2 && sopcde == 1 && bit8 == 0)
5762 {
5763 int count = imm5 (immag);
5764 bu16 val0 = DREG (src1) & 0xFFFF;
5765 bu16 val1 = DREG (src1) >> 16;
5766 bu32 astat;
5767
5768 TRACE_INSN (cpu, "R%i = R%i << %i (V);", dst0, src1, count);
5769 val0 = lshift (cpu, val0, count, 16, 0);
5770 astat = ASTAT;
5771 val1 = lshift (cpu, val1, count, 16, 0);
5772 SET_ASTAT (ASTAT | astat);
5773
5774 STORE (DREG (dst0), val0 | (val1 << 16));
5775 }
5776 else if (sopcde == 1 && (sop == 0 || (sop == 1 && bit8 == 1)))
5777 {
5778 int count = uimm5 (newimmag);
5779 bu16 val0 = DREG (src1) & 0xFFFF;
5780 bu16 val1 = DREG (src1) >> 16;
5781 bu32 astat;
5782
5783 TRACE_INSN (cpu, "R%i = R%i >>> %i %s;", dst0, src1, count,
5784 sop == 0 ? "(V)" : "(V,S)");
5785
5786 val0 = ashiftrt (cpu, val0, count, 16);
5787 astat = ASTAT;
5788 val1 = ashiftrt (cpu, val1, count, 16);
5789 SET_ASTAT (ASTAT | astat);
5790
5791 STORE (DREG (dst0), REG_H_L (val1 << 16, val0));
5792 }
5793 else if (sop == 1 && sopcde == 2)
5794 {
5795 int count = imm6 (immag);
5796
5797 TRACE_INSN (cpu, "R%i = R%i << %i (S);", dst0, src1, count);
5798 STORE (DREG (dst0), lshift (cpu, DREG (src1), count, 32, 1));
5799 }
5800 else if (sop == 2 && sopcde == 2)
5801 {
5802 int count = imm6 (newimmag);
5803
5804 TRACE_INSN (cpu, "R%i = R%i >> %i;", dst0, src1, count);
5805
5806 if (count < 0)
5807 STORE (DREG (dst0), lshift (cpu, DREG (src1), -count, 32, 0));
5808 else
5809 STORE (DREG (dst0), lshiftrt (cpu, DREG (src1), count, 32));
5810 }
5811 else if (sop == 3 && sopcde == 2)
5812 {
5813 int shift = imm6 (immag);
5814 bu32 src = DREG (src1);
5815 bu32 ret, cc = CCREG;
5816
5817 TRACE_INSN (cpu, "R%i = ROT R%i BY %i;", dst0, src1, shift);
5818 TRACE_DECODE (cpu, "R%i:%#x R%i:%#x shift:%i CC:%i",
5819 dst0, DREG (dst0), src1, src, shift, cc);
5820
5821 ret = rot32 (src, shift, &cc);
5822 STORE (DREG (dst0), ret);
5823 if (shift)
5824 SET_CCREG (cc);
5825 }
5826 else if (sop == 0 && sopcde == 2)
5827 {
5828 int count = imm6 (newimmag);
5829
5830 TRACE_INSN (cpu, "R%i = R%i >>> %i;", dst0, src1, count);
5831
5832 if (count < 0)
5833 STORE (DREG (dst0), lshift (cpu, DREG (src1), -count, 32, 0));
5834 else
5835 STORE (DREG (dst0), ashiftrt (cpu, DREG (src1), count, 32));
5836 }
5837 else
5838 illegal_instruction (cpu);
5839 }
5840
5841 static void
outc(SIM_CPU * cpu,char ch)5842 outc (SIM_CPU *cpu, char ch)
5843 {
5844 SIM_DESC sd = CPU_STATE (cpu);
5845 sim_io_printf (sd, "%c", ch);
5846 if (ch == '\n')
5847 sim_io_flush_stdout (sd);
5848 }
5849
5850 static void
decode_psedoDEBUG_0(SIM_CPU * cpu,bu16 iw0)5851 decode_psedoDEBUG_0 (SIM_CPU *cpu, bu16 iw0)
5852 {
5853 /* psedoDEBUG
5854 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
5855 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |.fn....|.grp.......|.reg.......|
5856 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
5857 SIM_DESC sd = CPU_STATE (cpu);
5858 int fn = ((iw0 >> PseudoDbg_fn_bits) & PseudoDbg_fn_mask);
5859 int grp = ((iw0 >> PseudoDbg_grp_bits) & PseudoDbg_grp_mask);
5860 int reg = ((iw0 >> PseudoDbg_reg_bits) & PseudoDbg_reg_mask);
5861
5862 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_psedoDEBUG);
5863 TRACE_EXTRACT (cpu, "%s: fn:%i grp:%i reg:%i", __func__, fn, grp, reg);
5864
5865 if ((reg == 0 || reg == 1) && fn == 3)
5866 {
5867 TRACE_INSN (cpu, "DBG A%i;", reg);
5868 sim_io_printf (sd, "DBG : A%i = %#"PRIx64"\n", reg,
5869 get_unextended_acc (cpu, reg));
5870 }
5871 else if (reg == 3 && fn == 3)
5872 {
5873 TRACE_INSN (cpu, "ABORT;");
5874 cec_exception (cpu, VEC_SIM_ABORT);
5875 SET_DREG (0, 1);
5876 }
5877 else if (reg == 4 && fn == 3)
5878 {
5879 TRACE_INSN (cpu, "HLT;");
5880 cec_exception (cpu, VEC_SIM_HLT);
5881 SET_DREG (0, 0);
5882 }
5883 else if (reg == 5 && fn == 3)
5884 unhandled_instruction (cpu, "DBGHALT");
5885 else if (reg == 6 && fn == 3)
5886 unhandled_instruction (cpu, "DBGCMPLX (dregs)");
5887 else if (reg == 7 && fn == 3)
5888 unhandled_instruction (cpu, "DBG");
5889 else if (grp == 0 && fn == 2)
5890 {
5891 TRACE_INSN (cpu, "OUTC R%i;", reg);
5892 outc (cpu, DREG (reg));
5893 }
5894 else if (fn == 0)
5895 {
5896 const char *reg_name = get_allreg_name (grp, reg);
5897 TRACE_INSN (cpu, "DBG %s;", reg_name);
5898 sim_io_printf (sd, "DBG : %s = 0x%08x\n", reg_name,
5899 reg_read (cpu, grp, reg));
5900 }
5901 else if (fn == 1)
5902 unhandled_instruction (cpu, "PRNT allregs");
5903 else
5904 illegal_instruction (cpu);
5905 }
5906
5907 static void
decode_psedoOChar_0(SIM_CPU * cpu,bu16 iw0)5908 decode_psedoOChar_0 (SIM_CPU *cpu, bu16 iw0)
5909 {
5910 /* psedoOChar
5911 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
5912 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 1 |.ch............................|
5913 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
5914 int ch = ((iw0 >> PseudoChr_ch_bits) & PseudoChr_ch_mask);
5915
5916 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_psedoOChar);
5917 TRACE_EXTRACT (cpu, "%s: ch:%#x", __func__, ch);
5918 TRACE_INSN (cpu, "OUTC %#x;", ch);
5919
5920 outc (cpu, ch);
5921 }
5922
5923 static void
decode_psedodbg_assert_0(SIM_CPU * cpu,bu16 iw0,bu16 iw1,bu32 pc)5924 decode_psedodbg_assert_0 (SIM_CPU *cpu, bu16 iw0, bu16 iw1, bu32 pc)
5925 {
5926 /* psedodbg_assert
5927 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+
5928 | 1 | 1 | 1 | 1 | 0 | - | - | - | dbgop |.grp.......|.regtest...|
5929 |.expected......................................................|
5930 +---+---+---+---|---+---+---+---|---+---+---+---|---+---+---+---+ */
5931 SIM_DESC sd = CPU_STATE (cpu);
5932 int expected = ((iw1 >> PseudoDbg_Assert_expected_bits) & PseudoDbg_Assert_expected_mask);
5933 int dbgop = ((iw0 >> (PseudoDbg_Assert_dbgop_bits - 16)) & PseudoDbg_Assert_dbgop_mask);
5934 int grp = ((iw0 >> (PseudoDbg_Assert_grp_bits - 16)) & PseudoDbg_Assert_grp_mask);
5935 int regtest = ((iw0 >> (PseudoDbg_Assert_regtest_bits - 16)) & PseudoDbg_Assert_regtest_mask);
5936 int offset;
5937 bu16 actual;
5938 bu32 val = reg_read (cpu, grp, regtest);
5939 const char *reg_name = get_allreg_name (grp, regtest);
5940 const char *dbg_name, *dbg_appd;
5941
5942 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_psedodbg_assert);
5943 TRACE_EXTRACT (cpu, "%s: dbgop:%i grp:%i regtest:%i expected:%#x",
5944 __func__, dbgop, grp, regtest, expected);
5945
5946 if (dbgop == 0 || dbgop == 2)
5947 {
5948 dbg_name = dbgop == 0 ? "DBGA" : "DBGAL";
5949 dbg_appd = dbgop == 0 ? ".L" : "";
5950 offset = 0;
5951 }
5952 else if (dbgop == 1 || dbgop == 3)
5953 {
5954 dbg_name = dbgop == 1 ? "DBGA" : "DBGAH";
5955 dbg_appd = dbgop == 1 ? ".H" : "";
5956 offset = 16;
5957 }
5958 else
5959 illegal_instruction (cpu);
5960
5961 actual = val >> offset;
5962
5963 TRACE_INSN (cpu, "%s (%s%s, 0x%x);", dbg_name, reg_name, dbg_appd, expected);
5964 if (actual != expected)
5965 {
5966 sim_io_printf (sd, "FAIL at %#x: %s (%s%s, 0x%04x); actual value %#x\n",
5967 pc, dbg_name, reg_name, dbg_appd, expected, actual);
5968
5969 /* Decode the actual ASTAT bits that are different. */
5970 if (grp == 4 && regtest == 6)
5971 {
5972 int i;
5973
5974 sim_io_printf (sd, "Expected ASTAT:\n");
5975 for (i = 0; i < 16; ++i)
5976 sim_io_printf (sd, " %8s%c%i%s",
5977 astat_names[i + offset],
5978 (((expected >> i) & 1) != ((actual >> i) & 1))
5979 ? '!' : ' ',
5980 (expected >> i) & 1,
5981 i == 7 ? "\n" : "");
5982 sim_io_printf (sd, "\n");
5983
5984 sim_io_printf (sd, "Actual ASTAT:\n");
5985 for (i = 0; i < 16; ++i)
5986 sim_io_printf (sd, " %8s%c%i%s",
5987 astat_names[i + offset],
5988 (((expected >> i) & 1) != ((actual >> i) & 1))
5989 ? '!' : ' ',
5990 (actual >> i) & 1,
5991 i == 7 ? "\n" : "");
5992 sim_io_printf (sd, "\n");
5993 }
5994
5995 cec_exception (cpu, VEC_SIM_DBGA);
5996 SET_DREG (0, 1);
5997 }
5998 }
5999
6000 static bu32
_interp_insn_bfin(SIM_CPU * cpu,bu32 pc)6001 _interp_insn_bfin (SIM_CPU *cpu, bu32 pc)
6002 {
6003 bu32 insn_len;
6004 bu16 iw0, iw1;
6005
6006 BFIN_CPU_STATE.multi_pc = pc;
6007 iw0 = IFETCH (pc);
6008 if ((iw0 & 0xc000) != 0xc000)
6009 {
6010 /* 16-bit opcode. */
6011 insn_len = 2;
6012 if (INSN_LEN == 0)
6013 INSN_LEN = insn_len;
6014
6015 TRACE_EXTRACT (cpu, "%s: iw0:%#x", __func__, iw0);
6016 if ((iw0 & 0xFF00) == 0x0000)
6017 decode_ProgCtrl_0 (cpu, iw0, pc);
6018 else if ((iw0 & 0xFFC0) == 0x0240)
6019 decode_CaCTRL_0 (cpu, iw0);
6020 else if ((iw0 & 0xFF80) == 0x0100)
6021 decode_PushPopReg_0 (cpu, iw0);
6022 else if ((iw0 & 0xFE00) == 0x0400)
6023 decode_PushPopMultiple_0 (cpu, iw0);
6024 else if ((iw0 & 0xFE00) == 0x0600)
6025 decode_ccMV_0 (cpu, iw0);
6026 else if ((iw0 & 0xF800) == 0x0800)
6027 decode_CCflag_0 (cpu, iw0);
6028 else if ((iw0 & 0xFFE0) == 0x0200)
6029 decode_CC2dreg_0 (cpu, iw0);
6030 else if ((iw0 & 0xFF00) == 0x0300)
6031 decode_CC2stat_0 (cpu, iw0);
6032 else if ((iw0 & 0xF000) == 0x1000)
6033 decode_BRCC_0 (cpu, iw0, pc);
6034 else if ((iw0 & 0xF000) == 0x2000)
6035 decode_UJUMP_0 (cpu, iw0, pc);
6036 else if ((iw0 & 0xF000) == 0x3000)
6037 decode_REGMV_0 (cpu, iw0);
6038 else if ((iw0 & 0xFC00) == 0x4000)
6039 decode_ALU2op_0 (cpu, iw0);
6040 else if ((iw0 & 0xFE00) == 0x4400)
6041 decode_PTR2op_0 (cpu, iw0);
6042 else if ((iw0 & 0xF800) == 0x4800)
6043 decode_LOGI2op_0 (cpu, iw0);
6044 else if ((iw0 & 0xF000) == 0x5000)
6045 decode_COMP3op_0 (cpu, iw0);
6046 else if ((iw0 & 0xF800) == 0x6000)
6047 decode_COMPI2opD_0 (cpu, iw0);
6048 else if ((iw0 & 0xF800) == 0x6800)
6049 decode_COMPI2opP_0 (cpu, iw0);
6050 else if ((iw0 & 0xF000) == 0x8000)
6051 decode_LDSTpmod_0 (cpu, iw0);
6052 else if ((iw0 & 0xFF60) == 0x9E60)
6053 decode_dagMODim_0 (cpu, iw0);
6054 else if ((iw0 & 0xFFF0) == 0x9F60)
6055 decode_dagMODik_0 (cpu, iw0);
6056 else if ((iw0 & 0xFC00) == 0x9C00)
6057 decode_dspLDST_0 (cpu, iw0);
6058 else if ((iw0 & 0xF000) == 0x9000)
6059 decode_LDST_0 (cpu, iw0);
6060 else if ((iw0 & 0xFC00) == 0xB800)
6061 decode_LDSTiiFP_0 (cpu, iw0);
6062 else if ((iw0 & 0xE000) == 0xA000)
6063 decode_LDSTii_0 (cpu, iw0);
6064 else
6065 {
6066 TRACE_EXTRACT (cpu, "%s: no matching 16-bit pattern", __func__);
6067 illegal_instruction (cpu);
6068 }
6069 return insn_len;
6070 }
6071
6072 /* Grab the next 16 bits to determine if it's a 32-bit or 64-bit opcode. */
6073 iw1 = IFETCH (pc + 2);
6074 if ((iw0 & BIT_MULTI_INS) && (iw0 & 0xe800) != 0xe800 /* not linkage */)
6075 {
6076 SIM_DESC sd = CPU_STATE (cpu);
6077 trace_prefix (sd, cpu, NULL_CIA, pc, TRACE_LINENUM_P (cpu),
6078 NULL, 0, "|| %#"PRIx64, sim_events_time (sd));
6079 insn_len = 8;
6080 }
6081 else
6082 insn_len = 4;
6083
6084 TRACE_EXTRACT (cpu, "%s: iw0:%#x iw1:%#x insn_len:%i", __func__,
6085 iw0, iw1, insn_len);
6086
6087 /* Only cache on first run through (in case of parallel insns). */
6088 if (INSN_LEN == 0)
6089 INSN_LEN = insn_len;
6090
6091 if ((iw0 & 0xf7ff) == 0xc003 && (iw1 & 0xfe00) == 0x1800)
6092 {
6093 PROFILE_COUNT_INSN (cpu, pc, BFIN_INSN_dsp32mac);
6094 TRACE_INSN (cpu, "MNOP;");
6095 }
6096 else if (((iw0 & 0xFF80) == 0xE080) && ((iw1 & 0x0C00) == 0x0000))
6097 decode_LoopSetup_0 (cpu, iw0, iw1, pc);
6098 else if (((iw0 & 0xFF00) == 0xE100) && ((iw1 & 0x0000) == 0x0000))
6099 decode_LDIMMhalf_0 (cpu, iw0, iw1);
6100 else if (((iw0 & 0xFE00) == 0xE200) && ((iw1 & 0x0000) == 0x0000))
6101 decode_CALLa_0 (cpu, iw0, iw1, pc);
6102 else if (((iw0 & 0xFC00) == 0xE400) && ((iw1 & 0x0000) == 0x0000))
6103 decode_LDSTidxI_0 (cpu, iw0, iw1);
6104 else if (((iw0 & 0xFFFE) == 0xE800) && ((iw1 & 0x0000) == 0x0000))
6105 decode_linkage_0 (cpu, iw0, iw1);
6106 else if (((iw0 & 0xF600) == 0xC000) && ((iw1 & 0x0000) == 0x0000))
6107 decode_dsp32mac_0 (cpu, iw0, iw1);
6108 else if (((iw0 & 0xF600) == 0xC200) && ((iw1 & 0x0000) == 0x0000))
6109 decode_dsp32mult_0 (cpu, iw0, iw1);
6110 else if (((iw0 & 0xF7C0) == 0xC400) && ((iw1 & 0x0000) == 0x0000))
6111 decode_dsp32alu_0 (cpu, iw0, iw1);
6112 else if (((iw0 & 0xF7E0) == 0xC600) && ((iw1 & 0x01C0) == 0x0000))
6113 decode_dsp32shift_0 (cpu, iw0, iw1);
6114 else if (((iw0 & 0xF7E0) == 0xC680) && ((iw1 & 0x0000) == 0x0000))
6115 decode_dsp32shiftimm_0 (cpu, iw0, iw1);
6116 else if ((iw0 & 0xFF00) == 0xF800)
6117 decode_psedoDEBUG_0 (cpu, iw0), insn_len = 2;
6118 else if ((iw0 & 0xFF00) == 0xF900)
6119 decode_psedoOChar_0 (cpu, iw0), insn_len = 2;
6120 else if (((iw0 & 0xFF00) == 0xF000) && ((iw1 & 0x0000) == 0x0000))
6121 decode_psedodbg_assert_0 (cpu, iw0, iw1, pc);
6122 else
6123 {
6124 TRACE_EXTRACT (cpu, "%s: no matching 32-bit pattern", __func__);
6125 illegal_instruction (cpu);
6126 }
6127
6128 return insn_len;
6129 }
6130
6131 bu32
interp_insn_bfin(SIM_CPU * cpu,bu32 pc)6132 interp_insn_bfin (SIM_CPU *cpu, bu32 pc)
6133 {
6134 int i;
6135 bu32 insn_len;
6136
6137 BFIN_CPU_STATE.n_stores = 0;
6138 DIS_ALGN_EXPT &= ~1;
6139 CYCLE_DELAY = 1;
6140 INSN_LEN = 0;
6141
6142 insn_len = _interp_insn_bfin (cpu, pc);
6143
6144 /* Proper display of multiple issue instructions. */
6145 if (insn_len == 8)
6146 {
6147 _interp_insn_bfin (cpu, pc + 4);
6148 _interp_insn_bfin (cpu, pc + 6);
6149 }
6150 for (i = 0; i < BFIN_CPU_STATE.n_stores; i++)
6151 {
6152 bu32 *addr = BFIN_CPU_STATE.stores[i].addr;
6153 *addr = BFIN_CPU_STATE.stores[i].val;
6154 TRACE_REGISTER (cpu, "dequeuing write %s = %#x",
6155 get_store_name (cpu, addr), *addr);
6156 }
6157
6158 cycles_inc (cpu, CYCLE_DELAY);
6159
6160 /* Set back to zero in case a pending CEC event occurs
6161 after this this insn. */
6162 INSN_LEN = 0;
6163
6164 return insn_len;
6165 }
6166