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

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Revision 740 - (show annotations)
Mon Oct 31 06:10:14 2011 UTC (7 years, 10 months ago) by zherczeg
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Updating the JIT compiler
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
61 #if !(defined SLJIT_NO_DEFAULT_CONFIG && SLJIT_NO_DEFAULT_CONFIG)
62 #include "sljitConfig.h"
63 #endif
64 #include "sljitConfigInternal.h"
65
66 /* --------------------------------------------------------------------- */
67 /* Error codes */
68 /* --------------------------------------------------------------------- */
69
70 /* Indicates no error. */
71 #define SLJIT_SUCCESS 0
72 /* After the call of sljit_generate_code(), the error code of the compiler
73 is set to this value to avoid future sljit calls (in debug mode at least).
74 The complier should be freed after sljit_generate_code(). */
75 #define SLJIT_ERR_COMPILED 1
76 /* Cannot allocate non executable memory. */
77 #define SLJIT_ERR_ALLOC_FAILED 2
78 /* Cannot allocate executable memory.
79 Only for sljit_generate_code() */
80 #define SLJIT_ERR_EX_ALLOC_FAILED 3
81 /* return value for SLJIT_CONFIG_UNSUPPORTED empty architecture. */
82 #define SLJIT_ERR_UNSUPPORTED 4
83
84 /* --------------------------------------------------------------------- */
85 /* Registers */
86 /* --------------------------------------------------------------------- */
87
88 #define SLJIT_UNUSED 0
89
90 #define SLJIT_TEMPORARY_REG1 1
91 #define SLJIT_TEMPORARY_REG2 2
92 #define SLJIT_TEMPORARY_REG3 3
93 /* Note: Extra Registers cannot be used for memory addressing. */
94 /* Note: on x86-32, these registers are emulated (using stack loads & stores). */
95 #define SLJIT_TEMPORARY_EREG1 4
96 #define SLJIT_TEMPORARY_EREG2 5
97
98 #define SLJIT_GENERAL_REG1 6
99 #define SLJIT_GENERAL_REG2 7
100 #define SLJIT_GENERAL_REG3 8
101 /* Note: Extra Registers cannot be used for memory addressing. */
102 /* Note: on x86-32, these registers are emulated (using stack loads & stores). */
103 #define SLJIT_GENERAL_EREG1 9
104 #define SLJIT_GENERAL_EREG2 10
105
106 /* Read-only register (cannot be the destination of an operation). */
107 /* Note: SLJIT_MEM2( ... , SLJIT_LOCALS_REG) is not supported (x86 limitation). */
108 /* Note: SLJIT_LOCALS_REG is not necessary the real stack pointer. See sljit_emit_enter. */
109 #define SLJIT_LOCALS_REG 11
110
111 /* Number of registers. */
112 #define SLJIT_NO_TMP_REGISTERS 5
113 #define SLJIT_NO_GEN_REGISTERS 5
114 #define SLJIT_NO_REGISTERS 11
115
116 /* Return with machine word. */
117
118 #define SLJIT_RETURN_REG SLJIT_TEMPORARY_REG1
119
120 /* x86 prefers temporary registers for special purposes. If other
121 registers are used such purpose, it costs a little performance
122 drawback. It doesn't matter for other archs. */
123
124 #define SLJIT_PREF_SHIFT_REG SLJIT_TEMPORARY_REG3
125
126 /* --------------------------------------------------------------------- */
127 /* Floating point registers */
128 /* --------------------------------------------------------------------- */
129
130 /* Note: SLJIT_UNUSED as destination is not valid for floating point
131 operations, since they cannot be used for setting flags. */
132
133 /* Floating point operations are performed on double precision values. */
134
135 #define SLJIT_FLOAT_REG1 1
136 #define SLJIT_FLOAT_REG2 2
137 #define SLJIT_FLOAT_REG3 3
138 #define SLJIT_FLOAT_REG4 4
139
140 /* --------------------------------------------------------------------- */
141 /* Main structures and functions */
142 /* --------------------------------------------------------------------- */
143
144 struct sljit_memory_fragment {
145 struct sljit_memory_fragment *next;
146 sljit_uw used_size;
147 sljit_ub memory[1];
148 };
149
150 struct sljit_label {
151 struct sljit_label *next;
152 sljit_uw addr;
153 /* The maximum size difference. */
154 sljit_uw size;
155 };
156
157 struct sljit_jump {
158 struct sljit_jump *next;
159 sljit_uw addr;
160 sljit_w flags;
161 union {
162 sljit_uw target;
163 struct sljit_label* label;
164 } u;
165 };
166
167 struct sljit_const {
168 struct sljit_const *next;
169 sljit_uw addr;
170 };
171
172 struct sljit_compiler {
173 int error;
174
175 struct sljit_label *labels;
176 struct sljit_jump *jumps;
177 struct sljit_const *consts;
178 struct sljit_label *last_label;
179 struct sljit_jump *last_jump;
180 struct sljit_const *last_const;
181
182 struct sljit_memory_fragment *buf;
183 struct sljit_memory_fragment *abuf;
184
185 /* Used local registers. */
186 int temporaries;
187 /* Used general registers. */
188 int generals;
189 /* Local stack size. */
190 int local_size;
191 /* Code size. */
192 sljit_uw size;
193
194 #if (defined SLJIT_CONFIG_X86_32 && SLJIT_CONFIG_X86_32)
195 int args;
196 int temporaries_start;
197 int generals_start;
198 #endif
199
200 #if (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64)
201 int mode32;
202 #ifdef _WIN64
203 int has_locals;
204 #endif
205 #endif
206
207 #if (defined SLJIT_CONFIG_X86_32 && SLJIT_CONFIG_X86_32) || (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64)
208 int flags_saved;
209 #endif
210
211 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
212 /* Constant pool handling. */
213 sljit_uw *cpool;
214 sljit_ub *cpool_unique;
215 sljit_uw cpool_diff;
216 sljit_uw cpool_fill;
217 /* General fields. */
218 /* Contains pointer, "ldr pc, [...]" pairs. */
219 sljit_uw patches;
220 #endif
221
222 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5) || (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
223 /* Temporary fields. */
224 sljit_uw shift_imm;
225 int cache_arg;
226 sljit_w cache_argw;
227 #endif
228
229 #if (defined SLJIT_CONFIG_ARM_THUMB2 && SLJIT_CONFIG_ARM_THUMB2)
230 int cache_arg;
231 sljit_w cache_argw;
232 #endif
233
234 #if (defined SLJIT_CONFIG_PPC_32 && SLJIT_CONFIG_PPC_32) || (defined SLJIT_CONFIG_PPC_64 && SLJIT_CONFIG_PPC_64)
235 int has_locals;
236 sljit_w imm;
237 int cache_arg;
238 sljit_w cache_argw;
239 #endif
240
241 #if (defined SLJIT_CONFIG_MIPS_32 && SLJIT_CONFIG_MIPS_32)
242 int has_locals;
243 int delay_slot;
244 int cache_arg;
245 sljit_w cache_argw;
246 #endif
247
248 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE)
249 FILE* verbose;
250 #endif
251
252 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) || (defined SLJIT_DEBUG && SLJIT_DEBUG)
253 int skip_checks;
254 #endif
255 };
256
257 /* --------------------------------------------------------------------- */
258 /* Main functions */
259 /* --------------------------------------------------------------------- */
260
261 /* Creates an sljit compiler.
262 Returns NULL if failed. */
263 SLJIT_API_FUNC_ATTRIBUTE struct sljit_compiler* sljit_create_compiler(void);
264 /* Free everything except the codes. */
265 SLJIT_API_FUNC_ATTRIBUTE void sljit_free_compiler(struct sljit_compiler *compiler);
266
267 static SLJIT_INLINE int sljit_get_compiler_error(struct sljit_compiler *compiler) { return compiler->error; }
268
269 /*
270 Allocate a small amount of memory. The size must be <= 64 bytes on 32 bit,
271 and <= 128 bytes on 64 bit architectures. The memory area is owned by the compiler,
272 and freed by sljit_free_compiler. The returned pointer is sizeof(sljit_w) aligned.
273 Excellent for allocating small blocks during the compiling, and no need to worry
274 about freeing them. The size is enough to contain at most 16 pointers.
275 If the size is outside of the range, the function will return with NULL,
276 but this return value does not indicate that there is no more memory (does
277 not set the compiler to out-of-memory status).
278 */
279 SLJIT_API_FUNC_ATTRIBUTE void* sljit_alloc_memory(struct sljit_compiler *compiler, int size);
280
281 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE)
282 /* Passing NULL disables verbose. */
283 SLJIT_API_FUNC_ATTRIBUTE void sljit_compiler_verbose(struct sljit_compiler *compiler, FILE* verbose);
284 #endif
285
286 SLJIT_API_FUNC_ATTRIBUTE void* sljit_generate_code(struct sljit_compiler *compiler);
287 SLJIT_API_FUNC_ATTRIBUTE void sljit_free_code(void* code);
288
289 /* Instruction generation. Returns with error code. */
290
291 /*
292 Entry instruction. The instruction has "args" number of arguments
293 and will use the first "general" number of general registers.
294 The arguments are passed into the general registers (arg1 to general_reg1, and so on).
295 Thus, "args" must be less or equal than "general". A local_size extra
296 stack space is allocated for the jit code (must be less or equal than
297 SLJIT_MAX_LOCAL_SIZE), which can accessed through SLJIT_LOCALS_REG (see
298 the notes there). SLJIT_LOCALS_REG is not necessary the real stack pointer!
299 It just points somewhere in the stack if local_size > 0 (!). Thus, the only
300 thing which is known that the memory area between SLJIT_LOCALS_REG and
301 SLJIT_LOCALS_REG + local_size is a valid stack area if local_size > 0
302 */
303
304 /* Note: multiple calls of this function overwrites the previous call. */
305
306 #define SLJIT_MAX_LOCAL_SIZE 65536
307
308 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size);
309
310 /* Since sljit_emit_return (and many asserts) uses variables which are initialized
311 by sljit_emit_enter, a simple return is not possible if these variables are not
312 initialized. sljit_fake_enter does not emit any instruction, just initialize
313 those variables. */
314
315 /* Note: multiple calls of this function overwrites the previous call. */
316
317 SLJIT_API_FUNC_ATTRIBUTE void sljit_fake_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size);
318
319 /* Return from jit. See below the possible values for src and srcw. */
320 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_return(struct sljit_compiler *compiler, int src, sljit_w srcw);
321
322 /* Really fast calling method for utility functions inside sljit (see SLJIT_FAST_CALL).
323 All registers and even the stack frame is passed to the callee. The return address is
324 preserved in dst/dstw by sljit_emit_fast_enter, and sljit_emit_fast_return can
325 use this as a return value later. */
326
327 /* Note: only for sljit specific, non ABI compilant calls. Fast, since only a few machine instructions
328 are needed. Excellent for small uility functions, where saving general registers and setting up
329 a new stack frame would cost too much performance. However, it is still possible to return
330 to the address of the caller (or anywhere else). */
331
332 /* Note: flags are not changed (unlike sljit_emit_enter / sljit_emit_return). */
333
334 /* Note: although sljit_emit_fast_return could be replaced by an ijump, it is not suggested,
335 since many architectures do clever branch prediction on call / return instruction pairs. */
336
337 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);
338 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_return(struct sljit_compiler *compiler, int src, sljit_w srcw);
339
340 /*
341 Source and destination values for arithmetical instructions
342 imm - a simple immediate value (cannot be used as a destination)
343 reg - any of the registers (immediate argument must be 0)
344 [imm] - absolute immediate memory address
345 [reg+imm] - indirect memory address
346 [reg+(reg<<imm)] - indirect indexed memory address (shift must be between 0 and 3)
347 useful for (byte, half, int, sljit_w) array access
348 (fully supported by both x86 and ARM architectures, and cheap operation on others)
349 */
350
351 /*
352 IMPORATNT NOTE: memory access MUST be naturally aligned.
353 length | alignment
354 ---------+-----------
355 byte | 1 byte (not aligned)
356 half | 2 byte (real_address & 0x1 == 0)
357 int | 4 byte (real_address & 0x3 == 0)
358 sljit_w | 4 byte if SLJIT_32BIT_ARCHITECTURE defined
359 | 8 byte if SLJIT_64BIT_ARCHITECTURE defined
360 (This is a strict requirement for embedded systems.)
361
362 Note: different architectures have different addressing limitations
363 Thus sljit may generate several instructions for other addressing modes
364 x86: all addressing modes supported, but write-back is not supported
365 (requires an extra instruction). On x86-64 only 32 bit signed
366 integers are supported by the architecture.
367 arm: [reg+imm] supported for small immediates (-4095 <= imm <= 4095
368 or -255 <= imm <= 255 for loading signed bytes, any halfs or doubles)
369 [reg+(reg<<imm)] are supported or requires only two instructions
370 Write back is limited to small immediates on thumb2
371 ppc: [reg+imm], -65535 <= imm <= 65535. 64 bit moves requires immediates
372 divisible by 4. [reg+reg] supported, write-back supported
373 [reg+(reg<<imm)] (imm != 0) is cheap (requires two instructions)
374 */
375
376 /* Register output: simply the name of the register.
377 For destination, you can use SLJIT_UNUSED as well. */
378 #define SLJIT_MEM 0x100
379 #define SLJIT_MEM0() (SLJIT_MEM)
380 #define SLJIT_MEM1(r1) (SLJIT_MEM | (r1))
381 #define SLJIT_MEM2(r1, r2) (SLJIT_MEM | (r1) | ((r2) << 4))
382 #define SLJIT_IMM 0x200
383
384 /* Set 32 bit operation mode (I) on 64 bit CPUs. The flag is totally ignored on
385 32 bit CPUs. The arithmetic instruction uses only the lower 32 bit of the
386 input register(s), and set the flags according to the 32 bit result. If the
387 destination is a register, the higher 32 bit of the result is undefined.
388 The addressing modes (SLJIT_MEM1/SLJIT_MEM2 macros) are unaffected by this flag. */
389 #define SLJIT_INT_OP 0x100
390
391 /* Common CPU status flags for all architectures (x86, ARM, PPC)
392 - carry flag
393 - overflow flag
394 - zero flag
395 - negative/positive flag (depends on arc)
396 On mips, these flags are emulated by software. */
397
398 /* By default, the instructions may, or may not set the CPU status flags.
399 Forcing to set or keep status flags can be done with the following flags: */
400
401 /* Note: sljit tries to emit the minimum number of instructions. Using these
402 flags can increase them, so use them wisely to avoid unnecessary code generation. */
403
404 /* Set Equal (Zero) status flag (E). */
405 #define SLJIT_SET_E 0x0200
406 /* Set signed status flag (S). */
407 #define SLJIT_SET_S 0x0400
408 /* Set unsgined status flag (U). */
409 #define SLJIT_SET_U 0x0800
410 /* Set signed overflow flag (O). */
411 #define SLJIT_SET_O 0x1000
412 /* Set carry flag (C).
413 Note: Kinda unsigned overflow, but behaves differently on various cpus. */
414 #define SLJIT_SET_C 0x2000
415 /* Do not modify the flags (K).
416 Note: This flag cannot be combined with any other SLJIT_SET_* flag. */
417 #define SLJIT_KEEP_FLAGS 0x4000
418
419 /* Notes:
420 - you cannot postpone conditional jump instructions except if noted that
421 the instruction does not set flags (See: SLJIT_KEEP_FLAGS).
422 - flag combinations: '|' means 'logical or'. */
423
424 /* Flags: - (never set any flags)
425 Note: breakpoint instruction is not supported by all architectures (namely ppc)
426 It falls back to SLJIT_NOP in those cases. */
427 #define SLJIT_BREAKPOINT 0
428 /* Flags: - (never set any flags)
429 Note: may or may not cause an extra cycle wait
430 it can even decrease the runtime in a few cases. */
431 #define SLJIT_NOP 1
432
433 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op0(struct sljit_compiler *compiler, int op);
434
435 /* Notes for MOV instructions:
436 U = Mov with update (post form). If source or destination defined as SLJIT_MEM1(r1)
437 or SLJIT_MEM2(r1, r2), r1 is increased by the sum of r2 and the constant argument
438 UB = unsigned byte (8 bit)
439 SB = signed byte (8 bit)
440 UH = unsgined half (16 bit)
441 SH = unsgined half (16 bit) */
442
443 /* Flags: - (never set any flags) */
444 #define SLJIT_MOV 2
445 /* Flags: - (never set any flags) */
446 #define SLJIT_MOV_UB 3
447 /* Flags: - (never set any flags) */
448 #define SLJIT_MOV_SB 4
449 /* Flags: - (never set any flags) */
450 #define SLJIT_MOV_UH 5
451 /* Flags: - (never set any flags) */
452 #define SLJIT_MOV_SH 6
453 /* Flags: - (never set any flags) */
454 #define SLJIT_MOV_UI 7
455 /* Flags: - (never set any flags) */
456 #define SLJIT_MOV_SI 8
457 /* Flags: - (never set any flags) */
458 #define SLJIT_MOVU 9
459 /* Flags: - (never set any flags) */
460 #define SLJIT_MOVU_UB 10
461 /* Flags: - (never set any flags) */
462 #define SLJIT_MOVU_SB 11
463 /* Flags: - (never set any flags) */
464 #define SLJIT_MOVU_UH 12
465 /* Flags: - (never set any flags) */
466 #define SLJIT_MOVU_SH 13
467 /* Flags: - (never set any flags) */
468 #define SLJIT_MOVU_UI 14
469 /* Flags: - (never set any flags) */
470 #define SLJIT_MOVU_SI 15
471 /* Flags: I | E | K */
472 #define SLJIT_NOT 16
473 /* Flags: I | E | O | K */
474 #define SLJIT_NEG 17
475 /* Count leading zeroes
476 Flags: I | E | K */
477 #define SLJIT_CLZ 18
478
479 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op1(struct sljit_compiler *compiler, int op,
480 int dst, sljit_w dstw,
481 int src, sljit_w srcw);
482
483 /* Flags: I | E | O | C | K */
484 #define SLJIT_ADD 19
485 /* Flags: I | C | K */
486 #define SLJIT_ADDC 20
487 /* Flags: I | E | S | U | O | C | K */
488 #define SLJIT_SUB 21
489 /* Flags: I | C | K */
490 #define SLJIT_SUBC 22
491 /* Note: integer mul */
492 /* Flags: I | O (see SLJIT_C_MUL_*) | K */
493 #define SLJIT_MUL 23
494 /* Flags: I | E | K */
495 #define SLJIT_AND 24
496 /* Flags: I | E | K */
497 #define SLJIT_OR 25
498 /* Flags: I | E | K */
499 #define SLJIT_XOR 26
500 /* Flags: I | E | K */
501 #define SLJIT_SHL 27
502 /* Flags: I | E | K */
503 #define SLJIT_LSHR 28
504 /* Flags: I | E | K */
505 #define SLJIT_ASHR 29
506
507 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op2(struct sljit_compiler *compiler, int op,
508 int dst, sljit_w dstw,
509 int src1, sljit_w src1w,
510 int src2, sljit_w src2w);
511
512 SLJIT_API_FUNC_ATTRIBUTE int sljit_is_fpu_available(void);
513
514 /* Note: dst is the left and src is the right operand for SLJIT_FCMP.
515 Note: NaN check is always performed. If SLJIT_C_FLOAT_NAN is set,
516 the comparison result is unpredictable.
517 Flags: E | S (see SLJIT_C_FLOAT_*) */
518 #define SLJIT_FCMP 30
519 /* Flags: - (never set any flags) */
520 #define SLJIT_FMOV 31
521 /* Flags: - (never set any flags) */
522 #define SLJIT_FNEG 32
523 /* Flags: - (never set any flags) */
524 #define SLJIT_FABS 33
525
526 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fop1(struct sljit_compiler *compiler, int op,
527 int dst, sljit_w dstw,
528 int src, sljit_w srcw);
529
530 /* Flags: - (never set any flags) */
531 #define SLJIT_FADD 34
532 /* Flags: - (never set any flags) */
533 #define SLJIT_FSUB 35
534 /* Flags: - (never set any flags) */
535 #define SLJIT_FMUL 36
536 /* Flags: - (never set any flags) */
537 #define SLJIT_FDIV 37
538
539 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fop2(struct sljit_compiler *compiler, int op,
540 int dst, sljit_w dstw,
541 int src1, sljit_w src1w,
542 int src2, sljit_w src2w);
543
544 /* Label and jump instructions. */
545
546 SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler);
547
548 /* Invert conditional instruction: xor (^) with 0x1 */
549 #define SLJIT_C_EQUAL 0
550 #define SLJIT_C_ZERO 0
551 #define SLJIT_C_NOT_EQUAL 1
552 #define SLJIT_C_NOT_ZERO 1
553
554 #define SLJIT_C_LESS 2
555 #define SLJIT_C_GREATER_EQUAL 3
556 #define SLJIT_C_GREATER 4
557 #define SLJIT_C_LESS_EQUAL 5
558 #define SLJIT_C_SIG_LESS 6
559 #define SLJIT_C_SIG_GREATER_EQUAL 7
560 #define SLJIT_C_SIG_GREATER 8
561 #define SLJIT_C_SIG_LESS_EQUAL 9
562
563 #define SLJIT_C_OVERFLOW 10
564 #define SLJIT_C_NOT_OVERFLOW 11
565
566 #define SLJIT_C_MUL_OVERFLOW 12
567 #define SLJIT_C_MUL_NOT_OVERFLOW 13
568
569 #define SLJIT_C_FLOAT_EQUAL 14
570 #define SLJIT_C_FLOAT_NOT_EQUAL 15
571 #define SLJIT_C_FLOAT_LESS 16
572 #define SLJIT_C_FLOAT_GREATER_EQUAL 17
573 #define SLJIT_C_FLOAT_GREATER 18
574 #define SLJIT_C_FLOAT_LESS_EQUAL 19
575 #define SLJIT_C_FLOAT_NAN 20
576 #define SLJIT_C_FLOAT_NOT_NAN 21
577
578 #define SLJIT_JUMP 22
579 #define SLJIT_FAST_CALL 23
580 #define SLJIT_CALL0 24
581 #define SLJIT_CALL1 25
582 #define SLJIT_CALL2 26
583 #define SLJIT_CALL3 27
584
585 /* Fast calling method. See sljit_emit_fast_enter / sljit_emit_fast_return. */
586
587 /* The target can be changed during runtime (see: sljit_set_jump_addr). */
588 #define SLJIT_REWRITABLE_JUMP 0x1000
589
590 /* Emit a jump instruction. The destination is not set, only the type of the jump.
591 type must be between SLJIT_C_EQUAL and SLJIT_CALL3
592 type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP
593 Flags: - (never set any flags) for both conditional and unconditional jumps.
594 Flags: destroy all flags for calls. */
595 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, int type);
596
597 /* Basic arithmetic comparison. In most architectures it is equal to
598 an SLJIT_SUB operation (with SLJIT_UNUSED destination) followed by a
599 sljit_emit_jump. However some architectures (i.e: MIPS) may employ
600 special optimizations here. It is suggested to use this comparison
601 form when flags are unimportant.
602 type must be between SLJIT_C_EQUAL and SLJIT_C_SIG_LESS_EQUAL
603 type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP or SLJIT_INT_OP
604 Flags: destroy flags. */
605 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_cmp(struct sljit_compiler *compiler, int type,
606 int src1, sljit_w src1w,
607 int src2, sljit_w src2w);
608
609 /* Set the destination of the jump to this label. */
610 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_label(struct sljit_jump *jump, struct sljit_label* label);
611 /* Only for jumps defined with SLJIT_REWRITABLE_JUMP flag.
612 Note: use sljit_emit_ijump for fixed jumps. */
613 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_target(struct sljit_jump *jump, sljit_uw target);
614
615 /* Call function or jump anywhere. Both direct and indirect form
616 type must be between SLJIT_JUMP and SLJIT_CALL3
617 Direct form: set src to SLJIT_IMM() and srcw to the address
618 Indirect form: any other valid addressing mode
619 Flags: - (never set any flags) for unconditional jumps.
620 Flags: destroy all flags for calls. */
621 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_ijump(struct sljit_compiler *compiler, int type, int src, sljit_w srcw);
622
623 /* If op == SLJIT_MOV:
624 Set dst to 1 if condition is fulfilled, 0 otherwise
625 type must be between SLJIT_C_EQUAL and SLJIT_C_FLOAT_NOT_NAN
626 Flags: - (never set any flags)
627 If op == SLJIT_OR
628 Dst is used as src as well, and set its lowest bit to 1 if
629 the condition is fulfilled. Otherwise it does nothing.
630 Flags: E | K
631 Note: sljit_emit_cond_value does nothing, if dst is SLJIT_UNUSED (regardless of op). */
632 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_cond_value(struct sljit_compiler *compiler, int op, int dst, sljit_w dstw, int type);
633
634 /* The constant can be changed runtime (see: sljit_set_const)
635 Flags: - (never set any flags) */
636 SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, int dst, sljit_w dstw, sljit_w init_value);
637
638 /* After the code generation the address for label, jump and const instructions
639 are computed. Since these structures are freed sljit_free_compiler, the
640 addresses must be preserved by the user program elsewere. */
641 static SLJIT_INLINE sljit_uw sljit_get_label_addr(struct sljit_label *label) { return label->addr; }
642 static SLJIT_INLINE sljit_uw sljit_get_jump_addr(struct sljit_jump *jump) { return jump->addr; }
643 static SLJIT_INLINE sljit_uw sljit_get_const_addr(struct sljit_const *const_) { return const_->addr; }
644
645 /* Only the address is required to rewrite the code. */
646 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr);
647 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_w new_constant);
648
649 /* --------------------------------------------------------------------- */
650 /* Miscellaneous utility functions */
651 /* --------------------------------------------------------------------- */
652
653 #define SLJIT_MAJOR_VERSION 0
654 #define SLJIT_MINOR_VERSION 82
655
656 /* Get the human readable name of the platfrom.
657 Can be useful for debugging on platforms like ARM, where ARM and
658 Thumb2 functions can be mixed. */
659 SLJIT_API_FUNC_ATTRIBUTE SLJIT_CONST char* sljit_get_platform_name(void);
660
661 /* Portble helper function to get an offset of a member. */
662 #define SLJIT_OFFSETOF(base, member) ((sljit_w)(&((base*)0x10)->member) - 0x10)
663
664 #if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK)
665 /* This global lock is useful to compile common functions. */
666 SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void);
667 SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void);
668 #endif
669
670 #if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK)
671
672 /* The sljit_stack is a utiliy feature of sljit, which allocates a
673 writable memory region between base (inclusive) and limit (exclusive).
674 Both base and limit is a pointer, and base is always <= than limit.
675 This feature uses the "address space reserve" feature
676 of modern operating systems. Basically we don't need to allocate a
677 huge memory block in one step for the worst case, we can start with
678 a smaller chunk and extend it later. Since the address space is
679 reserved, the data never copied to other regions, thus it is safe
680 to store pointers here. */
681
682 /* Note: The base field is aligned to PAGE_SIZE bytes (usually 4k or more).
683 Note: stack growing should not happen in small steps: 4k, 16k or even
684 bigger growth is better.
685 Note: this structure may not be supported by all operating systems.
686 Some kind of fallback mechanism is suggested when SLJIT_UTIL_STACK
687 is not defined. */
688
689 struct sljit_stack {
690 /* User data, anything can be stored here.
691 Starting with the same value as base. */
692 sljit_uw top;
693 /* These members are read only. */
694 sljit_uw base;
695 sljit_uw limit;
696 sljit_uw max_limit;
697 };
698
699 /* Returns NULL if unsuccessful.
700 Note: limit and max_limit contains the size for stack allocation
701 Note: the top field is initialized to base. */
702 SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(sljit_uw limit, sljit_uw max_limit);
703 SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_free_stack(struct sljit_stack* stack);
704
705 /* Can be used to increase (allocate) or decrease (free) the memory area.
706 Returns with a non-zero value if unsuccessful. If new_limit is greater than
707 max_limit, it will fail. It is very easy to implement a stack data structure,
708 since the growth ratio can be added to the current limit, and sljit_stack_resize
709 will do all the necessary checks. The fields of the stack are not changed if
710 sljit_stack_resize fails. */
711 SLJIT_API_FUNC_ATTRIBUTE sljit_w SLJIT_CALL sljit_stack_resize(struct sljit_stack* stack, sljit_uw new_limit);
712
713 #endif /* (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) */
714
715 #if !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL)
716
717 /* Get the entry address of a given function. */
718 #define SLJIT_FUNC_OFFSET(func_name) ((sljit_w)func_name)
719
720 #else /* !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) */
721
722 /* All JIT related code should be placed in the same context (library, binary, etc.). */
723
724 #define SLJIT_FUNC_OFFSET(func_name) ((sljit_w)*(void**)func_name)
725
726 /* For powerpc64, the function pointers point to a context descriptor. */
727 struct sljit_function_context {
728 sljit_w addr;
729 sljit_w r2;
730 sljit_w r11;
731 };
732
733 /* Fill the context arguments using the addr and the function.
734 If func_ptr is NULL, it will not be set to the address of context
735 If addr is NULL, the function address also comes from the func pointer. */
736 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_function_context(void** func_ptr, struct sljit_function_context* context, sljit_w addr, void* func);
737
738 #endif /* !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) */
739
740 #endif /* _SLJIT_LIR_H_ */

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