/[pcre]/code/trunk/sljit/sljitNativeX86_32.c
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Contents of /code/trunk/sljit/sljitNativeX86_32.c

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Revision 1754 - (show annotations)
Wed Jul 17 07:17:16 2019 UTC (8 months, 2 weeks ago) by zherczeg
File MIME type: text/plain
File size: 26622 byte(s)
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JIT compiler update.
1 /*
2 * Stack-less Just-In-Time compiler
3 *
4 * Copyright 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 /* x86 32-bit arch dependent functions. */
28
29 static sljit_s32 emit_do_imm(struct sljit_compiler *compiler, sljit_u8 opcode, sljit_sw imm)
30 {
31 sljit_u8 *inst;
32
33 inst = (sljit_u8*)ensure_buf(compiler, 1 + 1 + sizeof(sljit_sw));
34 FAIL_IF(!inst);
35 INC_SIZE(1 + sizeof(sljit_sw));
36 *inst++ = opcode;
37 sljit_unaligned_store_sw(inst, imm);
38 return SLJIT_SUCCESS;
39 }
40
41 static sljit_u8* generate_far_jump_code(struct sljit_jump *jump, sljit_u8 *code_ptr, sljit_sw executable_offset)
42 {
43 sljit_s32 type = jump->flags >> TYPE_SHIFT;
44
45 if (type == SLJIT_JUMP) {
46 *code_ptr++ = JMP_i32;
47 jump->addr++;
48 }
49 else if (type >= SLJIT_FAST_CALL) {
50 *code_ptr++ = CALL_i32;
51 jump->addr++;
52 }
53 else {
54 *code_ptr++ = GROUP_0F;
55 *code_ptr++ = get_jump_code(type);
56 jump->addr += 2;
57 }
58
59 if (jump->flags & JUMP_LABEL)
60 jump->flags |= PATCH_MW;
61 else
62 sljit_unaligned_store_sw(code_ptr, jump->u.target - (jump->addr + 4) - (sljit_uw)executable_offset);
63 code_ptr += 4;
64
65 return code_ptr;
66 }
67
68 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_enter(struct sljit_compiler *compiler,
69 sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
70 sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
71 {
72 sljit_s32 args, size;
73 sljit_u8 *inst;
74
75 CHECK_ERROR();
76 CHECK(check_sljit_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
77 set_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
78
79 args = get_arg_count(arg_types);
80 compiler->args = args;
81
82 /* [esp+0] for saving temporaries and function calls. */
83 compiler->stack_tmp_size = 2 * sizeof(sljit_sw);
84
85 #if !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
86 if (scratches > 3)
87 compiler->stack_tmp_size = 3 * sizeof(sljit_sw);
88 #endif
89
90 compiler->saveds_offset = compiler->stack_tmp_size;
91 if (scratches > 3)
92 compiler->saveds_offset += ((scratches > (3 + 6)) ? 6 : (scratches - 3)) * sizeof(sljit_sw);
93
94 compiler->locals_offset = compiler->saveds_offset;
95
96 if (saveds > 3)
97 compiler->locals_offset += (saveds - 3) * sizeof(sljit_sw);
98
99 if (options & SLJIT_F64_ALIGNMENT)
100 compiler->locals_offset = (compiler->locals_offset + sizeof(sljit_f64) - 1) & ~(sizeof(sljit_f64) - 1);
101
102 size = 1 + (scratches > 9 ? (scratches - 9) : 0) + (saveds <= 3 ? saveds : 3);
103 #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
104 size += (args > 0 ? (args * 2) : 0) + (args > 2 ? 2 : 0);
105 #else
106 size += (args > 0 ? (2 + args * 3) : 0);
107 #endif
108 inst = (sljit_u8*)ensure_buf(compiler, 1 + size);
109 FAIL_IF(!inst);
110
111 INC_SIZE(size);
112 PUSH_REG(reg_map[TMP_REG1]);
113 #if !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
114 if (args > 0) {
115 *inst++ = MOV_r_rm;
116 *inst++ = MOD_REG | (reg_map[TMP_REG1] << 3) | 0x4 /* esp */;
117 }
118 #endif
119 if (saveds > 2 || scratches > 9)
120 PUSH_REG(reg_map[SLJIT_S2]);
121 if (saveds > 1 || scratches > 10)
122 PUSH_REG(reg_map[SLJIT_S1]);
123 if (saveds > 0 || scratches > 11)
124 PUSH_REG(reg_map[SLJIT_S0]);
125
126 #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
127 if (args > 0) {
128 inst[0] = MOV_r_rm;
129 inst[1] = MOD_REG | (reg_map[SLJIT_S0] << 3) | reg_map[SLJIT_R2];
130 inst += 2;
131 }
132 if (args > 1) {
133 inst[0] = MOV_r_rm;
134 inst[1] = MOD_REG | (reg_map[SLJIT_S1] << 3) | reg_map[SLJIT_R1];
135 inst += 2;
136 }
137 if (args > 2) {
138 inst[0] = MOV_r_rm;
139 inst[1] = MOD_DISP8 | (reg_map[SLJIT_S2] << 3) | 0x4 /* esp */;
140 inst[2] = 0x24;
141 inst[3] = sizeof(sljit_sw) * (3 + 2); /* saveds >= 3 as well. */
142 }
143 #else
144 if (args > 0) {
145 inst[0] = MOV_r_rm;
146 inst[1] = MOD_DISP8 | (reg_map[SLJIT_S0] << 3) | reg_map[TMP_REG1];
147 inst[2] = sizeof(sljit_sw) * 2;
148 inst += 3;
149 }
150 if (args > 1) {
151 inst[0] = MOV_r_rm;
152 inst[1] = MOD_DISP8 | (reg_map[SLJIT_S1] << 3) | reg_map[TMP_REG1];
153 inst[2] = sizeof(sljit_sw) * 3;
154 inst += 3;
155 }
156 if (args > 2) {
157 inst[0] = MOV_r_rm;
158 inst[1] = MOD_DISP8 | (reg_map[SLJIT_S2] << 3) | reg_map[TMP_REG1];
159 inst[2] = sizeof(sljit_sw) * 4;
160 }
161 #endif
162
163 SLJIT_ASSERT(SLJIT_LOCALS_OFFSET > 0);
164
165 #if defined(__APPLE__)
166 /* Ignore pushed registers and SLJIT_LOCALS_OFFSET when computing the aligned local size. */
167 saveds = (2 + (scratches > 9 ? (scratches - 9) : 0) + (saveds <= 3 ? saveds : 3)) * sizeof(sljit_uw);
168 local_size = ((SLJIT_LOCALS_OFFSET + saveds + local_size + 15) & ~15) - saveds;
169 #else
170 if (options & SLJIT_F64_ALIGNMENT)
171 local_size = SLJIT_LOCALS_OFFSET + ((local_size + sizeof(sljit_f64) - 1) & ~(sizeof(sljit_f64) - 1));
172 else
173 local_size = SLJIT_LOCALS_OFFSET + ((local_size + sizeof(sljit_sw) - 1) & ~(sizeof(sljit_sw) - 1));
174 #endif
175
176 compiler->local_size = local_size;
177
178 #ifdef _WIN32
179 if (local_size > 0) {
180 if (local_size <= 4 * 4096) {
181 if (local_size > 4096)
182 EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), -4096);
183 if (local_size > 2 * 4096)
184 EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), -4096 * 2);
185 if (local_size > 3 * 4096)
186 EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), -4096 * 3);
187 }
188 else {
189 EMIT_MOV(compiler, SLJIT_R0, 0, SLJIT_SP, 0);
190 EMIT_MOV(compiler, SLJIT_R1, 0, SLJIT_IMM, (local_size - 1) >> 12);
191
192 SLJIT_ASSERT (reg_map[SLJIT_R0] == 0);
193
194 EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_R0), -4096);
195 FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB),
196 SLJIT_R0, 0, SLJIT_R0, 0, SLJIT_IMM, 4096));
197 FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB),
198 SLJIT_R1, 0, SLJIT_R1, 0, SLJIT_IMM, 1));
199
200 inst = (sljit_u8*)ensure_buf(compiler, 1 + 2);
201 FAIL_IF(!inst);
202
203 INC_SIZE(2);
204 inst[0] = JNE_i8;
205 inst[1] = (sljit_s8) -16;
206 }
207
208 EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), -local_size);
209 }
210 #endif
211
212 SLJIT_ASSERT(local_size > 0);
213
214 #if !defined(__APPLE__)
215 if (options & SLJIT_F64_ALIGNMENT) {
216 EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_SP, 0);
217
218 /* Some space might allocated during sljit_grow_stack() above on WIN32. */
219 FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB),
220 SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, local_size + sizeof(sljit_sw)));
221
222 #if defined _WIN32 && !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
223 if (compiler->local_size > 1024)
224 FAIL_IF(emit_cum_binary(compiler, BINARY_OPCODE(ADD),
225 TMP_REG1, 0, TMP_REG1, 0, SLJIT_IMM, sizeof(sljit_sw)));
226 #endif
227
228 inst = (sljit_u8*)ensure_buf(compiler, 1 + 6);
229 FAIL_IF(!inst);
230
231 INC_SIZE(6);
232 inst[0] = GROUP_BINARY_81;
233 inst[1] = MOD_REG | AND | reg_map[SLJIT_SP];
234 sljit_unaligned_store_sw(inst + 2, ~(sizeof(sljit_f64) - 1));
235
236 /* The real local size must be used. */
237 return emit_mov(compiler, SLJIT_MEM1(SLJIT_SP), compiler->local_size, TMP_REG1, 0);
238 }
239 #endif
240 return emit_non_cum_binary(compiler, BINARY_OPCODE(SUB),
241 SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, local_size);
242 }
243
244 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_set_context(struct sljit_compiler *compiler,
245 sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
246 sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
247 {
248 CHECK_ERROR();
249 CHECK(check_sljit_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
250 set_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
251
252 compiler->args = get_arg_count(arg_types);
253
254 /* [esp+0] for saving temporaries and function calls. */
255 compiler->stack_tmp_size = 2 * sizeof(sljit_sw);
256
257 #if !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
258 if (scratches > 3)
259 compiler->stack_tmp_size = 3 * sizeof(sljit_sw);
260 #endif
261
262 compiler->saveds_offset = compiler->stack_tmp_size;
263 if (scratches > 3)
264 compiler->saveds_offset += ((scratches > (3 + 6)) ? 6 : (scratches - 3)) * sizeof(sljit_sw);
265
266 compiler->locals_offset = compiler->saveds_offset;
267
268 if (saveds > 3)
269 compiler->locals_offset += (saveds - 3) * sizeof(sljit_sw);
270
271 if (options & SLJIT_F64_ALIGNMENT)
272 compiler->locals_offset = (compiler->locals_offset + sizeof(sljit_f64) - 1) & ~(sizeof(sljit_f64) - 1);
273
274 #if defined(__APPLE__)
275 saveds = (2 + (scratches > 9 ? (scratches - 9) : 0) + (saveds <= 3 ? saveds : 3)) * sizeof(sljit_uw);
276 compiler->local_size = ((SLJIT_LOCALS_OFFSET + saveds + local_size + 15) & ~15) - saveds;
277 #else
278 if (options & SLJIT_F64_ALIGNMENT)
279 compiler->local_size = SLJIT_LOCALS_OFFSET + ((local_size + sizeof(sljit_f64) - 1) & ~(sizeof(sljit_f64) - 1));
280 else
281 compiler->local_size = SLJIT_LOCALS_OFFSET + ((local_size + sizeof(sljit_sw) - 1) & ~(sizeof(sljit_sw) - 1));
282 #endif
283 return SLJIT_SUCCESS;
284 }
285
286 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 src, sljit_sw srcw)
287 {
288 sljit_s32 size;
289 sljit_u8 *inst;
290
291 CHECK_ERROR();
292 CHECK(check_sljit_emit_return(compiler, op, src, srcw));
293 SLJIT_ASSERT(compiler->args >= 0);
294
295 FAIL_IF(emit_mov_before_return(compiler, op, src, srcw));
296
297 SLJIT_ASSERT(compiler->local_size > 0);
298
299 #if !defined(__APPLE__)
300 if (compiler->options & SLJIT_F64_ALIGNMENT)
301 EMIT_MOV(compiler, SLJIT_SP, 0, SLJIT_MEM1(SLJIT_SP), compiler->local_size)
302 else
303 FAIL_IF(emit_cum_binary(compiler, BINARY_OPCODE(ADD),
304 SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, compiler->local_size));
305 #else
306 FAIL_IF(emit_cum_binary(compiler, BINARY_OPCODE(ADD),
307 SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, compiler->local_size));
308 #endif
309
310 size = 2 + (compiler->scratches > 7 ? (compiler->scratches - 7) : 0) +
311 (compiler->saveds <= 3 ? compiler->saveds : 3);
312 #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
313 if (compiler->args > 2)
314 size += 2;
315 #else
316 if (compiler->args > 0)
317 size += 2;
318 #endif
319 inst = (sljit_u8*)ensure_buf(compiler, 1 + size);
320 FAIL_IF(!inst);
321
322 INC_SIZE(size);
323
324 if (compiler->saveds > 0 || compiler->scratches > 11)
325 POP_REG(reg_map[SLJIT_S0]);
326 if (compiler->saveds > 1 || compiler->scratches > 10)
327 POP_REG(reg_map[SLJIT_S1]);
328 if (compiler->saveds > 2 || compiler->scratches > 9)
329 POP_REG(reg_map[SLJIT_S2]);
330 POP_REG(reg_map[TMP_REG1]);
331 #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
332 if (compiler->args > 2)
333 RET_I16(sizeof(sljit_sw));
334 else
335 RET();
336 #else
337 RET();
338 #endif
339
340 return SLJIT_SUCCESS;
341 }
342
343 /* --------------------------------------------------------------------- */
344 /* Operators */
345 /* --------------------------------------------------------------------- */
346
347 /* Size contains the flags as well. */
348 static sljit_u8* emit_x86_instruction(struct sljit_compiler *compiler, sljit_s32 size,
349 /* The register or immediate operand. */
350 sljit_s32 a, sljit_sw imma,
351 /* The general operand (not immediate). */
352 sljit_s32 b, sljit_sw immb)
353 {
354 sljit_u8 *inst;
355 sljit_u8 *buf_ptr;
356 sljit_s32 flags = size & ~0xf;
357 sljit_s32 inst_size;
358
359 /* Both cannot be switched on. */
360 SLJIT_ASSERT((flags & (EX86_BIN_INS | EX86_SHIFT_INS)) != (EX86_BIN_INS | EX86_SHIFT_INS));
361 /* Size flags not allowed for typed instructions. */
362 SLJIT_ASSERT(!(flags & (EX86_BIN_INS | EX86_SHIFT_INS)) || (flags & (EX86_BYTE_ARG | EX86_HALF_ARG)) == 0);
363 /* Both size flags cannot be switched on. */
364 SLJIT_ASSERT((flags & (EX86_BYTE_ARG | EX86_HALF_ARG)) != (EX86_BYTE_ARG | EX86_HALF_ARG));
365 /* SSE2 and immediate is not possible. */
366 SLJIT_ASSERT(!(a & SLJIT_IMM) || !(flags & EX86_SSE2));
367 SLJIT_ASSERT((flags & (EX86_PREF_F2 | EX86_PREF_F3)) != (EX86_PREF_F2 | EX86_PREF_F3)
368 && (flags & (EX86_PREF_F2 | EX86_PREF_66)) != (EX86_PREF_F2 | EX86_PREF_66)
369 && (flags & (EX86_PREF_F3 | EX86_PREF_66)) != (EX86_PREF_F3 | EX86_PREF_66));
370
371 size &= 0xf;
372 inst_size = size;
373
374 if (flags & (EX86_PREF_F2 | EX86_PREF_F3))
375 inst_size++;
376 if (flags & EX86_PREF_66)
377 inst_size++;
378
379 /* Calculate size of b. */
380 inst_size += 1; /* mod r/m byte. */
381 if (b & SLJIT_MEM) {
382 if ((b & REG_MASK) == SLJIT_UNUSED)
383 inst_size += sizeof(sljit_sw);
384 else if (immb != 0 && !(b & OFFS_REG_MASK)) {
385 /* Immediate operand. */
386 if (immb <= 127 && immb >= -128)
387 inst_size += sizeof(sljit_s8);
388 else
389 inst_size += sizeof(sljit_sw);
390 }
391
392 if ((b & REG_MASK) == SLJIT_SP && !(b & OFFS_REG_MASK))
393 b |= TO_OFFS_REG(SLJIT_SP);
394
395 if ((b & OFFS_REG_MASK) != SLJIT_UNUSED)
396 inst_size += 1; /* SIB byte. */
397 }
398
399 /* Calculate size of a. */
400 if (a & SLJIT_IMM) {
401 if (flags & EX86_BIN_INS) {
402 if (imma <= 127 && imma >= -128) {
403 inst_size += 1;
404 flags |= EX86_BYTE_ARG;
405 } else
406 inst_size += 4;
407 }
408 else if (flags & EX86_SHIFT_INS) {
409 imma &= 0x1f;
410 if (imma != 1) {
411 inst_size ++;
412 flags |= EX86_BYTE_ARG;
413 }
414 } else if (flags & EX86_BYTE_ARG)
415 inst_size++;
416 else if (flags & EX86_HALF_ARG)
417 inst_size += sizeof(short);
418 else
419 inst_size += sizeof(sljit_sw);
420 }
421 else
422 SLJIT_ASSERT(!(flags & EX86_SHIFT_INS) || a == SLJIT_PREF_SHIFT_REG);
423
424 inst = (sljit_u8*)ensure_buf(compiler, 1 + inst_size);
425 PTR_FAIL_IF(!inst);
426
427 /* Encoding the byte. */
428 INC_SIZE(inst_size);
429 if (flags & EX86_PREF_F2)
430 *inst++ = 0xf2;
431 if (flags & EX86_PREF_F3)
432 *inst++ = 0xf3;
433 if (flags & EX86_PREF_66)
434 *inst++ = 0x66;
435
436 buf_ptr = inst + size;
437
438 /* Encode mod/rm byte. */
439 if (!(flags & EX86_SHIFT_INS)) {
440 if ((flags & EX86_BIN_INS) && (a & SLJIT_IMM))
441 *inst = (flags & EX86_BYTE_ARG) ? GROUP_BINARY_83 : GROUP_BINARY_81;
442
443 if (a & SLJIT_IMM)
444 *buf_ptr = 0;
445 else if (!(flags & EX86_SSE2_OP1))
446 *buf_ptr = reg_map[a] << 3;
447 else
448 *buf_ptr = a << 3;
449 }
450 else {
451 if (a & SLJIT_IMM) {
452 if (imma == 1)
453 *inst = GROUP_SHIFT_1;
454 else
455 *inst = GROUP_SHIFT_N;
456 } else
457 *inst = GROUP_SHIFT_CL;
458 *buf_ptr = 0;
459 }
460
461 if (!(b & SLJIT_MEM))
462 *buf_ptr++ |= MOD_REG + ((!(flags & EX86_SSE2_OP2)) ? reg_map[b] : b);
463 else if ((b & REG_MASK) != SLJIT_UNUSED) {
464 if ((b & OFFS_REG_MASK) == SLJIT_UNUSED || (b & OFFS_REG_MASK) == TO_OFFS_REG(SLJIT_SP)) {
465 if (immb != 0) {
466 if (immb <= 127 && immb >= -128)
467 *buf_ptr |= 0x40;
468 else
469 *buf_ptr |= 0x80;
470 }
471
472 if ((b & OFFS_REG_MASK) == SLJIT_UNUSED)
473 *buf_ptr++ |= reg_map[b & REG_MASK];
474 else {
475 *buf_ptr++ |= 0x04;
476 *buf_ptr++ = reg_map[b & REG_MASK] | (reg_map[OFFS_REG(b)] << 3);
477 }
478
479 if (immb != 0) {
480 if (immb <= 127 && immb >= -128)
481 *buf_ptr++ = immb; /* 8 bit displacement. */
482 else {
483 sljit_unaligned_store_sw(buf_ptr, immb); /* 32 bit displacement. */
484 buf_ptr += sizeof(sljit_sw);
485 }
486 }
487 }
488 else {
489 *buf_ptr++ |= 0x04;
490 *buf_ptr++ = reg_map[b & REG_MASK] | (reg_map[OFFS_REG(b)] << 3) | (immb << 6);
491 }
492 }
493 else {
494 *buf_ptr++ |= 0x05;
495 sljit_unaligned_store_sw(buf_ptr, immb); /* 32 bit displacement. */
496 buf_ptr += sizeof(sljit_sw);
497 }
498
499 if (a & SLJIT_IMM) {
500 if (flags & EX86_BYTE_ARG)
501 *buf_ptr = imma;
502 else if (flags & EX86_HALF_ARG)
503 sljit_unaligned_store_s16(buf_ptr, imma);
504 else if (!(flags & EX86_SHIFT_INS))
505 sljit_unaligned_store_sw(buf_ptr, imma);
506 }
507
508 return !(flags & EX86_SHIFT_INS) ? inst : (inst + 1);
509 }
510
511 /* --------------------------------------------------------------------- */
512 /* Call / return instructions */
513 /* --------------------------------------------------------------------- */
514
515 #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
516
517 static sljit_s32 c_fast_call_get_stack_size(sljit_s32 arg_types, sljit_s32 *word_arg_count_ptr)
518 {
519 sljit_s32 stack_size = 0;
520 sljit_s32 word_arg_count = 0;
521
522 arg_types >>= SLJIT_DEF_SHIFT;
523
524 while (arg_types) {
525 switch (arg_types & SLJIT_DEF_MASK) {
526 case SLJIT_ARG_TYPE_F32:
527 stack_size += sizeof(sljit_f32);
528 break;
529 case SLJIT_ARG_TYPE_F64:
530 stack_size += sizeof(sljit_f64);
531 break;
532 default:
533 word_arg_count++;
534 if (word_arg_count > 2)
535 stack_size += sizeof(sljit_sw);
536 break;
537 }
538
539 arg_types >>= SLJIT_DEF_SHIFT;
540 }
541
542 if (word_arg_count_ptr)
543 *word_arg_count_ptr = word_arg_count;
544
545 return stack_size;
546 }
547
548 static sljit_s32 c_fast_call_with_args(struct sljit_compiler *compiler,
549 sljit_s32 arg_types, sljit_s32 stack_size, sljit_s32 word_arg_count, sljit_s32 swap_args)
550 {
551 sljit_u8 *inst;
552 sljit_s32 float_arg_count;
553
554 if (stack_size == sizeof(sljit_sw) && word_arg_count == 3) {
555 inst = (sljit_u8*)ensure_buf(compiler, 1 + 1);
556 FAIL_IF(!inst);
557 INC_SIZE(1);
558 PUSH_REG(reg_map[SLJIT_R2]);
559 }
560 else if (stack_size > 0) {
561 if (word_arg_count >= 4)
562 EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), compiler->saveds_offset - sizeof(sljit_sw));
563
564 FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB),
565 SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, stack_size));
566
567 stack_size = 0;
568 arg_types >>= SLJIT_DEF_SHIFT;
569 word_arg_count = 0;
570 float_arg_count = 0;
571 while (arg_types) {
572 switch (arg_types & SLJIT_DEF_MASK) {
573 case SLJIT_ARG_TYPE_F32:
574 float_arg_count++;
575 FAIL_IF(emit_sse2_store(compiler, 1, SLJIT_MEM1(SLJIT_SP), stack_size, float_arg_count));
576 stack_size += sizeof(sljit_f32);
577 break;
578 case SLJIT_ARG_TYPE_F64:
579 float_arg_count++;
580 FAIL_IF(emit_sse2_store(compiler, 0, SLJIT_MEM1(SLJIT_SP), stack_size, float_arg_count));
581 stack_size += sizeof(sljit_f64);
582 break;
583 default:
584 word_arg_count++;
585 if (word_arg_count == 3) {
586 EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), stack_size, SLJIT_R2, 0);
587 stack_size += sizeof(sljit_sw);
588 }
589 else if (word_arg_count == 4) {
590 EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), stack_size, TMP_REG1, 0);
591 stack_size += sizeof(sljit_sw);
592 }
593 break;
594 }
595
596 arg_types >>= SLJIT_DEF_SHIFT;
597 }
598 }
599
600 if (word_arg_count > 0) {
601 if (swap_args) {
602 inst = (sljit_u8*)ensure_buf(compiler, 1 + 1);
603 FAIL_IF(!inst);
604 INC_SIZE(1);
605
606 *inst++ = XCHG_EAX_r | reg_map[SLJIT_R2];
607 }
608 else {
609 inst = (sljit_u8*)ensure_buf(compiler, 1 + 2);
610 FAIL_IF(!inst);
611 INC_SIZE(2);
612
613 *inst++ = MOV_r_rm;
614 *inst++ = MOD_REG | (reg_map[SLJIT_R2] << 3) | reg_map[SLJIT_R0];
615 }
616 }
617
618 return SLJIT_SUCCESS;
619 }
620
621 #endif
622
623 static sljit_s32 cdecl_call_get_stack_size(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_s32 *word_arg_count_ptr)
624 {
625 sljit_s32 stack_size = 0;
626 sljit_s32 word_arg_count = 0;
627
628 arg_types >>= SLJIT_DEF_SHIFT;
629
630 while (arg_types) {
631 switch (arg_types & SLJIT_DEF_MASK) {
632 case SLJIT_ARG_TYPE_F32:
633 stack_size += sizeof(sljit_f32);
634 break;
635 case SLJIT_ARG_TYPE_F64:
636 stack_size += sizeof(sljit_f64);
637 break;
638 default:
639 word_arg_count++;
640 stack_size += sizeof(sljit_sw);
641 break;
642 }
643
644 arg_types >>= SLJIT_DEF_SHIFT;
645 }
646
647 if (word_arg_count_ptr)
648 *word_arg_count_ptr = word_arg_count;
649
650 if (stack_size <= compiler->stack_tmp_size)
651 return 0;
652
653 #if defined(__APPLE__)
654 return ((stack_size - compiler->stack_tmp_size + 15) & ~15);
655 #else
656 return stack_size - compiler->stack_tmp_size;
657 #endif
658 }
659
660 static sljit_s32 cdecl_call_with_args(struct sljit_compiler *compiler,
661 sljit_s32 arg_types, sljit_s32 stack_size, sljit_s32 word_arg_count)
662 {
663 sljit_s32 float_arg_count = 0;
664
665 if (word_arg_count >= 4)
666 EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), compiler->saveds_offset - sizeof(sljit_sw));
667
668 if (stack_size > 0)
669 FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB),
670 SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, stack_size));
671
672 stack_size = 0;
673 word_arg_count = 0;
674 arg_types >>= SLJIT_DEF_SHIFT;
675
676 while (arg_types) {
677 switch (arg_types & SLJIT_DEF_MASK) {
678 case SLJIT_ARG_TYPE_F32:
679 float_arg_count++;
680 FAIL_IF(emit_sse2_store(compiler, 1, SLJIT_MEM1(SLJIT_SP), stack_size, float_arg_count));
681 stack_size += sizeof(sljit_f32);
682 break;
683 case SLJIT_ARG_TYPE_F64:
684 float_arg_count++;
685 FAIL_IF(emit_sse2_store(compiler, 0, SLJIT_MEM1(SLJIT_SP), stack_size, float_arg_count));
686 stack_size += sizeof(sljit_f64);
687 break;
688 default:
689 word_arg_count++;
690 EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), stack_size, (word_arg_count >= 4) ? TMP_REG1 : word_arg_count, 0);
691 stack_size += sizeof(sljit_sw);
692 break;
693 }
694
695 arg_types >>= SLJIT_DEF_SHIFT;
696 }
697
698 return SLJIT_SUCCESS;
699 }
700
701 static sljit_s32 post_call_with_args(struct sljit_compiler *compiler,
702 sljit_s32 arg_types, sljit_s32 stack_size)
703 {
704 sljit_u8 *inst;
705 sljit_s32 single;
706
707 if (stack_size > 0)
708 FAIL_IF(emit_cum_binary(compiler, BINARY_OPCODE(ADD),
709 SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, stack_size));
710
711 if ((arg_types & SLJIT_DEF_MASK) < SLJIT_ARG_TYPE_F32)
712 return SLJIT_SUCCESS;
713
714 single = ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F32);
715
716 inst = (sljit_u8*)ensure_buf(compiler, 1 + 3);
717 FAIL_IF(!inst);
718 INC_SIZE(3);
719 inst[0] = single ? FSTPS : FSTPD;
720 inst[1] = (0x03 << 3) | 0x04;
721 inst[2] = (0x04 << 3) | reg_map[SLJIT_SP];
722
723 return emit_sse2_load(compiler, single, SLJIT_FR0, SLJIT_MEM1(SLJIT_SP), 0);
724 }
725
726 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type,
727 sljit_s32 arg_types)
728 {
729 struct sljit_jump *jump;
730 sljit_s32 stack_size = 0;
731 sljit_s32 word_arg_count;
732
733 CHECK_ERROR_PTR();
734 CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types));
735
736 #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
737 if ((type & 0xff) == SLJIT_CALL) {
738 stack_size = c_fast_call_get_stack_size(arg_types, &word_arg_count);
739 PTR_FAIL_IF(c_fast_call_with_args(compiler, arg_types, stack_size, word_arg_count, 0));
740
741 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
742 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
743 compiler->skip_checks = 1;
744 #endif
745
746 jump = sljit_emit_jump(compiler, type);
747 PTR_FAIL_IF(jump == NULL);
748
749 PTR_FAIL_IF(post_call_with_args(compiler, arg_types, 0));
750 return jump;
751 }
752 #endif
753
754 stack_size = cdecl_call_get_stack_size(compiler, arg_types, &word_arg_count);
755 PTR_FAIL_IF(cdecl_call_with_args(compiler, arg_types, stack_size, word_arg_count));
756
757 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
758 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
759 compiler->skip_checks = 1;
760 #endif
761
762 jump = sljit_emit_jump(compiler, type);
763 PTR_FAIL_IF(jump == NULL);
764
765 PTR_FAIL_IF(post_call_with_args(compiler, arg_types, stack_size));
766 return jump;
767 }
768
769 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type,
770 sljit_s32 arg_types,
771 sljit_s32 src, sljit_sw srcw)
772 {
773 sljit_s32 stack_size = 0;
774 sljit_s32 word_arg_count;
775 #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
776 sljit_s32 swap_args;
777 #endif
778
779 CHECK_ERROR();
780 CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw));
781
782 #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
783 SLJIT_ASSERT(reg_map[SLJIT_R0] == 0 && reg_map[SLJIT_R2] == 1 && SLJIT_R0 == 1 && SLJIT_R2 == 3);
784
785 if ((type & 0xff) == SLJIT_CALL) {
786 stack_size = c_fast_call_get_stack_size(arg_types, &word_arg_count);
787 swap_args = 0;
788
789 if (word_arg_count > 0) {
790 if ((src & REG_MASK) == SLJIT_R2 || OFFS_REG(src) == SLJIT_R2) {
791 swap_args = 1;
792 if (((src & REG_MASK) | 0x2) == SLJIT_R2)
793 src ^= 0x2;
794 if ((OFFS_REG(src) | 0x2) == SLJIT_R2)
795 src ^= TO_OFFS_REG(0x2);
796 }
797 }
798
799 FAIL_IF(c_fast_call_with_args(compiler, arg_types, stack_size, word_arg_count, swap_args));
800
801 compiler->saveds_offset += stack_size;
802 compiler->locals_offset += stack_size;
803
804 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
805 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
806 compiler->skip_checks = 1;
807 #endif
808 FAIL_IF(sljit_emit_ijump(compiler, type, src, srcw));
809
810 compiler->saveds_offset -= stack_size;
811 compiler->locals_offset -= stack_size;
812
813 return post_call_with_args(compiler, arg_types, 0);
814 }
815 #endif
816
817 stack_size = cdecl_call_get_stack_size(compiler, arg_types, &word_arg_count);
818 FAIL_IF(cdecl_call_with_args(compiler, arg_types, stack_size, word_arg_count));
819
820 compiler->saveds_offset += stack_size;
821 compiler->locals_offset += stack_size;
822
823 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
824 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
825 compiler->skip_checks = 1;
826 #endif
827 FAIL_IF(sljit_emit_ijump(compiler, type, src, srcw));
828
829 compiler->saveds_offset -= stack_size;
830 compiler->locals_offset -= stack_size;
831
832 return post_call_with_args(compiler, arg_types, stack_size);
833 }
834
835 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw)
836 {
837 sljit_u8 *inst;
838
839 CHECK_ERROR();
840 CHECK(check_sljit_emit_fast_enter(compiler, dst, dstw));
841 ADJUST_LOCAL_OFFSET(dst, dstw);
842
843 CHECK_EXTRA_REGS(dst, dstw, (void)0);
844
845 /* For UNUSED dst. Uncommon, but possible. */
846 if (dst == SLJIT_UNUSED)
847 dst = TMP_REG1;
848
849 if (FAST_IS_REG(dst)) {
850 /* Unused dest is possible here. */
851 inst = (sljit_u8*)ensure_buf(compiler, 1 + 1);
852 FAIL_IF(!inst);
853
854 INC_SIZE(1);
855 POP_REG(reg_map[dst]);
856 return SLJIT_SUCCESS;
857 }
858
859 /* Memory. */
860 inst = emit_x86_instruction(compiler, 1, 0, 0, dst, dstw);
861 FAIL_IF(!inst);
862 *inst++ = POP_rm;
863 return SLJIT_SUCCESS;
864 }
865
866 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_return(struct sljit_compiler *compiler, sljit_s32 src, sljit_sw srcw)
867 {
868 sljit_u8 *inst;
869
870 CHECK_ERROR();
871 CHECK(check_sljit_emit_fast_return(compiler, src, srcw));
872 ADJUST_LOCAL_OFFSET(src, srcw);
873
874 CHECK_EXTRA_REGS(src, srcw, (void)0);
875
876 if (FAST_IS_REG(src)) {
877 inst = (sljit_u8*)ensure_buf(compiler, 1 + 1 + 1);
878 FAIL_IF(!inst);
879
880 INC_SIZE(1 + 1);
881 PUSH_REG(reg_map[src]);
882 }
883 else {
884 inst = emit_x86_instruction(compiler, 1, 0, 0, src, srcw);
885 FAIL_IF(!inst);
886 *inst++ = GROUP_FF;
887 *inst |= PUSH_rm;
888
889 inst = (sljit_u8*)ensure_buf(compiler, 1 + 1);
890 FAIL_IF(!inst);
891 INC_SIZE(1);
892 }
893
894 RET();
895 return SLJIT_SUCCESS;
896 }

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