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, max 3+2 saved and 4 floating point registers)
48: In practice:
49: - This approach is very effective for interpreters
50: - One of the saved 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: /* Saved registers whose preserve their values across function calls. */
108: #define SLJIT_SAVED_REG1 6
109: #define SLJIT_SAVED_REG2 7
110: #define SLJIT_SAVED_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_SAVED_EREG1 9
114: #define SLJIT_SAVED_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 saved registers. */
200: int saveds;
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 saveds_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: /* Other members. */
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: The executable code is basically a function call from the viewpoint of
316: the C language. The function calls must obey to the ABI (Application
317: Binary Interface) of the platform, which specify the purpose of machine
318: registers and stack handling among other things. The sljit_emit_enter
319: function emits the necessary instructions for setting up a new context
320: for the executable code and moves function arguments to the saved
321: registers. The number of arguments are specified in the "args"
322: parameter and the first argument goes to SLJIT_SAVED_REG1, the second
323: goes to SLJIT_SAVED_REG2 and so on. The number of temporary and
324: saved registers are passed in "temporaries" and "saveds" arguments
325: respectively. Since the saved registers contains the arguments,
326: "args" must be less or equal than "saveds". The sljit_emit_enter
327: is also capable of allocating a stack space for local variables. The
328: "local_size" argument contains the size in bytes of this local area
329: and its staring address is stored in SLJIT_LOCALS_REG. However
330: the SLJIT_LOCALS_REG is not necessary the machine stack pointer.
331: The memory bytes between SLJIT_LOCALS_REG (inclusive) and
332: SLJIT_LOCALS_REG + local_size (exclusive) can be modified freely
333: until the function returns. The stack space is uninitialized.
334:
335: Note: every call of sljit_emit_enter and sljit_set_context overwrites
336: the previous context. */
337:
338: #define SLJIT_MAX_LOCAL_SIZE 65536
339:
340: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_enter(struct sljit_compiler *compiler,
341: int args, int temporaries, int saveds, int local_size);
342:
343: /* The machine code has a context (which contains the local stack space size,
344: number of used registers, etc.) which initialized by sljit_emit_enter. Several
345: functions (like sljit_emit_return) requres this context to be able to generate
346: the appropriate code. However, some code fragments (like inline cache) may have
347: no normal entry point so their context is unknown for the compiler. Using the
348: function below we can specify thir context.
349:
350: Note: every call of sljit_emit_enter and sljit_set_context overwrites
351: the previous context. */
352:
353: /* Note: multiple calls of this function overwrites the previous call. */
354:
355: SLJIT_API_FUNC_ATTRIBUTE void sljit_set_context(struct sljit_compiler *compiler,
356: int args, int temporaries, int saveds, int local_size);
357:
358: /* Return from machine code. The op argument can be SLJIT_UNUSED which means the
359: function does not return with anything or any opcode between SLJIT_MOV and
360: SLJIT_MOV_SI (see sljit_emit_op1). As for src and srcw they must be 0 if op
361: is SLJIT_UNUSED, otherwise see below the description about source and
362: destination arguments. */
363: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_return(struct sljit_compiler *compiler, int op,
364: int src, sljit_w srcw);
365:
366: /* Really fast calling method for utility functions inside sljit (see SLJIT_FAST_CALL).
367: All registers and even the stack frame is passed to the callee. The return address is
368: preserved in dst/dstw by sljit_emit_fast_enter, and sljit_emit_fast_return can
369: use this as a return value later. */
370:
371: /* Note: only for sljit specific, non ABI compilant calls. Fast, since only a few machine instructions
372: are needed. Excellent for small uility functions, where saving registers and setting up
373: a new stack frame would cost too much performance. However, it is still possible to return
374: to the address of the caller (or anywhere else). */
375:
376: /* Note: flags are not changed (unlike sljit_emit_enter / sljit_emit_return). */
377:
378: /* Note: although sljit_emit_fast_return could be replaced by an ijump, it is not suggested,
379: since many architectures do clever branch prediction on call / return instruction pairs. */
380:
381: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_enter(struct sljit_compiler *compiler, int dst, sljit_w dstw, int args, int temporaries, int saveds, int local_size);
382: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_return(struct sljit_compiler *compiler, int src, sljit_w srcw);
383:
384: /*
385: Source and destination values for arithmetical instructions
386: imm - a simple immediate value (cannot be used as a destination)
387: reg - any of the registers (immediate argument must be 0)
388: [imm] - absolute immediate memory address
389: [reg+imm] - indirect memory address
390: [reg+(reg<<imm)] - indirect indexed memory address (shift must be between 0 and 3)
391: useful for (byte, half, int, sljit_w) array access
392: (fully supported by both x86 and ARM architectures, and cheap operation on others)
393: */
394:
395: /*
396: IMPORATNT NOTE: memory access MUST be naturally aligned except
397: SLJIT_UNALIGNED macro is defined and its value is 1.
398:
399: length | alignment
400: ---------+-----------
401: byte | 1 byte (not aligned)
402: half | 2 byte (real_address & 0x1 == 0)
403: int | 4 byte (real_address & 0x3 == 0)
404: sljit_w | 4 byte if SLJIT_32BIT_ARCHITECTURE is defined and its value is 1
405: | 8 byte if SLJIT_64BIT_ARCHITECTURE is defined and its value is 1
406:
407: Note: different architectures have different addressing limitations
408: Thus sljit may generate several instructions for other addressing modes
409: x86: all addressing modes supported, but write-back is not supported
410: (requires an extra instruction). On x86-64 only 32 bit signed
411: integers are supported by the architecture.
412: arm: [reg+imm] supported for small immediates (-4095 <= imm <= 4095
413: or -255 <= imm <= 255 for loading signed bytes, any halfs or doubles)
414: [reg+(reg<<imm)] are supported or requires only two instructions
415: Write back is limited to small immediates on thumb2
416: ppc: [reg+imm], -65535 <= imm <= 65535. 64 bit moves requires immediates
417: divisible by 4. [reg+reg] supported, write-back supported
418: [reg+(reg<<imm)] (imm != 0) is cheap (requires two instructions)
419: */
420:
421: /* Register output: simply the name of the register.
422: For destination, you can use SLJIT_UNUSED as well. */
423: #define SLJIT_MEM 0x100
424: #define SLJIT_MEM0() (SLJIT_MEM)
425: #define SLJIT_MEM1(r1) (SLJIT_MEM | (r1))
426: #define SLJIT_MEM2(r1, r2) (SLJIT_MEM | (r1) | ((r2) << 4))
427: #define SLJIT_IMM 0x200
428:
429: /* Set 32 bit operation mode (I) on 64 bit CPUs. The flag is totally ignored on
430: 32 bit CPUs. The arithmetic instruction uses only the lower 32 bit of the
431: input register(s), and set the flags according to the 32 bit result. If the
432: destination is a register, the higher 32 bit of the result is undefined.
433: The addressing modes (SLJIT_MEM1/SLJIT_MEM2 macros) are unaffected by this flag. */
434: #define SLJIT_INT_OP 0x100
435:
436: /* Common CPU status flags for all architectures (x86, ARM, PPC)
437: - carry flag
438: - overflow flag
439: - zero flag
440: - negative/positive flag (depends on arc)
441: On mips, these flags are emulated by software. */
442:
443: /* By default, the instructions may, or may not set the CPU status flags.
444: Forcing to set or keep status flags can be done with the following flags: */
445:
446: /* Note: sljit tries to emit the minimum number of instructions. Using these
447: flags can increase them, so use them wisely to avoid unnecessary code generation. */
448:
449: /* Set Equal (Zero) status flag (E). */
450: #define SLJIT_SET_E 0x0200
451: /* Set signed status flag (S). */
452: #define SLJIT_SET_S 0x0400
453: /* Set unsgined status flag (U). */
454: #define SLJIT_SET_U 0x0800
455: /* Set signed overflow flag (O). */
456: #define SLJIT_SET_O 0x1000
457: /* Set carry flag (C).
458: Note: Kinda unsigned overflow, but behaves differently on various cpus. */
459: #define SLJIT_SET_C 0x2000
460: /* Do not modify the flags (K).
461: Note: This flag cannot be combined with any other SLJIT_SET_* flag. */
462: #define SLJIT_KEEP_FLAGS 0x4000
463:
464: /* Notes:
465: - you cannot postpone conditional jump instructions except if noted that
466: the instruction does not set flags (See: SLJIT_KEEP_FLAGS).
467: - flag combinations: '|' means 'logical or'. */
468:
469: /* Flags: - (never set any flags)
470: Note: breakpoint instruction is not supported by all architectures (namely ppc)
471: It falls back to SLJIT_NOP in those cases. */
472: #define SLJIT_BREAKPOINT 0
473: /* Flags: - (never set any flags)
474: Note: may or may not cause an extra cycle wait
475: it can even decrease the runtime in a few cases. */
476: #define SLJIT_NOP 1
477: /* Flags: may destroy flags
478: Unsigned multiplication of SLJIT_TEMPORARY_REG1 and SLJIT_TEMPORARY_REG2.
479: Result goes to SLJIT_TEMPORARY_REG2:SLJIT_TEMPORARY_REG1 (high:low) word */
480: #define SLJIT_UMUL 2
481: /* Flags: may destroy flags
482: Signed multiplication of SLJIT_TEMPORARY_REG1 and SLJIT_TEMPORARY_REG2.
483: Result goes to SLJIT_TEMPORARY_REG2:SLJIT_TEMPORARY_REG1 (high:low) word */
484: #define SLJIT_SMUL 3
485: /* Flags: I | may destroy flags
486: Unsigned divide of the value in SLJIT_TEMPORARY_REG1 by the value in SLJIT_TEMPORARY_REG2.
487: The result is placed in SLJIT_TEMPORARY_REG1 and the remainder goes to SLJIT_TEMPORARY_REG2.
488: Note: if SLJIT_TEMPORARY_REG2 contains 0, the behaviour is undefined. */
489: #define SLJIT_UDIV 4
490: /* Flags: I | may destroy flags
491: Signed divide of the value in SLJIT_TEMPORARY_REG1 by the value in SLJIT_TEMPORARY_REG2.
492: The result is placed in SLJIT_TEMPORARY_REG1 and the remainder goes to SLJIT_TEMPORARY_REG2.
493: Note: if SLJIT_TEMPORARY_REG2 contains 0, the behaviour is undefined. */
494: #define SLJIT_SDIV 5
495:
496: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op0(struct sljit_compiler *compiler, int op);
497:
498: /* Notes for MOV instructions:
499: U = Mov with update (post form). If source or destination defined as SLJIT_MEM1(r1)
500: or SLJIT_MEM2(r1, r2), r1 is increased by the sum of r2 and the constant argument
501: UB = unsigned byte (8 bit)
502: SB = signed byte (8 bit)
503: UH = unsgined half (16 bit)
504: SH = unsgined half (16 bit) */
505:
506: /* Flags: - (never set any flags) */
507: #define SLJIT_MOV 6
508: /* Flags: - (never set any flags) */
509: #define SLJIT_MOV_UB 7
510: /* Flags: - (never set any flags) */
511: #define SLJIT_MOV_SB 8
512: /* Flags: - (never set any flags) */
513: #define SLJIT_MOV_UH 9
514: /* Flags: - (never set any flags) */
515: #define SLJIT_MOV_SH 10
516: /* Flags: - (never set any flags) */
517: #define SLJIT_MOV_UI 11
518: /* Flags: - (never set any flags) */
519: #define SLJIT_MOV_SI 12
520: /* Flags: - (never set any flags) */
521: #define SLJIT_MOVU 13
522: /* Flags: - (never set any flags) */
523: #define SLJIT_MOVU_UB 14
524: /* Flags: - (never set any flags) */
525: #define SLJIT_MOVU_SB 15
526: /* Flags: - (never set any flags) */
527: #define SLJIT_MOVU_UH 16
528: /* Flags: - (never set any flags) */
529: #define SLJIT_MOVU_SH 17
530: /* Flags: - (never set any flags) */
531: #define SLJIT_MOVU_UI 18
532: /* Flags: - (never set any flags) */
533: #define SLJIT_MOVU_SI 19
534: /* Flags: I | E | K */
535: #define SLJIT_NOT 20
536: /* Flags: I | E | O | K */
537: #define SLJIT_NEG 21
538: /* Count leading zeroes
539: Flags: I | E | K */
540: #define SLJIT_CLZ 22
541:
542: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op1(struct sljit_compiler *compiler, int op,
543: int dst, sljit_w dstw,
544: int src, sljit_w srcw);
545:
546: /* Flags: I | E | O | C | K */
547: #define SLJIT_ADD 23
548: /* Flags: I | C | K */
549: #define SLJIT_ADDC 24
550: /* Flags: I | E | S | U | O | C | K */
551: #define SLJIT_SUB 25
552: /* Flags: I | C | K */
553: #define SLJIT_SUBC 26
554: /* Note: integer mul
555: Flags: I | O (see SLJIT_C_MUL_*) | K */
556: #define SLJIT_MUL 27
557: /* Flags: I | E | K */
558: #define SLJIT_AND 28
559: /* Flags: I | E | K */
560: #define SLJIT_OR 29
561: /* Flags: I | E | K */
562: #define SLJIT_XOR 30
563: /* Flags: I | E | K
564: Let bit_length be the length of the shift operation: 32 or 64.
565: If src2 is immediate, src2w is masked by (bit_length - 1).
566: Otherwise, if the content of src2 is outside the range from 0
567: to bit_length - 1, the operation is undefined. */
568: #define SLJIT_SHL 31
569: /* Flags: I | E | K
570: Let bit_length be the length of the shift operation: 32 or 64.
571: If src2 is immediate, src2w is masked by (bit_length - 1).
572: Otherwise, if the content of src2 is outside the range from 0
573: to bit_length - 1, the operation is undefined. */
574: #define SLJIT_LSHR 32
575: /* Flags: I | E | K
576: Let bit_length be the length of the shift operation: 32 or 64.
577: If src2 is immediate, src2w is masked by (bit_length - 1).
578: Otherwise, if the content of src2 is outside the range from 0
579: to bit_length - 1, the operation is undefined. */
580: #define SLJIT_ASHR 33
581:
582: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op2(struct sljit_compiler *compiler, int op,
583: int dst, sljit_w dstw,
584: int src1, sljit_w src1w,
585: int src2, sljit_w src2w);
586:
587: /* The following function is a helper function for sljit_emit_op_custom.
588: It returns with the real machine register index of any SLJIT_TEMPORARY
589: SLJIT_SAVED or SLJIT_LOCALS register.
590: Note: it returns with -1 for virtual registers (all EREGs on x86-32).
591: Note: register returned by SLJIT_LOCALS_REG is not necessary the real
592: stack pointer register of the target architecture. */
593:
594: SLJIT_API_FUNC_ATTRIBUTE int sljit_get_register_index(int reg);
595:
596: /* Any instruction can be inserted into the instruction stream by
597: sljit_emit_op_custom. It has a similar purpose as inline assembly.
598: The size parameter must match to the instruction size of the target
599: architecture:
600:
601: x86: 0 < size <= 15. The instruction argument can be byte aligned.
602: Thumb2: if size == 2, the instruction argument must be 2 byte aligned.
603: if size == 4, the instruction argument must be 4 byte aligned.
604: Otherwise: size must be 4 and instruction argument must be 4 byte aligned. */
605:
606: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_op_custom(struct sljit_compiler *compiler,
607: void *instruction, int size);
608:
609: /* Returns with non-zero if fpu is available. */
610:
611: SLJIT_API_FUNC_ATTRIBUTE int sljit_is_fpu_available(void);
612:
613: /* Note: dst is the left and src is the right operand for SLJIT_FCMP.
614: Note: NaN check is always performed. If SLJIT_C_FLOAT_NAN is set,
615: the comparison result is unpredictable.
616: Flags: E | S (see SLJIT_C_FLOAT_*) */
617: #define SLJIT_FCMP 34
618: /* Flags: - (never set any flags) */
619: #define SLJIT_FMOV 35
620: /* Flags: - (never set any flags) */
621: #define SLJIT_FNEG 36
622: /* Flags: - (never set any flags) */
623: #define SLJIT_FABS 37
624:
625: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fop1(struct sljit_compiler *compiler, int op,
626: int dst, sljit_w dstw,
627: int src, sljit_w srcw);
628:
629: /* Flags: - (never set any flags) */
630: #define SLJIT_FADD 38
631: /* Flags: - (never set any flags) */
632: #define SLJIT_FSUB 39
633: /* Flags: - (never set any flags) */
634: #define SLJIT_FMUL 40
635: /* Flags: - (never set any flags) */
636: #define SLJIT_FDIV 41
637:
638: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fop2(struct sljit_compiler *compiler, int op,
639: int dst, sljit_w dstw,
640: int src1, sljit_w src1w,
641: int src2, sljit_w src2w);
642:
643: /* Label and jump instructions. */
644:
645: SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler);
646:
647: /* Invert conditional instruction: xor (^) with 0x1 */
648: #define SLJIT_C_EQUAL 0
649: #define SLJIT_C_ZERO 0
650: #define SLJIT_C_NOT_EQUAL 1
651: #define SLJIT_C_NOT_ZERO 1
652:
653: #define SLJIT_C_LESS 2
654: #define SLJIT_C_GREATER_EQUAL 3
655: #define SLJIT_C_GREATER 4
656: #define SLJIT_C_LESS_EQUAL 5
657: #define SLJIT_C_SIG_LESS 6
658: #define SLJIT_C_SIG_GREATER_EQUAL 7
659: #define SLJIT_C_SIG_GREATER 8
660: #define SLJIT_C_SIG_LESS_EQUAL 9
661:
662: #define SLJIT_C_OVERFLOW 10
663: #define SLJIT_C_NOT_OVERFLOW 11
664:
665: #define SLJIT_C_MUL_OVERFLOW 12
666: #define SLJIT_C_MUL_NOT_OVERFLOW 13
667:
668: #define SLJIT_C_FLOAT_EQUAL 14
669: #define SLJIT_C_FLOAT_NOT_EQUAL 15
670: #define SLJIT_C_FLOAT_LESS 16
671: #define SLJIT_C_FLOAT_GREATER_EQUAL 17
672: #define SLJIT_C_FLOAT_GREATER 18
673: #define SLJIT_C_FLOAT_LESS_EQUAL 19
674: #define SLJIT_C_FLOAT_NAN 20
675: #define SLJIT_C_FLOAT_NOT_NAN 21
676:
677: #define SLJIT_JUMP 22
678: #define SLJIT_FAST_CALL 23
679: #define SLJIT_CALL0 24
680: #define SLJIT_CALL1 25
681: #define SLJIT_CALL2 26
682: #define SLJIT_CALL3 27
683:
684: /* Fast calling method. See sljit_emit_fast_enter / sljit_emit_fast_return. */
685:
686: /* The target can be changed during runtime (see: sljit_set_jump_addr). */
687: #define SLJIT_REWRITABLE_JUMP 0x1000
688:
689: /* Emit a jump instruction. The destination is not set, only the type of the jump.
690: type must be between SLJIT_C_EQUAL and SLJIT_CALL3
691: type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP
692: Flags: - (never set any flags) for both conditional and unconditional jumps.
693: Flags: destroy all flags for calls. */
694: SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, int type);
695:
696: /* Basic arithmetic comparison. In most architectures it is implemented as
697: an SLJIT_SUB operation (with SLJIT_UNUSED destination and setting
698: appropriate flags) followed by a sljit_emit_jump. However some
699: architectures (i.e: MIPS) may employ special optimizations here. It is
700: suggested to use this comparison form when appropriate.
701: type must be between SLJIT_C_EQUAL and SLJIT_C_SIG_LESS_EQUAL
702: type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP or SLJIT_INT_OP
703: Flags: destroy flags. */
704: SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_cmp(struct sljit_compiler *compiler, int type,
705: int src1, sljit_w src1w,
706: int src2, sljit_w src2w);
707:
708: /* Basic floating point comparison. In most architectures it is implemented as
709: an SLJIT_FCMP operation (setting appropriate flags) followed by a
710: sljit_emit_jump. However some architectures (i.e: MIPS) may employ
711: special optimizations here. It is suggested to use this comparison form
712: when appropriate.
713: type must be between SLJIT_C_FLOAT_EQUAL and SLJIT_C_FLOAT_NOT_NAN
714: type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP
715: Flags: destroy flags.
716: Note: if either operand is NaN, the behaviour is undefined for
717: type <= SLJIT_C_FLOAT_LESS_EQUAL. */
718: SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_fcmp(struct sljit_compiler *compiler, int type,
719: int src1, sljit_w src1w,
720: int src2, sljit_w src2w);
721:
722: /* Set the destination of the jump to this label. */
723: SLJIT_API_FUNC_ATTRIBUTE void sljit_set_label(struct sljit_jump *jump, struct sljit_label* label);
724: /* Only for jumps defined with SLJIT_REWRITABLE_JUMP flag.
725: Note: use sljit_emit_ijump for fixed jumps. */
726: SLJIT_API_FUNC_ATTRIBUTE void sljit_set_target(struct sljit_jump *jump, sljit_uw target);
727:
728: /* Call function or jump anywhere. Both direct and indirect form
729: type must be between SLJIT_JUMP and SLJIT_CALL3
730: Direct form: set src to SLJIT_IMM() and srcw to the address
731: Indirect form: any other valid addressing mode
732: Flags: - (never set any flags) for unconditional jumps.
733: Flags: destroy all flags for calls. */
734: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_ijump(struct sljit_compiler *compiler, int type, int src, sljit_w srcw);
735:
736: /* If op == SLJIT_MOV:
737: Set dst to 1 if condition is fulfilled, 0 otherwise
738: type must be between SLJIT_C_EQUAL and SLJIT_C_FLOAT_NOT_NAN
739: Flags: - (never set any flags)
740: If op == SLJIT_OR
741: Dst is used as src as well, and set its lowest bit to 1 if
742: the condition is fulfilled. Otherwise it does nothing.
743: Flags: E | K
744: Note: sljit_emit_cond_value does nothing, if dst is SLJIT_UNUSED (regardless of op). */
745: SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_cond_value(struct sljit_compiler *compiler, int op, int dst, sljit_w dstw, int type);
746:
747: /* The constant can be changed runtime (see: sljit_set_const)
748: Flags: - (never set any flags) */
749: SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, int dst, sljit_w dstw, sljit_w init_value);
750:
751: /* After the code generation the address for label, jump and const instructions
752: are computed. Since these structures are freed sljit_free_compiler, the
753: addresses must be preserved by the user program elsewere. */
754: static SLJIT_INLINE sljit_uw sljit_get_label_addr(struct sljit_label *label) { return label->addr; }
755: static SLJIT_INLINE sljit_uw sljit_get_jump_addr(struct sljit_jump *jump) { return jump->addr; }
756: static SLJIT_INLINE sljit_uw sljit_get_const_addr(struct sljit_const *const_) { return const_->addr; }
757:
758: /* Only the address is required to rewrite the code. */
759: SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr);
760: SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_w new_constant);
761:
762: /* --------------------------------------------------------------------- */
763: /* Miscellaneous utility functions */
764: /* --------------------------------------------------------------------- */
765:
766: #define SLJIT_MAJOR_VERSION 0
767: #define SLJIT_MINOR_VERSION 87
768:
769: /* Get the human readable name of the platfrom.
770: Can be useful for debugging on platforms like ARM, where ARM and
771: Thumb2 functions can be mixed. */
772: SLJIT_API_FUNC_ATTRIBUTE SLJIT_CONST char* sljit_get_platform_name(void);
773:
774: /* Portble helper function to get an offset of a member. */
775: #define SLJIT_OFFSETOF(base, member) ((sljit_w)(&((base*)0x10)->member) - 0x10)
776:
777: #if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK)
778: /* This global lock is useful to compile common functions. */
779: SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_grab_lock(void);
780: SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_release_lock(void);
781: #endif
782:
783: #if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK)
784:
785: /* The sljit_stack is a utiliy feature of sljit, which allocates a
786: writable memory region between base (inclusive) and limit (exclusive).
787: Both base and limit is a pointer, and base is always <= than limit.
788: This feature uses the "address space reserve" feature
789: of modern operating systems. Basically we don't need to allocate a
790: huge memory block in one step for the worst case, we can start with
791: a smaller chunk and extend it later. Since the address space is
792: reserved, the data never copied to other regions, thus it is safe
793: to store pointers here. */
794:
795: /* Note: The base field is aligned to PAGE_SIZE bytes (usually 4k or more).
796: Note: stack growing should not happen in small steps: 4k, 16k or even
797: bigger growth is better.
798: Note: this structure may not be supported by all operating systems.
799: Some kind of fallback mechanism is suggested when SLJIT_UTIL_STACK
800: is not defined. */
801:
802: struct sljit_stack {
803: /* User data, anything can be stored here.
804: Starting with the same value as base. */
805: sljit_uw top;
806: /* These members are read only. */
807: sljit_uw base;
808: sljit_uw limit;
809: sljit_uw max_limit;
810: };
811:
812: /* Returns NULL if unsuccessful.
813: Note: limit and max_limit contains the size for stack allocation
814: Note: the top field is initialized to base. */
815: SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_CALL sljit_allocate_stack(sljit_uw limit, sljit_uw max_limit);
816: SLJIT_API_FUNC_ATTRIBUTE void SLJIT_CALL sljit_free_stack(struct sljit_stack* stack);
817:
818: /* Can be used to increase (allocate) or decrease (free) the memory area.
819: Returns with a non-zero value if unsuccessful. If new_limit is greater than
820: max_limit, it will fail. It is very easy to implement a stack data structure,
821: since the growth ratio can be added to the current limit, and sljit_stack_resize
822: will do all the necessary checks. The fields of the stack are not changed if
823: sljit_stack_resize fails. */
824: SLJIT_API_FUNC_ATTRIBUTE sljit_w SLJIT_CALL sljit_stack_resize(struct sljit_stack* stack, sljit_uw new_limit);
825:
826: #endif /* (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) */
827:
828: #if !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL)
829:
830: /* Get the entry address of a given function. */
831: #define SLJIT_FUNC_OFFSET(func_name) ((sljit_w)func_name)
832:
833: #else /* !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) */
834:
835: /* All JIT related code should be placed in the same context (library, binary, etc.). */
836:
837: #define SLJIT_FUNC_OFFSET(func_name) ((sljit_w)*(void**)func_name)
838:
839: /* For powerpc64, the function pointers point to a context descriptor. */
840: struct sljit_function_context {
841: sljit_w addr;
842: sljit_w r2;
843: sljit_w r11;
844: };
845:
846: /* Fill the context arguments using the addr and the function.
847: If func_ptr is NULL, it will not be set to the address of context
848: If addr is NULL, the function address also comes from the func pointer. */
849: SLJIT_API_FUNC_ATTRIBUTE void sljit_set_function_context(void** func_ptr, struct sljit_function_context* context, sljit_w addr, void* func);
850:
851: #endif /* !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) */
852:
853: #endif /* _SLJIT_LIR_H_ */
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