/[pcre]/code/trunk/sljit/sljitNativePPC_32.c
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Contents of /code/trunk/sljit/sljitNativePPC_32.c

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Revision 662 - (show annotations) (download)
Mon Aug 22 14:35:22 2011 UTC (2 years, 11 months ago) by ph10
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JIT compiler source

1 /*
2 * Stack-less Just-In-Time compiler
3 *
4 * Copyright 2009-2010 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without modification, are
7 * permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice, this list of
10 * conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
13 * of conditions and the following disclaimer in the documentation and/or other materials
14 * provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19 * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
21 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
22 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 /* ppc 32-bit arch dependent functions. */
28
29 static int load_immediate(struct sljit_compiler *compiler, int reg, sljit_w imm)
30 {
31 if (imm <= SIMM_MAX && imm >= SIMM_MIN)
32 return push_inst(compiler, ADDI | D(reg) | A(0) | IMM(imm));
33
34 FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(imm >> 16)));
35 return (imm & 0xffff) ? push_inst(compiler, ORI | S(reg) | A(reg) | IMM(imm)) : SLJIT_SUCCESS;
36 }
37
38 #define INS_CLEAR_LEFT(dst, src, from) \
39 (RLWINM | S(src) | A(dst) | ((from) << 6) | (31 << 1))
40
41 static SLJIT_INLINE int emit_single_op(struct sljit_compiler *compiler, int op, int flags,
42 int dst, int src1, int src2)
43 {
44 switch (op) {
45 case SLJIT_ADD:
46 if (flags & ALT_FORM1) {
47 SLJIT_ASSERT(src2 == TMP_REG2);
48 return push_inst(compiler, ADDI | D(dst) | A(src1) | compiler->imm);
49 }
50 if (flags & ALT_FORM2) {
51 SLJIT_ASSERT(src2 == TMP_REG2);
52 return push_inst(compiler, ADDIS | D(dst) | A(src1) | compiler->imm);
53 }
54 if (flags & ALT_FORM3) {
55 SLJIT_ASSERT(src2 == TMP_REG2);
56 return push_inst(compiler, ADDIC | D(dst) | A(src1) | compiler->imm);
57 }
58 if (!(flags & ALT_SET_FLAGS))
59 return push_inst(compiler, ADD | D(dst) | A(src1) | B(src2));
60 return push_inst(compiler, ADDC | OERC(ALT_SET_FLAGS) | D(dst) | A(src1) | B(src2));
61
62 case SLJIT_ADDC:
63 if (flags & ALT_FORM1) {
64 FAIL_IF(push_inst(compiler, MFXER | S(0)));
65 FAIL_IF(push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2)));
66 return push_inst(compiler, MTXER | S(0));
67 }
68 return push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2));
69
70 case SLJIT_SUB:
71 if (flags & ALT_FORM1) {
72 SLJIT_ASSERT(src2 == TMP_REG2);
73 return push_inst(compiler, SUBFIC | D(dst) | A(src1) | compiler->imm);
74 }
75 if (flags & ALT_FORM2) {
76 SLJIT_ASSERT(src2 == TMP_REG2);
77 return push_inst(compiler, CMPI | CRD(0) | A(src1) | compiler->imm);
78 }
79 if (flags & ALT_FORM3) {
80 SLJIT_ASSERT(src2 == TMP_REG2);
81 return push_inst(compiler, CMPLI | CRD(4) | A(src1) | compiler->imm);
82 }
83 if (flags & ALT_FORM4)
84 return push_inst(compiler, CMPL | CRD(4) | A(src1) | B(src2));
85 if (!(flags & ALT_SET_FLAGS))
86 return push_inst(compiler, SUBF | D(dst) | A(src2) | B(src1));
87 if (flags & ALT_FORM5)
88 FAIL_IF(push_inst(compiler, CMPL | CRD(4) | A(src1) | B(src2)));
89 return push_inst(compiler, SUBFC | OERC(ALT_SET_FLAGS) | D(dst) | A(src2) | B(src1));
90
91 case SLJIT_SUBC:
92 if (flags & ALT_FORM1) {
93 FAIL_IF(push_inst(compiler, MFXER | S(0)));
94 FAIL_IF(push_inst(compiler, SUBFE | D(dst) | A(src2) | B(src1)));
95 return push_inst(compiler, MTXER | S(0));
96 }
97 return push_inst(compiler, SUBFE | D(dst) | A(src2) | B(src1));
98
99 case SLJIT_MUL:
100 if (flags & ALT_FORM1) {
101 SLJIT_ASSERT(src2 == TMP_REG2);
102 return push_inst(compiler, MULLI | D(dst) | A(src1) | compiler->imm);
103 }
104 return push_inst(compiler, MULLW | OERC(flags) | D(dst) | A(src2) | B(src1));
105
106 case SLJIT_AND:
107 if (flags & ALT_FORM1) {
108 SLJIT_ASSERT(src2 == TMP_REG2);
109 return push_inst(compiler, ANDI | S(src1) | A(dst) | compiler->imm);
110 }
111 if (flags & ALT_FORM2) {
112 SLJIT_ASSERT(src2 == TMP_REG2);
113 return push_inst(compiler, ANDIS | S(src1) | A(dst) | compiler->imm);
114 }
115 return push_inst(compiler, AND | RC(flags) | S(src1) | A(dst) | B(src2));
116
117 case SLJIT_OR:
118 if (flags & ALT_FORM1) {
119 SLJIT_ASSERT(src2 == TMP_REG2);
120 return push_inst(compiler, ORI | S(src1) | A(dst) | compiler->imm);
121 }
122 if (flags & ALT_FORM2) {
123 SLJIT_ASSERT(src2 == TMP_REG2);
124 return push_inst(compiler, ORIS | S(src1) | A(dst) | compiler->imm);
125 }
126 if (flags & ALT_FORM3) {
127 SLJIT_ASSERT(src2 == TMP_REG2);
128 FAIL_IF(push_inst(compiler, ORI | S(src1) | A(dst) | IMM(compiler->imm)));
129 return push_inst(compiler, ORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16));
130 }
131 return push_inst(compiler, OR | RC(flags) | S(src1) | A(dst) | B(src2));
132
133 case SLJIT_XOR:
134 if (flags & ALT_FORM1) {
135 SLJIT_ASSERT(src2 == TMP_REG2);
136 return push_inst(compiler, XORI | S(src1) | A(dst) | compiler->imm);
137 }
138 if (flags & ALT_FORM2) {
139 SLJIT_ASSERT(src2 == TMP_REG2);
140 return push_inst(compiler, XORIS | S(src1) | A(dst) | compiler->imm);
141 }
142 if (flags & ALT_FORM3) {
143 SLJIT_ASSERT(src2 == TMP_REG2);
144 FAIL_IF(push_inst(compiler, XORI | S(src1) | A(dst) | IMM(compiler->imm)));
145 return push_inst(compiler, XORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16));
146 }
147 return push_inst(compiler, XOR | RC(flags) | S(src1) | A(dst) | B(src2));
148
149 case SLJIT_SHL:
150 if (flags & ALT_FORM1) {
151 SLJIT_ASSERT(src2 == TMP_REG2);
152 compiler->imm &= 0x1f;
153 return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11) | ((31 - compiler->imm) << 1));
154 }
155 return push_inst(compiler, SLW | RC(flags) | S(src1) | A(dst) | B(src2));
156
157 case SLJIT_LSHR:
158 if (flags & ALT_FORM1) {
159 SLJIT_ASSERT(src2 == TMP_REG2);
160 compiler->imm &= 0x1f;
161 return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (((32 - compiler->imm) & 0x1f) << 11) | (compiler->imm << 6) | (31 << 1));
162 }
163 return push_inst(compiler, SRW | RC(flags) | S(src1) | A(dst) | B(src2));
164
165 case SLJIT_ASHR:
166 if (flags & ALT_FORM1) {
167 SLJIT_ASSERT(src2 == TMP_REG2);
168 compiler->imm &= 0x1f;
169 return push_inst(compiler, SRAWI | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11));
170 }
171 return push_inst(compiler, SRAW | RC(flags) | S(src1) | A(dst) | B(src2));
172
173 case SLJIT_MOV:
174 case SLJIT_MOV_UI:
175 case SLJIT_MOV_SI:
176 SLJIT_ASSERT(src1 == TMP_REG1);
177 if (dst != src2)
178 return push_inst(compiler, OR | S(src2) | A(dst) | B(src2));
179 return SLJIT_SUCCESS;
180
181 case SLJIT_MOV_UB:
182 case SLJIT_MOV_SB:
183 SLJIT_ASSERT(src1 == TMP_REG1);
184 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
185 if (op == SLJIT_MOV_SB)
186 return push_inst(compiler, EXTSB | S(src2) | A(dst));
187 return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 24));
188 }
189 else if ((flags & REG_DEST) && op == SLJIT_MOV_SB)
190 return push_inst(compiler, EXTSB | S(src2) | A(dst));
191 else if (dst != src2)
192 SLJIT_ASSERT_STOP();
193 return SLJIT_SUCCESS;
194
195 case SLJIT_MOV_UH:
196 case SLJIT_MOV_SH:
197 SLJIT_ASSERT(src1 == TMP_REG1);
198 if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
199 if (op == SLJIT_MOV_SH)
200 return push_inst(compiler, EXTSH | S(src2) | A(dst));
201 return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 16));
202 }
203 else if (dst != src2)
204 SLJIT_ASSERT_STOP();
205 return SLJIT_SUCCESS;
206
207 case SLJIT_NOT:
208 SLJIT_ASSERT(src1 == TMP_REG1);
209 return push_inst(compiler, NOR | RC(flags) | S(src2) | A(dst) | B(src2));
210
211 case SLJIT_NEG:
212 SLJIT_ASSERT(src1 == TMP_REG1);
213 return push_inst(compiler, NEG | OERC(flags) | D(dst) | A(src2));
214
215 case SLJIT_CLZ:
216 SLJIT_ASSERT(src1 == TMP_REG1);
217 return push_inst(compiler, CNTLZW | RC(flags) | S(src2) | A(dst));
218 }
219
220 SLJIT_ASSERT_STOP();
221 return SLJIT_SUCCESS;
222 }
223
224 static SLJIT_INLINE int emit_const(struct sljit_compiler *compiler, int reg, sljit_w init_value)
225 {
226 FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(init_value >> 16)));
227 return push_inst(compiler, ORI | S(reg) | A(reg) | IMM(init_value));
228 }
229
230 void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr)
231 {
232 sljit_ins *inst = (sljit_ins*)addr;
233
234 inst[0] = (inst[0] & 0xffff0000) | ((new_addr >> 16) & 0xffff);
235 inst[1] = (inst[1] & 0xffff0000) | (new_addr & 0xffff);
236 SLJIT_CACHE_FLUSH(inst, inst + 2);
237 }
238
239 void sljit_set_const(sljit_uw addr, sljit_w new_constant)
240 {
241 sljit_ins *inst = (sljit_ins*)addr;
242
243 inst[0] = (inst[0] & 0xffff0000) | ((new_constant >> 16) & 0xffff);
244 inst[1] = (inst[1] & 0xffff0000) | (new_constant & 0xffff);
245 SLJIT_CACHE_FLUSH(inst, inst + 2);
246 }

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