1 /* $NetBSD: sljitNativePPC_32.c,v 1.3 2016/05/29 17:09:33 alnsn Exp $ */
2
3 /*
4 * Stack-less Just-In-Time compiler
5 *
6 * Copyright 2009-2012 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without modification, are
9 * permitted provided that the following conditions are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright notice, this list of
12 * conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
15 * of conditions and the following disclaimer in the documentation and/or other materials
16 * provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
21 * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
23 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
26 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /* ppc 32-bit arch dependent functions. */
30
load_immediate(struct sljit_compiler * compiler,sljit_s32 reg,sljit_sw imm)31 static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 reg, sljit_sw imm)
32 {
33 if (imm <= SIMM_MAX && imm >= SIMM_MIN)
34 return push_inst(compiler, ADDI | D(reg) | A(0) | IMM(imm));
35
36 if (!(imm & ~0xffff))
37 return push_inst(compiler, ORI | S(TMP_ZERO) | A(reg) | IMM(imm));
38
39 FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(imm >> 16)));
40 return (imm & 0xffff) ? push_inst(compiler, ORI | S(reg) | A(reg) | IMM(imm)) : SLJIT_SUCCESS;
41 }
42
43 #define INS_CLEAR_LEFT(dst, src, from) \
44 (RLWINM | S(src) | A(dst) | ((from) << 6) | (31 << 1))
45
emit_single_op(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 flags,sljit_s32 dst,sljit_s32 src1,sljit_s32 src2)46 static SLJIT_INLINE sljit_s32 emit_single_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 flags,
47 sljit_s32 dst, sljit_s32 src1, sljit_s32 src2)
48 {
49 switch (op) {
50 case SLJIT_MOV:
51 case SLJIT_MOV_U32:
52 case SLJIT_MOV_S32:
53 case SLJIT_MOV_P:
54 SLJIT_ASSERT(src1 == TMP_REG1);
55 if (dst != src2)
56 return push_inst(compiler, OR | S(src2) | A(dst) | B(src2));
57 return SLJIT_SUCCESS;
58
59 case SLJIT_MOV_U8:
60 case SLJIT_MOV_S8:
61 SLJIT_ASSERT(src1 == TMP_REG1);
62 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
63 if (op == SLJIT_MOV_S8)
64 return push_inst(compiler, EXTSB | S(src2) | A(dst));
65 return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 24));
66 }
67 else if ((flags & REG_DEST) && op == SLJIT_MOV_S8)
68 return push_inst(compiler, EXTSB | S(src2) | A(dst));
69 else {
70 SLJIT_ASSERT(dst == src2);
71 }
72 return SLJIT_SUCCESS;
73
74 case SLJIT_MOV_U16:
75 case SLJIT_MOV_S16:
76 SLJIT_ASSERT(src1 == TMP_REG1);
77 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
78 if (op == SLJIT_MOV_S16)
79 return push_inst(compiler, EXTSH | S(src2) | A(dst));
80 return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 16));
81 }
82 else {
83 SLJIT_ASSERT(dst == src2);
84 }
85 return SLJIT_SUCCESS;
86
87 case SLJIT_NOT:
88 SLJIT_ASSERT(src1 == TMP_REG1);
89 return push_inst(compiler, NOR | RC(flags) | S(src2) | A(dst) | B(src2));
90
91 case SLJIT_NEG:
92 SLJIT_ASSERT(src1 == TMP_REG1);
93 return push_inst(compiler, NEG | OERC(flags) | D(dst) | A(src2));
94
95 case SLJIT_CLZ:
96 SLJIT_ASSERT(src1 == TMP_REG1);
97 return push_inst(compiler, CNTLZW | RC(flags) | S(src2) | A(dst));
98
99 case SLJIT_ADD:
100 if (flags & ALT_FORM1) {
101 /* Flags does not set: BIN_IMM_EXTS unnecessary. */
102 SLJIT_ASSERT(src2 == TMP_REG2);
103 return push_inst(compiler, ADDI | D(dst) | A(src1) | compiler->imm);
104 }
105 if (flags & ALT_FORM2) {
106 /* Flags does not set: BIN_IMM_EXTS unnecessary. */
107 SLJIT_ASSERT(src2 == TMP_REG2);
108 return push_inst(compiler, ADDIS | D(dst) | A(src1) | compiler->imm);
109 }
110 if (flags & ALT_FORM3) {
111 SLJIT_ASSERT(src2 == TMP_REG2);
112 return push_inst(compiler, ADDIC | D(dst) | A(src1) | compiler->imm);
113 }
114 if (flags & ALT_FORM4) {
115 /* Flags does not set: BIN_IMM_EXTS unnecessary. */
116 FAIL_IF(push_inst(compiler, ADDI | D(dst) | A(src1) | (compiler->imm & 0xffff)));
117 return push_inst(compiler, ADDIS | D(dst) | A(dst) | (((compiler->imm >> 16) & 0xffff) + ((compiler->imm >> 15) & 0x1)));
118 }
119 if (!(flags & ALT_SET_FLAGS))
120 return push_inst(compiler, ADD | D(dst) | A(src1) | B(src2));
121 return push_inst(compiler, ADDC | OERC(ALT_SET_FLAGS) | D(dst) | A(src1) | B(src2));
122
123 case SLJIT_ADDC:
124 if (flags & ALT_FORM1) {
125 FAIL_IF(push_inst(compiler, MFXER | D(0)));
126 FAIL_IF(push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2)));
127 return push_inst(compiler, MTXER | S(0));
128 }
129 return push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2));
130
131 case SLJIT_SUB:
132 if (flags & ALT_FORM1) {
133 /* Flags does not set: BIN_IMM_EXTS unnecessary. */
134 SLJIT_ASSERT(src2 == TMP_REG2);
135 return push_inst(compiler, SUBFIC | D(dst) | A(src1) | compiler->imm);
136 }
137 if (flags & (ALT_FORM2 | ALT_FORM3)) {
138 SLJIT_ASSERT(src2 == TMP_REG2);
139 if (flags & ALT_FORM2)
140 FAIL_IF(push_inst(compiler, CMPI | CRD(0) | A(src1) | compiler->imm));
141 if (flags & ALT_FORM3)
142 return push_inst(compiler, CMPLI | CRD(4) | A(src1) | compiler->imm);
143 return SLJIT_SUCCESS;
144 }
145 if (flags & (ALT_FORM4 | ALT_FORM5)) {
146 if (flags & ALT_FORM4)
147 FAIL_IF(push_inst(compiler, CMPL | CRD(4) | A(src1) | B(src2)));
148 if (flags & ALT_FORM5)
149 FAIL_IF(push_inst(compiler, CMP | CRD(0) | A(src1) | B(src2)));
150 return SLJIT_SUCCESS;
151 }
152 if (!(flags & ALT_SET_FLAGS))
153 return push_inst(compiler, SUBF | D(dst) | A(src2) | B(src1));
154 if (flags & ALT_FORM6)
155 FAIL_IF(push_inst(compiler, CMPL | CRD(4) | A(src1) | B(src2)));
156 return push_inst(compiler, SUBFC | OERC(ALT_SET_FLAGS) | D(dst) | A(src2) | B(src1));
157
158 case SLJIT_SUBC:
159 if (flags & ALT_FORM1) {
160 FAIL_IF(push_inst(compiler, MFXER | D(0)));
161 FAIL_IF(push_inst(compiler, SUBFE | D(dst) | A(src2) | B(src1)));
162 return push_inst(compiler, MTXER | S(0));
163 }
164 return push_inst(compiler, SUBFE | D(dst) | A(src2) | B(src1));
165
166 case SLJIT_MUL:
167 if (flags & ALT_FORM1) {
168 SLJIT_ASSERT(src2 == TMP_REG2);
169 return push_inst(compiler, MULLI | D(dst) | A(src1) | compiler->imm);
170 }
171 return push_inst(compiler, MULLW | OERC(flags) | D(dst) | A(src2) | B(src1));
172
173 case SLJIT_AND:
174 if (flags & ALT_FORM1) {
175 SLJIT_ASSERT(src2 == TMP_REG2);
176 return push_inst(compiler, ANDI | S(src1) | A(dst) | compiler->imm);
177 }
178 if (flags & ALT_FORM2) {
179 SLJIT_ASSERT(src2 == TMP_REG2);
180 return push_inst(compiler, ANDIS | S(src1) | A(dst) | compiler->imm);
181 }
182 return push_inst(compiler, AND | RC(flags) | S(src1) | A(dst) | B(src2));
183
184 case SLJIT_OR:
185 if (flags & ALT_FORM1) {
186 SLJIT_ASSERT(src2 == TMP_REG2);
187 return push_inst(compiler, ORI | S(src1) | A(dst) | compiler->imm);
188 }
189 if (flags & ALT_FORM2) {
190 SLJIT_ASSERT(src2 == TMP_REG2);
191 return push_inst(compiler, ORIS | S(src1) | A(dst) | compiler->imm);
192 }
193 if (flags & ALT_FORM3) {
194 SLJIT_ASSERT(src2 == TMP_REG2);
195 FAIL_IF(push_inst(compiler, ORI | S(src1) | A(dst) | IMM(compiler->imm)));
196 return push_inst(compiler, ORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16));
197 }
198 return push_inst(compiler, OR | RC(flags) | S(src1) | A(dst) | B(src2));
199
200 case SLJIT_XOR:
201 if (flags & ALT_FORM1) {
202 SLJIT_ASSERT(src2 == TMP_REG2);
203 return push_inst(compiler, XORI | S(src1) | A(dst) | compiler->imm);
204 }
205 if (flags & ALT_FORM2) {
206 SLJIT_ASSERT(src2 == TMP_REG2);
207 return push_inst(compiler, XORIS | S(src1) | A(dst) | compiler->imm);
208 }
209 if (flags & ALT_FORM3) {
210 SLJIT_ASSERT(src2 == TMP_REG2);
211 FAIL_IF(push_inst(compiler, XORI | S(src1) | A(dst) | IMM(compiler->imm)));
212 return push_inst(compiler, XORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16));
213 }
214 return push_inst(compiler, XOR | RC(flags) | S(src1) | A(dst) | B(src2));
215
216 case SLJIT_SHL:
217 if (flags & ALT_FORM1) {
218 SLJIT_ASSERT(src2 == TMP_REG2);
219 compiler->imm &= 0x1f;
220 return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11) | ((31 - compiler->imm) << 1));
221 }
222 return push_inst(compiler, SLW | RC(flags) | S(src1) | A(dst) | B(src2));
223
224 case SLJIT_LSHR:
225 if (flags & ALT_FORM1) {
226 SLJIT_ASSERT(src2 == TMP_REG2);
227 compiler->imm &= 0x1f;
228 return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (((32 - compiler->imm) & 0x1f) << 11) | (compiler->imm << 6) | (31 << 1));
229 }
230 return push_inst(compiler, SRW | RC(flags) | S(src1) | A(dst) | B(src2));
231
232 case SLJIT_ASHR:
233 if (flags & ALT_FORM3)
234 FAIL_IF(push_inst(compiler, MFXER | D(0)));
235 if (flags & ALT_FORM1) {
236 SLJIT_ASSERT(src2 == TMP_REG2);
237 compiler->imm &= 0x1f;
238 FAIL_IF(push_inst(compiler, SRAWI | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11)));
239 }
240 else
241 FAIL_IF(push_inst(compiler, SRAW | RC(flags) | S(src1) | A(dst) | B(src2)));
242 return (flags & ALT_FORM3) ? push_inst(compiler, MTXER | S(0)) : SLJIT_SUCCESS;
243 }
244
245 SLJIT_ASSERT_STOP();
246 return SLJIT_SUCCESS;
247 }
248
emit_const(struct sljit_compiler * compiler,sljit_s32 reg,sljit_sw init_value)249 static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 reg, sljit_sw init_value)
250 {
251 FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(init_value >> 16)));
252 return push_inst(compiler, ORI | S(reg) | A(reg) | IMM(init_value));
253 }
254
sljit_set_jump_addr(sljit_uw addr,sljit_uw new_addr)255 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr)
256 {
257 sljit_ins *inst = (sljit_ins*)addr;
258
259 inst[0] = (inst[0] & 0xffff0000) | ((new_addr >> 16) & 0xffff);
260 inst[1] = (inst[1] & 0xffff0000) | (new_addr & 0xffff);
261 SLJIT_CACHE_FLUSH(inst, inst + 2);
262 }
263
sljit_set_const(sljit_uw addr,sljit_sw new_constant)264 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant)
265 {
266 sljit_ins *inst = (sljit_ins*)addr;
267
268 inst[0] = (inst[0] & 0xffff0000) | ((new_constant >> 16) & 0xffff);
269 inst[1] = (inst[1] & 0xffff0000) | (new_constant & 0xffff);
270 SLJIT_CACHE_FLUSH(inst, inst + 2);
271 }
272