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

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Revision 836 - (show annotations)
Wed Dec 28 17:16:11 2011 UTC (7 years, 8 months ago) by ph10
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Merging all the changes from the pcre16 branch into the trunk.
1 /*
2 * Stack-less Just-In-Time compiler
3 *
4 * Copyright 2009-2012 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 /* For statistical purposes. */
199 sljit_uw executable_size;
200
201 #if (defined SLJIT_CONFIG_X86_32 && SLJIT_CONFIG_X86_32)
202 int args;
203 int temporaries_start;
204 int generals_start;
205 #endif
206
207 #if (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64)
208 int mode32;
209 #ifdef _WIN64
210 int has_locals;
211 #endif
212 #endif
213
214 #if (defined SLJIT_CONFIG_X86_32 && SLJIT_CONFIG_X86_32) || (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64)
215 int flags_saved;
216 #endif
217
218 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
219 /* Constant pool handling. */
220 sljit_uw *cpool;
221 sljit_ub *cpool_unique;
222 sljit_uw cpool_diff;
223 sljit_uw cpool_fill;
224 /* General fields. */
225 /* Contains pointer, "ldr pc, [...]" pairs. */
226 sljit_uw patches;
227 #endif
228
229 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5) || (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
230 /* Temporary fields. */
231 sljit_uw shift_imm;
232 int cache_arg;
233 sljit_w cache_argw;
234 #endif
235
236 #if (defined SLJIT_CONFIG_ARM_THUMB2 && SLJIT_CONFIG_ARM_THUMB2)
237 int cache_arg;
238 sljit_w cache_argw;
239 #endif
240
241 #if (defined SLJIT_CONFIG_PPC_32 && SLJIT_CONFIG_PPC_32) || (defined SLJIT_CONFIG_PPC_64 && SLJIT_CONFIG_PPC_64)
242 int has_locals;
243 sljit_w imm;
244 int cache_arg;
245 sljit_w cache_argw;
246 #endif
247
248 #if (defined SLJIT_CONFIG_MIPS_32 && SLJIT_CONFIG_MIPS_32)
249 int has_locals;
250 int delay_slot;
251 int cache_arg;
252 sljit_w cache_argw;
253 #endif
254
255 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE)
256 FILE* verbose;
257 #endif
258
259 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) || (defined SLJIT_DEBUG && SLJIT_DEBUG)
260 int skip_checks;
261 #endif
262 };
263
264 /* --------------------------------------------------------------------- */
265 /* Main functions */
266 /* --------------------------------------------------------------------- */
267
268 /* Creates an sljit compiler.
269 Returns NULL if failed. */
270 SLJIT_API_FUNC_ATTRIBUTE struct sljit_compiler* sljit_create_compiler(void);
271 /* Free everything except the codes. */
272 SLJIT_API_FUNC_ATTRIBUTE void sljit_free_compiler(struct sljit_compiler *compiler);
273
274 static SLJIT_INLINE int sljit_get_compiler_error(struct sljit_compiler *compiler) { return compiler->error; }
275
276 /*
277 Allocate a small amount of memory. The size must be <= 64 bytes on 32 bit,
278 and <= 128 bytes on 64 bit architectures. The memory area is owned by the compiler,
279 and freed by sljit_free_compiler. The returned pointer is sizeof(sljit_w) aligned.
280 Excellent for allocating small blocks during the compiling, and no need to worry
281 about freeing them. The size is enough to contain at most 16 pointers.
282 If the size is outside of the range, the function will return with NULL,
283 but this return value does not indicate that there is no more memory (does
284 not set the compiler to out-of-memory status).
285 */
286 SLJIT_API_FUNC_ATTRIBUTE void* sljit_alloc_memory(struct sljit_compiler *compiler, int size);
287
288 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE)
289 /* Passing NULL disables verbose. */
290 SLJIT_API_FUNC_ATTRIBUTE void sljit_compiler_verbose(struct sljit_compiler *compiler, FILE* verbose);
291 #endif
292
293 SLJIT_API_FUNC_ATTRIBUTE void* sljit_generate_code(struct sljit_compiler *compiler);
294 SLJIT_API_FUNC_ATTRIBUTE void sljit_free_code(void* code);
295
296 /*
297 After the code generation we can retrieve the allocated executable memory size,
298 although this area may not be fully filled with instructions depending on some
299 optimizations. This function is useful only for statistical purposes.
300
301 Before a successful code generation, this function returns with 0.
302 */
303 static SLJIT_INLINE sljit_uw sljit_get_generated_code_size(struct sljit_compiler *compiler) { return compiler->executable_size; }
304
305 /* Instruction generation. Returns with error code. */
306
307 /*
308 Entry instruction. The instruction has "args" number of arguments
309 and will use the first "general" number of general registers.
310 The arguments are passed into the general registers (arg1 to general_reg1, and so on).
311 Thus, "args" must be less or equal than "general". A local_size extra
312 stack space is allocated for the jit code (must be less or equal than
313 SLJIT_MAX_LOCAL_SIZE), which can accessed through SLJIT_LOCALS_REG (see
314 the notes there). SLJIT_LOCALS_REG is not necessary the real stack pointer!
315 It just points somewhere in the stack if local_size > 0 (!). Thus, the only
316 thing which is known that the memory area between SLJIT_LOCALS_REG and
317 SLJIT_LOCALS_REG + local_size is a valid stack area if local_size > 0
318 */
319
320 /* Note: multiple calls of this function overwrites the previous call. */
321
322 #define SLJIT_MAX_LOCAL_SIZE 65536
323
324 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size);
325
326 /* Since sljit_emit_return (and many asserts) uses variables which are initialized
327 by sljit_emit_enter, a simple return is not possible if these variables are not
328 initialized. sljit_fake_enter does not emit any instruction, just initialize
329 those variables. */
330
331 /* Note: multiple calls of this function overwrites the previous call. */
332
333 SLJIT_API_FUNC_ATTRIBUTE void sljit_fake_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size);
334
335 /* Return from jit. See below the possible values for src and srcw. */
336 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_return(struct sljit_compiler *compiler, int src, sljit_w srcw);
337
338 /* Really fast calling method for utility functions inside sljit (see SLJIT_FAST_CALL).
339 All registers and even the stack frame is passed to the callee. The return address is
340 preserved in dst/dstw by sljit_emit_fast_enter, and sljit_emit_fast_return can
341 use this as a return value later. */
342
343 /* Note: only for sljit specific, non ABI compilant calls. Fast, since only a few machine instructions
344 are needed. Excellent for small uility functions, where saving general registers and setting up
345 a new stack frame would cost too much performance. However, it is still possible to return
346 to the address of the caller (or anywhere else). */
347
348 /* Note: flags are not changed (unlike sljit_emit_enter / sljit_emit_return). */
349
350 /* Note: although sljit_emit_fast_return could be replaced by an ijump, it is not suggested,
351 since many architectures do clever branch prediction on call / return instruction pairs. */
352
353 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);
354 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_return(struct sljit_compiler *compiler, int src, sljit_w srcw);
355
356 /*
357 Source and destination values for arithmetical instructions
358 imm - a simple immediate value (cannot be used as a destination)
359 reg - any of the registers (immediate argument must be 0)
360 [imm] - absolute immediate memory address
361 [reg+imm] - indirect memory address
362 [reg+(reg<<imm)] - indirect indexed memory address (shift must be between 0 and 3)
363 useful for (byte, half, int, sljit_w) array access
364 (fully supported by both x86 and ARM architectures, and cheap operation on others)
365 */
366
367 /*
368 IMPORATNT NOTE: memory access MUST be naturally aligned.
369 length | alignment
370 ---------+-----------
371 byte | 1 byte (not aligned)
372 half | 2 byte (real_address & 0x1 == 0)
373 int | 4 byte (real_address & 0x3 == 0)
374 sljit_w | 4 byte if SLJIT_32BIT_ARCHITECTURE defined
375 | 8 byte if SLJIT_64BIT_ARCHITECTURE defined
376 (This is a strict requirement for embedded systems.)
377
378 Note: different architectures have different addressing limitations
379 Thus sljit may generate several instructions for other addressing modes
380 x86: all addressing modes supported, but write-back is not supported
381 (requires an extra instruction). On x86-64 only 32 bit signed
382 integers are supported by the architecture.
383 arm: [reg+imm] supported for small immediates (-4095 <= imm <= 4095
384 or -255 <= imm <= 255 for loading signed bytes, any halfs or doubles)
385 [reg+(reg<<imm)] are supported or requires only two instructions
386 Write back is limited to small immediates on thumb2
387 ppc: [reg+imm], -65535 <= imm <= 65535. 64 bit moves requires immediates
388 divisible by 4. [reg+reg] supported, write-back supported
389 [reg+(reg<<imm)] (imm != 0) is cheap (requires two instructions)
390 */
391
392 /* Register output: simply the name of the register.
393 For destination, you can use SLJIT_UNUSED as well. */
394 #define SLJIT_MEM 0x100
395 #define SLJIT_MEM0() (SLJIT_MEM)
396 #define SLJIT_MEM1(r1) (SLJIT_MEM | (r1))
397 #define SLJIT_MEM2(r1, r2) (SLJIT_MEM | (r1) | ((r2) << 4))
398 #define SLJIT_IMM 0x200
399
400 /* Set 32 bit operation mode (I) on 64 bit CPUs. The flag is totally ignored on
401 32 bit CPUs. The arithmetic instruction uses only the lower 32 bit of the
402 input register(s), and set the flags according to the 32 bit result. If the
403 destination is a register, the higher 32 bit of the result is undefined.
404 The addressing modes (SLJIT_MEM1/SLJIT_MEM2 macros) are unaffected by this flag. */
405 #define SLJIT_INT_OP 0x100
406
407 /* Common CPU status flags for all architectures (x86, ARM, PPC)
408 - carry flag
409 - overflow flag
410 - zero flag
411 - negative/positive flag (depends on arc)
412 On mips, these flags are emulated by software. */
413
414 /* By default, the instructions may, or may not set the CPU status flags.
415 Forcing to set or keep status flags can be done with the following flags: */
416
417 /* Note: sljit tries to emit the minimum number of instructions. Using these
418 flags can increase them, so use them wisely to avoid unnecessary code generation. */
419
420 /* Set Equal (Zero) status flag (E). */
421 #define SLJIT_SET_E 0x0200
422 /* Set signed status flag (S). */
423 #define SLJIT_SET_S 0x0400
424 /* Set unsgined status flag (U). */
425 #define SLJIT_SET_U 0x0800
426 /* Set signed overflow flag (O). */
427 #define SLJIT_SET_O 0x1000
428 /* Set carry flag (C).
429 Note: Kinda unsigned overflow, but behaves differently on various cpus. */
430 #define SLJIT_SET_C 0x2000
431 /* Do not modify the flags (K).
432 Note: This flag cannot be combined with any other SLJIT_SET_* flag. */
433 #define SLJIT_KEEP_FLAGS 0x4000
434
435 /* Notes:
436 - you cannot postpone conditional jump instructions except if noted that
437 the instruction does not set flags (See: SLJIT_KEEP_FLAGS).
438 - flag combinations: '|' means 'logical or'. */
439
440 /* Flags: - (never set any flags)
441 Note: breakpoint instruction is not supported by all architectures (namely ppc)
442 It falls back to SLJIT_NOP in those cases. */
443 #define SLJIT_BREAKPOINT 0
444 /* Flags: - (never set any flags)
445 Note: may or may not cause an extra cycle wait
446 it can even decrease the runtime in a few cases. */
447 #define SLJIT_NOP 1
448
449 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op0(struct sljit_compiler *compiler, int op);
450
451 /* Notes for MOV instructions:
452 U = Mov with update (post form). If source or destination defined as SLJIT_MEM1(r1)
453 or SLJIT_MEM2(r1, r2), r1 is increased by the sum of r2 and the constant argument
454 UB = unsigned byte (8 bit)
455 SB = signed byte (8 bit)
456 UH = unsgined half (16 bit)
457 SH = unsgined half (16 bit) */
458
459 /* Flags: - (never set any flags) */
460 #define SLJIT_MOV 2
461 /* Flags: - (never set any flags) */
462 #define SLJIT_MOV_UB 3
463 /* Flags: - (never set any flags) */
464 #define SLJIT_MOV_SB 4
465 /* Flags: - (never set any flags) */
466 #define SLJIT_MOV_UH 5
467 /* Flags: - (never set any flags) */
468 #define SLJIT_MOV_SH 6
469 /* Flags: - (never set any flags) */
470 #define SLJIT_MOV_UI 7
471 /* Flags: - (never set any flags) */
472 #define SLJIT_MOV_SI 8
473 /* Flags: - (never set any flags) */
474 #define SLJIT_MOVU 9
475 /* Flags: - (never set any flags) */
476 #define SLJIT_MOVU_UB 10
477 /* Flags: - (never set any flags) */
478 #define SLJIT_MOVU_SB 11
479 /* Flags: - (never set any flags) */
480 #define SLJIT_MOVU_UH 12
481 /* Flags: - (never set any flags) */
482 #define SLJIT_MOVU_SH 13
483 /* Flags: - (never set any flags) */
484 #define SLJIT_MOVU_UI 14
485 /* Flags: - (never set any flags) */
486 #define SLJIT_MOVU_SI 15
487 /* Flags: I | E | K */
488 #define SLJIT_NOT 16
489 /* Flags: I | E | O | K */
490 #define SLJIT_NEG 17
491 /* Count leading zeroes
492 Flags: I | E | K */
493 #define SLJIT_CLZ 18
494
495 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op1(struct sljit_compiler *compiler, int op,
496 int dst, sljit_w dstw,
497 int src, sljit_w srcw);
498
499 /* Flags: I | E | O | C | K */
500 #define SLJIT_ADD 19
501 /* Flags: I | C | K */
502 #define SLJIT_ADDC 20
503 /* Flags: I | E | S | U | O | C | K */
504 #define SLJIT_SUB 21
505 /* Flags: I | C | K */
506 #define SLJIT_SUBC 22
507 /* Note: integer mul */
508 /* Flags: I | O (see SLJIT_C_MUL_*) | K */
509 #define SLJIT_MUL 23
510 /* Flags: I | E | K */
511 #define SLJIT_AND 24
512 /* Flags: I | E | K */
513 #define SLJIT_OR 25
514 /* Flags: I | E | K */
515 #define SLJIT_XOR 26
516 /* Flags: I | E | K */
517 #define SLJIT_SHL 27
518 /* Flags: I | E | K */
519 #define SLJIT_LSHR 28
520 /* Flags: I | E | K */
521 #define SLJIT_ASHR 29
522
523 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op2(struct sljit_compiler *compiler, int op,
524 int dst, sljit_w dstw,
525 int src1, sljit_w src1w,
526 int src2, sljit_w src2w);
527
528 SLJIT_API_FUNC_ATTRIBUTE int sljit_is_fpu_available(void);
529
530 /* Note: dst is the left and src is the right operand for SLJIT_FCMP.
531 Note: NaN check is always performed. If SLJIT_C_FLOAT_NAN is set,
532 the comparison result is unpredictable.
533 Flags: E | S (see SLJIT_C_FLOAT_*) */
534 #define SLJIT_FCMP 30
535 /* Flags: - (never set any flags) */
536 #define SLJIT_FMOV 31
537 /* Flags: - (never set any flags) */
538 #define SLJIT_FNEG 32
539 /* Flags: - (never set any flags) */
540 #define SLJIT_FABS 33
541
542 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fop1(struct sljit_compiler *compiler, int op,
543 int dst, sljit_w dstw,
544 int src, sljit_w srcw);
545
546 /* Flags: - (never set any flags) */
547 #define SLJIT_FADD 34
548 /* Flags: - (never set any flags) */
549 #define SLJIT_FSUB 35
550 /* Flags: - (never set any flags) */
551 #define SLJIT_FMUL 36
552 /* Flags: - (never set any flags) */
553 #define SLJIT_FDIV 37
554
555 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fop2(struct sljit_compiler *compiler, int op,
556 int dst, sljit_w dstw,
557 int src1, sljit_w src1w,
558 int src2, sljit_w src2w);
559
560 /* Label and jump instructions. */
561
562 SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler);
563
564 /* Invert conditional instruction: xor (^) with 0x1 */
565 #define SLJIT_C_EQUAL 0
566 #define SLJIT_C_ZERO 0
567 #define SLJIT_C_NOT_EQUAL 1
568 #define SLJIT_C_NOT_ZERO 1
569
570 #define SLJIT_C_LESS 2
571 #define SLJIT_C_GREATER_EQUAL 3
572 #define SLJIT_C_GREATER 4
573 #define SLJIT_C_LESS_EQUAL 5
574 #define SLJIT_C_SIG_LESS 6
575 #define SLJIT_C_SIG_GREATER_EQUAL 7
576 #define SLJIT_C_SIG_GREATER 8
577 #define SLJIT_C_SIG_LESS_EQUAL 9
578
579 #define SLJIT_C_OVERFLOW 10
580 #define SLJIT_C_NOT_OVERFLOW 11
581
582 #define SLJIT_C_MUL_OVERFLOW 12
583 #define SLJIT_C_MUL_NOT_OVERFLOW 13
584
585 #define SLJIT_C_FLOAT_EQUAL 14
586 #define SLJIT_C_FLOAT_NOT_EQUAL 15
587 #define SLJIT_C_FLOAT_LESS 16
588 #define SLJIT_C_FLOAT_GREATER_EQUAL 17
589 #define SLJIT_C_FLOAT_GREATER 18
590 #define SLJIT_C_FLOAT_LESS_EQUAL 19
591 #define SLJIT_C_FLOAT_NAN 20
592 #define SLJIT_C_FLOAT_NOT_NAN 21
593
594 #define SLJIT_JUMP 22
595 #define SLJIT_FAST_CALL 23
596 #define SLJIT_CALL0 24
597 #define SLJIT_CALL1 25
598 #define SLJIT_CALL2 26
599 #define SLJIT_CALL3 27
600
601 /* Fast calling method. See sljit_emit_fast_enter / sljit_emit_fast_return. */
602
603 /* The target can be changed during runtime (see: sljit_set_jump_addr). */
604 #define SLJIT_REWRITABLE_JUMP 0x1000
605
606 /* Emit a jump instruction. The destination is not set, only the type of the jump.
607 type must be between SLJIT_C_EQUAL and SLJIT_CALL3
608 type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP
609 Flags: - (never set any flags) for both conditional and unconditional jumps.
610 Flags: destroy all flags for calls. */
611 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, int type);
612
613 /* Basic arithmetic comparison. In most architectures it is equal to
614 an SLJIT_SUB operation (with SLJIT_UNUSED destination) followed by a
615 sljit_emit_jump. However some architectures (i.e: MIPS) may employ
616 special optimizations here. It is suggested to use this comparison
617 form when flags are unimportant.
618 type must be between SLJIT_C_EQUAL and SLJIT_C_SIG_LESS_EQUAL
619 type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP or SLJIT_INT_OP
620 Flags: destroy flags. */
621 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_cmp(struct sljit_compiler *compiler, int type,
622 int src1, sljit_w src1w,
623 int src2, sljit_w src2w);
624
625 /* Set the destination of the jump to this label. */
626 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_label(struct sljit_jump *jump, struct sljit_label* label);
627 /* Only for jumps defined with SLJIT_REWRITABLE_JUMP flag.
628 Note: use sljit_emit_ijump for fixed jumps. */
629 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_target(struct sljit_jump *jump, sljit_uw target);
630
631 /* Call function or jump anywhere. Both direct and indirect form
632 type must be between SLJIT_JUMP and SLJIT_CALL3
633 Direct form: set src to SLJIT_IMM() and srcw to the address
634 Indirect form: any other valid addressing mode
635 Flags: - (never set any flags) for unconditional jumps.
636 Flags: destroy all flags for calls. */
637 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_ijump(struct sljit_compiler *compiler, int type, int src, sljit_w srcw);
638
639 /* If op == SLJIT_MOV:
640 Set dst to 1 if condition is fulfilled, 0 otherwise
641 type must be between SLJIT_C_EQUAL and SLJIT_C_FLOAT_NOT_NAN
642 Flags: - (never set any flags)
643 If op == SLJIT_OR
644 Dst is used as src as well, and set its lowest bit to 1 if
645 the condition is fulfilled. Otherwise it does nothing.
646 Flags: E | K
647 Note: sljit_emit_cond_value does nothing, if dst is SLJIT_UNUSED (regardless of op). */
648 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_cond_value(struct sljit_compiler *compiler, int op, int dst, sljit_w dstw, int type);
649
650 /* The constant can be changed runtime (see: sljit_set_const)
651 Flags: - (never set any flags) */
652 SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, int dst, sljit_w dstw, sljit_w init_value);
653
654 /* After the code generation the address for label, jump and const instructions
655 are computed. Since these structures are freed sljit_free_compiler, the
656 addresses must be preserved by the user program elsewere. */
657 static SLJIT_INLINE sljit_uw sljit_get_label_addr(struct sljit_label *label) { return label->addr; }
658 static SLJIT_INLINE sljit_uw sljit_get_jump_addr(struct sljit_jump *jump) { return jump->addr; }
659 static SLJIT_INLINE sljit_uw sljit_get_const_addr(struct sljit_const *const_) { return const_->addr; }
660
661 /* Only the address is required to rewrite the code. */
662 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr);
663 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_w new_constant);
664
665 /* --------------------------------------------------------------------- */
666 /* Miscellaneous utility functions */
667 /* --------------------------------------------------------------------- */
668
669 #define SLJIT_MAJOR_VERSION 0
670 #define SLJIT_MINOR_VERSION 82
671
672 /* Get the human readable name of the platfrom.
673 Can be useful for debugging on platforms like ARM, where ARM and
674 Thumb2 functions can be mixed. */
675 SLJIT_API_FUNC_ATTRIBUTE SLJIT_CONST char* sljit_get_platform_name(void);
676
677 /* Portble helper function to get an offset of a member. */
678 #define SLJIT_OFFSETOF(base, member) ((sljit_w)(&((base*)0x10)->member) - 0x10)
679
680 #if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK)
681 /* This global lock is useful to compile common functions. */
682 SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void);
683 SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void);
684 #endif
685
686 #if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK)
687
688 /* The sljit_stack is a utiliy feature of sljit, which allocates a
689 writable memory region between base (inclusive) and limit (exclusive).
690 Both base and limit is a pointer, and base is always <= than limit.
691 This feature uses the "address space reserve" feature
692 of modern operating systems. Basically we don't need to allocate a
693 huge memory block in one step for the worst case, we can start with
694 a smaller chunk and extend it later. Since the address space is
695 reserved, the data never copied to other regions, thus it is safe
696 to store pointers here. */
697
698 /* Note: The base field is aligned to PAGE_SIZE bytes (usually 4k or more).
699 Note: stack growing should not happen in small steps: 4k, 16k or even
700 bigger growth is better.
701 Note: this structure may not be supported by all operating systems.
702 Some kind of fallback mechanism is suggested when SLJIT_UTIL_STACK
703 is not defined. */
704
705 struct sljit_stack {
706 /* User data, anything can be stored here.
707 Starting with the same value as base. */
708 sljit_uw top;
709 /* These members are read only. */
710 sljit_uw base;
711 sljit_uw limit;
712 sljit_uw max_limit;
713 };
714
715 /* Returns NULL if unsuccessful.
716 Note: limit and max_limit contains the size for stack allocation
717 Note: the top field is initialized to base. */
718 SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(sljit_uw limit, sljit_uw max_limit);
719 SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_free_stack(struct sljit_stack* stack);
720
721 /* Can be used to increase (allocate) or decrease (free) the memory area.
722 Returns with a non-zero value if unsuccessful. If new_limit is greater than
723 max_limit, it will fail. It is very easy to implement a stack data structure,
724 since the growth ratio can be added to the current limit, and sljit_stack_resize
725 will do all the necessary checks. The fields of the stack are not changed if
726 sljit_stack_resize fails. */
727 SLJIT_API_FUNC_ATTRIBUTE sljit_w SLJIT_CALL sljit_stack_resize(struct sljit_stack* stack, sljit_uw new_limit);
728
729 #endif /* (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) */
730
731 #if !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL)
732
733 /* Get the entry address of a given function. */
734 #define SLJIT_FUNC_OFFSET(func_name) ((sljit_w)func_name)
735
736 #else /* !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) */
737
738 /* All JIT related code should be placed in the same context (library, binary, etc.). */
739
740 #define SLJIT_FUNC_OFFSET(func_name) ((sljit_w)*(void**)func_name)
741
742 /* For powerpc64, the function pointers point to a context descriptor. */
743 struct sljit_function_context {
744 sljit_w addr;
745 sljit_w r2;
746 sljit_w r11;
747 };
748
749 /* Fill the context arguments using the addr and the function.
750 If func_ptr is NULL, it will not be set to the address of context
751 If addr is NULL, the function address also comes from the func pointer. */
752 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_function_context(void** func_ptr, struct sljit_function_context* context, sljit_w addr, void* func);
753
754 #endif /* !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) */
755
756 #endif /* _SLJIT_LIR_H_ */

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