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

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Revision 850 - (show annotations)
Wed Jan 4 17:29:11 2012 UTC (7 years, 7 months ago) by zherczeg
File MIME type: text/plain
File size: 33092 byte(s)
add pcre16_callout_block and pcre16_extra
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
68 /* The following header file defines useful macros for fine tuning
69 sljit based code generators. They are listed in the begining
70 of sljitConfigInternal.h */
71
72 #include "sljitConfigInternal.h"
73
74 /* --------------------------------------------------------------------- */
75 /* Error codes */
76 /* --------------------------------------------------------------------- */
77
78 /* Indicates no error. */
79 #define SLJIT_SUCCESS 0
80 /* After the call of sljit_generate_code(), the error code of the compiler
81 is set to this value to avoid future sljit calls (in debug mode at least).
82 The complier should be freed after sljit_generate_code(). */
83 #define SLJIT_ERR_COMPILED 1
84 /* Cannot allocate non executable memory. */
85 #define SLJIT_ERR_ALLOC_FAILED 2
86 /* Cannot allocate executable memory.
87 Only for sljit_generate_code() */
88 #define SLJIT_ERR_EX_ALLOC_FAILED 3
89 /* return value for SLJIT_CONFIG_UNSUPPORTED empty architecture. */
90 #define SLJIT_ERR_UNSUPPORTED 4
91
92 /* --------------------------------------------------------------------- */
93 /* Registers */
94 /* --------------------------------------------------------------------- */
95
96 #define SLJIT_UNUSED 0
97
98 /* Temporary (scratch) registers may not preserve their values across function calls. */
99 #define SLJIT_TEMPORARY_REG1 1
100 #define SLJIT_TEMPORARY_REG2 2
101 #define SLJIT_TEMPORARY_REG3 3
102 /* Note: Extra Registers cannot be used for memory addressing. */
103 /* Note: on x86-32, these registers are emulated (using stack loads & stores). */
104 #define SLJIT_TEMPORARY_EREG1 4
105 #define SLJIT_TEMPORARY_EREG2 5
106
107 /* General (saved) registers preserve their values across function calls. */
108 #define SLJIT_GENERAL_REG1 6
109 #define SLJIT_GENERAL_REG2 7
110 #define SLJIT_GENERAL_REG3 8
111 /* Note: Extra Registers cannot be used for memory addressing. */
112 /* Note: on x86-32, these registers are emulated (using stack loads & stores). */
113 #define SLJIT_GENERAL_EREG1 9
114 #define SLJIT_GENERAL_EREG2 10
115
116 /* Read-only register (cannot be the destination of an operation). */
117 /* Note: SLJIT_MEM2( ... , SLJIT_LOCALS_REG) is not supported (x86 limitation). */
118 /* Note: SLJIT_LOCALS_REG is not necessary the real stack pointer. See sljit_emit_enter. */
119 #define SLJIT_LOCALS_REG 11
120
121 /* Number of registers. */
122 #define SLJIT_NO_TMP_REGISTERS 5
123 #define SLJIT_NO_GEN_REGISTERS 5
124 #define SLJIT_NO_REGISTERS 11
125
126 /* Return with machine word. */
127
128 #define SLJIT_RETURN_REG SLJIT_TEMPORARY_REG1
129
130 /* x86 prefers specific registers for special purposes. In case of shift
131 by register it supports only SLJIT_TEMPORARY_REG3 for shift argument
132 (which is the src2 argument of sljit_emit_op2). If another register is
133 used, sljit must exchange data between registers which cause a minor
134 slowdown. Other architectures has no such limitation. */
135
136 #define SLJIT_PREF_SHIFT_REG SLJIT_TEMPORARY_REG3
137
138 /* --------------------------------------------------------------------- */
139 /* Floating point registers */
140 /* --------------------------------------------------------------------- */
141
142 /* Note: SLJIT_UNUSED as destination is not valid for floating point
143 operations, since they cannot be used for setting flags. */
144
145 /* Floating point operations are performed on double precision values. */
146
147 #define SLJIT_FLOAT_REG1 1
148 #define SLJIT_FLOAT_REG2 2
149 #define SLJIT_FLOAT_REG3 3
150 #define SLJIT_FLOAT_REG4 4
151
152 /* --------------------------------------------------------------------- */
153 /* Main structures and functions */
154 /* --------------------------------------------------------------------- */
155
156 struct sljit_memory_fragment {
157 struct sljit_memory_fragment *next;
158 sljit_uw used_size;
159 sljit_ub memory[1];
160 };
161
162 struct sljit_label {
163 struct sljit_label *next;
164 sljit_uw addr;
165 /* The maximum size difference. */
166 sljit_uw size;
167 };
168
169 struct sljit_jump {
170 struct sljit_jump *next;
171 sljit_uw addr;
172 sljit_w flags;
173 union {
174 sljit_uw target;
175 struct sljit_label* label;
176 } u;
177 };
178
179 struct sljit_const {
180 struct sljit_const *next;
181 sljit_uw addr;
182 };
183
184 struct sljit_compiler {
185 int error;
186
187 struct sljit_label *labels;
188 struct sljit_jump *jumps;
189 struct sljit_const *consts;
190 struct sljit_label *last_label;
191 struct sljit_jump *last_jump;
192 struct sljit_const *last_const;
193
194 struct sljit_memory_fragment *buf;
195 struct sljit_memory_fragment *abuf;
196
197 /* Used local registers. */
198 int temporaries;
199 /* Used general registers. */
200 int generals;
201 /* Local stack size. */
202 int local_size;
203 /* Code size. */
204 sljit_uw size;
205 /* For statistical purposes. */
206 sljit_uw executable_size;
207
208 #if (defined SLJIT_CONFIG_X86_32 && SLJIT_CONFIG_X86_32)
209 int args;
210 int temporaries_start;
211 int generals_start;
212 #endif
213
214 #if (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64)
215 int mode32;
216 #ifdef _WIN64
217 int has_locals;
218 #endif
219 #endif
220
221 #if (defined SLJIT_CONFIG_X86_32 && SLJIT_CONFIG_X86_32) || (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64)
222 int flags_saved;
223 #endif
224
225 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
226 /* Constant pool handling. */
227 sljit_uw *cpool;
228 sljit_ub *cpool_unique;
229 sljit_uw cpool_diff;
230 sljit_uw cpool_fill;
231 /* General fields. */
232 /* Contains pointer, "ldr pc, [...]" pairs. */
233 sljit_uw patches;
234 #endif
235
236 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5) || (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
237 /* Temporary fields. */
238 sljit_uw shift_imm;
239 int cache_arg;
240 sljit_w cache_argw;
241 #endif
242
243 #if (defined SLJIT_CONFIG_ARM_THUMB2 && SLJIT_CONFIG_ARM_THUMB2)
244 int cache_arg;
245 sljit_w cache_argw;
246 #endif
247
248 #if (defined SLJIT_CONFIG_PPC_32 && SLJIT_CONFIG_PPC_32) || (defined SLJIT_CONFIG_PPC_64 && SLJIT_CONFIG_PPC_64)
249 int has_locals;
250 sljit_w imm;
251 int cache_arg;
252 sljit_w cache_argw;
253 #endif
254
255 #if (defined SLJIT_CONFIG_MIPS_32 && SLJIT_CONFIG_MIPS_32)
256 int has_locals;
257 int delay_slot;
258 int cache_arg;
259 sljit_w cache_argw;
260 #endif
261
262 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE)
263 FILE* verbose;
264 #endif
265
266 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) || (defined SLJIT_DEBUG && SLJIT_DEBUG)
267 int skip_checks;
268 #endif
269 };
270
271 /* --------------------------------------------------------------------- */
272 /* Main functions */
273 /* --------------------------------------------------------------------- */
274
275 /* Creates an sljit compiler.
276 Returns NULL if failed. */
277 SLJIT_API_FUNC_ATTRIBUTE struct sljit_compiler* sljit_create_compiler(void);
278 /* Free everything except the codes. */
279 SLJIT_API_FUNC_ATTRIBUTE void sljit_free_compiler(struct sljit_compiler *compiler);
280
281 static SLJIT_INLINE int sljit_get_compiler_error(struct sljit_compiler *compiler) { return compiler->error; }
282
283 /*
284 Allocate a small amount of memory. The size must be <= 64 bytes on 32 bit,
285 and <= 128 bytes on 64 bit architectures. The memory area is owned by the compiler,
286 and freed by sljit_free_compiler. The returned pointer is sizeof(sljit_w) aligned.
287 Excellent for allocating small blocks during the compiling, and no need to worry
288 about freeing them. The size is enough to contain at most 16 pointers.
289 If the size is outside of the range, the function will return with NULL,
290 but this return value does not indicate that there is no more memory (does
291 not set the compiler to out-of-memory status).
292 */
293 SLJIT_API_FUNC_ATTRIBUTE void* sljit_alloc_memory(struct sljit_compiler *compiler, int size);
294
295 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE)
296 /* Passing NULL disables verbose. */
297 SLJIT_API_FUNC_ATTRIBUTE void sljit_compiler_verbose(struct sljit_compiler *compiler, FILE* verbose);
298 #endif
299
300 SLJIT_API_FUNC_ATTRIBUTE void* sljit_generate_code(struct sljit_compiler *compiler);
301 SLJIT_API_FUNC_ATTRIBUTE void sljit_free_code(void* code);
302
303 /*
304 After the code generation we can retrieve the allocated executable memory size,
305 although this area may not be fully filled with instructions depending on some
306 optimizations. This function is useful only for statistical purposes.
307
308 Before a successful code generation, this function returns with 0.
309 */
310 static SLJIT_INLINE sljit_uw sljit_get_generated_code_size(struct sljit_compiler *compiler) { return compiler->executable_size; }
311
312 /* Instruction generation. Returns with error code. */
313
314 /*
315 Entry instruction. The instruction has "args" number of arguments
316 and will use the first "general" number of general registers.
317 The arguments are passed into the general registers (arg1 to general_reg1, and so on).
318 Thus, "args" must be less or equal than "general". A local_size extra
319 stack space is allocated for the jit code (must be less or equal than
320 SLJIT_MAX_LOCAL_SIZE), which can accessed through SLJIT_LOCALS_REG (see
321 the notes there). SLJIT_LOCALS_REG is not necessary the real stack pointer!
322 It just points somewhere in the stack if local_size > 0 (!). Thus, the only
323 thing which is known that the memory area between SLJIT_LOCALS_REG and
324 SLJIT_LOCALS_REG + local_size is a valid stack area if local_size > 0
325 */
326
327 /* Note: multiple calls of this function overwrites the previous call. */
328
329 #define SLJIT_MAX_LOCAL_SIZE 65536
330
331 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size);
332
333 /* Since sljit_emit_return (and many asserts) uses variables which are initialized
334 by sljit_emit_enter, a simple return is not possible if these variables are not
335 initialized. sljit_fake_enter does not emit any instruction, just initialize
336 those variables. */
337
338 /* Note: multiple calls of this function overwrites the previous call. */
339
340 SLJIT_API_FUNC_ATTRIBUTE void sljit_fake_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size);
341
342 /* Return from jit. See below the possible values for src and srcw. */
343 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_return(struct sljit_compiler *compiler, int src, sljit_w srcw);
344
345 /* Really fast calling method for utility functions inside sljit (see SLJIT_FAST_CALL).
346 All registers and even the stack frame is passed to the callee. The return address is
347 preserved in dst/dstw by sljit_emit_fast_enter, and sljit_emit_fast_return can
348 use this as a return value later. */
349
350 /* Note: only for sljit specific, non ABI compilant calls. Fast, since only a few machine instructions
351 are needed. Excellent for small uility functions, where saving general registers and setting up
352 a new stack frame would cost too much performance. However, it is still possible to return
353 to the address of the caller (or anywhere else). */
354
355 /* Note: flags are not changed (unlike sljit_emit_enter / sljit_emit_return). */
356
357 /* Note: although sljit_emit_fast_return could be replaced by an ijump, it is not suggested,
358 since many architectures do clever branch prediction on call / return instruction pairs. */
359
360 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);
361 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_return(struct sljit_compiler *compiler, int src, sljit_w srcw);
362
363 /*
364 Source and destination values for arithmetical instructions
365 imm - a simple immediate value (cannot be used as a destination)
366 reg - any of the registers (immediate argument must be 0)
367 [imm] - absolute immediate memory address
368 [reg+imm] - indirect memory address
369 [reg+(reg<<imm)] - indirect indexed memory address (shift must be between 0 and 3)
370 useful for (byte, half, int, sljit_w) array access
371 (fully supported by both x86 and ARM architectures, and cheap operation on others)
372 */
373
374 /*
375 IMPORATNT NOTE: memory access MUST be naturally aligned except
376 SLJIT_UNALIGNED macro is defined and its value is 1.
377
378 length | alignment
379 ---------+-----------
380 byte | 1 byte (not aligned)
381 half | 2 byte (real_address & 0x1 == 0)
382 int | 4 byte (real_address & 0x3 == 0)
383 sljit_w | 4 byte if SLJIT_32BIT_ARCHITECTURE is defined and its value is 1
384 | 8 byte if SLJIT_64BIT_ARCHITECTURE is defined and its value is 1
385
386 Note: different architectures have different addressing limitations
387 Thus sljit may generate several instructions for other addressing modes
388 x86: all addressing modes supported, but write-back is not supported
389 (requires an extra instruction). On x86-64 only 32 bit signed
390 integers are supported by the architecture.
391 arm: [reg+imm] supported for small immediates (-4095 <= imm <= 4095
392 or -255 <= imm <= 255 for loading signed bytes, any halfs or doubles)
393 [reg+(reg<<imm)] are supported or requires only two instructions
394 Write back is limited to small immediates on thumb2
395 ppc: [reg+imm], -65535 <= imm <= 65535. 64 bit moves requires immediates
396 divisible by 4. [reg+reg] supported, write-back supported
397 [reg+(reg<<imm)] (imm != 0) is cheap (requires two instructions)
398 */
399
400 /* Register output: simply the name of the register.
401 For destination, you can use SLJIT_UNUSED as well. */
402 #define SLJIT_MEM 0x100
403 #define SLJIT_MEM0() (SLJIT_MEM)
404 #define SLJIT_MEM1(r1) (SLJIT_MEM | (r1))
405 #define SLJIT_MEM2(r1, r2) (SLJIT_MEM | (r1) | ((r2) << 4))
406 #define SLJIT_IMM 0x200
407
408 /* Set 32 bit operation mode (I) on 64 bit CPUs. The flag is totally ignored on
409 32 bit CPUs. The arithmetic instruction uses only the lower 32 bit of the
410 input register(s), and set the flags according to the 32 bit result. If the
411 destination is a register, the higher 32 bit of the result is undefined.
412 The addressing modes (SLJIT_MEM1/SLJIT_MEM2 macros) are unaffected by this flag. */
413 #define SLJIT_INT_OP 0x100
414
415 /* Common CPU status flags for all architectures (x86, ARM, PPC)
416 - carry flag
417 - overflow flag
418 - zero flag
419 - negative/positive flag (depends on arc)
420 On mips, these flags are emulated by software. */
421
422 /* By default, the instructions may, or may not set the CPU status flags.
423 Forcing to set or keep status flags can be done with the following flags: */
424
425 /* Note: sljit tries to emit the minimum number of instructions. Using these
426 flags can increase them, so use them wisely to avoid unnecessary code generation. */
427
428 /* Set Equal (Zero) status flag (E). */
429 #define SLJIT_SET_E 0x0200
430 /* Set signed status flag (S). */
431 #define SLJIT_SET_S 0x0400
432 /* Set unsgined status flag (U). */
433 #define SLJIT_SET_U 0x0800
434 /* Set signed overflow flag (O). */
435 #define SLJIT_SET_O 0x1000
436 /* Set carry flag (C).
437 Note: Kinda unsigned overflow, but behaves differently on various cpus. */
438 #define SLJIT_SET_C 0x2000
439 /* Do not modify the flags (K).
440 Note: This flag cannot be combined with any other SLJIT_SET_* flag. */
441 #define SLJIT_KEEP_FLAGS 0x4000
442
443 /* Notes:
444 - you cannot postpone conditional jump instructions except if noted that
445 the instruction does not set flags (See: SLJIT_KEEP_FLAGS).
446 - flag combinations: '|' means 'logical or'. */
447
448 /* Flags: - (never set any flags)
449 Note: breakpoint instruction is not supported by all architectures (namely ppc)
450 It falls back to SLJIT_NOP in those cases. */
451 #define SLJIT_BREAKPOINT 0
452 /* Flags: - (never set any flags)
453 Note: may or may not cause an extra cycle wait
454 it can even decrease the runtime in a few cases. */
455 #define SLJIT_NOP 1
456 /* Flags: may destroy flags
457 Unsigned multiplication of SLJIT_TEMPORARY_REG1 and SLJIT_TEMPORARY_REG2.
458 Result goes to SLJIT_TEMPORARY_REG2:SLJIT_TEMPORARY_REG1 (high:low) word */
459 #define SLJIT_UMUL 2
460 /* Flags: may destroy flags
461 Signed multiplication of SLJIT_TEMPORARY_REG1 and SLJIT_TEMPORARY_REG2.
462 Result goes to SLJIT_TEMPORARY_REG2:SLJIT_TEMPORARY_REG1 (high:low) word */
463 #define SLJIT_SMUL 3
464 /* Flags: I | may destroy flags
465 Unsigned divide of the value in SLJIT_TEMPORARY_REG1 by the value in SLJIT_TEMPORARY_REG2.
466 The result is placed in SLJIT_TEMPORARY_REG1 and the remainder goes to SLJIT_TEMPORARY_REG2.
467 Note: if SLJIT_TEMPORARY_REG2 contains 0, the behaviour is undefined. */
468 #define SLJIT_UDIV 4
469 /* Flags: I | may destroy flags
470 Signed divide of the value in SLJIT_TEMPORARY_REG1 by the value in SLJIT_TEMPORARY_REG2.
471 The result is placed in SLJIT_TEMPORARY_REG1 and the remainder goes to SLJIT_TEMPORARY_REG2.
472 Note: if SLJIT_TEMPORARY_REG2 contains 0, the behaviour is undefined. */
473 #define SLJIT_SDIV 5
474
475 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op0(struct sljit_compiler *compiler, int op);
476
477 /* Notes for MOV instructions:
478 U = Mov with update (post form). If source or destination defined as SLJIT_MEM1(r1)
479 or SLJIT_MEM2(r1, r2), r1 is increased by the sum of r2 and the constant argument
480 UB = unsigned byte (8 bit)
481 SB = signed byte (8 bit)
482 UH = unsgined half (16 bit)
483 SH = unsgined half (16 bit) */
484
485 /* Flags: - (never set any flags) */
486 #define SLJIT_MOV 6
487 /* Flags: - (never set any flags) */
488 #define SLJIT_MOV_UB 7
489 /* Flags: - (never set any flags) */
490 #define SLJIT_MOV_SB 8
491 /* Flags: - (never set any flags) */
492 #define SLJIT_MOV_UH 9
493 /* Flags: - (never set any flags) */
494 #define SLJIT_MOV_SH 10
495 /* Flags: - (never set any flags) */
496 #define SLJIT_MOV_UI 11
497 /* Flags: - (never set any flags) */
498 #define SLJIT_MOV_SI 12
499 /* Flags: - (never set any flags) */
500 #define SLJIT_MOVU 13
501 /* Flags: - (never set any flags) */
502 #define SLJIT_MOVU_UB 14
503 /* Flags: - (never set any flags) */
504 #define SLJIT_MOVU_SB 15
505 /* Flags: - (never set any flags) */
506 #define SLJIT_MOVU_UH 16
507 /* Flags: - (never set any flags) */
508 #define SLJIT_MOVU_SH 17
509 /* Flags: - (never set any flags) */
510 #define SLJIT_MOVU_UI 18
511 /* Flags: - (never set any flags) */
512 #define SLJIT_MOVU_SI 19
513 /* Flags: I | E | K */
514 #define SLJIT_NOT 20
515 /* Flags: I | E | O | K */
516 #define SLJIT_NEG 21
517 /* Count leading zeroes
518 Flags: I | E | K */
519 #define SLJIT_CLZ 22
520
521 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op1(struct sljit_compiler *compiler, int op,
522 int dst, sljit_w dstw,
523 int src, sljit_w srcw);
524
525 /* Flags: I | E | O | C | K */
526 #define SLJIT_ADD 23
527 /* Flags: I | C | K */
528 #define SLJIT_ADDC 24
529 /* Flags: I | E | S | U | O | C | K */
530 #define SLJIT_SUB 25
531 /* Flags: I | C | K */
532 #define SLJIT_SUBC 26
533 /* Note: integer mul */
534 /* Flags: I | O (see SLJIT_C_MUL_*) | K */
535 #define SLJIT_MUL 27
536 /* Flags: I | E | K */
537 #define SLJIT_AND 28
538 /* Flags: I | E | K */
539 #define SLJIT_OR 29
540 /* Flags: I | E | K */
541 #define SLJIT_XOR 30
542 /* Flags: I | E | K */
543 #define SLJIT_SHL 31
544 /* Flags: I | E | K */
545 #define SLJIT_LSHR 32
546 /* Flags: I | E | K */
547 #define SLJIT_ASHR 33
548
549 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op2(struct sljit_compiler *compiler, int op,
550 int dst, sljit_w dstw,
551 int src1, sljit_w src1w,
552 int src2, sljit_w src2w);
553
554 /* The following function is a helper function for sljit_emit_op_custom.
555 It returns with the real machine register index of any SLJIT_TEMPORARY
556 SLJIT_GENERAL or SLJIT_LOCALS register.
557 Note: it returns with -1 for virtual registers (all EREGs on x86-32).
558 Note: register returned by SLJIT_LOCALS_REG is not necessary the real
559 stack pointer register of the target architecture. */
560
561 SLJIT_API_FUNC_ATTRIBUTE int sljit_get_register_index(int reg);
562
563 /* Any instruction can be inserted into the instruction stream by
564 sljit_emit_op_custom. It has a similar purpose as inline assembly.
565 The size parameter must match to the instruction size of the target
566 architecture:
567
568 x86: 0 < size <= 15. The instruction argument can be byte aligned.
569 Thumb2: if size == 2, the instruction argument must be 2 byte aligned.
570 if size == 4, the instruction argument must be 4 byte aligned.
571 Otherwise: size must be 4 and instruction argument must be 4 byte aligned. */
572
573 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op_custom(struct sljit_compiler *compiler,
574 void *instruction, int size);
575
576 /* Returns with non-zero if fpu is available. */
577
578 SLJIT_API_FUNC_ATTRIBUTE int sljit_is_fpu_available(void);
579
580 /* Note: dst is the left and src is the right operand for SLJIT_FCMP.
581 Note: NaN check is always performed. If SLJIT_C_FLOAT_NAN is set,
582 the comparison result is unpredictable.
583 Flags: E | S (see SLJIT_C_FLOAT_*) */
584 #define SLJIT_FCMP 34
585 /* Flags: - (never set any flags) */
586 #define SLJIT_FMOV 35
587 /* Flags: - (never set any flags) */
588 #define SLJIT_FNEG 36
589 /* Flags: - (never set any flags) */
590 #define SLJIT_FABS 37
591
592 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fop1(struct sljit_compiler *compiler, int op,
593 int dst, sljit_w dstw,
594 int src, sljit_w srcw);
595
596 /* Flags: - (never set any flags) */
597 #define SLJIT_FADD 38
598 /* Flags: - (never set any flags) */
599 #define SLJIT_FSUB 39
600 /* Flags: - (never set any flags) */
601 #define SLJIT_FMUL 40
602 /* Flags: - (never set any flags) */
603 #define SLJIT_FDIV 41
604
605 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fop2(struct sljit_compiler *compiler, int op,
606 int dst, sljit_w dstw,
607 int src1, sljit_w src1w,
608 int src2, sljit_w src2w);
609
610 /* Label and jump instructions. */
611
612 SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler);
613
614 /* Invert conditional instruction: xor (^) with 0x1 */
615 #define SLJIT_C_EQUAL 0
616 #define SLJIT_C_ZERO 0
617 #define SLJIT_C_NOT_EQUAL 1
618 #define SLJIT_C_NOT_ZERO 1
619
620 #define SLJIT_C_LESS 2
621 #define SLJIT_C_GREATER_EQUAL 3
622 #define SLJIT_C_GREATER 4
623 #define SLJIT_C_LESS_EQUAL 5
624 #define SLJIT_C_SIG_LESS 6
625 #define SLJIT_C_SIG_GREATER_EQUAL 7
626 #define SLJIT_C_SIG_GREATER 8
627 #define SLJIT_C_SIG_LESS_EQUAL 9
628
629 #define SLJIT_C_OVERFLOW 10
630 #define SLJIT_C_NOT_OVERFLOW 11
631
632 #define SLJIT_C_MUL_OVERFLOW 12
633 #define SLJIT_C_MUL_NOT_OVERFLOW 13
634
635 #define SLJIT_C_FLOAT_EQUAL 14
636 #define SLJIT_C_FLOAT_NOT_EQUAL 15
637 #define SLJIT_C_FLOAT_LESS 16
638 #define SLJIT_C_FLOAT_GREATER_EQUAL 17
639 #define SLJIT_C_FLOAT_GREATER 18
640 #define SLJIT_C_FLOAT_LESS_EQUAL 19
641 #define SLJIT_C_FLOAT_NAN 20
642 #define SLJIT_C_FLOAT_NOT_NAN 21
643
644 #define SLJIT_JUMP 22
645 #define SLJIT_FAST_CALL 23
646 #define SLJIT_CALL0 24
647 #define SLJIT_CALL1 25
648 #define SLJIT_CALL2 26
649 #define SLJIT_CALL3 27
650
651 /* Fast calling method. See sljit_emit_fast_enter / sljit_emit_fast_return. */
652
653 /* The target can be changed during runtime (see: sljit_set_jump_addr). */
654 #define SLJIT_REWRITABLE_JUMP 0x1000
655
656 /* Emit a jump instruction. The destination is not set, only the type of the jump.
657 type must be between SLJIT_C_EQUAL and SLJIT_CALL3
658 type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP
659 Flags: - (never set any flags) for both conditional and unconditional jumps.
660 Flags: destroy all flags for calls. */
661 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, int type);
662
663 /* Basic arithmetic comparison. In most architectures it is equal to
664 an SLJIT_SUB operation (with SLJIT_UNUSED destination) followed by a
665 sljit_emit_jump. However some architectures (i.e: MIPS) may employ
666 special optimizations here. It is suggested to use this comparison
667 form when flags are unimportant.
668 type must be between SLJIT_C_EQUAL and SLJIT_C_SIG_LESS_EQUAL
669 type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP or SLJIT_INT_OP
670 Flags: destroy flags. */
671 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_cmp(struct sljit_compiler *compiler, int type,
672 int src1, sljit_w src1w,
673 int src2, sljit_w src2w);
674
675 /* Set the destination of the jump to this label. */
676 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_label(struct sljit_jump *jump, struct sljit_label* label);
677 /* Only for jumps defined with SLJIT_REWRITABLE_JUMP flag.
678 Note: use sljit_emit_ijump for fixed jumps. */
679 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_target(struct sljit_jump *jump, sljit_uw target);
680
681 /* Call function or jump anywhere. Both direct and indirect form
682 type must be between SLJIT_JUMP and SLJIT_CALL3
683 Direct form: set src to SLJIT_IMM() and srcw to the address
684 Indirect form: any other valid addressing mode
685 Flags: - (never set any flags) for unconditional jumps.
686 Flags: destroy all flags for calls. */
687 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_ijump(struct sljit_compiler *compiler, int type, int src, sljit_w srcw);
688
689 /* If op == SLJIT_MOV:
690 Set dst to 1 if condition is fulfilled, 0 otherwise
691 type must be between SLJIT_C_EQUAL and SLJIT_C_FLOAT_NOT_NAN
692 Flags: - (never set any flags)
693 If op == SLJIT_OR
694 Dst is used as src as well, and set its lowest bit to 1 if
695 the condition is fulfilled. Otherwise it does nothing.
696 Flags: E | K
697 Note: sljit_emit_cond_value does nothing, if dst is SLJIT_UNUSED (regardless of op). */
698 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_cond_value(struct sljit_compiler *compiler, int op, int dst, sljit_w dstw, int type);
699
700 /* The constant can be changed runtime (see: sljit_set_const)
701 Flags: - (never set any flags) */
702 SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, int dst, sljit_w dstw, sljit_w init_value);
703
704 /* After the code generation the address for label, jump and const instructions
705 are computed. Since these structures are freed sljit_free_compiler, the
706 addresses must be preserved by the user program elsewere. */
707 static SLJIT_INLINE sljit_uw sljit_get_label_addr(struct sljit_label *label) { return label->addr; }
708 static SLJIT_INLINE sljit_uw sljit_get_jump_addr(struct sljit_jump *jump) { return jump->addr; }
709 static SLJIT_INLINE sljit_uw sljit_get_const_addr(struct sljit_const *const_) { return const_->addr; }
710
711 /* Only the address is required to rewrite the code. */
712 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr);
713 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_w new_constant);
714
715 /* --------------------------------------------------------------------- */
716 /* Miscellaneous utility functions */
717 /* --------------------------------------------------------------------- */
718
719 #define SLJIT_MAJOR_VERSION 0
720 #define SLJIT_MINOR_VERSION 82
721
722 /* Get the human readable name of the platfrom.
723 Can be useful for debugging on platforms like ARM, where ARM and
724 Thumb2 functions can be mixed. */
725 SLJIT_API_FUNC_ATTRIBUTE SLJIT_CONST char* sljit_get_platform_name(void);
726
727 /* Portble helper function to get an offset of a member. */
728 #define SLJIT_OFFSETOF(base, member) ((sljit_w)(&((base*)0x10)->member) - 0x10)
729
730 #if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK)
731 /* This global lock is useful to compile common functions. */
732 SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void);
733 SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void);
734 #endif
735
736 #if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK)
737
738 /* The sljit_stack is a utiliy feature of sljit, which allocates a
739 writable memory region between base (inclusive) and limit (exclusive).
740 Both base and limit is a pointer, and base is always <= than limit.
741 This feature uses the "address space reserve" feature
742 of modern operating systems. Basically we don't need to allocate a
743 huge memory block in one step for the worst case, we can start with
744 a smaller chunk and extend it later. Since the address space is
745 reserved, the data never copied to other regions, thus it is safe
746 to store pointers here. */
747
748 /* Note: The base field is aligned to PAGE_SIZE bytes (usually 4k or more).
749 Note: stack growing should not happen in small steps: 4k, 16k or even
750 bigger growth is better.
751 Note: this structure may not be supported by all operating systems.
752 Some kind of fallback mechanism is suggested when SLJIT_UTIL_STACK
753 is not defined. */
754
755 struct sljit_stack {
756 /* User data, anything can be stored here.
757 Starting with the same value as base. */
758 sljit_uw top;
759 /* These members are read only. */
760 sljit_uw base;
761 sljit_uw limit;
762 sljit_uw max_limit;
763 };
764
765 /* Returns NULL if unsuccessful.
766 Note: limit and max_limit contains the size for stack allocation
767 Note: the top field is initialized to base. */
768 SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(sljit_uw limit, sljit_uw max_limit);
769 SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_free_stack(struct sljit_stack* stack);
770
771 /* Can be used to increase (allocate) or decrease (free) the memory area.
772 Returns with a non-zero value if unsuccessful. If new_limit is greater than
773 max_limit, it will fail. It is very easy to implement a stack data structure,
774 since the growth ratio can be added to the current limit, and sljit_stack_resize
775 will do all the necessary checks. The fields of the stack are not changed if
776 sljit_stack_resize fails. */
777 SLJIT_API_FUNC_ATTRIBUTE sljit_w SLJIT_CALL sljit_stack_resize(struct sljit_stack* stack, sljit_uw new_limit);
778
779 #endif /* (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) */
780
781 #if !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL)
782
783 /* Get the entry address of a given function. */
784 #define SLJIT_FUNC_OFFSET(func_name) ((sljit_w)func_name)
785
786 #else /* !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) */
787
788 /* All JIT related code should be placed in the same context (library, binary, etc.). */
789
790 #define SLJIT_FUNC_OFFSET(func_name) ((sljit_w)*(void**)func_name)
791
792 /* For powerpc64, the function pointers point to a context descriptor. */
793 struct sljit_function_context {
794 sljit_w addr;
795 sljit_w r2;
796 sljit_w r11;
797 };
798
799 /* Fill the context arguments using the addr and the function.
800 If func_ptr is NULL, it will not be set to the address of context
801 If addr is NULL, the function address also comes from the func pointer. */
802 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_function_context(void** func_ptr, struct sljit_function_context* context, sljit_w addr, void* func);
803
804 #endif /* !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) */
805
806 #endif /* _SLJIT_LIR_H_ */

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