1 /* generate instructions for Z8KSIM
2
3 Copyright 1992, 1993, 2002 Free Software Foundation, Inc.
4
5 This file is part of Z8KSIM
6
7 Z8KSIM is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 Z8KSIM is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with Z8KZIM; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21 /* This program generates the code which emulates each of the z8k
22 instructions
23
24 code goes into three files, tc-gen1.h, tc-gen2.h and tc-gen3.h.
25 which file being made depends upon the options
26
27 -1 tc-gen1.h contains the fully expanded code for some selected
28 opcodes, (those in the quick.c list)
29
30 -2 tc-gen2.h contains a list of pointers to functions, one for each
31 opcode. It points to functions in tc-gen3.h and tc-gen1.h
32 depending upon quick.c
33
34 -3 tc-gen3.h contains all the opcodes in unexpanded form.
35
36 -b3 tc-genb3.h same as -3 but for long pointers
37
38 */
39
40 /* steve chamberlain
41 sac@cygnus.com */
42
43 #include "config.h"
44
45 #include <ansidecl.h>
46 #include <stdio.h>
47 #ifdef HAVE_STDLIB_H
48 #include <stdlib.h>
49 #endif
50 #ifdef HAVE_STRING_H
51 #include <string.h>
52 #else
53 #ifdef HAVE_STRINGS_H
54 #include <strings.h>
55 #endif
56 #endif
57
58 #define NICENAMES
59
60 #define DEFINE_TABLE
61 #include "../opcodes/z8k-opc.h"
62
63 #define NOPS 500
64
65 struct opcode_value
66 {
67 int n;
68 struct opcode_value *next;
69 };
70
71 #define NICENAMES
72 int BIG;
73
74 static char *reg_names[] =
75 {"bad", "src", "dst", "aux_a", "aux_b", "aux_r", "aux_x"};
76
77 #define IS_DST(x) ((x & 0xf) == 2)
78 #define IS_SRC(x) ((x & 0xf)==1)
79 #define SIZE_ADDRESS (BIG ? 8 : 4) /* number of nibbles in a ptr*/
80
81 static int file;
82
83 static int nibs = 0;
84
85 static char *current_size;
86 static char *current_name;
87 static char current_word0[40];
88 static char current_byte0[40];
89 static char current_byte1[40];
90 static int indent;
91 static char *p;
92 static char *d;
93
94 struct opcode_value *list[NOPS];
95
96 static opcode_entry_type *
lookup_inst(what)97 lookup_inst (what)
98 int what;
99 {
100 static short *z8k_inv_list = NULL;
101 const nr_z8k_inv_list_elements = 1 << 16;
102 if (z8k_inv_list == NULL)
103 {
104 /* Initialize the list to 0xff == -1 */
105 z8k_inv_list = calloc (nr_z8k_inv_list_elements, sizeof (short));
106 memset (z8k_inv_list, 0xff, nr_z8k_inv_list_elements * sizeof (short));
107 }
108 /* Entry empty? Fill it in. */
109 if (z8k_inv_list[what] == -1)
110 {
111
112 int nibl_index;
113 int nibl_matched;
114 unsigned short instr_nibl;
115 unsigned short tabl_datum, datum_class, datum_value;
116 char instr_nibbles[8];
117
118 opcode_entry_type *ptr = z8k_table;
119
120 nibl_matched = 0;
121
122 instr_nibbles[3] = (what >> 0) & 0xf;
123 instr_nibbles[2] = (what >> 4) & 0xf;
124 instr_nibbles[1] = (what >> 8) & 0xf;
125 instr_nibbles[0] = (what >> 12) & 0xf;
126
127 /* Assume it won't be found. */
128 z8k_inv_list[what] = -2;
129
130 while (ptr->name)
131 {
132 nibl_matched = 1;
133 for (nibl_index = 0; nibl_index < 4 && nibl_matched; nibl_index++)
134 {
135 instr_nibl = instr_nibbles[nibl_index];
136
137 tabl_datum = ptr->byte_info[nibl_index];
138 datum_class = tabl_datum & CLASS_MASK;
139 datum_value = ~CLASS_MASK & tabl_datum;
140
141 switch (datum_class)
142 {
143 case CLASS_BIT_1OR2:
144 if (datum_value != (instr_nibl & ~0x2))
145 nibl_matched = 0;
146 break;
147
148 case CLASS_IGNORE:
149 break;
150 case CLASS_BIT:
151 if (datum_value != instr_nibl)
152 nibl_matched = 0;
153 break;
154 case CLASS_00II:
155 if (!((~instr_nibl) & 0x4))
156 nibl_matched = 0;
157 break;
158 case CLASS_01II:
159 if (!(instr_nibl & 0x4))
160 nibl_matched = 0;
161 break;
162 case CLASS_0CCC:
163 if (!((~instr_nibl) & 0x8))
164 nibl_matched = 0;
165 break;
166 case CLASS_1CCC:
167 if (!(instr_nibl & 0x8))
168 nibl_matched = 0;
169 break;
170 case CLASS_0DISP7:
171 if (!((~instr_nibl) & 0x8))
172 nibl_matched = 0;
173 nibl_index += 1;
174 break;
175 case CLASS_1DISP7:
176 if (!(instr_nibl & 0x8))
177 nibl_matched = 0;
178 nibl_index += 1;
179 break;
180 case CLASS_REGN0:
181 if (instr_nibl == 0)
182 nibl_matched = 0;
183 break;
184 default:
185 break;
186 }
187 }
188 if (nibl_matched)
189 {
190 z8k_inv_list[what] = ptr->idx;
191 break; /* while */
192 }
193 ptr++;
194 }
195 }
196 if (z8k_inv_list[what] >= 0)
197 return z8k_table + z8k_inv_list[what];
198 return 0;
199 }
200
201 static char *
insn_4(n)202 insn_4 (n)
203 int n;
204 {
205 switch (n)
206 {
207 case 1:
208 return "((iwords_0>>8) & 0xf)";
209 case 2:
210 return "((ibytes_1 >> 4) & 0xf)";
211 case 3:
212 return "((ibytes_1) & 0xf)";
213 case 4:
214 return "((ibytes_2>>4) & 0xf)";
215 case 5:
216 return "((ibytes_2) & 0xf)";
217 case 6:
218 return "((ibytes_3 >> 4) & 0xf)";
219 case 7:
220 return "((ibytes_3) & 0xf)";
221 default:
222 return "****";
223 }
224 }
225
226 char *
ptr_mode()227 ptr_mode ()
228 {
229 if (BIG)
230 {
231 return "ptr_long";
232 }
233 return "word";
234 }
235
236 static
237 char *
ptr_size()238 ptr_size ()
239 {
240 if (BIG)
241 return "4";
242 return "2";
243 }
244
245 static char *
reg_n(x)246 reg_n (x)
247 unsigned int x;
248 {
249 return reg_names[x & 0xf];
250 }
251
252 char *
stack_ptr()253 stack_ptr ()
254 {
255 return BIG ? "14" : "15";
256 }
257
258 char *
mem()259 mem ()
260 {
261 #if 0
262 return BIG ? "segmem" : "unsegmem";
263 #else
264 return "mem";
265 #endif
266 }
267
268 int
match(a)269 match (a)
270 char *a;
271 {
272 if (strncmp (p, a, strlen (a)) == 0)
273 {
274 p += strlen (a);
275 return 1;
276 }
277 return 0;
278 }
279
280 static
281 void
sub(y)282 sub (y)
283 char *y;
284 {
285 sprintf (d, "%s", y);
286 d += strlen (d);
287 }
288
289 static char *
insn_16(n)290 insn_16 (n)
291 int n;
292 {
293 switch (n)
294 {
295 case 0:
296 return "(iwords_0)";
297 case 4:
298 return "(iwords_1)";
299 case 8:
300 return "(iwords_2)";
301 case 12:
302 return "(iwords_3)";
303 default:
304 return "****";
305 }
306 }
307
308 static
309 char *
insn_32(n)310 insn_32 (n)
311 int n;
312 {
313 switch (n)
314 {
315 case 0:
316 return "((iwords_0<<16) | (iwords_1))";
317 case 4:
318 return "((iwords_1<<16) | (iwords_2))";
319 case 8:
320 return "((iwords_2<<16) | (iwords_3))";
321 default:
322 return "****";
323 }
324 }
325
326 static char *
size_name(x)327 size_name (x)
328 int x;
329 {
330 switch (x)
331 {
332 case 8:
333 return "byte";
334 case 16:
335 return "word";
336 case 32:
337 return "long";
338 case 64:
339 return "quad";
340 }
341 return "!!";
342 }
343
344 /*VARARGS*/
345 void
emit(string,a1,a2,a3,a4,a5)346 emit (string, a1, a2, a3, a4, a5)
347 char *string;
348 char* a1;
349 char* a2;
350 char* a3;
351 char* a4;
352 char* a5;
353 {
354 int indent_inc = 0;
355 int indent_dec = 0;
356 int i;
357 char buffer[1000];
358
359 d = buffer;
360 p = string;
361
362 while (*p)
363 {
364 if (match ("<fop>"))
365 {
366 if (BIG)
367 {
368 sub ("bfop");
369 }
370 else
371 {
372 sub ("sfop");
373 }
374 }
375 else if (match ("<iptr>"))
376 {
377 if (BIG)
378 {
379 switch (nibs)
380 {
381 case 4:
382 sub ("(((iwords_1 << 8) | (iwords_2)) & 0x7fffff)");
383 break;
384 default:
385 sub ("fail(context,124)");
386 break;
387 }
388 }
389 else
390 {
391 switch (nibs)
392 {
393 case 4:
394 sub ("iwords_1");
395 break;
396 default:
397 sub ("fail(context,123)");
398 break;
399 }
400 }
401 }
402 else if (match ("<name>"))
403 {
404 sub (current_name);
405 }
406 else if (match ("<size>"))
407 {
408 sub (current_size);
409 }
410 else if (match ("<insn_4>"))
411 {
412 sub (insn_4 (nibs));
413 }
414 else if (match ("<insn_16>"))
415 {
416 sub (insn_16 (nibs));
417 }
418 else if (match ("<insn_32>"))
419 {
420 sub (insn_32 (nibs));
421 }
422 else if (match ("iwords_0"))
423 {
424 sub (current_word0);
425 }
426 else if (match ("ibytes_0"))
427 {
428 sub (current_byte0);
429 }
430 else if (match ("<ibytes_1>"))
431 {
432 sub (current_byte1);
433 }
434 else if (match ("<next_size>"))
435 {
436 if (strcmp (current_size, "word") == 0)
437 sub ("long");
438 if (strcmp (current_size, "byte") == 0)
439 sub ("word");
440 else if (strcmp (current_size, "long") == 0)
441 sub ("quad");
442 else
443 abort ();
444 }
445 else if (match ("<addr_type>"))
446 {
447 if (BIG)
448 sub ("unsigned long");
449 else
450 sub ("unsigned short");
451 }
452
453 else if (match ("<c_size>"))
454 {
455 if (strcmp (current_size, "word") == 0)
456 sub ("short");
457 else if (strcmp (current_size, "byte") == 0)
458 sub ("char");
459 else if (strcmp (current_size, "long") == 0)
460 sub ("long");
461 else
462 abort ();
463 }
464
465 else if (match ("<pc>"))
466 {
467 sub ("pc");
468 }
469 else if (match ("<mem>"))
470 {
471 sub (mem ());
472 }
473 else if (match ("<sp>"))
474 {
475 sub (stack_ptr ());
476 }
477 else if (match ("<ptr_size>"))
478 {
479 sub (ptr_size ());
480 }
481 else if (match ("<ptr_mode>"))
482 {
483 sub (ptr_mode ());
484 }
485 else if (match ("<insn_8>"))
486 {
487 switch (nibs)
488 {
489 case 2:
490 sub ("(iwords_0&0xff)");
491 break;
492 case 4:
493 sub ("(iwords_1>>8)");
494 break;
495 case 6:
496 sub ("(iwords_1&0xff)");
497 break;
498 case 8:
499 sub ("(iwords_2>>8)");
500 break;
501 case 12:
502 sub ("(/* WHO */iwords_3&0xff)");
503 break;
504 default:
505 abort ();
506 }
507 }
508 else
509 {
510 if (*p == '{')
511 indent_inc++;
512 if (*p == '}')
513 indent_dec++;
514 *d++ = *p;
515 p++;
516 }
517 }
518 *d++ = 0;
519 indent -= indent_dec;
520 for (i = 0; i < indent; i++)
521 printf ("\t");
522 indent += indent_inc;
523 printf (buffer, a1, a2, a3, a4, a5);
524
525 }
526
527 /* fetch the lvalues of the operands */
528 void
info_args(p)529 info_args (p)
530 opcode_entry_type *p;
531 {
532 unsigned int *s;
533
534 int done_one_imm8 = 0;
535
536 /* int done_read = 4;*/
537 s = p->byte_info;
538 nibs = 0;
539 while (*s)
540 {
541 switch (*s & CLASS_MASK)
542 {
543 case CLASS_BIT_1OR2:
544 emit ("register unsigned int imm_src=(<insn_4>& 2)?2:1;\n");
545 break;
546 case CLASS_IGNORE:
547 case CLASS_BIT:
548 /* Just ignore these, we've already decoded this bit */
549 nibs++;
550 break;
551 case CLASS_REGN0:
552 case CLASS_REG:
553 /* this nibble tells us which register to use as an arg,
554 if we've already gobbled the nibble we know what to use */
555 {
556 int regname = *s & 0xf;
557
558 emit ("register unsigned int reg_%s=<insn_4>;\n",
559 reg_names[regname]);
560
561 nibs++;
562 }
563 break;
564 case CLASS_ADDRESS:
565 emit ("register unsigned base_%s=<iptr>;\n", reg_n (*s));
566
567 nibs += SIZE_ADDRESS;
568
569 break;
570 case CLASS_01II:
571 case CLASS_00II:
572 emit ("register unsigned int imm_src=<insn_4>&0x2;\n");
573 nibs++;
574 break;
575 case CLASS_FLAGS:
576 emit ("register unsigned int imm_src=<insn_4>;\n");
577 nibs++;
578 break;
579 case CLASS_IMM:
580 /* Work out the size of the think to fetch */
581
582 {
583 switch (*s & ~CLASS_MASK)
584 {
585 case ARG_IMM16:
586 emit ("register unsigned imm_src=<insn_16>;\n");
587 nibs += 4;
588 break;
589 case ARG_IMM32:
590 emit ("register unsigned int imm_src= %s;\n", insn_32 (nibs));
591 nibs += 8;
592 break;
593 case ARG_IMM4:
594 emit ("register unsigned int imm_src=<insn_4>;\n");
595 nibs++;
596 break;
597 case ARG_NIM4:
598 emit ("register unsigned int imm_src = - <insn_4>;\n");
599 nibs++;
600 break;
601 case ARG_IMM2:
602 emit ("register unsigned int imm_src=<insn_4> & 0x2;\n");
603 nibs++;
604 break;
605
606 case ARG_IMM4M1:
607 emit ("register unsigned int imm_src=(<insn_4> + 1);\n");
608 nibs++;
609 break;
610 case ARG_IMM_1:
611 emit ("register unsigned int imm_src=1;\n");
612 break;
613 case ARG_IMM_2:
614 emit ("register unsigned int imm_src=2;\n");
615 break;
616 case ARG_NIM8:
617 emit ("register unsigned int imm_src=-<insn_8>;\n");
618 nibs += 2;
619 break;
620 case ARG_IMM8:
621 if (!done_one_imm8)
622 {
623 emit ("register unsigned int imm_src=<insn_8>;\n");
624 nibs += 2;
625 done_one_imm8 = 1;
626 }
627 break;
628 default:
629 emit ("register int fail%d=fail(context,1);\n", nibs);
630 break;
631 }
632 break;
633
634 case CLASS_DISP8:
635 /* We can't use `(char)' since char might be unsigned.
636 We can't use `(signed char)' because the compiler might be K&R.
637 This seems safe, since it only assumes that bytes are 8
638 bits. */
639 emit ("register unsigned int oplval_dst=((ibytes_1 << (sizeof (int) * 8 - 8)) >> (sizeof (int) * 8 - 9)) + pc;\n");
640 #if 0
641 /* Original code: fails if characters are unsigned. */
642 emit ("register unsigned int oplval_dst=(((char)ibytes_1)<<1) + pc;\n");
643 #endif
644 nibs += 2;
645 break;
646 case CLASS_CC:
647 emit ("register unsigned int op_cc=<insn_4>;\n");
648 nibs++;
649 break;
650 default:
651 emit ("register int FAIL%d=fail(context,2);\n", nibs);
652 break;
653 }
654 ;
655 /* work out how to fetch the immediate value */
656 }
657
658 s++;
659 }
660 }
661
662 void
info_special(p,getdst,nostore,before,nosrc)663 info_special (p, getdst, nostore, before, nosrc)
664 opcode_entry_type *p;
665 int *getdst;
666 int *nostore;
667 int *before;
668 int *nosrc;
669 {
670 switch (p->opcode)
671 {
672 case OPC_exts:
673 case OPC_extsb:
674 case OPC_extsl:
675 *nostore = 1;
676 *nosrc = 1;
677 break;
678 case OPC_ldm:
679 *nostore = 1;
680 *nosrc = 1;
681 break;
682 case OPC_negb:
683 case OPC_neg:
684 case OPC_sla:
685 case OPC_slab:
686 case OPC_slal:
687 case OPC_sda:
688 case OPC_sdab:
689 case OPC_sdal:
690 case OPC_com:
691 case OPC_comb:
692 case OPC_adc:
693 case OPC_sbc:
694 case OPC_nop:
695 case OPC_adcb:
696 case OPC_add:
697 case OPC_addb:
698 case OPC_addl:
699 case OPC_inc:
700 case OPC_sub:
701 case OPC_subb:
702 case OPC_subl:
703 case OPC_and:
704 case OPC_andb:
705 case OPC_xorb:
706 case OPC_xor:
707 break;
708
709 case OPC_mult:
710 case OPC_multl:
711 case OPC_div:
712 case OPC_divl:
713
714 *nostore = 1;
715 break;
716
717 case OPC_testb:
718 case OPC_test:
719 case OPC_testl:
720 case OPC_cp:
721 case OPC_cpb:
722 case OPC_cpl:
723 case OPC_bit:
724 *nostore = 1;
725 *before = 0;
726 break;
727
728 case OPC_bpt:
729 case OPC_jr:
730 case OPC_jp:
731 case OPC_ret:
732 case OPC_call:
733 case OPC_tcc:
734 *nosrc = 1;
735 *nostore = 1;
736 *before = 1;
737 break;
738 case OPC_sc:
739 *nostore = 1;
740 *before = 0;
741 break;
742 case OPC_clrb:
743 case OPC_clr:
744 *before = 1;
745 *nosrc = 1;
746 break;
747 case OPC_ldi:
748 case OPC_ldib:
749 case OPC_lddb:
750 case OPC_ldd:
751
752 *before = 1;
753 *nostore = 1;
754 *nosrc = 1;
755 break;
756 case OPC_ldk:
757 case OPC_ld:
758 case OPC_ldb:
759 case OPC_ldl:
760 *before = 1;
761 *getdst = 0;
762 break;
763 case OPC_push:
764 case OPC_pushl:
765 case OPC_pop:
766 case OPC_popl:
767 *before = 1;
768 *getdst = 0;
769 break;
770 case OPC_lda:
771 *nosrc = 1;
772 break;
773 }
774 }
775
776 /* calculate the lvalues required for the opcode */
777 void
info_lvals(p)778 info_lvals (p)
779 opcode_entry_type *p;
780 {
781 /* emit code to work out lvalues, if any */
782 unsigned int *i = p->arg_info;
783
784 while (*i)
785 {
786 current_name = reg_n (*i);
787 current_size = size_name (p->type);
788 switch (*i & CLASS_MASK)
789 {
790 case CLASS_X:
791 /* address(reg) */
792 emit ("register <addr_type> oplval_<name>= ((base_<name> + (short)get_word_reg(context,reg_<name>)) & 0xffff) + (base_<name> & ~0xffff);\n");
793 break;
794 case CLASS_IR:
795 /* Indirect register */
796 emit ("register int oplval_<name> = get_<ptr_mode>_reg(context,reg_<name>);\n");
797 break;
798 case CLASS_DA:
799 emit ("register int oplval_<name>=base_<name>;\n");
800 break;
801 case CLASS_IMM:
802 case CLASS_REG_WORD:
803 case CLASS_REG_LONG:
804 case CLASS_REG_BYTE:
805 case CLASS_PR:
806 break;
807 case CLASS_BA:
808 emit ("register int oplval_<name> = get_<ptr_mode>_reg(context,reg_<name>) + (short)(imm_src);\n");
809 break;
810 case CLASS_BX:
811 emit ("register int oplval_<name> = get_<ptr_mode>_reg(context,reg_<name>)\n");
812 emit (" + get_word_reg(context,reg_aux_x);\n");
813 break;
814 }
815 i++;
816 }
817 }
818
819 /* emit code to fetch the args from calculated lvalues */
820 int allregs;
821 void
info_fetch(p,getdst)822 info_fetch (p, getdst)
823 opcode_entry_type *p;
824 int getdst;
825 {
826 unsigned int *i = p->arg_info;
827 int had_src = 0;
828
829 allregs = 1;
830 while (*i)
831 {
832
833 current_name = reg_n (*i);
834 current_size = size_name (p->type);
835 switch (*i & CLASS_MASK)
836 {
837 case CLASS_X:
838 case CLASS_IR:
839 case CLASS_BA:
840 case CLASS_BX:
841 case CLASS_DA:
842 if (!getdst && IS_DST (*i))
843 break;
844 emit ("register int op_<name>= get_<size>_<mem>_da(context,oplval_<name>);\n");
845 allregs = 0;
846 break;
847 case CLASS_IMM:
848 if (!had_src)
849 {
850 if (p->opcode == OPC_out ||
851 p->opcode == OPC_outb ||
852 p->opcode == OPC_sout ||
853 p->opcode == OPC_soutb)
854 {
855 /* The imm is a dest here */
856 emit ("register int op_dst = imm_src;\n");
857 }
858 else
859 {
860 emit ("register int op_src = imm_src;\n");
861 }
862 }
863 break;
864 case CLASS_REG_QUAD:
865 if (!getdst && IS_DST (*i))
866 break;
867 had_src |= IS_SRC (*i);
868 emit ("UDItype op_<name> ;\n");
869
870 break;
871 case CLASS_REG_WORD:
872 if (!getdst && IS_DST (*i))
873 break;
874 had_src |= IS_SRC (*i);
875 emit ("register int op_<name> = get_word_reg(context,reg_<name>);\n");
876 break;
877
878 case CLASS_REG_LONG:
879 if (!getdst && IS_DST (*i))
880 break;
881 had_src |= IS_SRC (*i);
882 emit ("register int op_<name> = get_long_reg(context,reg_<name>);\n");
883 break;
884 case CLASS_REG_BYTE:
885 if (!getdst && IS_DST (*i))
886 break;
887 had_src |= IS_SRC (*i);
888 emit ("register int op_<name> = get_byte_reg(context,reg_<name>);\n");
889 break;
890 }
891 i++;
892 }
893 }
894
895 static void
normal_flags(p,s,neg)896 normal_flags (p, s, neg)
897 opcode_entry_type *p;
898 char *s;
899 {
900 emit (" %s;\n", s);
901 emit ("NORMAL_FLAGS(context,%d, tmp, op_dst, op_src,%d); \n", p->type,neg);
902 }
903
904 static void
test_normal_flags(p,s,opt)905 test_normal_flags (p, s, opt)
906 opcode_entry_type *p;
907 char *s;
908 int opt;
909 {
910 emit (" %s;\n", s);
911 if (0 && opt)
912 {
913 emit ("context->broken_flags = TST_FLAGS;\n");
914 emit ("context->size = %d;\n", p->type);
915 }
916 else
917 {
918 emit ("TEST_NORMAL_FLAGS(context,%d, tmp); \n", p->type);
919 }
920
921 }
922
923 static void
optimize_normal_flags(p,s,neg)924 optimize_normal_flags (p, s,neg)
925 opcode_entry_type *p;
926 char *s;
927 {
928 emit (" %s;\n", s);
929 #if 0
930 emit ("context->broken_flags = CMP_FLAGS;\n");
931 #else
932 emit ("NORMAL_FLAGS(context,%d, tmp, op_dst, op_src,%d); \n", p->type, neg);
933 #endif
934 }
935
936 static
937 void
jp(p)938 jp (p)
939 opcode_entry_type *p;
940 {
941
942 emit ("if(op_cc == 8 || COND(context,op_cc)) pc = oplval_dst;\n");
943 }
944
945 static void
jr(p)946 jr (p)
947 opcode_entry_type *p;
948 {
949 emit ("if(op_cc == 8 || COND(context,op_cc)) pc = oplval_dst;\n");
950 }
951
952 static void
ret(p)953 ret (p)
954 opcode_entry_type *p;
955 {
956 emit ("if(op_cc == 8 || COND(context,op_cc))\n{\n");
957 emit ("pc = get_<ptr_mode>_<mem>_ir(context,<sp>);\n");
958 emit ("put_<ptr_mode>_reg(context,<sp>, get_<ptr_mode>_reg(context,<sp>) + <ptr_size>);\n");
959 emit ("};\n");
960 }
961
962 static void
call(p)963 call (p)
964 opcode_entry_type *p;
965 {
966 emit ("put_<ptr_mode>_reg(context,<sp>,tmp = get_<ptr_mode>_reg(context,<sp>) - <ptr_size>);\n");
967 emit ("put_<ptr_mode>_<mem>_da(context,tmp, pc);\n");
968 emit ("pc = oplval_dst;\n");
969 }
970
971 static void
push(p)972 push (p)
973 opcode_entry_type *p;
974 {
975 emit ("tmp = op_src;\n");
976 emit ("oplval_dst -= %d;\n", p->type / 8);
977 emit ("put_<ptr_mode>_reg(context,reg_dst, oplval_dst);\n");
978 }
979
980 static void
pop(p)981 pop (p)
982 opcode_entry_type *p;
983 {
984 emit ("tmp = op_src;\n");
985 emit ("put_<ptr_mode>_reg(context,reg_src, oplval_src + %d);\n", p->type / 8);
986 }
987
988 static void
ld(p)989 ld (p)
990 opcode_entry_type *p;
991 {
992 emit ("tmp = op_src;\n");
993 }
994
995 static void
sc()996 sc ()
997 {
998 emit ("support_call(context,imm_src);\n");
999 }
1000
1001 static void
bpt()1002 bpt ()
1003 {
1004 emit ("pc -=2; \n");
1005 emit ("context->exception = SIM_BREAKPOINT;\n");
1006 }
1007
1008 static void
ldi(p,size,inc)1009 ldi (p, size, inc)
1010 opcode_entry_type *p;
1011 int size;
1012 int inc;
1013 {
1014 int dinc = (size / 8) * inc;
1015
1016 current_size = size_name (size);
1017 emit ("{ \n");
1018 emit ("int type = %s;\n", insn_4 (7));
1019 emit ("int rs = get_<ptr_mode>_reg(context,reg_src);\n");
1020 emit ("int rd = get_<ptr_mode>_reg(context,reg_dst);\n");
1021 emit ("int rr = get_word_reg(context,reg_aux_r);\n");
1022 emit ("do {\n");
1023 emit ("put_<size>_<mem>_da(context,rd, get_<size>_<mem>_da(context,rs));\n");
1024 emit ("rd += %d;\n", dinc);
1025 emit ("rs += %d;\n", dinc);
1026 emit ("rr --;\n");
1027 emit ("context->cycles += 9;\n");
1028 emit ("} while (!type && rr != 0 && context->exception <= 1);\n");
1029 emit ("if (context->exception>1) pc -=4;\n");
1030 emit ("put_<ptr_mode>_reg(context,reg_src, rs);\n");
1031 emit ("put_<ptr_mode>_reg(context,reg_dst, rd);\n");
1032 emit ("put_word_reg(context,reg_aux_r, rr);\n");
1033 emit ("}\n");
1034
1035 }
1036
1037 static void
shift(p,arith)1038 shift (p, arith)
1039 opcode_entry_type *p;
1040 int arith;
1041 {
1042
1043 /* We can't use `(char)' since char might be unsigned.
1044 We can't use `(signed char)' because the compiler might be K&R.
1045 This seems safe, since it only assumes that bytes are 8 bits. */
1046 emit ("op_src = (op_src << (sizeof (int) * 8 - 8)) >> (sizeof (int) * 8 - 8);\n");
1047 #if 0
1048 /* Original code: fails if characters are unsigned. */
1049 emit ("op_src = (char)op_src;\n");
1050 #endif
1051 emit ("if (op_src < 0) \n");
1052 emit ("{\n");
1053 emit ("op_src = -op_src;\n");
1054 emit ("op_dst = (%s <c_size>)op_dst;\n", arith ? "" : "unsigned");
1055 emit ("tmp = (%s op_dst) >> op_src;\n", arith ? "" : "(unsigned)");
1056 emit ("context->carry = op_dst >> (op_src-1);\n", p->type);
1057 emit ("}\n");
1058 emit ("else\n");
1059 emit ("{\n");
1060 emit ("tmp = op_dst << op_src;\n");
1061 emit ("context->carry = op_dst >> (%d - op_src);\n", p->type);
1062 emit ("}\n");
1063 emit ("context->zero = (<c_size>)tmp == 0;\n");
1064 emit ("context->sign = (int)((<c_size>)tmp) < 0;\n");
1065 emit ("context->overflow = ((int)tmp < 0) != ((int)op_dst < 0);\n");
1066 emit ("context->cycles += 3*op_src;\n");
1067 emit ("context->broken_flags = 0;\n");
1068
1069 }
1070
1071 static void
rotate(p,through_carry,size,left)1072 rotate (p, through_carry, size, left)
1073 opcode_entry_type *p;
1074 int through_carry;
1075 int size;
1076 int left;
1077 {
1078
1079 if (!left)
1080 {
1081 emit ("while (op_src--) {\n");
1082 emit ("int rotbit;\n");
1083 emit ("rotbit = op_dst & 1;\n");
1084 emit ("op_dst = ((unsigned)op_dst) >> 1;\n");
1085
1086 if (through_carry)
1087 {
1088 emit ("op_dst |= context->carry << %d;\n", size - 1);
1089 }
1090 else
1091 {
1092 emit ("op_dst |= rotbit << %d;\n", size - 1);
1093 }
1094 emit ("context->carry = rotbit;\n");
1095 emit ("}\n");
1096 }
1097 else
1098 {
1099 emit ("while (op_src--) {\n");
1100 emit ("int rotbit;\n");
1101
1102 emit ("rotbit = (op_dst >> (%d))&1;\n", size - 1);
1103 emit ("op_dst <<=1;\n");
1104 if (through_carry)
1105 {
1106 emit ("if (context->carry) op_dst |=1;\n");
1107 }
1108 else
1109 {
1110 emit ("if (rotbit) op_dst |= 1;\n");
1111 }
1112 emit ("context->carry = rotbit;\n");
1113 emit ("}\n");
1114 }
1115 emit ("tmp = (<c_size>)op_dst;\n");
1116 emit ("context->zero = tmp == 0;\n");
1117 emit ("context->sign = (int)tmp < 0;\n");
1118 emit ("context->overflow = ((int)tmp < 0) != ((int)op_dst < 0);\n");
1119 emit ("context->cycles += 3*op_src;\n");
1120 emit ("context->broken_flags = 0;\n");
1121
1122 }
1123
1124 static void
adiv(p)1125 adiv (p)
1126 opcode_entry_type *p;
1127 {
1128 emit ("if (op_src==0)\n");
1129 emit ("{\n");
1130 emit ("context->exception = SIM_DIV_ZERO;\n");
1131 emit ("}\n");
1132 emit ("else\n");
1133 emit ("{\n");
1134
1135 if (p->type == 32)
1136 {
1137 emit ("op_dst.low = (int)get_long_reg(context,reg_dst+2);\n");
1138 emit ("op_dst.high = (int)get_long_reg(context,reg_dst+0);\n");
1139 #ifdef __GNUC__
1140 emit ("tmp = (((long long)op_dst.high << 32) + (op_dst.low)) / (int)op_src;\n");
1141 #else
1142 emit ("tmp = (long)op_dst.low / (int)op_src;\n");
1143 #endif
1144 emit ("put_long_reg(context,reg_dst+2, tmp);\n");
1145 #ifdef __GNUC__
1146 emit ("put_long_reg(context,reg_dst, (((long long)op_dst.high << 32) + (op_dst.low)) %% (int)op_src);\n");
1147 #else
1148 emit ("put_long_reg(context,reg_dst, (int)op_dst.low %% (int)op_src);\n");
1149 #endif
1150
1151 emit ("context->zero = op_src == 0 || (op_dst.low==0 && op_dst.high==0);\n");
1152 }
1153 else
1154 {
1155 emit ("tmp = (long)op_dst / (short)op_src;\n");
1156 emit ("put_word_reg(context,reg_dst+1, tmp);\n");
1157 emit ("put_word_reg(context,reg_dst, (long) op_dst %% (short)op_src);\n");
1158 emit ("context->zero = op_src == 0 || op_dst==0;\n");
1159 }
1160
1161 emit ("context->sign = (int)tmp < 0;\n");
1162 emit ("context->overflow =(tmp & 0x%x) != 0;\n",
1163 ~((1 << (p->type)) - 1));
1164 emit ("context->carry = (tmp & 0x%x) != 0;\n",
1165 ~(1 << (p->type)));
1166
1167 emit ("}\n");
1168 }
1169
1170 static void
dobit(p)1171 dobit (p)
1172 opcode_entry_type *p;
1173 {
1174 emit("context->zero = (op_dst & (1<<op_src))==0;\n");
1175 emit("context->broken_flags = 0;\n");
1176 }
1177 static void
doset(p,v)1178 doset (p, v)
1179 opcode_entry_type*p;
1180 int v;
1181 {
1182 if (v)
1183 emit (" tmp = op_dst | (1<< op_src);\n");
1184 else
1185 emit (" tmp = op_dst & ~(1<< op_src);\n");
1186 }
1187
1188 static void
mult(p)1189 mult (p)
1190 opcode_entry_type *p;
1191 {
1192
1193 if (p->type == 32)
1194 {
1195 emit ("op_dst.low = get_long_reg(context,reg_dst+2);\n");
1196 emit ("tmp = op_dst.low * op_src;\n");
1197 emit ("put_long_reg(context,reg_dst+2, tmp);\n");
1198 emit ("put_long_reg(context,reg_dst, 0);\n");
1199 }
1200 else
1201 {
1202 emit ("op_dst = get_word_reg(context,reg_dst+1);\n");
1203 emit ("tmp = op_dst * op_src;\n");
1204 emit ("put_long_reg(context,reg_dst, tmp);\n");
1205 }
1206
1207 emit ("context->sign = (int)tmp < 0;\n");
1208 emit ("context->overflow =0;\n");
1209 emit ("context->carry = (tmp & 0x%x) != 0;\n", ~((1 << (p->type)) - 1));
1210 emit ("context->zero = tmp == 0;\n");
1211
1212 }
1213
1214 static void
exts(p)1215 exts (p)
1216 opcode_entry_type *p;
1217 {
1218 /* Fetch the ls part of the src */
1219 current_size = size_name (p->type * 2);
1220
1221 if (p->type == 32)
1222 {
1223 emit ("tmp= get_long_reg(context,reg_dst+2);\n");
1224 emit ("if (tmp & (1<<%d)) {\n", p->type - 1);
1225 emit ("put_long_reg(context,reg_dst, 0xffffffff);\n");
1226 emit ("}\n");
1227 emit ("else\n");
1228 emit ("{\n");
1229 emit ("put_long_reg(context,reg_dst, 0);\n");
1230 emit ("}\n");
1231 }
1232 else
1233 {
1234 emit ("tmp= get_<size>_reg(context,reg_dst);\n");
1235 emit ("if (tmp & (1<<%d)) {\n", p->type - 1);
1236 emit ("tmp |= 0x%x;\n", ~((1 << p->type) - 1));
1237 emit ("}\n");
1238 emit ("else\n");
1239 emit ("{\n");
1240
1241 emit ("tmp &= 0x%x;\n", ((1 << p->type) - 1));
1242 emit ("}\n");
1243 emit ("put_<size>_reg(context,reg_dst, tmp);\n");
1244 }
1245 }
doflag(on)1246 doflag(on)
1247 int on;
1248 {
1249 /* Load up the flags */
1250 emit(" COND (context, 0x0b);\n");
1251
1252 if (on)
1253 emit ("{ int on =1;\n ");
1254 else
1255 emit ("{ int on =0;\n ");
1256
1257 emit ("if (imm_src & 1)\n");
1258 emit ("PSW_OVERFLOW = on;\n");
1259
1260 emit ("if (imm_src & 2)\n");
1261 emit ("PSW_SIGN = on;\n");
1262
1263 emit ("if (imm_src & 4)\n");
1264 emit ("PSW_ZERO = on;\n");
1265
1266 emit ("if (imm_src & 8)\n");
1267 emit ("PSW_CARRY = on;\n");
1268 emit("}\n");
1269
1270
1271 }
1272 /* emit code to perform operation */
1273 void
info_docode(p)1274 info_docode (p)
1275 opcode_entry_type *p;
1276 {
1277 switch (p->opcode)
1278 {
1279 case OPC_clr:
1280 case OPC_clrb:
1281 emit ("tmp = 0;\n");
1282 break;
1283 case OPC_ex:
1284 case OPC_exb:
1285
1286 emit ("tmp = op_src; \n");
1287 if (allregs)
1288 {
1289 emit ("put_<size>_reg(context,reg_src, op_dst);\n");
1290 }
1291 else
1292 {
1293 emit ("put_<size>_mem_da(context, oplval_src, op_dst);\n");
1294 }
1295 break;
1296 case OPC_adc:
1297 case OPC_adcb:
1298 normal_flags (p, "op_src += COND(context,7);tmp = op_dst + op_src ;",0);
1299 break;
1300 case OPC_sbc:
1301 normal_flags (p, "op_src += COND(context,7);tmp = op_dst - op_src ;",1);
1302 break;
1303 case OPC_nop:
1304 break;
1305 case OPC_com:
1306 case OPC_comb:
1307 test_normal_flags (p, "tmp = ~ op_dst", 1);
1308 break;
1309 case OPC_and:
1310 case OPC_andb:
1311 test_normal_flags (p, "tmp = op_dst & op_src", 1);
1312 break;
1313 case OPC_xor:
1314 case OPC_xorb:
1315 test_normal_flags (p, "tmp = op_dst ^ op_src", 1);
1316 break;
1317 case OPC_or:
1318 case OPC_orb:
1319 test_normal_flags (p, "tmp = op_dst | op_src", 1);
1320 break;
1321 case OPC_sla:
1322 case OPC_slab:
1323 case OPC_slal:
1324 case OPC_sda:
1325 case OPC_sdab:
1326 case OPC_sdal:
1327 shift (p, 1);
1328 break;
1329
1330 case OPC_sll:
1331 case OPC_sllb:
1332 case OPC_slll:
1333 case OPC_sdl:
1334 case OPC_sdlb:
1335 case OPC_sdll:
1336 shift (p, 0);
1337 break;
1338 case OPC_rl:
1339 rotate (p, 0, 16, 1);
1340 break;
1341 case OPC_rlb:
1342 rotate (p, 0, 8, 1);
1343 break;
1344 case OPC_rr:
1345 rotate (p, 0, 16, 0);
1346 break;
1347 case OPC_rrb:
1348 rotate (p, 0, 8, 0);
1349 break;
1350 case OPC_rrc:
1351 rotate (p, 1, 16, 0);
1352 break;
1353 case OPC_rrcb:
1354 rotate (p, 1, 8, 0);
1355 break;
1356 case OPC_rlc:
1357 rotate (p, 1, 16, 1);
1358 break;
1359 case OPC_rlcb:
1360 rotate (p, 1, 8, 1);
1361 break;
1362
1363 case OPC_extsb:
1364 case OPC_exts:
1365 case OPC_extsl:
1366 exts (p);
1367 break;
1368 case OPC_add:
1369 case OPC_addb:
1370 case OPC_addl:
1371 case OPC_inc:
1372 case OPC_incb:
1373 optimize_normal_flags (p, "tmp = op_dst + op_src",0);
1374 break;
1375 case OPC_testb:
1376 case OPC_test:
1377 case OPC_testl:
1378 test_normal_flags (p, "tmp = op_dst", 0);
1379 break;
1380 case OPC_cp:
1381 case OPC_cpb:
1382 case OPC_cpl:
1383 normal_flags (p, "tmp = op_dst - op_src",1);
1384 break;
1385 case OPC_negb:
1386 case OPC_neg:
1387 emit ("{\n");
1388 emit ("int op_src = -op_dst;\n");
1389 emit ("op_dst = 0;\n");
1390 optimize_normal_flags (p, "tmp = op_dst + op_src;\n",1);
1391 emit ("}");
1392 break;
1393
1394 case OPC_sub:
1395 case OPC_subb:
1396 case OPC_subl:
1397 case OPC_dec:
1398 case OPC_decb:
1399 optimize_normal_flags (p, "tmp = op_dst - op_src",1);
1400 break;
1401 case OPC_bpt:
1402 bpt ();
1403 break;
1404 case OPC_jr:
1405 jr (p);
1406 break;
1407 case OPC_sc:
1408 sc ();
1409 break;
1410 case OPC_jp:
1411 jp (p);
1412 break;
1413 case OPC_ret:
1414 ret (p);
1415 break;
1416 case OPC_call:
1417 call (p);
1418 break;
1419 case OPC_tcc:
1420 case OPC_tccb:
1421 emit ("if(op_cc == 8 || COND(context,op_cc)) put_word_reg(context,reg_dst, 1);\n");
1422 break;
1423 case OPC_lda:
1424 emit ("tmp = oplval_src; \n");
1425 /*(((oplval_src) & 0xff0000) << 8) | (oplval_src & 0xffff); \n");*/
1426 break;
1427 case OPC_ldk:
1428 case OPC_ld:
1429
1430 case OPC_ldb:
1431 case OPC_ldl:
1432 ld (p);
1433 break;
1434 case OPC_ldib:
1435 ldi (p, 8, 1);
1436 break;
1437 case OPC_ldi:
1438 ldi (p, 16, 1);
1439 break;
1440
1441 case OPC_lddb:
1442 ldi (p, 8, -1);
1443 break;
1444 case OPC_ldd:
1445 ldi (p, 16, -1);
1446 break;
1447
1448 case OPC_push:
1449 case OPC_pushl:
1450 push (p);
1451 break;
1452
1453 case OPC_div:
1454 case OPC_divl:
1455 adiv (p);
1456 break;
1457 case OPC_mult:
1458 case OPC_multl:
1459 mult (p);
1460 break;
1461 case OPC_pop:
1462 case OPC_popl:
1463 pop (p);
1464 break;
1465 case OPC_set:
1466 doset (p,1);
1467 break;
1468 case OPC_res:
1469 doset (p,0);
1470 break;
1471 case OPC_bit:
1472 dobit(p);
1473 break;
1474 case OPC_resflg:
1475 doflag(0);
1476 break;
1477 case OPC_setflg:
1478 doflag(1);
1479 break;
1480 default:
1481
1482 emit ("tmp = fail(context,%d);\n", p->opcode);
1483 break;
1484 }
1485 }
1486
1487 /* emit code to store result in calculated lvalue */
1488
1489 void
info_store(p)1490 info_store (p)
1491 opcode_entry_type *p;
1492 {
1493 unsigned int *i = p->arg_info;
1494
1495 while (*i)
1496 {
1497 current_name = reg_n (*i);
1498 current_size = size_name (p->type);
1499
1500 if (IS_DST (*i))
1501 {
1502 switch (*i & CLASS_MASK)
1503 {
1504 case CLASS_PR:
1505 emit ("put_<ptr_mode>_reg(context,reg_<name>, tmp);\n");
1506 break;
1507 case CLASS_REG_LONG:
1508 case CLASS_REG_WORD:
1509 case CLASS_REG_BYTE:
1510
1511 emit ("put_<size>_reg(context,reg_<name>,tmp);\n");
1512 break;
1513 case CLASS_X:
1514 case CLASS_IR:
1515 case CLASS_DA:
1516 case CLASS_BX:
1517 case CLASS_BA:
1518
1519 emit ("put_<size>_<mem>_da(context,oplval_<name>, tmp);\n");
1520 break;
1521 case CLASS_IMM:
1522 break;
1523 default:
1524 emit ("abort(); ");
1525 break;
1526 }
1527
1528 }
1529 i++;
1530 }
1531 }
1532
1533 static
1534 void
mangle(p,shortcut,value)1535 mangle (p, shortcut, value)
1536 opcode_entry_type *p;
1537 int shortcut;
1538 int value;
1539 {
1540 int nostore = 0;
1541 int extra;
1542 int getdst = 1;
1543 int before = 0;
1544 int nosrc = 0;
1545
1546 emit ("/\052 %s \052/\n", p->nicename);
1547 if (shortcut)
1548 {
1549 emit ("int <fop>_%04x(context,pc)\n", value);
1550 }
1551 else
1552 {
1553 emit ("int <fop>_%d(context,pc,iwords0)\n", p->idx);
1554 emit ("int iwords0;\n");
1555 }
1556 emit ("sim_state_type *context;\n");
1557 emit ("int pc;\n");
1558 emit ("{\n");
1559 emit ("register unsigned int tmp;\n");
1560 if (shortcut)
1561 {
1562 emit ("register unsigned int iwords0 = 0x%x;\n", value);
1563 }
1564
1565 /* work out how much bigger this opcode could be because it's large
1566 model */
1567 if (BIG)
1568 {
1569 int i;
1570
1571 extra = 0;
1572 for (i = 0; i < 4; i++)
1573 {
1574 if ((p->arg_info[i] & CLASS_MASK) == CLASS_DA
1575 || (p->arg_info[i] & CLASS_MASK) == CLASS_X)
1576 extra += 2;
1577 }
1578 }
1579 else
1580 {
1581 extra = 0;
1582 }
1583 printf (" /* Length %d */ \n", p->length + extra);
1584 switch (p->length + extra)
1585 {
1586 case 2:
1587 emit ("pc += 2\n;");
1588 break;
1589 case 4:
1590 emit ("register unsigned int iwords1 = get_word_mem_da(context,pc+2);\n");
1591 emit ("pc += 4;\n");
1592 break;
1593 case 6:
1594
1595 emit ("register unsigned int iwords1 = get_word_mem_da(context,pc+2);\n");
1596 emit ("register unsigned int iwords2 = get_word_mem_da(context,pc+4);\n");
1597 emit ("pc += 6;\n");
1598 break;
1599 case 8:
1600 emit ("register unsigned int iwords1 = get_word_mem_da(context,pc+2);\n");
1601 emit ("register unsigned int iwords2 = get_word_mem_da(context,pc+4);\n");
1602 emit ("register unsigned int iwords3 = get_word_mem_da(context,pc+6);\n");
1603 emit ("pc += 8;\n");
1604 break;
1605 default:
1606 break;
1607
1608 }
1609 emit ("context->cycles += %d;\n", p->cycles);
1610
1611 emit ("{\n");
1612 info_args (p);
1613 info_special (p, &getdst, &nostore, &before, &nosrc);
1614
1615 info_lvals (p);
1616 if (!nosrc)
1617 {
1618 info_fetch (p, getdst);
1619 }
1620
1621 if (before)
1622 {
1623 info_docode (p);
1624 }
1625 else
1626 {
1627 info_docode (p);
1628 }
1629 if (!nostore)
1630 info_store (p);
1631 emit ("}\n");
1632 emit ("return pc;\n");
1633 emit ("}\n");
1634 }
1635
1636 void
1637 static
one_instruction(i)1638 one_instruction (i)
1639 int i;
1640 {
1641 /* find the table entry */
1642 opcode_entry_type *p = z8k_table + i;
1643
1644 if (!p)
1645 return;
1646 mangle (p, 0, 0);
1647 }
1648
1649 void
add_to_list(ptr,value)1650 add_to_list (ptr, value)
1651 struct opcode_value **ptr;
1652 int value;
1653 {
1654 struct opcode_value *prev;
1655
1656 prev = *ptr;
1657 *ptr = (struct opcode_value *) malloc (sizeof (struct opcode_value));
1658
1659 (*ptr)->n = value;
1660 (*ptr)->next = prev;
1661 }
1662
1663 void
build_list(i)1664 build_list (i)
1665 int i;
1666 {
1667 opcode_entry_type *p = lookup_inst (i);
1668
1669 if (!p)
1670 return;
1671 add_to_list (&list[p->idx], i);
1672 }
1673
1674 int
main(ac,av)1675 main (ac, av)
1676 int ac;
1677 char **av;
1678 {
1679 int i;
1680 int needcomma = 0;
1681
1682 for (i = 1; i < ac; i++)
1683 {
1684 if (strcmp (av[i], "-1") == 0)
1685 file = 1;
1686 if (strcmp (av[i], "-2") == 0)
1687 file = 2;
1688 if (strcmp (av[i], "-3") == 0)
1689 file = 3;
1690 if (strcmp (av[i], "-b3") == 0)
1691 {
1692 file = 3;
1693 BIG = 1;
1694 }
1695
1696 }
1697
1698 /* First work out which opcodes use which bit patterns,
1699 build a list of all matching bit pattens */
1700 for (i = 0; i < 1 << 16; i++)
1701 {
1702 build_list (i);
1703 }
1704 #if DUMP_LIST
1705 for (i = 0; i < NOPS; i++)
1706 {
1707 struct opcode_value *p;
1708
1709 printf ("%d,", i);
1710 p = list[i];
1711 while (p)
1712 {
1713 printf (" %04x,", p->n);
1714 p = p->next;
1715 }
1716 printf ("-1\n");
1717 }
1718
1719 #endif
1720
1721 if (file == 1)
1722 {
1723 extern int quick[];
1724
1725 /* Do the shortcuts */
1726 printf (" /* SHORTCUTS */\n");
1727 for (i = 0; quick[i]; i++)
1728 {
1729 int t = quick[i];
1730
1731 mangle (lookup_inst (t), 1, t);
1732 }
1733 }
1734 if (file == 3)
1735 {
1736 printf (" /* NOT -SHORTCUTS */\n");
1737 for (i = 0; i < NOPS; i++)
1738 {
1739 if (list[i])
1740 {
1741 one_instruction (i);
1742 }
1743 else
1744 {
1745 emit ("int <fop>_%d(context,pc)\n", i);
1746 printf ("sim_state_type *context;\n");
1747 printf ("int pc;\n");
1748 emit ("{ <fop>_bad1();return pc; }\n");
1749 }
1750 }
1751 emit ("int <fop>_bad() ;\n");
1752
1753 /* Write the jump table */
1754 emit ("int (*(<fop>_table[]))() = {");
1755 needcomma = 0;
1756 for (i = 0; i < NOPS; i++)
1757 {
1758 if (needcomma)
1759 printf (",");
1760 emit ("<fop>_%d\n", i);
1761 needcomma = 1;
1762 }
1763 emit ("};\n");
1764 }
1765
1766 if (file == 2)
1767 {
1768 extern int quick[];
1769 /* Static - since it's too be to be automatic on the apollo */
1770 static int big[64 * 1024];
1771
1772 for (i = 0; i < 64 * 1024; i++)
1773 big[i] = 0;
1774
1775 for (i = 0; quick[i]; i++)
1776 {
1777 #if 0
1778
1779 printf ("extern int <fop>_%04x();\n", quick[i]);
1780 #endif
1781
1782 big[quick[i]] = 1;
1783 }
1784
1785 for (i = 0; i < NOPS; i++)
1786 {
1787 #if 0
1788 printf ("extern int fop_%d();\n", i);
1789 #endif
1790 }
1791 #if 0
1792 printf ("extern int fop_bad();\n");
1793 #endif
1794 printf ("struct op_info op_info_table[] = {\n");
1795 for (i = 0; i < 1 << 16; i++)
1796 {
1797 opcode_entry_type *p = lookup_inst (i);
1798
1799 if (needcomma)
1800 printf (",");
1801 #if 0
1802 if (big[i])
1803 {
1804 printf ("<fop>_%04x", i);
1805 }
1806 else
1807 #endif
1808 if (p != NULL)
1809 {
1810 printf ("%d", p->idx);
1811 }
1812 else
1813 printf ("400");
1814 if (p != NULL)
1815 {
1816 printf (" /* %04x %s */\n", i, p->nicename);
1817 }
1818 else
1819 {
1820 printf ("\n");
1821 }
1822 needcomma = 1;
1823 }
1824 printf ("};\n");
1825
1826 }
1827 return 0;
1828 }
1829
1830 char *
insn_ptr(n)1831 insn_ptr (n)
1832 int n;
1833 {
1834 if (BIG)
1835 {
1836 abort ();
1837 }
1838
1839 switch (n)
1840 {
1841 case 4:
1842 return "iwords_1";
1843 default:
1844 return "fail(context,123)";
1845 }
1846 }
1847
1848 /* work out if the opcode only wants lvalues */
1849 int
lvalue(p)1850 lvalue (p)
1851 opcode_entry_type *p;
1852 {
1853 switch (p->opcode)
1854 {
1855 case OPC_lda:
1856 return 1;
1857 case OPC_call:
1858 case OPC_jp:
1859 return 1;
1860 default:
1861 return 0;
1862 }
1863 }
1864
1865 int
info_len_in_words(o)1866 info_len_in_words (o)
1867 opcode_entry_type *o;
1868 {
1869 unsigned int *p = o->byte_info;
1870 int nibs = 0;
1871
1872 while (*p)
1873 {
1874 switch (*p & CLASS_MASK)
1875 {
1876 case CLASS_IGNORE:
1877 case CLASS_BIT:
1878 case CLASS_REGN0:
1879 case CLASS_REG:
1880 case CLASS_01II:
1881 case CLASS_00II:
1882 nibs++;
1883 break;
1884 case CLASS_ADDRESS:
1885 nibs += SIZE_ADDRESS;
1886 break;
1887 case CLASS_IMM:
1888 switch (*p & ~CLASS_MASK)
1889 {
1890 case ARG_IMM16:
1891 nibs += 4;
1892 break;
1893 case ARG_IMM32:
1894 nibs += 8;
1895 break;
1896 case ARG_IMM2:
1897 case ARG_IMM4:
1898 case ARG_NIM4:
1899 case ARG_IMM4M1:
1900 case ARG_IMM_1:
1901 case ARG_IMM_2:
1902 case ARG_IMMNMINUS1:
1903 nibs++;
1904 break;
1905 case ARG_NIM8:
1906
1907 case ARG_IMM8:
1908 nibs += 2;
1909 break;
1910 default:
1911 abort ();
1912 }
1913 break;
1914 case CLASS_DISP:
1915 switch (*p & ~CLASS_MASK)
1916 {
1917 case ARG_DISP16:
1918 nibs += 4;
1919 break;
1920 case ARG_DISP12:
1921 nibs += 3;
1922 break;
1923 case ARG_DISP8:
1924 nibs += 2;
1925 break;
1926 default:
1927 abort ();
1928 }
1929 break;
1930 case CLASS_0DISP7:
1931 case CLASS_1DISP7:
1932 case CLASS_DISP8:
1933 nibs += 2;
1934 break;
1935 case CLASS_BIT_1OR2:
1936 case CLASS_0CCC:
1937 case CLASS_1CCC:
1938 case CLASS_CC:
1939 nibs++;
1940 break;
1941 default:
1942 emit ("don't know %x\n", *p);
1943 }
1944 p++;
1945 }
1946
1947 return nibs / 4; /* return umber of words */
1948 }
1949