Annotation of embedaddon/pcre/sljit/sljitLir.h, revision 1.1
1.1 ! misho 1: /*
! 2: * Stack-less Just-In-Time compiler
! 3: *
! 4: * Copyright 2009-2010 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
! 5: *
! 6: * Redistribution and use in source and binary forms, with or without modification, are
! 7: * permitted provided that the following conditions are met:
! 8: *
! 9: * 1. Redistributions of source code must retain the above copyright notice, this list of
! 10: * conditions and the following disclaimer.
! 11: *
! 12: * 2. Redistributions in binary form must reproduce the above copyright notice, this list
! 13: * of conditions and the following disclaimer in the documentation and/or other materials
! 14: * provided with the distribution.
! 15: *
! 16: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
! 17: * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 18: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
! 19: * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
! 20: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
! 21: * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
! 22: * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 23: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
! 24: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 25: */
! 26:
! 27: #ifndef _SLJIT_LIR_H_
! 28: #define _SLJIT_LIR_H_
! 29:
! 30: /*
! 31: ------------------------------------------------------------------------
! 32: Stack-Less JIT compiler for multiple architectures (x86, ARM, PowerPC)
! 33: ------------------------------------------------------------------------
! 34:
! 35: Short description
! 36: Advantages:
! 37: - The execution can be continued from any LIR instruction
! 38: In other words, jump into and out of the code is safe
! 39: - Both target of (conditional) jump and call instructions
! 40: and constants can be dynamically modified during runtime
! 41: - although it is not suggested to do it frequently
! 42: - very effective to cache an important value once
! 43: - A fixed stack space can be allocated for local variables
! 44: - The compiler is thread-safe
! 45: Disadvantages:
! 46: - Limited number of registers (only 6+4 integer registers, max 3+2
! 47: temporary and max 3+2 general, and 4 floating point registers)
! 48: In practice:
! 49: - This approach is very effective for interpreters
! 50: - One of the general registers typically points to a stack interface
! 51: - It can jump to any exception handler anytime (even for another
! 52: function. It is safe for SLJIT.)
! 53: - Fast paths can be modified during runtime reflecting the changes
! 54: of the fastest execution path of the dynamic language
! 55: - SLJIT supports complex memory addressing modes
! 56: - mainly position independent code
! 57: - Optimizations (perhaps later)
! 58: - Only for basic blocks (when no labels inserted between LIR instructions)
! 59:
! 60: For valgrind users:
! 61: - pass --smc-check=all argument to valgrind, since JIT is a "self-modifying code"
! 62: */
! 63:
! 64: #if !(defined SLJIT_NO_DEFAULT_CONFIG && SLJIT_NO_DEFAULT_CONFIG)
! 65: #include "sljitConfig.h"
! 66: #endif
! 67: #include "sljitConfigInternal.h"
! 68:
! 69: /* --------------------------------------------------------------------- */
! 70: /* Error codes */
! 71: /* --------------------------------------------------------------------- */
! 72:
! 73: /* Indicates no error. */
! 74: #define SLJIT_SUCCESS 0
! 75: /* After the call of sljit_generate_code(), the error code of the compiler
! 76: is set to this value to avoid future sljit calls (in debug mode at least).
! 77: The complier should be freed after sljit_generate_code(). */
! 78: #define SLJIT_ERR_COMPILED 1
! 79: /* Cannot allocate non executable memory. */
! 80: #define SLJIT_ERR_ALLOC_FAILED 2
! 81: /* Cannot allocate executable memory.
! 82: Only for sljit_generate_code() */
! 83: #define SLJIT_ERR_EX_ALLOC_FAILED 3
! 84: /* return value for SLJIT_CONFIG_UNSUPPORTED empty architecture. */
! 85: #define SLJIT_ERR_UNSUPPORTED 4
! 86:
! 87: /* --------------------------------------------------------------------- */
! 88: /* Registers */
! 89: /* --------------------------------------------------------------------- */
! 90:
! 91: #define SLJIT_UNUSED 0
! 92:
! 93: /* Temporary (scratch) registers may not preserve their values across function calls. */
! 94: #define SLJIT_TEMPORARY_REG1 1
! 95: #define SLJIT_TEMPORARY_REG2 2
! 96: #define SLJIT_TEMPORARY_REG3 3
! 97: /* Note: Extra Registers cannot be used for memory addressing. */
! 98: /* Note: on x86-32, these registers are emulated (using stack loads & stores). */
! 99: #define SLJIT_TEMPORARY_EREG1 4
! 100: #define SLJIT_TEMPORARY_EREG2 5
! 101:
! 102: /* General (saved) registers preserve their values across function calls. */
! 103: #define SLJIT_GENERAL_REG1 6
! 104: #define SLJIT_GENERAL_REG2 7
! 105: #define SLJIT_GENERAL_REG3 8
! 106: /* Note: Extra Registers cannot be used for memory addressing. */
! 107: /* Note: on x86-32, these registers are emulated (using stack loads & stores). */
! 108: #define SLJIT_GENERAL_EREG1 9
! 109: #define SLJIT_GENERAL_EREG2 10
! 110:
! 111: /* Read-only register (cannot be the destination of an operation). */
! 112: /* Note: SLJIT_MEM2( ... , SLJIT_LOCALS_REG) is not supported (x86 limitation). */
! 113: /* Note: SLJIT_LOCALS_REG is not necessary the real stack pointer. See sljit_emit_enter. */
! 114: #define SLJIT_LOCALS_REG 11
! 115:
! 116: /* Number of registers. */
! 117: #define SLJIT_NO_TMP_REGISTERS 5
! 118: #define SLJIT_NO_GEN_REGISTERS 5
! 119: #define SLJIT_NO_REGISTERS 11
! 120:
! 121: /* Return with machine word. */
! 122:
! 123: #define SLJIT_RETURN_REG SLJIT_TEMPORARY_REG1
! 124:
! 125: /* x86 prefers temporary registers for special purposes. If other
! 126: registers are used such purpose, it costs a little performance
! 127: drawback. It doesn't matter for other archs. */
! 128:
! 129: #define SLJIT_PREF_SHIFT_REG SLJIT_TEMPORARY_REG3
! 130:
! 131: /* --------------------------------------------------------------------- */
! 132: /* Floating point registers */
! 133: /* --------------------------------------------------------------------- */
! 134:
! 135: /* Note: SLJIT_UNUSED as destination is not valid for floating point
! 136: operations, since they cannot be used for setting flags. */
! 137:
! 138: /* Floating point operations are performed on double precision values. */
! 139:
! 140: #define SLJIT_FLOAT_REG1 1
! 141: #define SLJIT_FLOAT_REG2 2
! 142: #define SLJIT_FLOAT_REG3 3
! 143: #define SLJIT_FLOAT_REG4 4
! 144:
! 145: /* --------------------------------------------------------------------- */
! 146: /* Main structures and functions */
! 147: /* --------------------------------------------------------------------- */
! 148:
! 149: struct sljit_memory_fragment {
! 150: struct sljit_memory_fragment *next;
! 151: sljit_uw used_size;
! 152: sljit_ub memory[1];
! 153: };
! 154:
! 155: struct sljit_label {
! 156: struct sljit_label *next;
! 157: sljit_uw addr;
! 158: /* The maximum size difference. */
! 159: sljit_uw size;
! 160: };
! 161:
! 162: struct sljit_jump {
! 163: struct sljit_jump *next;
! 164: sljit_uw addr;
! 165: sljit_w flags;
! 166: union {
! 167: sljit_uw target;
! 168: struct sljit_label* label;
! 169: } u;
! 170: };
! 171:
! 172: struct sljit_const {
! 173: struct sljit_const *next;
! 174: sljit_uw addr;
! 175: };
! 176:
! 177: struct sljit_compiler {
! 178: int error;
! 179:
! 180: struct sljit_label *labels;
! 181: struct sljit_jump *jumps;
! 182: struct sljit_const *consts;
! 183: struct sljit_label *last_label;
! 184: struct sljit_jump *last_jump;
! 185: struct sljit_const *last_const;
! 186:
! 187: struct sljit_memory_fragment *buf;
! 188: struct sljit_memory_fragment *abuf;
! 189:
! 190: /* Used local registers. */
! 191: int temporaries;
! 192: /* Used general registers. */
! 193: int generals;
! 194: /* Local stack size. */
! 195: int local_size;
! 196: /* Code size. */
! 197: sljit_uw size;
! 198: /* 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_ */
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to sljitLir.h CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / pcre / sljit