1 /* $NetBSD: sljitNativePPC_32.c,v 1.4 2019/01/20 23:14:16 alnsn Exp $ */
2
3 /*
4 * Stack-less Just-In-Time compiler
5 *
6 * Copyright 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 return push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2));
125
126 case SLJIT_SUB:
127 if (flags & ALT_FORM1) {
128 SLJIT_ASSERT(src2 == TMP_REG2);
129 return push_inst(compiler, SUBFIC | D(dst) | A(src1) | compiler->imm);
130 }
131 if (flags & (ALT_FORM2 | ALT_FORM3)) {
132 SLJIT_ASSERT(src2 == TMP_REG2);
133 return push_inst(compiler, ((flags & ALT_FORM2) ? CMPI : CMPLI) | CRD(0) | A(src1) | compiler->imm);
134 }
135 if (flags & (ALT_FORM4 | ALT_FORM5)) {
136 return push_inst(compiler, ((flags & ALT_FORM4) ? CMP : CMPL) | CRD(0) | A(src1) | B(src2));
137 }
138 if (flags & ALT_FORM6) {
139 SLJIT_ASSERT(src2 == TMP_REG2);
140 FAIL_IF(push_inst(compiler, CMPLI | CRD(0) | A(src1) | compiler->imm));
141 return push_inst(compiler, ADDI | D(dst) | A(src1) | (-compiler->imm & 0xffff));
142 }
143 if (flags & ALT_FORM7) {
144 FAIL_IF(push_inst(compiler, CMPL | CRD(0) | A(src1) | B(src2)));
145 return push_inst(compiler, SUBF | D(dst) | A(src2) | B(src1));
146 }
147 if (!(flags & ALT_SET_FLAGS))
148 return push_inst(compiler, SUBF | D(dst) | A(src2) | B(src1));
149 return push_inst(compiler, SUBFC | OERC(ALT_SET_FLAGS) | D(dst) | A(src2) | B(src1));
150
151 case SLJIT_SUBC:
152 return push_inst(compiler, SUBFE | D(dst) | A(src2) | B(src1));
153
154 case SLJIT_MUL:
155 if (flags & ALT_FORM1) {
156 SLJIT_ASSERT(src2 == TMP_REG2);
157 return push_inst(compiler, MULLI | D(dst) | A(src1) | compiler->imm);
158 }
159 return push_inst(compiler, MULLW | OERC(flags) | D(dst) | A(src2) | B(src1));
160
161 case SLJIT_AND:
162 if (flags & ALT_FORM1) {
163 SLJIT_ASSERT(src2 == TMP_REG2);
164 return push_inst(compiler, ANDI | S(src1) | A(dst) | compiler->imm);
165 }
166 if (flags & ALT_FORM2) {
167 SLJIT_ASSERT(src2 == TMP_REG2);
168 return push_inst(compiler, ANDIS | S(src1) | A(dst) | compiler->imm);
169 }
170 return push_inst(compiler, AND | RC(flags) | S(src1) | A(dst) | B(src2));
171
172 case SLJIT_OR:
173 if (flags & ALT_FORM1) {
174 SLJIT_ASSERT(src2 == TMP_REG2);
175 return push_inst(compiler, ORI | S(src1) | A(dst) | compiler->imm);
176 }
177 if (flags & ALT_FORM2) {
178 SLJIT_ASSERT(src2 == TMP_REG2);
179 return push_inst(compiler, ORIS | S(src1) | A(dst) | compiler->imm);
180 }
181 if (flags & ALT_FORM3) {
182 SLJIT_ASSERT(src2 == TMP_REG2);
183 FAIL_IF(push_inst(compiler, ORI | S(src1) | A(dst) | IMM(compiler->imm)));
184 return push_inst(compiler, ORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16));
185 }
186 return push_inst(compiler, OR | RC(flags) | S(src1) | A(dst) | B(src2));
187
188 case SLJIT_XOR:
189 if (flags & ALT_FORM1) {
190 SLJIT_ASSERT(src2 == TMP_REG2);
191 return push_inst(compiler, XORI | S(src1) | A(dst) | compiler->imm);
192 }
193 if (flags & ALT_FORM2) {
194 SLJIT_ASSERT(src2 == TMP_REG2);
195 return push_inst(compiler, XORIS | S(src1) | A(dst) | compiler->imm);
196 }
197 if (flags & ALT_FORM3) {
198 SLJIT_ASSERT(src2 == TMP_REG2);
199 FAIL_IF(push_inst(compiler, XORI | S(src1) | A(dst) | IMM(compiler->imm)));
200 return push_inst(compiler, XORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16));
201 }
202 return push_inst(compiler, XOR | RC(flags) | S(src1) | A(dst) | B(src2));
203
204 case SLJIT_SHL:
205 if (flags & ALT_FORM1) {
206 SLJIT_ASSERT(src2 == TMP_REG2);
207 compiler->imm &= 0x1f;
208 return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11) | ((31 - compiler->imm) << 1));
209 }
210 return push_inst(compiler, SLW | RC(flags) | S(src1) | A(dst) | B(src2));
211
212 case SLJIT_LSHR:
213 if (flags & ALT_FORM1) {
214 SLJIT_ASSERT(src2 == TMP_REG2);
215 compiler->imm &= 0x1f;
216 return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (((32 - compiler->imm) & 0x1f) << 11) | (compiler->imm << 6) | (31 << 1));
217 }
218 return push_inst(compiler, SRW | RC(flags) | S(src1) | A(dst) | B(src2));
219
220 case SLJIT_ASHR:
221 if (flags & ALT_FORM1) {
222 SLJIT_ASSERT(src2 == TMP_REG2);
223 compiler->imm &= 0x1f;
224 return push_inst(compiler, SRAWI | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11));
225 }
226 return push_inst(compiler, SRAW | RC(flags) | S(src1) | A(dst) | B(src2));
227 }
228
229 SLJIT_UNREACHABLE();
230 return SLJIT_SUCCESS;
231 }
232
emit_const(struct sljit_compiler * compiler,sljit_s32 reg,sljit_sw init_value)233 static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 reg, sljit_sw init_value)
234 {
235 FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(init_value >> 16)));
236 return push_inst(compiler, ORI | S(reg) | A(reg) | IMM(init_value));
237 }
238
sljit_set_jump_addr(sljit_uw addr,sljit_uw new_target,sljit_sw executable_offset)239 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset)
240 {
241 sljit_ins *inst = (sljit_ins *)addr;
242
243 inst[0] = (inst[0] & 0xffff0000) | ((new_target >> 16) & 0xffff);
244 inst[1] = (inst[1] & 0xffff0000) | (new_target & 0xffff);
245 inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
246 SLJIT_CACHE_FLUSH(inst, inst + 2);
247 }
248
sljit_set_const(sljit_uw addr,sljit_sw new_constant,sljit_sw executable_offset)249 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant, sljit_sw executable_offset)
250 {
251 sljit_ins *inst = (sljit_ins *)addr;
252
253 inst[0] = (inst[0] & 0xffff0000) | ((new_constant >> 16) & 0xffff);
254 inst[1] = (inst[1] & 0xffff0000) | (new_constant & 0xffff);
255 inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
256 SLJIT_CACHE_FLUSH(inst, inst + 2);
257 }
258