/[pcre]/code/trunk/sljit/sljitLir.h
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Contents of /code/trunk/sljit/sljitLir.h

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Revision 835 - (show annotations) (download)
Wed Dec 28 16:10:09 2011 UTC (2 years, 6 months ago) by ph10
File MIME type: text/plain
File size: 29970 byte(s)
Rolled back trunk to r755 to prepare for merging the 16-bit branch.

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 #ifndef _SLJIT_LIR_H_
28 #define _SLJIT_LIR_H_
29
30 /*
31 ------------------------------------------------------------------------
32 Stack-Less JIT compiler for multiple architectures (x86, ARM, PowerPC)
33 ------------------------------------------------------------------------
34
35 Short description
36 Advantages:
37 - The execution can be continued from any LIR instruction
38 In other words, jump into and out of the code is safe
39 - Both target of (conditional) jump and call instructions
40 and constants can be dynamically modified during runtime
41 - although it is not suggested to do it frequently
42 - very effective to cache an important value once
43 - A fixed stack space can be allocated for local variables
44 - The compiler is thread-safe
45 Disadvantages:
46 - Limited number of registers (only 6+4 integer registers, max 3+2
47 temporary and max 3+2 general, and 4 floating point registers)
48 In practice:
49 - This approach is very effective for interpreters
50 - One of the general registers typically points to a stack interface
51 - It can jump to any exception handler anytime (even for another
52 function. It is safe for SLJIT.)
53 - Fast paths can be modified during runtime reflecting the changes
54 of the fastest execution path of the dynamic language
55 - SLJIT supports complex memory addressing modes
56 - mainly position independent code
57 - Optimizations (perhaps later)
58 - Only for basic blocks (when no labels inserted between LIR instructions)
59
60 For valgrind users:
61 - pass --smc-check=all argument to valgrind, since JIT is a "self-modifying code"
62 */
63
64 #if !(defined SLJIT_NO_DEFAULT_CONFIG && SLJIT_NO_DEFAULT_CONFIG)
65 #include "sljitConfig.h"
66 #endif
67 #include "sljitConfigInternal.h"
68
69 /* --------------------------------------------------------------------- */
70 /* Error codes */
71 /* --------------------------------------------------------------------- */
72
73 /* Indicates no error. */
74 #define SLJIT_SUCCESS 0
75 /* After the call of sljit_generate_code(), the error code of the compiler
76 is set to this value to avoid future sljit calls (in debug mode at least).
77 The complier should be freed after sljit_generate_code(). */
78 #define SLJIT_ERR_COMPILED 1
79 /* Cannot allocate non executable memory. */
80 #define SLJIT_ERR_ALLOC_FAILED 2
81 /* Cannot allocate executable memory.
82 Only for sljit_generate_code() */
83 #define SLJIT_ERR_EX_ALLOC_FAILED 3
84 /* return value for SLJIT_CONFIG_UNSUPPORTED empty architecture. */
85 #define SLJIT_ERR_UNSUPPORTED 4
86
87 /* --------------------------------------------------------------------- */
88 /* Registers */
89 /* --------------------------------------------------------------------- */
90
91 #define SLJIT_UNUSED 0
92
93 /* Temporary (scratch) registers may not preserve their values across function calls. */
94 #define SLJIT_TEMPORARY_REG1 1
95 #define SLJIT_TEMPORARY_REG2 2
96 #define SLJIT_TEMPORARY_REG3 3
97 /* Note: Extra Registers cannot be used for memory addressing. */
98 /* Note: on x86-32, these registers are emulated (using stack loads & stores). */
99 #define SLJIT_TEMPORARY_EREG1 4
100 #define SLJIT_TEMPORARY_EREG2 5
101
102 /* General (saved) registers preserve their values across function calls. */
103 #define SLJIT_GENERAL_REG1 6
104 #define SLJIT_GENERAL_REG2 7
105 #define SLJIT_GENERAL_REG3 8
106 /* Note: Extra Registers cannot be used for memory addressing. */
107 /* Note: on x86-32, these registers are emulated (using stack loads & stores). */
108 #define SLJIT_GENERAL_EREG1 9
109 #define SLJIT_GENERAL_EREG2 10
110
111 /* Read-only register (cannot be the destination of an operation). */
112 /* Note: SLJIT_MEM2( ... , SLJIT_LOCALS_REG) is not supported (x86 limitation). */
113 /* Note: SLJIT_LOCALS_REG is not necessary the real stack pointer. See sljit_emit_enter. */
114 #define SLJIT_LOCALS_REG 11
115
116 /* Number of registers. */
117 #define SLJIT_NO_TMP_REGISTERS 5
118 #define SLJIT_NO_GEN_REGISTERS 5
119 #define SLJIT_NO_REGISTERS 11
120
121 /* Return with machine word. */
122
123 #define SLJIT_RETURN_REG SLJIT_TEMPORARY_REG1
124
125 /* x86 prefers temporary registers for special purposes. If other
126 registers are used such purpose, it costs a little performance
127 drawback. It doesn't matter for other archs. */
128
129 #define SLJIT_PREF_SHIFT_REG SLJIT_TEMPORARY_REG3
130
131 /* --------------------------------------------------------------------- */
132 /* Floating point registers */
133 /* --------------------------------------------------------------------- */
134
135 /* Note: SLJIT_UNUSED as destination is not valid for floating point
136 operations, since they cannot be used for setting flags. */
137
138 /* Floating point operations are performed on double precision values. */
139
140 #define SLJIT_FLOAT_REG1 1
141 #define SLJIT_FLOAT_REG2 2
142 #define SLJIT_FLOAT_REG3 3
143 #define SLJIT_FLOAT_REG4 4
144
145 /* --------------------------------------------------------------------- */
146 /* Main structures and functions */
147 /* --------------------------------------------------------------------- */
148
149 struct sljit_memory_fragment {
150 struct sljit_memory_fragment *next;
151 sljit_uw used_size;
152 sljit_ub memory[1];
153 };
154
155 struct sljit_label {
156 struct sljit_label *next;
157 sljit_uw addr;
158 /* The maximum size difference. */
159 sljit_uw size;
160 };
161
162 struct sljit_jump {
163 struct sljit_jump *next;
164 sljit_uw addr;
165 sljit_w flags;
166 union {
167 sljit_uw target;
168 struct sljit_label* label;
169 } u;
170 };
171
172 struct sljit_const {
173 struct sljit_const *next;
174 sljit_uw addr;
175 };
176
177 struct sljit_compiler {
178 int error;
179
180 struct sljit_label *labels;
181 struct sljit_jump *jumps;
182 struct sljit_const *consts;
183 struct sljit_label *last_label;
184 struct sljit_jump *last_jump;
185 struct sljit_const *last_const;
186
187 struct sljit_memory_fragment *buf;
188 struct sljit_memory_fragment *abuf;
189
190 /* Used local registers. */
191 int temporaries;
192 /* Used general registers. */
193 int generals;
194 /* Local stack size. */
195 int local_size;
196 /* Code size. */
197 sljit_uw size;
198
199 #if (defined SLJIT_CONFIG_X86_32 && SLJIT_CONFIG_X86_32)
200 int args;
201 int temporaries_start;
202 int generals_start;
203 #endif
204
205 #if (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64)
206 int mode32;
207 #ifdef _WIN64
208 int has_locals;
209 #endif
210 #endif
211
212 #if (defined SLJIT_CONFIG_X86_32 && SLJIT_CONFIG_X86_32) || (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64)
213 int flags_saved;
214 #endif
215
216 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
217 /* Constant pool handling. */
218 sljit_uw *cpool;
219 sljit_ub *cpool_unique;
220 sljit_uw cpool_diff;
221 sljit_uw cpool_fill;
222 /* General fields. */
223 /* Contains pointer, "ldr pc, [...]" pairs. */
224 sljit_uw patches;
225 #endif
226
227 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5) || (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
228 /* Temporary fields. */
229 sljit_uw shift_imm;
230 int cache_arg;
231 sljit_w cache_argw;
232 #endif
233
234 #if (defined SLJIT_CONFIG_ARM_THUMB2 && SLJIT_CONFIG_ARM_THUMB2)
235 int cache_arg;
236 sljit_w cache_argw;
237 #endif
238
239 #if (defined SLJIT_CONFIG_PPC_32 && SLJIT_CONFIG_PPC_32) || (defined SLJIT_CONFIG_PPC_64 && SLJIT_CONFIG_PPC_64)
240 int has_locals;
241 sljit_w imm;
242 int cache_arg;
243 sljit_w cache_argw;
244 #endif
245
246 #if (defined SLJIT_CONFIG_MIPS_32 && SLJIT_CONFIG_MIPS_32)
247 int has_locals;
248 int delay_slot;
249 int cache_arg;
250 sljit_w cache_argw;
251 #endif
252
253 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE)
254 FILE* verbose;
255 #endif
256
257 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) || (defined SLJIT_DEBUG && SLJIT_DEBUG)
258 int skip_checks;
259 #endif
260 };
261
262 /* --------------------------------------------------------------------- */
263 /* Main functions */
264 /* --------------------------------------------------------------------- */
265
266 /* Creates an sljit compiler.
267 Returns NULL if failed. */
268 SLJIT_API_FUNC_ATTRIBUTE struct sljit_compiler* sljit_create_compiler(void);
269 /* Free everything except the codes. */
270 SLJIT_API_FUNC_ATTRIBUTE void sljit_free_compiler(struct sljit_compiler *compiler);
271
272 static SLJIT_INLINE int sljit_get_compiler_error(struct sljit_compiler *compiler) { return compiler->error; }
273
274 /*
275 Allocate a small amount of memory. The size must be <= 64 bytes on 32 bit,
276 and <= 128 bytes on 64 bit architectures. The memory area is owned by the compiler,
277 and freed by sljit_free_compiler. The returned pointer is sizeof(sljit_w) aligned.
278 Excellent for allocating small blocks during the compiling, and no need to worry
279 about freeing them. The size is enough to contain at most 16 pointers.
280 If the size is outside of the range, the function will return with NULL,
281 but this return value does not indicate that there is no more memory (does
282 not set the compiler to out-of-memory status).
283 */
284 SLJIT_API_FUNC_ATTRIBUTE void* sljit_alloc_memory(struct sljit_compiler *compiler, int size);
285
286 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE)
287 /* Passing NULL disables verbose. */
288 SLJIT_API_FUNC_ATTRIBUTE void sljit_compiler_verbose(struct sljit_compiler *compiler, FILE* verbose);
289 #endif
290
291 SLJIT_API_FUNC_ATTRIBUTE void* sljit_generate_code(struct sljit_compiler *compiler);
292 SLJIT_API_FUNC_ATTRIBUTE void sljit_free_code(void* code);
293
294 /* Instruction generation. Returns with error code. */
295
296 /*
297 Entry instruction. The instruction has "args" number of arguments
298 and will use the first "general" number of general registers.
299 The arguments are passed into the general registers (arg1 to general_reg1, and so on).
300 Thus, "args" must be less or equal than "general". A local_size extra
301 stack space is allocated for the jit code (must be less or equal than
302 SLJIT_MAX_LOCAL_SIZE), which can accessed through SLJIT_LOCALS_REG (see
303 the notes there). SLJIT_LOCALS_REG is not necessary the real stack pointer!
304 It just points somewhere in the stack if local_size > 0 (!). Thus, the only
305 thing which is known that the memory area between SLJIT_LOCALS_REG and
306 SLJIT_LOCALS_REG + local_size is a valid stack area if local_size > 0
307 */
308
309 /* Note: multiple calls of this function overwrites the previous call. */
310
311 #define SLJIT_MAX_LOCAL_SIZE 65536
312
313 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size);
314
315 /* Since sljit_emit_return (and many asserts) uses variables which are initialized
316 by sljit_emit_enter, a simple return is not possible if these variables are not
317 initialized. sljit_fake_enter does not emit any instruction, just initialize
318 those variables. */
319
320 /* Note: multiple calls of this function overwrites the previous call. */
321
322 SLJIT_API_FUNC_ATTRIBUTE void sljit_fake_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size);
323
324 /* Return from jit. See below the possible values for src and srcw. */
325 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_return(struct sljit_compiler *compiler, int src, sljit_w srcw);
326
327 /* Really fast calling method for utility functions inside sljit (see SLJIT_FAST_CALL).
328 All registers and even the stack frame is passed to the callee. The return address is
329 preserved in dst/dstw by sljit_emit_fast_enter, and sljit_emit_fast_return can
330 use this as a return value later. */
331
332 /* Note: only for sljit specific, non ABI compilant calls. Fast, since only a few machine instructions
333 are needed. Excellent for small uility functions, where saving general registers and setting up
334 a new stack frame would cost too much performance. However, it is still possible to return
335 to the address of the caller (or anywhere else). */
336
337 /* Note: flags are not changed (unlike sljit_emit_enter / sljit_emit_return). */
338
339 /* Note: although sljit_emit_fast_return could be replaced by an ijump, it is not suggested,
340 since many architectures do clever branch prediction on call / return instruction pairs. */
341
342 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_enter(struct sljit_compiler *compiler, int dst, sljit_w dstw, int args, int temporaries, int generals, int local_size);
343 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_return(struct sljit_compiler *compiler, int src, sljit_w srcw);
344
345 /*
346 Source and destination values for arithmetical instructions
347 imm - a simple immediate value (cannot be used as a destination)
348 reg - any of the registers (immediate argument must be 0)
349 [imm] - absolute immediate memory address
350 [reg+imm] - indirect memory address
351 [reg+(reg<<imm)] - indirect indexed memory address (shift must be between 0 and 3)
352 useful for (byte, half, int, sljit_w) array access
353 (fully supported by both x86 and ARM architectures, and cheap operation on others)
354 */
355
356 /*
357 IMPORATNT NOTE: memory access MUST be naturally aligned.
358 length | alignment
359 ---------+-----------
360 byte | 1 byte (not aligned)
361 half | 2 byte (real_address & 0x1 == 0)
362 int | 4 byte (real_address & 0x3 == 0)
363 sljit_w | 4 byte if SLJIT_32BIT_ARCHITECTURE defined
364 | 8 byte if SLJIT_64BIT_ARCHITECTURE defined
365 (This is a strict requirement for embedded systems.)
366
367 Note: different architectures have different addressing limitations
368 Thus sljit may generate several instructions for other addressing modes
369 x86: all addressing modes supported, but write-back is not supported
370 (requires an extra instruction). On x86-64 only 32 bit signed
371 integers are supported by the architecture.
372 arm: [reg+imm] supported for small immediates (-4095 <= imm <= 4095
373 or -255 <= imm <= 255 for loading signed bytes, any halfs or doubles)
374 [reg+(reg<<imm)] are supported or requires only two instructions
375 Write back is limited to small immediates on thumb2
376 ppc: [reg+imm], -65535 <= imm <= 65535. 64 bit moves requires immediates
377 divisible by 4. [reg+reg] supported, write-back supported
378 [reg+(reg<<imm)] (imm != 0) is cheap (requires two instructions)
379 */
380
381 /* Register output: simply the name of the register.
382 For destination, you can use SLJIT_UNUSED as well. */
383 #define SLJIT_MEM 0x100
384 #define SLJIT_MEM0() (SLJIT_MEM)
385 #define SLJIT_MEM1(r1) (SLJIT_MEM | (r1))
386 #define SLJIT_MEM2(r1, r2) (SLJIT_MEM | (r1) | ((r2) << 4))
387 #define SLJIT_IMM 0x200
388
389 /* Set 32 bit operation mode (I) on 64 bit CPUs. The flag is totally ignored on
390 32 bit CPUs. The arithmetic instruction uses only the lower 32 bit of the
391 input register(s), and set the flags according to the 32 bit result. If the
392 destination is a register, the higher 32 bit of the result is undefined.
393 The addressing modes (SLJIT_MEM1/SLJIT_MEM2 macros) are unaffected by this flag. */
394 #define SLJIT_INT_OP 0x100
395
396 /* Common CPU status flags for all architectures (x86, ARM, PPC)
397 - carry flag
398 - overflow flag
399 - zero flag
400 - negative/positive flag (depends on arc)
401 On mips, these flags are emulated by software. */
402
403 /* By default, the instructions may, or may not set the CPU status flags.
404 Forcing to set or keep status flags can be done with the following flags: */
405
406 /* Note: sljit tries to emit the minimum number of instructions. Using these
407 flags can increase them, so use them wisely to avoid unnecessary code generation. */
408
409 /* Set Equal (Zero) status flag (E). */
410 #define SLJIT_SET_E 0x0200
411 /* Set signed status flag (S). */
412 #define SLJIT_SET_S 0x0400
413 /* Set unsgined status flag (U). */
414 #define SLJIT_SET_U 0x0800
415 /* Set signed overflow flag (O). */
416 #define SLJIT_SET_O 0x1000
417 /* Set carry flag (C).
418 Note: Kinda unsigned overflow, but behaves differently on various cpus. */
419 #define SLJIT_SET_C 0x2000
420 /* Do not modify the flags (K).
421 Note: This flag cannot be combined with any other SLJIT_SET_* flag. */
422 #define SLJIT_KEEP_FLAGS 0x4000
423
424 /* Notes:
425 - you cannot postpone conditional jump instructions except if noted that
426 the instruction does not set flags (See: SLJIT_KEEP_FLAGS).
427 - flag combinations: '|' means 'logical or'. */
428
429 /* Flags: - (never set any flags)
430 Note: breakpoint instruction is not supported by all architectures (namely ppc)
431 It falls back to SLJIT_NOP in those cases. */
432 #define SLJIT_BREAKPOINT 0
433 /* Flags: - (never set any flags)
434 Note: may or may not cause an extra cycle wait
435 it can even decrease the runtime in a few cases. */
436 #define SLJIT_NOP 1
437
438 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op0(struct sljit_compiler *compiler, int op);
439
440 /* Notes for MOV instructions:
441 U = Mov with update (post form). If source or destination defined as SLJIT_MEM1(r1)
442 or SLJIT_MEM2(r1, r2), r1 is increased by the sum of r2 and the constant argument
443 UB = unsigned byte (8 bit)
444 SB = signed byte (8 bit)
445 UH = unsgined half (16 bit)
446 SH = unsgined half (16 bit) */
447
448 /* Flags: - (never set any flags) */
449 #define SLJIT_MOV 2
450 /* Flags: - (never set any flags) */
451 #define SLJIT_MOV_UB 3
452 /* Flags: - (never set any flags) */
453 #define SLJIT_MOV_SB 4
454 /* Flags: - (never set any flags) */
455 #define SLJIT_MOV_UH 5
456 /* Flags: - (never set any flags) */
457 #define SLJIT_MOV_SH 6
458 /* Flags: - (never set any flags) */
459 #define SLJIT_MOV_UI 7
460 /* Flags: - (never set any flags) */
461 #define SLJIT_MOV_SI 8
462 /* Flags: - (never set any flags) */
463 #define SLJIT_MOVU 9
464 /* Flags: - (never set any flags) */
465 #define SLJIT_MOVU_UB 10
466 /* Flags: - (never set any flags) */
467 #define SLJIT_MOVU_SB 11
468 /* Flags: - (never set any flags) */
469 #define SLJIT_MOVU_UH 12
470 /* Flags: - (never set any flags) */
471 #define SLJIT_MOVU_SH 13
472 /* Flags: - (never set any flags) */
473 #define SLJIT_MOVU_UI 14
474 /* Flags: - (never set any flags) */
475 #define SLJIT_MOVU_SI 15
476 /* Flags: I | E | K */
477 #define SLJIT_NOT 16
478 /* Flags: I | E | O | K */
479 #define SLJIT_NEG 17
480 /* Count leading zeroes
481 Flags: I | E | K */
482 #define SLJIT_CLZ 18
483
484 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op1(struct sljit_compiler *compiler, int op,
485 int dst, sljit_w dstw,
486 int src, sljit_w srcw);
487
488 /* Flags: I | E | O | C | K */
489 #define SLJIT_ADD 19
490 /* Flags: I | C | K */
491 #define SLJIT_ADDC 20
492 /* Flags: I | E | S | U | O | C | K */
493 #define SLJIT_SUB 21
494 /* Flags: I | C | K */
495 #define SLJIT_SUBC 22
496 /* Note: integer mul */
497 /* Flags: I | O (see SLJIT_C_MUL_*) | K */
498 #define SLJIT_MUL 23
499 /* Flags: I | E | K */
500 #define SLJIT_AND 24
501 /* Flags: I | E | K */
502 #define SLJIT_OR 25
503 /* Flags: I | E | K */
504 #define SLJIT_XOR 26
505 /* Flags: I | E | K */
506 #define SLJIT_SHL 27
507 /* Flags: I | E | K */
508 #define SLJIT_LSHR 28
509 /* Flags: I | E | K */
510 #define SLJIT_ASHR 29
511
512 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op2(struct sljit_compiler *compiler, int op,
513 int dst, sljit_w dstw,
514 int src1, sljit_w src1w,
515 int src2, sljit_w src2w);
516
517 SLJIT_API_FUNC_ATTRIBUTE int sljit_is_fpu_available(void);
518
519 /* Note: dst is the left and src is the right operand for SLJIT_FCMP.
520 Note: NaN check is always performed. If SLJIT_C_FLOAT_NAN is set,
521 the comparison result is unpredictable.
522 Flags: E | S (see SLJIT_C_FLOAT_*) */
523 #define SLJIT_FCMP 30
524 /* Flags: - (never set any flags) */
525 #define SLJIT_FMOV 31
526 /* Flags: - (never set any flags) */
527 #define SLJIT_FNEG 32
528 /* Flags: - (never set any flags) */
529 #define SLJIT_FABS 33
530
531 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fop1(struct sljit_compiler *compiler, int op,
532 int dst, sljit_w dstw,
533 int src, sljit_w srcw);
534
535 /* Flags: - (never set any flags) */
536 #define SLJIT_FADD 34
537 /* Flags: - (never set any flags) */
538 #define SLJIT_FSUB 35
539 /* Flags: - (never set any flags) */
540 #define SLJIT_FMUL 36
541 /* Flags: - (never set any flags) */
542 #define SLJIT_FDIV 37
543
544 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fop2(struct sljit_compiler *compiler, int op,
545 int dst, sljit_w dstw,
546 int src1, sljit_w src1w,
547 int src2, sljit_w src2w);
548
549 /* Label and jump instructions. */
550
551 SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler);
552
553 /* Invert conditional instruction: xor (^) with 0x1 */
554 #define SLJIT_C_EQUAL 0
555 #define SLJIT_C_ZERO 0
556 #define SLJIT_C_NOT_EQUAL 1
557 #define SLJIT_C_NOT_ZERO 1
558
559 #define SLJIT_C_LESS 2
560 #define SLJIT_C_GREATER_EQUAL 3
561 #define SLJIT_C_GREATER 4
562 #define SLJIT_C_LESS_EQUAL 5
563 #define SLJIT_C_SIG_LESS 6
564 #define SLJIT_C_SIG_GREATER_EQUAL 7
565 #define SLJIT_C_SIG_GREATER 8
566 #define SLJIT_C_SIG_LESS_EQUAL 9
567
568 #define SLJIT_C_OVERFLOW 10
569 #define SLJIT_C_NOT_OVERFLOW 11
570
571 #define SLJIT_C_MUL_OVERFLOW 12
572 #define SLJIT_C_MUL_NOT_OVERFLOW 13
573
574 #define SLJIT_C_FLOAT_EQUAL 14
575 #define SLJIT_C_FLOAT_NOT_EQUAL 15
576 #define SLJIT_C_FLOAT_LESS 16
577 #define SLJIT_C_FLOAT_GREATER_EQUAL 17
578 #define SLJIT_C_FLOAT_GREATER 18
579 #define SLJIT_C_FLOAT_LESS_EQUAL 19
580 #define SLJIT_C_FLOAT_NAN 20
581 #define SLJIT_C_FLOAT_NOT_NAN 21
582
583 #define SLJIT_JUMP 22
584 #define SLJIT_FAST_CALL 23
585 #define SLJIT_CALL0 24
586 #define SLJIT_CALL1 25
587 #define SLJIT_CALL2 26
588 #define SLJIT_CALL3 27
589
590 /* Fast calling method. See sljit_emit_fast_enter / sljit_emit_fast_return. */
591
592 /* The target can be changed during runtime (see: sljit_set_jump_addr). */
593 #define SLJIT_REWRITABLE_JUMP 0x1000
594
595 /* Emit a jump instruction. The destination is not set, only the type of the jump.
596 type must be between SLJIT_C_EQUAL and SLJIT_CALL3
597 type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP
598 Flags: - (never set any flags) for both conditional and unconditional jumps.
599 Flags: destroy all flags for calls. */
600 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, int type);
601
602 /* Basic arithmetic comparison. In most architectures it is equal to
603 an SLJIT_SUB operation (with SLJIT_UNUSED destination) followed by a
604 sljit_emit_jump. However some architectures (i.e: MIPS) may employ
605 special optimizations here. It is suggested to use this comparison
606 form when flags are unimportant.
607 type must be between SLJIT_C_EQUAL and SLJIT_C_SIG_LESS_EQUAL
608 type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP or SLJIT_INT_OP
609 Flags: destroy flags. */
610 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_cmp(struct sljit_compiler *compiler, int type,
611 int src1, sljit_w src1w,
612 int src2, sljit_w src2w);
613
614 /* Set the destination of the jump to this label. */
615 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_label(struct sljit_jump *jump, struct sljit_label* label);
616 /* Only for jumps defined with SLJIT_REWRITABLE_JUMP flag.
617 Note: use sljit_emit_ijump for fixed jumps. */
618 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_target(struct sljit_jump *jump, sljit_uw target);
619
620 /* Call function or jump anywhere. Both direct and indirect form
621 type must be between SLJIT_JUMP and SLJIT_CALL3
622 Direct form: set src to SLJIT_IMM() and srcw to the address
623 Indirect form: any other valid addressing mode
624 Flags: - (never set any flags) for unconditional jumps.
625 Flags: destroy all flags for calls. */
626 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_ijump(struct sljit_compiler *compiler, int type, int src, sljit_w srcw);
627
628 /* If op == SLJIT_MOV:
629 Set dst to 1 if condition is fulfilled, 0 otherwise
630 type must be between SLJIT_C_EQUAL and SLJIT_C_FLOAT_NOT_NAN
631 Flags: - (never set any flags)
632 If op == SLJIT_OR
633 Dst is used as src as well, and set its lowest bit to 1 if
634 the condition is fulfilled. Otherwise it does nothing.
635 Flags: E | K
636 Note: sljit_emit_cond_value does nothing, if dst is SLJIT_UNUSED (regardless of op). */
637 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_cond_value(struct sljit_compiler *compiler, int op, int dst, sljit_w dstw, int type);
638
639 /* The constant can be changed runtime (see: sljit_set_const)
640 Flags: - (never set any flags) */
641 SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, int dst, sljit_w dstw, sljit_w init_value);
642
643 /* After the code generation the address for label, jump and const instructions
644 are computed. Since these structures are freed sljit_free_compiler, the
645 addresses must be preserved by the user program elsewere. */
646 static SLJIT_INLINE sljit_uw sljit_get_label_addr(struct sljit_label *label) { return label->addr; }
647 static SLJIT_INLINE sljit_uw sljit_get_jump_addr(struct sljit_jump *jump) { return jump->addr; }
648 static SLJIT_INLINE sljit_uw sljit_get_const_addr(struct sljit_const *const_) { return const_->addr; }
649
650 /* Only the address is required to rewrite the code. */
651 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr);
652 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_w new_constant);
653
654 /* --------------------------------------------------------------------- */
655 /* Miscellaneous utility functions */
656 /* --------------------------------------------------------------------- */
657
658 #define SLJIT_MAJOR_VERSION 0
659 #define SLJIT_MINOR_VERSION 82
660
661 /* Get the human readable name of the platfrom.
662 Can be useful for debugging on platforms like ARM, where ARM and
663 Thumb2 functions can be mixed. */
664 SLJIT_API_FUNC_ATTRIBUTE SLJIT_CONST char* sljit_get_platform_name(void);
665
666 /* Portble helper function to get an offset of a member. */
667 #define SLJIT_OFFSETOF(base, member) ((sljit_w)(&((base*)0x10)->member) - 0x10)
668
669 #if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK)
670 /* This global lock is useful to compile common functions. */
671 SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void);
672 SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void);
673 #endif
674
675 #if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK)
676
677 /* The sljit_stack is a utiliy feature of sljit, which allocates a
678 writable memory region between base (inclusive) and limit (exclusive).
679 Both base and limit is a pointer, and base is always <= than limit.
680 This feature uses the "address space reserve" feature
681 of modern operating systems. Basically we don't need to allocate a
682 huge memory block in one step for the worst case, we can start with
683 a smaller chunk and extend it later. Since the address space is
684 reserved, the data never copied to other regions, thus it is safe
685 to store pointers here. */
686
687 /* Note: The base field is aligned to PAGE_SIZE bytes (usually 4k or more).
688 Note: stack growing should not happen in small steps: 4k, 16k or even
689 bigger growth is better.
690 Note: this structure may not be supported by all operating systems.
691 Some kind of fallback mechanism is suggested when SLJIT_UTIL_STACK
692 is not defined. */
693
694 struct sljit_stack {
695 /* User data, anything can be stored here.
696 Starting with the same value as base. */
697 sljit_uw top;
698 /* These members are read only. */
699 sljit_uw base;
700 sljit_uw limit;
701 sljit_uw max_limit;
702 };
703
704 /* Returns NULL if unsuccessful.
705 Note: limit and max_limit contains the size for stack allocation
706 Note: the top field is initialized to base. */
707 SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(sljit_uw limit, sljit_uw max_limit);
708 SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_free_stack(struct sljit_stack* stack);
709
710 /* Can be used to increase (allocate) or decrease (free) the memory area.
711 Returns with a non-zero value if unsuccessful. If new_limit is greater than
712 max_limit, it will fail. It is very easy to implement a stack data structure,
713 since the growth ratio can be added to the current limit, and sljit_stack_resize
714 will do all the necessary checks. The fields of the stack are not changed if
715 sljit_stack_resize fails. */
716 SLJIT_API_FUNC_ATTRIBUTE sljit_w SLJIT_CALL sljit_stack_resize(struct sljit_stack* stack, sljit_uw new_limit);
717
718 #endif /* (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) */
719
720 #if !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL)
721
722 /* Get the entry address of a given function. */
723 #define SLJIT_FUNC_OFFSET(func_name) ((sljit_w)func_name)
724
725 #else /* !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) */
726
727 /* All JIT related code should be placed in the same context (library, binary, etc.). */
728
729 #define SLJIT_FUNC_OFFSET(func_name) ((sljit_w)*(void**)func_name)
730
731 /* For powerpc64, the function pointers point to a context descriptor. */
732 struct sljit_function_context {
733 sljit_w addr;
734 sljit_w r2;
735 sljit_w r11;
736 };
737
738 /* Fill the context arguments using the addr and the function.
739 If func_ptr is NULL, it will not be set to the address of context
740 If addr is NULL, the function address also comes from the func pointer. */
741 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_function_context(void** func_ptr, struct sljit_function_context* context, sljit_w addr, void* func);
742
743 #endif /* !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) */
744
745 #endif /* _SLJIT_LIR_H_ */

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