summaryrefslogtreecommitdiff
path: root/sljit/sljitLir.h
diff options
context:
space:
mode:
authorph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15>2011-08-22 14:35:22 +0000
committerph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15>2011-08-22 14:35:22 +0000
commit6830d6ce7bb4a5178b8cb866e6e262268f00b8d8 (patch)
tree672f743c90198ec1d45b506e55a7e99701d5b8ea /sljit/sljitLir.h
parent726ab5e2bc4e0cca8ea937d0eaa89007d3080d91 (diff)
downloadpcre-6830d6ce7bb4a5178b8cb866e6e262268f00b8d8.tar.gz
JIT compiler source
git-svn-id: svn://vcs.exim.org/pcre/code/trunk@662 2f5784b3-3f2a-0410-8824-cb99058d5e15
Diffstat (limited to 'sljit/sljitLir.h')
-rw-r--r--sljit/sljitLir.h737
1 files changed, 737 insertions, 0 deletions
diff --git a/sljit/sljitLir.h b/sljit/sljitLir.h
new file mode 100644
index 0000000..6e26d06
--- /dev/null
+++ b/sljit/sljitLir.h
@@ -0,0 +1,737 @@
+/*
+ * Stack-less Just-In-Time compiler
+ *
+ * Copyright 2009-2010 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this list of
+ * conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice, this list
+ * of conditions and the following disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _SLJIT_LIR_H_
+#define _SLJIT_LIR_H_
+
+/*
+ ------------------------------------------------------------------------
+ Stack-Less JIT compiler for multiple architectures (x86, ARM, PowerPC)
+ ------------------------------------------------------------------------
+
+ Short description
+ Advantages:
+ - The execution can be continued from any LIR instruction
+ In other words, jump into and out of the code is safe
+ - Both target of (conditional) jump and call instructions
+ and constants can be dynamically modified during runtime
+ - although it is not suggested to do it frequently
+ - very effective to cache an important value once
+ - A fixed stack space can be allocated for local variables
+ - The compiler is thread-safe
+ Disadvantages:
+ - Limited number of registers (only 6+4 integer registers, max 3+2
+ temporary and max 3+2 general, and 4 floating point registers)
+ In practice:
+ - This approach is very effective for interpreters
+ - One of the general registers typically points to a stack interface
+ - It can jump to any exception handler anytime (even for another
+ function. It is safe for SLJIT.)
+ - Fast paths can be modified during runtime reflecting the changes
+ of the fastest execution path of the dynamic language
+ - SLJIT supports complex memory addressing modes
+ - mainly position independent code
+ - Optimizations (perhaps later)
+ - Only for basic blocks (when no labels inserted between LIR instructions)
+*/
+
+#if !(defined SLJIT_NO_DEFAULT_CONFIG && SLJIT_NO_DEFAULT_CONFIG)
+#include "sljitConfig.h"
+#endif
+#include "sljitConfigInternal.h"
+
+/* --------------------------------------------------------------------- */
+/* Error codes */
+/* --------------------------------------------------------------------- */
+
+/* Indicates no error. */
+#define SLJIT_SUCCESS 0
+/* After the call of sljit_generate_code(), the error code of the compiler
+ is set to this value to avoid future sljit calls (in debug mode at least).
+ The complier should be freed after sljit_generate_code(). */
+#define SLJIT_ERR_COMPILED 1
+/* Cannot allocate non executable memory. */
+#define SLJIT_ERR_ALLOC_FAILED 2
+/* Cannot allocate executable memory.
+ Only for sljit_generate_code() */
+#define SLJIT_ERR_EX_ALLOC_FAILED 3
+/* return value for SLJIT_CONFIG_UNSUPPORTED empty architecture. */
+#define SLJIT_ERR_UNSUPPORTED 4
+
+/* --------------------------------------------------------------------- */
+/* Registers */
+/* --------------------------------------------------------------------- */
+
+#define SLJIT_UNUSED 0
+
+#define SLJIT_TEMPORARY_REG1 1
+#define SLJIT_TEMPORARY_REG2 2
+#define SLJIT_TEMPORARY_REG3 3
+/* Note: Extra Registers cannot be used for memory addressing. */
+/* Note: on x86-32, these registers are emulated (using stack loads & stores). */
+#define SLJIT_TEMPORARY_EREG1 4
+#define SLJIT_TEMPORARY_EREG2 5
+
+#define SLJIT_GENERAL_REG1 6
+#define SLJIT_GENERAL_REG2 7
+#define SLJIT_GENERAL_REG3 8
+/* Note: Extra Registers cannot be used for memory addressing. */
+/* Note: on x86-32, these registers are emulated (using stack loads & stores). */
+#define SLJIT_GENERAL_EREG1 9
+#define SLJIT_GENERAL_EREG2 10
+
+/* Read-only register (cannot be the destination of an operation). */
+/* Note: SLJIT_MEM2( ... , SLJIT_LOCALS_REG) is not supported (x86 limitation). */
+/* Note: SLJIT_LOCALS_REG is not necessary the real stack pointer. See sljit_emit_enter. */
+#define SLJIT_LOCALS_REG 11
+
+/* Number of registers. */
+#define SLJIT_NO_TMP_REGISTERS 5
+#define SLJIT_NO_GEN_REGISTERS 5
+#define SLJIT_NO_REGISTERS 11
+
+/* Return with machine word. */
+
+#define SLJIT_RETURN_REG SLJIT_TEMPORARY_REG1
+
+/* x86 prefers temporary registers for special purposes. If other
+ registers are used such purpose, it costs a little performance
+ drawback. It doesn't matter for other archs. */
+
+#define SLJIT_PREF_SHIFT_REG SLJIT_TEMPORARY_REG3
+
+/* --------------------------------------------------------------------- */
+/* Floating point registers */
+/* --------------------------------------------------------------------- */
+
+/* Note: SLJIT_UNUSED as destination is not valid for floating point
+ operations, since they cannot be used for setting flags. */
+
+/* Floating point operations are performed on double precision values. */
+
+#define SLJIT_FLOAT_REG1 1
+#define SLJIT_FLOAT_REG2 2
+#define SLJIT_FLOAT_REG3 3
+#define SLJIT_FLOAT_REG4 4
+
+/* --------------------------------------------------------------------- */
+/* Main structures and functions */
+/* --------------------------------------------------------------------- */
+
+struct sljit_memory_fragment {
+ struct sljit_memory_fragment *next;
+ sljit_uw used_size;
+ sljit_ub memory[1];
+};
+
+struct sljit_label {
+ struct sljit_label *next;
+ sljit_uw addr;
+ /* The maximum size difference. */
+ sljit_uw size;
+};
+
+struct sljit_jump {
+ struct sljit_jump *next;
+ sljit_uw addr;
+ sljit_w flags;
+ union {
+ sljit_uw target;
+ struct sljit_label* label;
+ } u;
+};
+
+struct sljit_const {
+ struct sljit_const *next;
+ sljit_uw addr;
+};
+
+struct sljit_compiler {
+ int error;
+
+ struct sljit_label *labels;
+ struct sljit_jump *jumps;
+ struct sljit_const *consts;
+ struct sljit_label *last_label;
+ struct sljit_jump *last_jump;
+ struct sljit_const *last_const;
+
+ struct sljit_memory_fragment *buf;
+ struct sljit_memory_fragment *abuf;
+
+ /* Used local registers. */
+ int temporaries;
+ /* Used general registers. */
+ int generals;
+ /* Local stack size. */
+ int local_size;
+ /* Code size. */
+ sljit_uw size;
+
+#if (defined SLJIT_CONFIG_X86_32 && SLJIT_CONFIG_X86_32)
+ int args;
+ int temporaries_start;
+ int generals_start;
+#endif
+
+#if (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64)
+ int mode32;
+#endif
+
+#if (defined SLJIT_CONFIG_X86_32 && SLJIT_CONFIG_X86_32) || (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64)
+ int flags_saved;
+#endif
+
+#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
+ /* Constant pool handling. */
+ sljit_uw *cpool;
+ sljit_ub *cpool_unique;
+ sljit_uw cpool_diff;
+ sljit_uw cpool_fill;
+ /* General fields. */
+ /* Contains pointer, "ldr pc, [...]" pairs. */
+ sljit_uw patches;
+#endif
+
+#if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5) || (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
+ /* Temporary fields. */
+ sljit_uw shift_imm;
+ int cache_arg;
+ sljit_w cache_argw;
+#endif
+
+#if (defined SLJIT_CONFIG_ARM_THUMB2 && SLJIT_CONFIG_ARM_THUMB2)
+ int cache_arg;
+ sljit_w cache_argw;
+#endif
+
+#if (defined SLJIT_CONFIG_PPC_32 && SLJIT_CONFIG_PPC_32) || (defined SLJIT_CONFIG_PPC_64 && SLJIT_CONFIG_PPC_64)
+ int has_locals;
+ sljit_w imm;
+ int cache_arg;
+ sljit_w cache_argw;
+#endif
+
+#if (defined SLJIT_CONFIG_MIPS_32 && SLJIT_CONFIG_MIPS_32)
+ int has_locals;
+ int delay_slot;
+ int cache_arg;
+ sljit_w cache_argw;
+#endif
+
+#if (defined SLJIT_VERBOSE && SLJIT_VERBOSE)
+ FILE* verbose;
+#endif
+
+#if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) || (defined SLJIT_DEBUG && SLJIT_DEBUG)
+ int skip_checks;
+#endif
+};
+
+/* --------------------------------------------------------------------- */
+/* Main functions */
+/* --------------------------------------------------------------------- */
+
+/* Creates an sljit compiler.
+ Returns NULL if failed. */
+struct sljit_compiler* sljit_create_compiler(void);
+/* Free everything except the codes. */
+void sljit_free_compiler(struct sljit_compiler *compiler);
+
+static SLJIT_INLINE int sljit_get_compiler_error(struct sljit_compiler *compiler) { return compiler->error; }
+
+/*
+ Allocate a small amount of memory. The size must be <= 64 bytes on 32 bit,
+ and <= 128 bytes on 64 bit architectures. The memory area is owned by the compiler,
+ and freed by sljit_free_compiler. The returned pointer is sizeof(sljit_w) aligned.
+ Excellent for allocating small blocks during the compiling, and no need to worry
+ about freeing them. The size is enough to contain at most 16 pointers.
+ If the size is outside of the range, the function will return with NULL,
+ but this return value does not indicate that there is no more memory (does
+ not set the compiler to out-of-memory status).
+*/
+void* sljit_alloc_memory(struct sljit_compiler *compiler, int size);
+
+#if (defined SLJIT_VERBOSE && SLJIT_VERBOSE)
+/* Passing NULL disables verbose. */
+void sljit_compiler_verbose(struct sljit_compiler *compiler, FILE* verbose);
+#endif
+
+void* sljit_generate_code(struct sljit_compiler *compiler);
+void sljit_free_code(void* code);
+
+/* Instruction generation. Returns with error code. */
+
+/*
+ Entry instruction. The instruction has "args" number of arguments
+ and will use the first "general" number of general registers.
+ The arguments are passed into the general registers (arg1 to general_reg1, and so on).
+ Thus, "args" must be less or equal than "general". A local_size extra
+ stack space is allocated for the jit code (must be less or equal than
+ SLJIT_MAX_LOCAL_SIZE), which can accessed through SLJIT_LOCALS_REG (see
+ the notes there). SLJIT_LOCALS_REG is not necessary the real stack pointer!
+ It just points somewhere in the stack if local_size > 0 (!). Thus, the only
+ thing which is known that the memory area between SLJIT_LOCALS_REG and
+ SLJIT_LOCALS_REG + local_size is a valid stack area if local_size > 0
+*/
+
+/* Note: multiple calls of this function overwrites the previous call. */
+
+#define SLJIT_MAX_LOCAL_SIZE 65536
+
+int sljit_emit_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size);
+
+/* Since sljit_emit_return (and many asserts) uses variables which are initialized
+ by sljit_emit_enter, a simple return is not possible if these variables are not
+ initialized. sljit_fake_enter does not emit any instruction, just initialize
+ those variables. */
+
+/* Note: multiple calls of this function overwrites the previous call. */
+
+void sljit_fake_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size);
+
+/* Return from jit. See below the possible values for src and srcw. */
+int sljit_emit_return(struct sljit_compiler *compiler, int src, sljit_w srcw);
+
+/* Really fast calling method for utility functions inside sljit (see SLJIT_FAST_CALL).
+ All registers and even the stack frame is passed to the callee. The return address is
+ preserved in dst/dstw by sljit_emit_fast_enter, and sljit_emit_fast_return can
+ use this as a return value later. */
+
+/* Note: only for sljit specific, non ABI compilant calls. Fast, since only a few machine instructions
+ are needed. Excellent for small uility functions, where saving general registers and setting up
+ a new stack frame would cost too much performance. However, it is still possible to return
+ to the address of the caller (or anywhere else). */
+
+/* Note: flags are not changed (unlike sljit_emit_enter / sljit_emit_return). */
+
+/* Note: although sljit_emit_fast_return could be replaced by an ijump, it is not suggested,
+ since many architectures do clever branch prediction on call / return instruction pairs. */
+
+int sljit_emit_fast_enter(struct sljit_compiler *compiler, int dst, sljit_w dstw, int args, int temporaries, int generals, int local_size);
+int sljit_emit_fast_return(struct sljit_compiler *compiler, int src, sljit_w srcw);
+
+/*
+ Source and destination values for arithmetical instructions
+ imm - a simple immediate value (cannot be used as a destination)
+ reg - any of the registers (immediate argument must be 0)
+ [imm] - absolute immediate memory address
+ [reg+imm] - indirect memory address
+ [reg+(reg<<imm)] - indirect indexed memory address (shift must be between 0 and 3)
+ useful for (byte, half, int, sljit_w) array access
+ (fully supported by both x86 and ARM architectures, and cheap operation on others)
+*/
+
+/*
+ IMPORATNT NOTE: memory access MUST be naturally aligned.
+ length | alignment
+ ---------+-----------
+ byte | 1 byte (not aligned)
+ half | 2 byte (real_address & 0x1 == 0)
+ int | 4 byte (real_address & 0x3 == 0)
+ sljit_w | 4 byte if SLJIT_32BIT_ARCHITECTURE defined
+ | 8 byte if SLJIT_64BIT_ARCHITECTURE defined
+ (This is a strict requirement for embedded systems.)
+
+ Note: different architectures have different addressing limitations
+ Thus sljit may generate several instructions for other addressing modes
+ x86: all addressing modes supported, but write-back is not supported
+ (requires an extra instruction). On x86-64 only 32 bit signed
+ integers are supported by the architecture.
+ arm: [reg+imm] supported for small immediates (-4095 <= imm <= 4095
+ or -255 <= imm <= 255 for loading signed bytes, any halfs or doubles)
+ [reg+(reg<<imm)] are supported or requires only two instructions
+ Write back is limited to small immediates on thumb2
+ ppc: [reg+imm], -65535 <= imm <= 65535. 64 bit moves requires immediates
+ divisible by 4. [reg+reg] supported, write-back supported
+ [reg+(reg<<imm)] (imm != 0) is cheap (requires two instructions)
+*/
+
+/* Register output: simply the name of the register.
+ For destination, you can use SLJIT_UNUSED as well. */
+#define SLJIT_MEM 0x100
+#define SLJIT_MEM0() (SLJIT_MEM)
+#define SLJIT_MEM1(r1) (SLJIT_MEM | (r1))
+#define SLJIT_MEM2(r1, r2) (SLJIT_MEM | (r1) | ((r2) << 4))
+#define SLJIT_IMM 0x200
+
+/* Set 32 bit operation mode (I) on 64 bit CPUs. The flag is totally ignored on
+ 32 bit CPUs. The arithmetic instruction uses only the lower 32 bit of the
+ input register(s), and set the flags according to the 32 bit result. If the
+ destination is a register, the higher 32 bit of the result is undefined.
+ The addressing modes (SLJIT_MEM1/SLJIT_MEM2 macros) are unaffected by this flag. */
+#define SLJIT_INT_OP 0x100
+
+/* Common CPU status flags for all architectures (x86, ARM, PPC)
+ - carry flag
+ - overflow flag
+ - zero flag
+ - negative/positive flag (depends on arc)
+ On mips, these flags are emulated by software. */
+
+/* By default, the instructions may, or may not set the CPU status flags.
+ Forcing to set or keep status flags can be done with the following flags: */
+
+/* Note: sljit tries to emit the minimum number of instructions. Using these
+ flags can increase them, so use them wisely to avoid unnecessary code generation. */
+
+/* Set Equal (Zero) status flag (E). */
+#define SLJIT_SET_E 0x0200
+/* Set signed status flag (S). */
+#define SLJIT_SET_S 0x0400
+/* Set unsgined status flag (U). */
+#define SLJIT_SET_U 0x0800
+/* Set signed overflow flag (O). */
+#define SLJIT_SET_O 0x1000
+/* Set carry flag (C).
+ Note: Kinda unsigned overflow, but behaves differently on various cpus. */
+#define SLJIT_SET_C 0x2000
+/* Do not modify the flags (K).
+ Note: This flag cannot be combined with any other SLJIT_SET_* flag. */
+#define SLJIT_KEEP_FLAGS 0x4000
+
+/* Notes:
+ - you cannot postpone conditional jump instructions except if noted that
+ the instruction does not set flags (See: SLJIT_KEEP_FLAGS).
+ - flag combinations: '|' means 'logical or'. */
+
+/* Flags: - (never set any flags)
+ Note: breakpoint instruction is not supported by all architectures (namely ppc)
+ It falls back to SLJIT_NOP in those cases. */
+#define SLJIT_BREAKPOINT 0
+/* Flags: - (never set any flags)
+ Note: may or may not cause an extra cycle wait
+ it can even decrease the runtime in a few cases. */
+#define SLJIT_NOP 1
+
+int sljit_emit_op0(struct sljit_compiler *compiler, int op);
+
+/* Notes for MOV instructions:
+ U = Mov with update (post form). If source or destination defined as SLJIT_MEM1(r1)
+ or SLJIT_MEM2(r1, r2), r1 is increased by the sum of r2 and the constant argument
+ UB = unsigned byte (8 bit)
+ SB = signed byte (8 bit)
+ UH = unsgined half (16 bit)
+ SH = unsgined half (16 bit) */
+
+/* Flags: - (never set any flags) */
+#define SLJIT_MOV 2
+/* Flags: - (never set any flags) */
+#define SLJIT_MOV_UB 3
+/* Flags: - (never set any flags) */
+#define SLJIT_MOV_SB 4
+/* Flags: - (never set any flags) */
+#define SLJIT_MOV_UH 5
+/* Flags: - (never set any flags) */
+#define SLJIT_MOV_SH 6
+/* Flags: - (never set any flags) */
+#define SLJIT_MOV_UI 7
+/* Flags: - (never set any flags) */
+#define SLJIT_MOV_SI 8
+/* Flags: - (never set any flags) */
+#define SLJIT_MOVU 9
+/* Flags: - (never set any flags) */
+#define SLJIT_MOVU_UB 10
+/* Flags: - (never set any flags) */
+#define SLJIT_MOVU_SB 11
+/* Flags: - (never set any flags) */
+#define SLJIT_MOVU_UH 12
+/* Flags: - (never set any flags) */
+#define SLJIT_MOVU_SH 13
+/* Flags: - (never set any flags) */
+#define SLJIT_MOVU_UI 14
+/* Flags: - (never set any flags) */
+#define SLJIT_MOVU_SI 15
+/* Flags: I | E | K */
+#define SLJIT_NOT 16
+/* Flags: I | E | O | K */
+#define SLJIT_NEG 17
+/* Count leading zeroes
+ Flags: I | E | K */
+#define SLJIT_CLZ 18
+
+int sljit_emit_op1(struct sljit_compiler *compiler, int op,
+ int dst, sljit_w dstw,
+ int src, sljit_w srcw);
+
+/* Flags: I | E | O | C | K */
+#define SLJIT_ADD 19
+/* Flags: I | C | K */
+#define SLJIT_ADDC 20
+/* Flags: I | E | S | U | O | C | K */
+#define SLJIT_SUB 21
+/* Flags: I | C | K */
+#define SLJIT_SUBC 22
+/* Note: integer mul */
+/* Flags: I | O (see SLJIT_C_MUL_*) | K */
+#define SLJIT_MUL 23
+/* Flags: I | E | K */
+#define SLJIT_AND 24
+/* Flags: I | E | K */
+#define SLJIT_OR 25
+/* Flags: I | E | K */
+#define SLJIT_XOR 26
+/* Flags: I | E | K */
+#define SLJIT_SHL 27
+/* Flags: I | E | K */
+#define SLJIT_LSHR 28
+/* Flags: I | E | K */
+#define SLJIT_ASHR 29
+
+int sljit_emit_op2(struct sljit_compiler *compiler, int op,
+ int dst, sljit_w dstw,
+ int src1, sljit_w src1w,
+ int src2, sljit_w src2w);
+
+int sljit_is_fpu_available(void);
+
+/* Note: dst is the left and src is the right operand for SLJIT_FCMP.
+ Note: NaN check is always performed. If SLJIT_C_FLOAT_NAN is set,
+ the comparison result is unpredictable.
+ Flags: E | S (see SLJIT_C_FLOAT_*) */
+#define SLJIT_FCMP 30
+/* Flags: - (never set any flags) */
+#define SLJIT_FMOV 31
+/* Flags: - (never set any flags) */
+#define SLJIT_FNEG 32
+/* Flags: - (never set any flags) */
+#define SLJIT_FABS 33
+
+int sljit_emit_fop1(struct sljit_compiler *compiler, int op,
+ int dst, sljit_w dstw,
+ int src, sljit_w srcw);
+
+/* Flags: - (never set any flags) */
+#define SLJIT_FADD 34
+/* Flags: - (never set any flags) */
+#define SLJIT_FSUB 35
+/* Flags: - (never set any flags) */
+#define SLJIT_FMUL 36
+/* Flags: - (never set any flags) */
+#define SLJIT_FDIV 37
+
+int sljit_emit_fop2(struct sljit_compiler *compiler, int op,
+ int dst, sljit_w dstw,
+ int src1, sljit_w src1w,
+ int src2, sljit_w src2w);
+
+/* Label and jump instructions. */
+
+struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler);
+
+/* Invert conditional instruction: xor (^) with 0x1 */
+#define SLJIT_C_EQUAL 0
+#define SLJIT_C_ZERO 0
+#define SLJIT_C_NOT_EQUAL 1
+#define SLJIT_C_NOT_ZERO 1
+
+#define SLJIT_C_LESS 2
+#define SLJIT_C_GREATER_EQUAL 3
+#define SLJIT_C_GREATER 4
+#define SLJIT_C_LESS_EQUAL 5
+#define SLJIT_C_SIG_LESS 6
+#define SLJIT_C_SIG_GREATER_EQUAL 7
+#define SLJIT_C_SIG_GREATER 8
+#define SLJIT_C_SIG_LESS_EQUAL 9
+
+#define SLJIT_C_OVERFLOW 10
+#define SLJIT_C_NOT_OVERFLOW 11
+
+#define SLJIT_C_MUL_OVERFLOW 12
+#define SLJIT_C_MUL_NOT_OVERFLOW 13
+
+#define SLJIT_C_FLOAT_EQUAL 14
+#define SLJIT_C_FLOAT_NOT_EQUAL 15
+#define SLJIT_C_FLOAT_LESS 16
+#define SLJIT_C_FLOAT_GREATER_EQUAL 17
+#define SLJIT_C_FLOAT_GREATER 18
+#define SLJIT_C_FLOAT_LESS_EQUAL 19
+#define SLJIT_C_FLOAT_NAN 20
+#define SLJIT_C_FLOAT_NOT_NAN 21
+
+#define SLJIT_JUMP 22
+#define SLJIT_CALL0 23
+#define SLJIT_CALL1 24
+#define SLJIT_CALL2 25
+#define SLJIT_CALL3 26
+
+/* Fast calling method. See sljit_emit_fast_enter / sljit_emit_fast_return. */
+#define SLJIT_FAST_CALL SLJIT_CALL0
+
+/* The target can be changed during runtime (see: sljit_set_jump_addr). */
+#define SLJIT_REWRITABLE_JUMP 0x1000
+
+/* Emit a jump instruction. The destination is not set, only the type of the jump.
+ type must be between SLJIT_C_EQUAL and SLJIT_CALL3
+ type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP
+ Flags: - (never set any flags) for both conditional and unconditional jumps.
+ Flags: destroy all flags for calls. */
+struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, int type);
+
+/* Basic arithmetic comparison. In most architectures it is equal to
+ an SLJIT_SUB operation (with SLJIT_UNUSED destination) followed by a
+ sljit_emit_jump. However some architectures (i.e: MIPS) may employ
+ special optimizations here. It is suggested to use this comparison
+ form when flags are unimportant.
+ type must be between SLJIT_C_EQUAL and SLJIT_C_SIG_LESS_EQUAL
+ type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP or SLJIT_INT_OP
+ Flags: destroy flags. */
+struct sljit_jump* sljit_emit_cmp(struct sljit_compiler *compiler, int type,
+ int src1, sljit_w src1w,
+ int src2, sljit_w src2w);
+
+/* Set the destination of the jump to this label. */
+void sljit_set_label(struct sljit_jump *jump, struct sljit_label* label);
+/* Only for jumps defined with SLJIT_REWRITABLE_JUMP flag.
+ Note: use sljit_emit_ijump for fixed jumps. */
+void sljit_set_target(struct sljit_jump *jump, sljit_uw target);
+
+/* Call function or jump anywhere. Both direct and indirect form
+ type must be between SLJIT_JUMP and SLJIT_CALL3
+ Direct form: set src to SLJIT_IMM() and srcw to the address
+ Indirect form: any other valid addressing mode
+ Flags: - (never set any flags) for unconditional jumps.
+ Flags: destroy all flags for calls. */
+int sljit_emit_ijump(struct sljit_compiler *compiler, int type, int src, sljit_w srcw);
+
+/* If op == SLJIT_MOV:
+ Set dst to 1 if condition is fulfilled, 0 otherwise
+ type must be between SLJIT_C_EQUAL and SLJIT_C_FLOAT_NOT_NAN
+ Flags: - (never set any flags)
+ If op == SLJIT_OR
+ Dst is used as src as well, and set its lowest bit to 1 if
+ the condition is fulfilled. Otherwise it does nothing.
+ Flags: E | K
+ Note: sljit_emit_cond_value does nothing, if dst is SLJIT_UNUSED (regardless of op). */
+int sljit_emit_cond_value(struct sljit_compiler *compiler, int op, int dst, sljit_w dstw, int type);
+
+/* The constant can be changed runtime (see: sljit_set_const)
+ Flags: - (never set any flags) */
+struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, int dst, sljit_w dstw, sljit_w init_value);
+
+/* After the code generation the address for label, jump and const instructions
+ are computed. Since these structures are freed sljit_free_compiler, the
+ addresses must be preserved by the user program elsewere. */
+static SLJIT_INLINE sljit_uw sljit_get_label_addr(struct sljit_label *label) { return label->addr; }
+static SLJIT_INLINE sljit_uw sljit_get_jump_addr(struct sljit_jump *jump) { return jump->addr; }
+static SLJIT_INLINE sljit_uw sljit_get_const_addr(struct sljit_const *const_) { return const_->addr; }
+
+/* Only the address is required to rewrite the code. */
+void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr);
+void sljit_set_const(sljit_uw addr, sljit_w new_constant);
+
+/* --------------------------------------------------------------------- */
+/* Miscellaneous utility functions */
+/* --------------------------------------------------------------------- */
+
+#define SLJIT_MAJOR_VERSION 0
+#define SLJIT_MINOR_VERSION 82
+
+/* Get the human readable name of the platfrom.
+ Can be useful for debugging on platforms like ARM, where ARM and
+ Thumb2 functions can be mixed. */
+SLJIT_CONST char* sljit_get_platform_name(void);
+
+/* Portble helper function to get an offset of a member. */
+#define SLJIT_OFFSETOF(base, member) ((sljit_w)(&((base*)0x10)->member) - 0x10)
+
+#if (defined SLJIT_UTIL_GLOBAL_LOCK && SLJIT_UTIL_GLOBAL_LOCK)
+/* This global lock is useful to compile common functions. */
+void SLJIT_CALL sljit_grab_lock(void);
+void SLJIT_CALL sljit_release_lock(void);
+#endif
+
+#if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK)
+
+/* The sljit_stack is a utiliy feature of sljit, which allocates a
+ writable memory region between base (inclusive) and limit (exclusive).
+ Both base and limit is a pointer, and base is always <= than limit.
+ This feature uses the "address space reserve" feature
+ of modern operating systems. Basically we don't need to allocate a
+ huge memory block in one step for the worst case, we can start with
+ a smaller chunk and extend it later. Since the address space is
+ reserved, the data never copied to other regions, thus it is safe
+ to store pointers here. */
+
+/* Note: The base field is aligned to PAGE_SIZE bytes (usually 4k or more).
+ Note: stack growing should not happen in small steps: 4k, 16k or even
+ bigger growth is better.
+ Note: this structure may not be supported by all operating systems.
+ Some kind of fallback mechanism is suggested when SLJIT_UTIL_STACK
+ is not defined. */
+
+struct sljit_stack {
+ /* User data, anything can be stored here.
+ Starting with the same value as base. */
+ sljit_uw top;
+ /* These members are read only. */
+ sljit_uw base;
+ sljit_uw limit;
+ sljit_uw max_limit;
+};
+
+/* Returns NULL if unsuccessful.
+ Note: limit and max_limit contains the size for stack allocation
+ Note: the top field is initialized to base. */
+struct sljit_stack* SLJIT_CALL sljit_allocate_stack(sljit_w limit, sljit_w max_limit);
+void SLJIT_CALL sljit_free_stack(struct sljit_stack* stack);
+
+/* Can be used to increase (allocate) or decrease (free) the memory area.
+ Returns with a non-zero value if unsuccessful. If new_limit is greater than
+ max_limit, it will fail. It is very easy to implement a stack data structure,
+ since the growth ratio can be added to the current limit, and sljit_stack_resize
+ will do all the necessary checks. The fields of the stack are not changed if
+ sljit_stack_resize fails. */
+sljit_w SLJIT_CALL sljit_stack_resize(struct sljit_stack* stack, sljit_w new_limit);
+
+#endif /* (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) */
+
+#if !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL)
+
+/* Get the entry address of a given function. */
+#define SLJIT_FUNC_OFFSET(func_name) ((sljit_w)func_name)
+
+#else /* !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) */
+
+/* All JIT related code should be placed in the same context (library, binary, etc.). */
+
+#define SLJIT_FUNC_OFFSET(func_name) ((sljit_w)*(void**)func_name)
+
+/* For powerpc64, the function pointers point to a context descriptor. */
+struct sljit_function_context {
+ sljit_w addr;
+ sljit_w r2;
+ sljit_w r11;
+};
+
+/* Fill the context arguments using the addr and the function.
+ If func_ptr is NULL, it will not be set to the address of context
+ If addr is NULL, the function address also comes from the func pointer. */
+void sljit_set_function_context(void** func_ptr, struct sljit_function_context* context, sljit_w addr, void* func);
+
+#endif /* !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) */
+
+#endif /* _SLJIT_LIR_H_ */