Edit File: sljitLir.h
/* * Stack-less Just-In-Time compiler * * Copyright 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, it is possible to jump to any label from anywhere, even from a code fragment, which is compiled later, if both compiled code shares the same context. See sljit_emit_enter for more details - Supports self modifying code: target of (conditional) jump and call instructions and some constant values can be dynamically modified during runtime - although it is not suggested to do it frequently - can be used for inline caching: save an important value once in the instruction stream - since this feature limits the optimization possibilities, a special flag must be passed at compile time when these instructions are emitted - A fixed stack space can be allocated for local variables - The compiler is thread-safe - The compiler is highly configurable through preprocessor macros. You can disable unneeded features (multithreading in single threaded applications), and you can use your own system functions (including memory allocators). See sljitConfig.h Disadvantages: - No automatic register allocation, and temporary results are not stored on the stack. (hence the name comes) In practice: - This approach is very effective for interpreters - One of the saved registers typically points to a stack interface - It can jump to any exception handler anytime (even if it belongs to another function) - Hot 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 and context independent code (except some cases) For valgrind users: - pass --smc-check=all argument to valgrind, since JIT is a "self-modifying code" */ #if (defined SLJIT_HAVE_CONFIG_PRE && SLJIT_HAVE_CONFIG_PRE) #include "sljitConfigPre.h" #endif /* SLJIT_HAVE_CONFIG_PRE */ #include "sljitConfig.h" /* The following header file defines useful macros for fine tuning sljit based code generators. They are listed in the beginning of sljitConfigInternal.h */ #include "sljitConfigInternal.h" #if (defined SLJIT_HAVE_CONFIG_POST && SLJIT_HAVE_CONFIG_POST) #include "sljitConfigPost.h" #endif /* SLJIT_HAVE_CONFIG_POST */ #ifdef __cplusplus extern "C" { #endif /* --------------------------------------------------------------------- */ /* 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 placeholder architecture. */ #define SLJIT_ERR_UNSUPPORTED 4 /* An ivalid argument is passed to any SLJIT function. */ #define SLJIT_ERR_BAD_ARGUMENT 5 /* Dynamic code modification is not enabled. */ #define SLJIT_ERR_DYN_CODE_MOD 6 /* --------------------------------------------------------------------- */ /* Registers */ /* --------------------------------------------------------------------- */ /* Scratch (R) registers: registers whose may not preserve their values across function calls. Saved (S) registers: registers whose preserve their values across function calls. The scratch and saved register sets are overlap. The last scratch register is the first saved register, the one before the last is the second saved register, and so on. If an architecture provides two scratch and three saved registers, its scratch and saved register sets are the following: R0 | | R0 is always a scratch register R1 | | R1 is always a scratch register [R2] | S2 | R2 and S2 represent the same physical register [R3] | S1 | R3 and S1 represent the same physical register [R4] | S0 | R4 and S0 represent the same physical register Note: SLJIT_NUMBER_OF_SCRATCH_REGISTERS would be 2 and SLJIT_NUMBER_OF_SAVED_REGISTERS would be 3 for this architecture. Note: On all supported architectures SLJIT_NUMBER_OF_REGISTERS >= 12 and SLJIT_NUMBER_OF_SAVED_REGISTERS >= 6. However, 6 registers are virtual on x86-32. See below. The purpose of this definition is convenience: saved registers can be used as extra scratch registers. For example four registers can be specified as scratch registers and the fifth one as saved register on the CPU above and any user code which requires four scratch registers can run unmodified. The SLJIT compiler automatically saves the content of the two extra scratch register on the stack. Scratch registers can also be preserved by saving their value on the stack but this needs to be done manually. Note: To emphasize that registers assigned to R2-R4 are saved registers, they are enclosed by square brackets. Note: sljit_emit_enter and sljit_set_context defines whether a register is S or R register. E.g: when 3 scratches and 1 saved is mapped by sljit_emit_enter, the allowed register set will be: R0-R2 and S0. Although S2 is mapped to the same position as R2, it does not available in the current configuration. Furthermore the S1 register is not available at all. */ /* Scratch registers. */ #define SLJIT_R0 1 #define SLJIT_R1 2 #define SLJIT_R2 3 /* Note: on x86-32, R3 - R6 (same as S3 - S6) are emulated (they are allocated on the stack). These registers are called virtual and cannot be used for memory addressing (cannot be part of any SLJIT_MEM1, SLJIT_MEM2 construct). There is no such limitation on other CPUs. See sljit_get_register_index(). */ #define SLJIT_R3 4 #define SLJIT_R4 5 #define SLJIT_R5 6 #define SLJIT_R6 7 #define SLJIT_R7 8 #define SLJIT_R8 9 #define SLJIT_R9 10 /* All R registers provided by the architecture can be accessed by SLJIT_R(i) The i parameter must be >= 0 and < SLJIT_NUMBER_OF_REGISTERS. */ #define SLJIT_R(i) (1 + (i)) /* Saved registers. */ #define SLJIT_S0 (SLJIT_NUMBER_OF_REGISTERS) #define SLJIT_S1 (SLJIT_NUMBER_OF_REGISTERS - 1) #define SLJIT_S2 (SLJIT_NUMBER_OF_REGISTERS - 2) /* Note: on x86-32, S3 - S6 (same as R3 - R6) are emulated (they are allocated on the stack). These registers are called virtual and cannot be used for memory addressing (cannot be part of any SLJIT_MEM1, SLJIT_MEM2 construct). There is no such limitation on other CPUs. See sljit_get_register_index(). */ #define SLJIT_S3 (SLJIT_NUMBER_OF_REGISTERS - 3) #define SLJIT_S4 (SLJIT_NUMBER_OF_REGISTERS - 4) #define SLJIT_S5 (SLJIT_NUMBER_OF_REGISTERS - 5) #define SLJIT_S6 (SLJIT_NUMBER_OF_REGISTERS - 6) #define SLJIT_S7 (SLJIT_NUMBER_OF_REGISTERS - 7) #define SLJIT_S8 (SLJIT_NUMBER_OF_REGISTERS - 8) #define SLJIT_S9 (SLJIT_NUMBER_OF_REGISTERS - 9) /* All S registers provided by the architecture can be accessed by SLJIT_S(i) The i parameter must be >= 0 and < SLJIT_NUMBER_OF_SAVED_REGISTERS. */ #define SLJIT_S(i) (SLJIT_NUMBER_OF_REGISTERS - (i)) /* Registers >= SLJIT_FIRST_SAVED_REG are saved registers. */ #define SLJIT_FIRST_SAVED_REG (SLJIT_S0 - SLJIT_NUMBER_OF_SAVED_REGISTERS + 1) /* The SLJIT_SP provides direct access to the linear stack space allocated by sljit_emit_enter. It can only be used in the following form: SLJIT_MEM1(SLJIT_SP). The immediate offset is extended by the relative stack offset automatically. The sljit_get_local_base can be used to obtain the absolute offset. */ #define SLJIT_SP (SLJIT_NUMBER_OF_REGISTERS + 1) /* Return with machine word. */ #define SLJIT_RETURN_REG SLJIT_R0 /* --------------------------------------------------------------------- */ /* Floating point registers */ /* --------------------------------------------------------------------- */ /* Each floating point register can store a 32 or a 64 bit precision value. The FR and FS register sets are overlap in the same way as R and S register sets. See above. */ /* Floating point scratch registers. */ #define SLJIT_FR0 1 #define SLJIT_FR1 2 #define SLJIT_FR2 3 #define SLJIT_FR3 4 #define SLJIT_FR4 5 #define SLJIT_FR5 6 /* All FR registers provided by the architecture can be accessed by SLJIT_FR(i) The i parameter must be >= 0 and < SLJIT_NUMBER_OF_FLOAT_REGISTERS. */ #define SLJIT_FR(i) (1 + (i)) /* Floating point saved registers. */ #define SLJIT_FS0 (SLJIT_NUMBER_OF_FLOAT_REGISTERS) #define SLJIT_FS1 (SLJIT_NUMBER_OF_FLOAT_REGISTERS - 1) #define SLJIT_FS2 (SLJIT_NUMBER_OF_FLOAT_REGISTERS - 2) #define SLJIT_FS3 (SLJIT_NUMBER_OF_FLOAT_REGISTERS - 3) #define SLJIT_FS4 (SLJIT_NUMBER_OF_FLOAT_REGISTERS - 4) #define SLJIT_FS5 (SLJIT_NUMBER_OF_FLOAT_REGISTERS - 5) /* All S registers provided by the architecture can be accessed by SLJIT_FS(i) The i parameter must be >= 0 and < SLJIT_NUMBER_OF_SAVED_FLOAT_REGISTERS. */ #define SLJIT_FS(i) (SLJIT_NUMBER_OF_FLOAT_REGISTERS - (i)) /* Float registers >= SLJIT_FIRST_SAVED_FLOAT_REG are saved registers. */ #define SLJIT_FIRST_SAVED_FLOAT_REG (SLJIT_FS0 - SLJIT_NUMBER_OF_SAVED_FLOAT_REGISTERS + 1) /* --------------------------------------------------------------------- */ /* Argument type definitions */ /* --------------------------------------------------------------------- */ /* The following argument type definitions are used by sljit_emit_enter, sljit_set_context, sljit_emit_call, and sljit_emit_icall functions. As for sljit_emit_call and sljit_emit_icall, the first integer argument must be placed into SLJIT_R0, the second one into SLJIT_R1, and so on. Similarly the first floating point argument must be placed into SLJIT_FR0, the second one into SLJIT_FR1, and so on. As for sljit_emit_enter, the integer arguments can be stored in scratch or saved registers. The first integer argument without _R postfix is stored in SLJIT_S0, the next one in SLJIT_S1, and so on. The integer arguments with _R postfix are placed into scratch registers. The index of the scratch register is the count of the previous integer arguments starting from SLJIT_R0. The floating point arguments are always placed into SLJIT_FR0, SLJIT_FR1, and so on. Note: if a function is called by sljit_emit_call/sljit_emit_icall and an argument is stored in a scratch register by sljit_emit_enter, that argument uses the same scratch register index for both integer and floating point arguments. Example function definition: sljit_f32 SLJIT_FUNC example_c_callback(void *arg_a, sljit_f64 arg_b, sljit_u32 arg_c, sljit_f32 arg_d); Argument type definition: SLJIT_ARG_RETURN(SLJIT_ARG_TYPE_F32) | SLJIT_ARG_VALUE(SLJIT_ARG_TYPE_P, 1) | SLJIT_ARG_VALUE(SLJIT_ARG_TYPE_F64, 2) | SLJIT_ARG_VALUE(SLJIT_ARG_TYPE_32, 3) | SLJIT_ARG_VALUE(SLJIT_ARG_TYPE_F32, 4) Short form of argument type definition: SLJIT_ARGS4(32, P, F64, 32, F32) Argument passing: arg_a must be placed in SLJIT_R0 arg_c must be placed in SLJIT_R1 arg_b must be placed in SLJIT_FR0 arg_d must be placed in SLJIT_FR1 Examples for argument processing by sljit_emit_enter: SLJIT_ARGS4(VOID, P, 32_R, F32, W) Arguments are placed into: SLJIT_S0, SLJIT_R1, SLJIT_FR0, SLJIT_S1 SLJIT_ARGS4(VOID, W, W_R, W, W_R) Arguments are placed into: SLJIT_S0, SLJIT_R1, SLJIT_S1, SLJIT_R3 SLJIT_ARGS4(VOID, F64, W, F32, W_R) Arguments are placed into: SLJIT_FR0, SLJIT_S0, SLJIT_FR1, SLJIT_R1 Note: it is recommended to pass the scratch arguments first followed by the saved arguments: SLJIT_ARGS4(VOID, W_R, W_R, W, W) Arguments are placed into: SLJIT_R0, SLJIT_R1, SLJIT_S0, SLJIT_S1 */ /* The following flag is only allowed for the integer arguments of sljit_emit_enter. When the flag is set, the integer argument is stored in a scratch register instead of a saved register. */ #define SLJIT_ARG_TYPE_SCRATCH_REG 0x8 /* Void result, can only be used by SLJIT_ARG_RETURN. */ #define SLJIT_ARG_TYPE_VOID 0 /* Machine word sized integer argument or result. */ #define SLJIT_ARG_TYPE_W 1 #define SLJIT_ARG_TYPE_W_R (SLJIT_ARG_TYPE_W | SLJIT_ARG_TYPE_SCRATCH_REG) /* 32 bit integer argument or result. */ #define SLJIT_ARG_TYPE_32 2 #define SLJIT_ARG_TYPE_32_R (SLJIT_ARG_TYPE_32 | SLJIT_ARG_TYPE_SCRATCH_REG) /* Pointer sized integer argument or result. */ #define SLJIT_ARG_TYPE_P 3 #define SLJIT_ARG_TYPE_P_R (SLJIT_ARG_TYPE_P | SLJIT_ARG_TYPE_SCRATCH_REG) /* 64 bit floating point argument or result. */ #define SLJIT_ARG_TYPE_F64 4 /* 32 bit floating point argument or result. */ #define SLJIT_ARG_TYPE_F32 5 #define SLJIT_ARG_SHIFT 4 #define SLJIT_ARG_RETURN(type) (type) #define SLJIT_ARG_VALUE(type, idx) ((type) << ((idx) * SLJIT_ARG_SHIFT)) /* Simplified argument list definitions. The following definition: SLJIT_ARG_RETURN(SLJIT_ARG_TYPE_W) | SLJIT_ARG_VALUE(SLJIT_ARG_TYPE_F32, 1) can be shortened to: SLJIT_ARGS1(W, F32) */ #define SLJIT_ARG_TO_TYPE(type) SLJIT_ARG_TYPE_ ## type #define SLJIT_ARGS0(ret) \ SLJIT_ARG_RETURN(SLJIT_ARG_TO_TYPE(ret)) #define SLJIT_ARGS1(ret, arg1) \ (SLJIT_ARGS0(ret) | SLJIT_ARG_VALUE(SLJIT_ARG_TO_TYPE(arg1), 1)) #define SLJIT_ARGS2(ret, arg1, arg2) \ (SLJIT_ARGS1(ret, arg1) | SLJIT_ARG_VALUE(SLJIT_ARG_TO_TYPE(arg2), 2)) #define SLJIT_ARGS3(ret, arg1, arg2, arg3) \ (SLJIT_ARGS2(ret, arg1, arg2) | SLJIT_ARG_VALUE(SLJIT_ARG_TO_TYPE(arg3), 3)) #define SLJIT_ARGS4(ret, arg1, arg2, arg3, arg4) \ (SLJIT_ARGS3(ret, arg1, arg2, arg3) | SLJIT_ARG_VALUE(SLJIT_ARG_TO_TYPE(arg4), 4)) /* --------------------------------------------------------------------- */ /* Main structures and functions */ /* --------------------------------------------------------------------- */ /* The following structures are private, and can be changed in the future. Keeping them here allows code inlining. */ struct sljit_memory_fragment { struct sljit_memory_fragment *next; sljit_uw used_size; /* Must be aligned to sljit_sw. */ sljit_u8 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_uw flags; union { sljit_uw target; struct sljit_label *label; } u; }; struct sljit_put_label { struct sljit_put_label *next; struct sljit_label *label; sljit_uw addr; sljit_uw flags; }; struct sljit_const { struct sljit_const *next; sljit_uw addr; }; struct sljit_compiler { sljit_s32 error; sljit_s32 options; struct sljit_label *labels; struct sljit_jump *jumps; struct sljit_put_label *put_labels; struct sljit_const *consts; struct sljit_label *last_label; struct sljit_jump *last_jump; struct sljit_const *last_const; struct sljit_put_label *last_put_label; void *allocator_data; void *exec_allocator_data; struct sljit_memory_fragment *buf; struct sljit_memory_fragment *abuf; /* Used scratch registers. */ sljit_s32 scratches; /* Used saved registers. */ sljit_s32 saveds; /* Used float scratch registers. */ sljit_s32 fscratches; /* Used float saved registers. */ sljit_s32 fsaveds; /* Local stack size. */ sljit_s32 local_size; /* Code size. */ sljit_uw size; /* Relative offset of the executable mapping from the writable mapping. */ sljit_sw executable_offset; /* Executable size for statistical purposes. */ sljit_uw executable_size; #if (defined SLJIT_HAS_STATUS_FLAGS_STATE && SLJIT_HAS_STATUS_FLAGS_STATE) sljit_s32 status_flags_state; #endif #if (defined SLJIT_CONFIG_X86_32 && SLJIT_CONFIG_X86_32) sljit_s32 args_size; sljit_s32 locals_offset; sljit_s32 scratches_offset; #endif #if (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64) sljit_s32 mode32; #endif #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5) /* Constant pool handling. */ sljit_uw *cpool; sljit_u8 *cpool_unique; sljit_uw cpool_diff; sljit_uw cpool_fill; /* Other members. */ /* 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; #endif /* SLJIT_CONFIG_ARM_V5 || SLJIT_CONFIG_ARM_V7 */ #if (defined SLJIT_CONFIG_ARM_32 && SLJIT_CONFIG_ARM_32) && (defined __SOFTFP__) sljit_uw args_size; #endif #if (defined SLJIT_CONFIG_PPC && SLJIT_CONFIG_PPC) sljit_u32 imm; #endif #if (defined SLJIT_CONFIG_MIPS && SLJIT_CONFIG_MIPS) sljit_s32 delay_slot; sljit_s32 cache_arg; sljit_sw cache_argw; #endif #if (defined SLJIT_CONFIG_MIPS_32 && SLJIT_CONFIG_MIPS_32) sljit_uw args_size; #endif #if (defined SLJIT_CONFIG_SPARC_32 && SLJIT_CONFIG_SPARC_32) sljit_s32 delay_slot; sljit_s32 cache_arg; sljit_sw cache_argw; #endif #if (defined SLJIT_CONFIG_S390X && SLJIT_CONFIG_S390X) /* Need to allocate register save area to make calls. */ sljit_s32 mode; #endif #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) FILE* verbose; #endif #if (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS) \ || (defined SLJIT_DEBUG && SLJIT_DEBUG) /* Flags specified by the last arithmetic instruction. It contains the type of the variable flag. */ sljit_s32 last_flags; /* Return value type set by entry functions. */ sljit_s32 last_return; /* Local size passed to entry functions. */ sljit_s32 logical_local_size; #endif #if (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS) \ || (defined SLJIT_DEBUG && SLJIT_DEBUG) \ || (defined SLJIT_VERBOSE && SLJIT_VERBOSE) /* Trust arguments when the API function is called. */ sljit_s32 skip_checks; #endif }; /* --------------------------------------------------------------------- */ /* Main functions */ /* --------------------------------------------------------------------- */ /* Creates an sljit compiler. The allocator_data is required by some custom memory managers. This pointer is passed to SLJIT_MALLOC and SLJIT_FREE macros. Most allocators (including the default one) ignores this value, and it is recommended to pass NULL as a dummy value for allocator_data. The exec_allocator_data has the same purpose but this one is passed to SLJIT_MALLOC_EXEC / SLJIT_MALLOC_FREE functions. Returns NULL if failed. */ SLJIT_API_FUNC_ATTRIBUTE struct sljit_compiler* sljit_create_compiler(void *allocator_data, void *exec_allocator_data); /* Frees everything except the compiled machine code. */ SLJIT_API_FUNC_ATTRIBUTE void sljit_free_compiler(struct sljit_compiler *compiler); /* Returns the current error code. If an error is occurred, future sljit calls which uses the same compiler argument returns early with the same error code. Thus there is no need for checking the error after every call, it is enough to do it before the code is compiled. Removing these checks increases the performance of the compiling process. */ static SLJIT_INLINE sljit_s32 sljit_get_compiler_error(struct sljit_compiler *compiler) { return compiler->error; } /* Sets the compiler error code to SLJIT_ERR_ALLOC_FAILED except if an error was detected before. After the error code is set the compiler behaves as if the allocation failure happened during an sljit function call. This can greatly simplify error checking, since only the compiler status needs to be checked after the compilation. */ SLJIT_API_FUNC_ATTRIBUTE void sljit_set_compiler_memory_error(struct sljit_compiler *compiler); /* 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_sw) 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. However, this return value does not indicate that there is no more memory (does not set the current error code of the compiler to out-of-memory status). */ SLJIT_API_FUNC_ATTRIBUTE void* sljit_alloc_memory(struct sljit_compiler *compiler, sljit_s32 size); #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) /* Passing NULL disables verbose. */ SLJIT_API_FUNC_ATTRIBUTE void sljit_compiler_verbose(struct sljit_compiler *compiler, FILE* verbose); #endif /* Create executable code from the sljit instruction stream. This is the final step of the code generation so no more instructions can be added after this call. */ SLJIT_API_FUNC_ATTRIBUTE void* sljit_generate_code(struct sljit_compiler *compiler); /* Free executable code. */ SLJIT_API_FUNC_ATTRIBUTE void sljit_free_code(void* code, void *exec_allocator_data); /* When the protected executable allocator is used the JIT code is mapped twice. The first mapping has read/write and the second mapping has read/exec permissions. This function returns with the relative offset of the executable mapping using the writable mapping as the base after the machine code is successfully generated. The returned value is always 0 for the normal executable allocator, since it uses only one mapping with read/write/exec permissions. Dynamic code modifications requires this value. Before a successful code generation, this function returns with 0. */ static SLJIT_INLINE sljit_sw sljit_get_executable_offset(struct sljit_compiler *compiler) { return compiler->executable_offset; } /* The executable memory consumption of the generated code can be retrieved by this function. The returned value can be used for statistical purposes. Before a successful code generation, this function returns with 0. */ static SLJIT_INLINE sljit_uw sljit_get_generated_code_size(struct sljit_compiler *compiler) { return compiler->executable_size; } /* Returns with non-zero if the feature or limitation type passed as its argument is present on the current CPU. Some features (e.g. floating point operations) require hardware (CPU) support while others (e.g. move with update) are emulated if not available. However even if a feature is emulated, specialized code paths can be faster than the emulation. Some limitations are emulated as well so their general case is supported but it has extra performance costs. */ /* [Not emulated] Floating-point support is available. */ #define SLJIT_HAS_FPU 0 /* [Limitation] Some registers are virtual registers. */ #define SLJIT_HAS_VIRTUAL_REGISTERS 1 /* [Emulated] Has zero register (setting a memory location to zero is efficient). */ #define SLJIT_HAS_ZERO_REGISTER 2 /* [Emulated] Count leading zero is supported. */ #define SLJIT_HAS_CLZ 3 /* [Emulated] Conditional move is supported. */ #define SLJIT_HAS_CMOV 4 /* [Emulated] Conditional move is supported. */ #define SLJIT_HAS_PREFETCH 5 #if (defined SLJIT_CONFIG_X86 && SLJIT_CONFIG_X86) /* [Not emulated] SSE2 support is available on x86. */ #define SLJIT_HAS_SSE2 100 #endif SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_has_cpu_feature(sljit_s32 feature_type); /* Instruction generation. Returns with any error code. If there is no error, they return with SLJIT_SUCCESS. */ /* The executable code is a function from the viewpoint of the C language. The function calls must obey to the ABI (Application Binary Interface) of the platform, which specify the purpose of machine registers and stack handling among other things. The sljit_emit_enter function emits the necessary instructions for setting up a new context for the executable code and moves function arguments to the saved registers. Furthermore the options argument can be used to pass configuration options to the compiler. The available options are listed before sljit_emit_enter. The function argument list is the combination of SLJIT_ARGx (SLJIT_DEF_ARG1) macros. Currently maximum 4 arguments are supported. The first integer argument is loaded into SLJIT_S0, the second one is loaded into SLJIT_S1, and so on. Similarly, the first floating point argument is loaded into SLJIT_FR0, the second one is loaded into SLJIT_FR1, and so on. Furthermore the register set used by the function must be declared as well. The number of scratch and saved registers used by the function must be passed to sljit_emit_enter. Only R registers between R0 and "scratches" argument can be used later. E.g. if "scratches" is set to 2, the scratch register set will be limited to SLJIT_R0 and SLJIT_R1. The S registers and the floating point registers ("fscratches" and "fsaveds") are specified in a similar manner. The sljit_emit_enter is also capable of allocating a stack space for local variables. The "local_size" argument contains the size in bytes of this local area and its staring address is stored in SLJIT_SP. The memory area between SLJIT_SP (inclusive) and SLJIT_SP + local_size (exclusive) can be modified freely until the function returns. The stack space is not initialized. Note: the following conditions must met: 0 <= scratches <= SLJIT_NUMBER_OF_REGISTERS 0 <= saveds <= SLJIT_NUMBER_OF_SAVED_REGISTERS scratches + saveds <= SLJIT_NUMBER_OF_REGISTERS 0 <= fscratches <= SLJIT_NUMBER_OF_FLOAT_REGISTERS 0 <= fsaveds <= SLJIT_NUMBER_OF_SAVED_FLOAT_REGISTERS fscratches + fsaveds <= SLJIT_NUMBER_OF_FLOAT_REGISTERS Note: the compiler can use saved registers as scratch registers, but the opposite is not supported Note: every call of sljit_emit_enter and sljit_set_context overwrites the previous context. */ /* The compiled function uses cdecl calling * convention instead of SLJIT_FUNC. */ #define SLJIT_ENTER_CDECL 0x00000001 /* The local_size must be >= 0 and <= SLJIT_MAX_LOCAL_SIZE. */ #define SLJIT_MAX_LOCAL_SIZE 65536 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_enter(struct sljit_compiler *compiler, sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds, sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size); /* The machine code has a context (which contains the local stack space size, number of used registers, etc.) which initialized by sljit_emit_enter. Several functions (such as sljit_emit_return) requres this context to be able to generate the appropriate code. However, some code fragments (like inline cache) may have no normal entry point so their context is unknown for the compiler. Their context can be provided to the compiler by the sljit_set_context function. Note: every call of sljit_emit_enter and sljit_set_context overwrites the previous context. */ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_set_context(struct sljit_compiler *compiler, sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds, sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size); /* Return from machine code. The sljit_emit_return_void function does not return with any value. The sljit_emit_return function returns with a single value which stores the result of a data move instruction. The instruction is specified by the op argument, and must be between SLJIT_MOV and SLJIT_MOV_P (see sljit_emit_op1). */ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return_void(struct sljit_compiler *compiler); SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 src, sljit_sw srcw); /* Generating entry and exit points for fast call functions (see SLJIT_FAST_CALL). Both sljit_emit_fast_enter and SLJIT_FAST_RETURN operations preserve the values of all registers and stack frame. The return address is stored in the dst argument of sljit_emit_fast_enter, and this return address can be passed to SLJIT_FAST_RETURN to continue the execution after the fast call. Fast calls are cheap operations (usually only a single call instruction is emitted) but they do not preserve any registers. However the callee function can freely use / update any registers and stack values which can be efficiently exploited by various optimizations. Registers can be saved manually by the callee function if needed. Although returning to different address by SLJIT_FAST_RETURN is possible, this address usually cannot be predicted by the return address predictor of modern CPUs which may reduce performance. Furthermore certain security enhancement technologies such as Intel Control-flow Enforcement Technology (CET) may disallow returning to a different address. Flags: - (does not modify flags). */ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw); /* Source and destination operands 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_sw) array access (fully supported by both x86 and ARM architectures, and cheap operation on others) */ /* IMPORTANT NOTE: memory access MUST be naturally aligned unless SLJIT_UNALIGNED macro is defined and its value is 1. length | alignment ---------+----------- byte | 1 byte (any physical_address is accepted) half | 2 byte (physical_address & 0x1 == 0) int | 4 byte (physical_address & 0x3 == 0) word | 4 byte if SLJIT_32BIT_ARCHITECTURE is defined and its value is 1 | 8 byte if SLJIT_64BIT_ARCHITECTURE is defined and its value is 1 pointer | size of sljit_p type (4 byte on 32 bit machines, 4 or 8 byte | on 64 bit machines) Note: Different architectures have different addressing limitations. A single instruction is enough for the following addressing modes. Other adrressing modes are emulated by instruction sequences. This information could help to improve those code generators which focuses only a few architectures. x86: [reg+imm], -2^32+1 <= imm <= 2^32-1 (full address space on x86-32) [reg+(reg<<imm)] is supported [imm], -2^32+1 <= imm <= 2^32-1 is supported Write-back is not supported arm: [reg+imm], -4095 <= imm <= 4095 or -255 <= imm <= 255 for signed bytes, any halfs or floating point values) [reg+(reg<<imm)] is supported Write-back is supported arm-t2: [reg+imm], -255 <= imm <= 4095 [reg+(reg<<imm)] is supported Write back is supported only for [reg+imm], where -255 <= imm <= 255 arm64: [reg+imm], -256 <= imm <= 255, 0 <= aligned imm <= 4095 * alignment [reg+(reg<<imm)] is supported Write back is supported only for [reg+imm], where -256 <= imm <= 255 ppc: [reg+imm], -65536 <= imm <= 65535. 64 bit loads/stores and 32 bit signed load on 64 bit requires immediates divisible by 4. [reg+imm] is not supported for signed 8 bit values. [reg+reg] is supported Write-back is supported except for one instruction: 32 bit signed load with [reg+imm] addressing mode on 64 bit. mips: [reg+imm], -65536 <= imm <= 65535 sparc: [reg+imm], -4096 <= imm <= 4095 [reg+reg] is supported s390x: [reg+imm], -2^19 <= imm < 2^19 [reg+reg] is supported Write-back is not supported */ /* Macros for specifying operand types. */ #define SLJIT_MEM 0x80 #define SLJIT_MEM0() (SLJIT_MEM) #define SLJIT_MEM1(r1) (SLJIT_MEM | (r1)) #define SLJIT_MEM2(r1, r2) (SLJIT_MEM | (r1) | ((r2) << 8)) #define SLJIT_IMM 0x40 /* Sets 32 bit operation mode on 64 bit CPUs. This option is ignored on 32 bit CPUs. When this option is set for an arithmetic operation, only the lower 32 bit of the input registers are used, and the CPU status flags are set according to the 32 bit result. Although the higher 32 bit of the input and the result registers are not defined by SLJIT, it might be defined by the CPU architecture (e.g. MIPS). To satisfy these CPU requirements all source registers must be the result of those operations where this option was also set. Memory loads read 32 bit values rather than 64 bit ones. In other words 32 bit and 64 bit operations cannot be mixed. The only exception is SLJIT_MOV32 whose source register can hold any 32 or 64 bit value, and it is converted to a 32 bit compatible format first. This conversion is free (no instructions are emitted) on most CPUs. A 32 bit value can also be converted to a 64 bit value by SLJIT_MOV_S32 (sign extension) or SLJIT_MOV_U32 (zero extension). As for floating-point operations, this option sets 32 bit single precision mode. Similar to the integer operations, all register arguments must be the result of those operations where this option was also set. Note: memory addressing always uses 64 bit values on 64 bit systems so the result of a 32 bit operation must not be used with SLJIT_MEMx macros. This option is part of the instruction name, so there is no need to manually set it. E.g: SLJIT_ADD32 == (SLJIT_ADD | SLJIT_32) */ #define SLJIT_32 0x100 /* Many CPUs (x86, ARM, PPC) have status flags which can be set according to the result of an operation. Other CPUs (MIPS) do not have status flags, and results must be stored in registers. To cover both architecture types efficiently only two flags are defined by SLJIT: * Zero (equal) flag: it is set if the result is zero * Variable flag: its value is defined by the last arithmetic operation SLJIT instructions can set any or both of these flags. The value of these flags is undefined if the instruction does not specify their value. The description of each instruction contains the list of allowed flag types. Example: SLJIT_ADD can set the Z, OVERFLOW, CARRY flags hence sljit_op2(..., SLJIT_ADD, ...) Both the zero and variable flags are undefined so they can have any value after the operation is completed. sljit_op2(..., SLJIT_ADD | SLJIT_SET_Z, ...) Sets the zero flag if the result is zero, clears it otherwise. The variable flag is undefined. sljit_op2(..., SLJIT_ADD | SLJIT_SET_OVERFLOW, ...) Sets the variable flag if an integer overflow occurs, clears it otherwise. The zero flag is undefined. sljit_op2(..., SLJIT_ADD | SLJIT_SET_Z | SLJIT_SET_CARRY, ...) Sets the zero flag if the result is zero, clears it otherwise. Sets the variable flag if unsigned overflow (carry) occurs, clears it otherwise. If an instruction (e.g. SLJIT_MOV) does not modify flags the flags are unchanged. Using these flags can reduce the number of emitted instructions. E.g. a fast loop can be implemented by decreasing a counter register and set the zero flag to jump back if the counter register has not reached zero. Motivation: although CPUs can set a large number of flags, usually their values are ignored or only one of them is used. Emulating a large number of flags on systems without flag register is complicated so SLJIT instructions must specify the flag they want to use and only that flag will be emulated. The last arithmetic instruction can be repeated if multiple flags need to be checked. */ /* Set Zero status flag. */ #define SLJIT_SET_Z 0x0200 /* Set the variable status flag if condition is true. See comparison types. */ #define SLJIT_SET(condition) ((condition) << 10) /* 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'. */ /* Starting index of opcodes for sljit_emit_op0. */ #define SLJIT_OP0_BASE 0 /* Flags: - (does not modify flags) Note: breakpoint instruction is not supported by all architectures (e.g. ppc) It falls back to SLJIT_NOP in those cases. */ #define SLJIT_BREAKPOINT (SLJIT_OP0_BASE + 0) /* Flags: - (does not modify flags) Note: may or may not cause an extra cycle wait it can even decrease the runtime in a few cases. */ #define SLJIT_NOP (SLJIT_OP0_BASE + 1) /* Flags: - (may destroy flags) Unsigned multiplication of SLJIT_R0 and SLJIT_R1. Result is placed into SLJIT_R1:SLJIT_R0 (high:low) word */ #define SLJIT_LMUL_UW (SLJIT_OP0_BASE + 2) /* Flags: - (may destroy flags) Signed multiplication of SLJIT_R0 and SLJIT_R1. Result is placed into SLJIT_R1:SLJIT_R0 (high:low) word */ #define SLJIT_LMUL_SW (SLJIT_OP0_BASE + 3) /* Flags: - (may destroy flags) Unsigned divide of the value in SLJIT_R0 by the value in SLJIT_R1. The result is placed into SLJIT_R0 and the remainder into SLJIT_R1. Note: if SLJIT_R1 is 0, the behaviour is undefined. */ #define SLJIT_DIVMOD_UW (SLJIT_OP0_BASE + 4) #define SLJIT_DIVMOD_U32 (SLJIT_DIVMOD_UW | SLJIT_32) /* Flags: - (may destroy flags) Signed divide of the value in SLJIT_R0 by the value in SLJIT_R1. The result is placed into SLJIT_R0 and the remainder into SLJIT_R1. Note: if SLJIT_R1 is 0, the behaviour is undefined. Note: if SLJIT_R1 is -1 and SLJIT_R0 is integer min (0x800..00), the behaviour is undefined. */ #define SLJIT_DIVMOD_SW (SLJIT_OP0_BASE + 5) #define SLJIT_DIVMOD_S32 (SLJIT_DIVMOD_SW | SLJIT_32) /* Flags: - (may destroy flags) Unsigned divide of the value in SLJIT_R0 by the value in SLJIT_R1. The result is placed into SLJIT_R0. SLJIT_R1 preserves its value. Note: if SLJIT_R1 is 0, the behaviour is undefined. */ #define SLJIT_DIV_UW (SLJIT_OP0_BASE + 6) #define SLJIT_DIV_U32 (SLJIT_DIV_UW | SLJIT_32) /* Flags: - (may destroy flags) Signed divide of the value in SLJIT_R0 by the value in SLJIT_R1. The result is placed into SLJIT_R0. SLJIT_R1 preserves its value. Note: if SLJIT_R1 is 0, the behaviour is undefined. Note: if SLJIT_R1 is -1 and SLJIT_R0 is integer min (0x800..00), the behaviour is undefined. */ #define SLJIT_DIV_SW (SLJIT_OP0_BASE + 7) #define SLJIT_DIV_S32 (SLJIT_DIV_SW | SLJIT_32) /* Flags: - (does not modify flags) ENDBR32 instruction for x86-32 and ENDBR64 instruction for x86-64 when Intel Control-flow Enforcement Technology (CET) is enabled. No instruction for other architectures. */ #define SLJIT_ENDBR (SLJIT_OP0_BASE + 8) /* Flags: - (may destroy flags) Skip stack frames before return. */ #define SLJIT_SKIP_FRAMES_BEFORE_RETURN (SLJIT_OP0_BASE + 9) SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op0(struct sljit_compiler *compiler, sljit_s32 op); /* Starting index of opcodes for sljit_emit_op1. */ #define SLJIT_OP1_BASE 32 /* The MOV instruction transfers data from source to destination. MOV instruction suffixes: U8 - unsigned 8 bit data transfer S8 - signed 8 bit data transfer U16 - unsigned 16 bit data transfer S16 - signed 16 bit data transfer U32 - unsigned int (32 bit) data transfer S32 - signed int (32 bit) data transfer P - pointer (sljit_p) data transfer */ /* Flags: - (does not modify flags) */ #define SLJIT_MOV (SLJIT_OP1_BASE + 0) /* Flags: - (does not modify flags) */ #define SLJIT_MOV_U8 (SLJIT_OP1_BASE + 1) #define SLJIT_MOV32_U8 (SLJIT_MOV_U8 | SLJIT_32) /* Flags: - (does not modify flags) */ #define SLJIT_MOV_S8 (SLJIT_OP1_BASE + 2) #define SLJIT_MOV32_S8 (SLJIT_MOV_S8 | SLJIT_32) /* Flags: - (does not modify flags) */ #define SLJIT_MOV_U16 (SLJIT_OP1_BASE + 3) #define SLJIT_MOV32_U16 (SLJIT_MOV_U16 | SLJIT_32) /* Flags: - (does not modify flags) */ #define SLJIT_MOV_S16 (SLJIT_OP1_BASE + 4) #define SLJIT_MOV32_S16 (SLJIT_MOV_S16 | SLJIT_32) /* Flags: - (does not modify flags) Note: no SLJIT_MOV32_U32 form, since it is the same as SLJIT_MOV32 */ #define SLJIT_MOV_U32 (SLJIT_OP1_BASE + 5) /* Flags: - (does not modify flags) Note: no SLJIT_MOV32_S32 form, since it is the same as SLJIT_MOV32 */ #define SLJIT_MOV_S32 (SLJIT_OP1_BASE + 6) /* Flags: - (does not modify flags) */ #define SLJIT_MOV32 (SLJIT_OP1_BASE + 7) /* Flags: - (does not modify flags) Note: load a pointer sized data, useful on x32 (a 32 bit mode on x86-64 where all x64 features are available, e.g. 16 register) or similar compiling modes */ #define SLJIT_MOV_P (SLJIT_OP1_BASE + 8) /* Flags: Z Note: immediate source argument is not supported */ #define SLJIT_NOT (SLJIT_OP1_BASE + 9) #define SLJIT_NOT32 (SLJIT_NOT | SLJIT_32) /* Count leading zeroes Flags: - (may destroy flags) Note: immediate source argument is not supported */ #define SLJIT_CLZ (SLJIT_OP1_BASE + 10) #define SLJIT_CLZ32 (SLJIT_CLZ | SLJIT_32) SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op1(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 dst, sljit_sw dstw, sljit_s32 src, sljit_sw srcw); /* Starting index of opcodes for sljit_emit_op2. */ #define SLJIT_OP2_BASE 96 /* Flags: Z | OVERFLOW | CARRY */ #define SLJIT_ADD (SLJIT_OP2_BASE + 0) #define SLJIT_ADD32 (SLJIT_ADD | SLJIT_32) /* Flags: CARRY */ #define SLJIT_ADDC (SLJIT_OP2_BASE + 1) #define SLJIT_ADDC32 (SLJIT_ADDC | SLJIT_32) /* Flags: Z | LESS | GREATER_EQUAL | GREATER | LESS_EQUAL SIG_LESS | SIG_GREATER_EQUAL | SIG_GREATER SIG_LESS_EQUAL | CARRY */ #define SLJIT_SUB (SLJIT_OP2_BASE + 2) #define SLJIT_SUB32 (SLJIT_SUB | SLJIT_32) /* Flags: CARRY */ #define SLJIT_SUBC (SLJIT_OP2_BASE + 3) #define SLJIT_SUBC32 (SLJIT_SUBC | SLJIT_32) /* Note: integer mul Flags: OVERFLOW */ #define SLJIT_MUL (SLJIT_OP2_BASE + 4) #define SLJIT_MUL32 (SLJIT_MUL | SLJIT_32) /* Flags: Z */ #define SLJIT_AND (SLJIT_OP2_BASE + 5) #define SLJIT_AND32 (SLJIT_AND | SLJIT_32) /* Flags: Z */ #define SLJIT_OR (SLJIT_OP2_BASE + 6) #define SLJIT_OR32 (SLJIT_OR | SLJIT_32) /* Flags: Z */ #define SLJIT_XOR (SLJIT_OP2_BASE + 7) #define SLJIT_XOR32 (SLJIT_XOR | SLJIT_32) /* Flags: Z Let bit_length be the length of the shift operation: 32 or 64. If src2 is immediate, src2w is masked by (bit_length - 1). Otherwise, if the content of src2 is outside the range from 0 to bit_length - 1, the result is undefined. */ #define SLJIT_SHL (SLJIT_OP2_BASE + 8) #define SLJIT_SHL32 (SLJIT_SHL | SLJIT_32) /* Flags: Z Let bit_length be the length of the shift operation: 32 or 64. If src2 is immediate, src2w is masked by (bit_length - 1). Otherwise, if the content of src2 is outside the range from 0 to bit_length - 1, the result is undefined. */ #define SLJIT_LSHR (SLJIT_OP2_BASE + 9) #define SLJIT_LSHR32 (SLJIT_LSHR | SLJIT_32) /* Flags: Z Let bit_length be the length of the shift operation: 32 or 64. If src2 is immediate, src2w is masked by (bit_length - 1). Otherwise, if the content of src2 is outside the range from 0 to bit_length - 1, the result is undefined. */ #define SLJIT_ASHR (SLJIT_OP2_BASE + 10) #define SLJIT_ASHR32 (SLJIT_ASHR | SLJIT_32) SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op2(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 dst, sljit_sw dstw, sljit_s32 src1, sljit_sw src1w, sljit_s32 src2, sljit_sw src2w); /* The sljit_emit_op2u function is the same as sljit_emit_op2 except the result is discarded. */ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op2u(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 src1, sljit_sw src1w, sljit_s32 src2, sljit_sw src2w); /* Starting index of opcodes for sljit_emit_op2. */ #define SLJIT_OP_SRC_BASE 128 /* Note: src cannot be an immedate value Flags: - (does not modify flags) */ #define SLJIT_FAST_RETURN (SLJIT_OP_SRC_BASE + 0) /* Skip stack frames before fast return. Note: src cannot be an immedate value Flags: may destroy flags. */ #define SLJIT_SKIP_FRAMES_BEFORE_FAST_RETURN (SLJIT_OP_SRC_BASE + 1) /* Prefetch value into the level 1 data cache Note: if the target CPU does not support data prefetch, no instructions are emitted. Note: this instruction never fails, even if the memory address is invalid. Flags: - (does not modify flags) */ #define SLJIT_PREFETCH_L1 (SLJIT_OP_SRC_BASE + 2) /* Prefetch value into the level 2 data cache Note: same as SLJIT_PREFETCH_L1 if the target CPU does not support this instruction form. Note: this instruction never fails, even if the memory address is invalid. Flags: - (does not modify flags) */ #define SLJIT_PREFETCH_L2 (SLJIT_OP_SRC_BASE + 3) /* Prefetch value into the level 3 data cache Note: same as SLJIT_PREFETCH_L2 if the target CPU does not support this instruction form. Note: this instruction never fails, even if the memory address is invalid. Flags: - (does not modify flags) */ #define SLJIT_PREFETCH_L3 (SLJIT_OP_SRC_BASE + 4) /* Prefetch a value which is only used once (and can be discarded afterwards) Note: same as SLJIT_PREFETCH_L1 if the target CPU does not support this instruction form. Note: this instruction never fails, even if the memory address is invalid. Flags: - (does not modify flags) */ #define SLJIT_PREFETCH_ONCE (SLJIT_OP_SRC_BASE + 5) SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_src(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 src, sljit_sw srcw); /* Starting index of opcodes for sljit_emit_fop1. */ #define SLJIT_FOP1_BASE 160 /* Flags: - (does not modify flags) */ #define SLJIT_MOV_F64 (SLJIT_FOP1_BASE + 0) #define SLJIT_MOV_F32 (SLJIT_MOV_F64 | SLJIT_32) /* Convert opcodes: CONV[DST_TYPE].FROM[SRC_TYPE] SRC/DST TYPE can be: D - double, S - single, W - signed word, I - signed int Rounding mode when the destination is W or I: round towards zero. */ /* Flags: - (may destroy flags) */ #define SLJIT_CONV_F64_FROM_F32 (SLJIT_FOP1_BASE + 1) #define SLJIT_CONV_F32_FROM_F64 (SLJIT_CONV_F64_FROM_F32 | SLJIT_32) /* Flags: - (may destroy flags) */ #define SLJIT_CONV_SW_FROM_F64 (SLJIT_FOP1_BASE + 2) #define SLJIT_CONV_SW_FROM_F32 (SLJIT_CONV_SW_FROM_F64 | SLJIT_32) /* Flags: - (may destroy flags) */ #define SLJIT_CONV_S32_FROM_F64 (SLJIT_FOP1_BASE + 3) #define SLJIT_CONV_S32_FROM_F32 (SLJIT_CONV_S32_FROM_F64 | SLJIT_32) /* Flags: - (may destroy flags) */ #define SLJIT_CONV_F64_FROM_SW (SLJIT_FOP1_BASE + 4) #define SLJIT_CONV_F32_FROM_SW (SLJIT_CONV_F64_FROM_SW | SLJIT_32) /* Flags: - (may destroy flags) */ #define SLJIT_CONV_F64_FROM_S32 (SLJIT_FOP1_BASE + 5) #define SLJIT_CONV_F32_FROM_S32 (SLJIT_CONV_F64_FROM_S32 | SLJIT_32) /* Note: dst is the left and src is the right operand for SLJIT_CMPD. Flags: EQUAL_F | LESS_F | GREATER_EQUAL_F | GREATER_F | LESS_EQUAL_F */ #define SLJIT_CMP_F64 (SLJIT_FOP1_BASE + 6) #define SLJIT_CMP_F32 (SLJIT_CMP_F64 | SLJIT_32) /* Flags: - (may destroy flags) */ #define SLJIT_NEG_F64 (SLJIT_FOP1_BASE + 7) #define SLJIT_NEG_F32 (SLJIT_NEG_F64 | SLJIT_32) /* Flags: - (may destroy flags) */ #define SLJIT_ABS_F64 (SLJIT_FOP1_BASE + 8) #define SLJIT_ABS_F32 (SLJIT_ABS_F64 | SLJIT_32) SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop1(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 dst, sljit_sw dstw, sljit_s32 src, sljit_sw srcw); /* Starting index of opcodes for sljit_emit_fop2. */ #define SLJIT_FOP2_BASE 192 /* Flags: - (may destroy flags) */ #define SLJIT_ADD_F64 (SLJIT_FOP2_BASE + 0) #define SLJIT_ADD_F32 (SLJIT_ADD_F64 | SLJIT_32) /* Flags: - (may destroy flags) */ #define SLJIT_SUB_F64 (SLJIT_FOP2_BASE + 1) #define SLJIT_SUB_F32 (SLJIT_SUB_F64 | SLJIT_32) /* Flags: - (may destroy flags) */ #define SLJIT_MUL_F64 (SLJIT_FOP2_BASE + 2) #define SLJIT_MUL_F32 (SLJIT_MUL_F64 | SLJIT_32) /* Flags: - (may destroy flags) */ #define SLJIT_DIV_F64 (SLJIT_FOP2_BASE + 3) #define SLJIT_DIV_F32 (SLJIT_DIV_F64 | SLJIT_32) SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop2(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 dst, sljit_sw dstw, sljit_s32 src1, sljit_sw src1w, sljit_s32 src2, sljit_sw src2w); /* Label and jump instructions. */ SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler); /* Invert (negate) conditional type: xor (^) with 0x1 */ /* Integer comparison types. */ #define SLJIT_EQUAL 0 #define SLJIT_ZERO SLJIT_EQUAL #define SLJIT_NOT_EQUAL 1 #define SLJIT_NOT_ZERO SLJIT_NOT_EQUAL #define SLJIT_LESS 2 #define SLJIT_SET_LESS SLJIT_SET(SLJIT_LESS) #define SLJIT_GREATER_EQUAL 3 #define SLJIT_SET_GREATER_EQUAL SLJIT_SET(SLJIT_GREATER_EQUAL) #define SLJIT_GREATER 4 #define SLJIT_SET_GREATER SLJIT_SET(SLJIT_GREATER) #define SLJIT_LESS_EQUAL 5 #define SLJIT_SET_LESS_EQUAL SLJIT_SET(SLJIT_LESS_EQUAL) #define SLJIT_SIG_LESS 6 #define SLJIT_SET_SIG_LESS SLJIT_SET(SLJIT_SIG_LESS) #define SLJIT_SIG_GREATER_EQUAL 7 #define SLJIT_SET_SIG_GREATER_EQUAL SLJIT_SET(SLJIT_SIG_GREATER_EQUAL) #define SLJIT_SIG_GREATER 8 #define SLJIT_SET_SIG_GREATER SLJIT_SET(SLJIT_SIG_GREATER) #define SLJIT_SIG_LESS_EQUAL 9 #define SLJIT_SET_SIG_LESS_EQUAL SLJIT_SET(SLJIT_SIG_LESS_EQUAL) #define SLJIT_OVERFLOW 10 #define SLJIT_SET_OVERFLOW SLJIT_SET(SLJIT_OVERFLOW) #define SLJIT_NOT_OVERFLOW 11 /* Unlike other flags, sljit_emit_jump may destroy this flag. */ #define SLJIT_CARRY 12 #define SLJIT_SET_CARRY SLJIT_SET(SLJIT_CARRY) #define SLJIT_NOT_CARRY 13 /* Floating point comparison types. */ #define SLJIT_EQUAL_F64 14 #define SLJIT_EQUAL_F32 (SLJIT_EQUAL_F64 | SLJIT_32) #define SLJIT_SET_EQUAL_F SLJIT_SET(SLJIT_EQUAL_F64) #define SLJIT_NOT_EQUAL_F64 15 #define SLJIT_NOT_EQUAL_F32 (SLJIT_NOT_EQUAL_F64 | SLJIT_32) #define SLJIT_SET_NOT_EQUAL_F SLJIT_SET(SLJIT_NOT_EQUAL_F64) #define SLJIT_LESS_F64 16 #define SLJIT_LESS_F32 (SLJIT_LESS_F64 | SLJIT_32) #define SLJIT_SET_LESS_F SLJIT_SET(SLJIT_LESS_F64) #define SLJIT_GREATER_EQUAL_F64 17 #define SLJIT_GREATER_EQUAL_F32 (SLJIT_GREATER_EQUAL_F64 | SLJIT_32) #define SLJIT_SET_GREATER_EQUAL_F SLJIT_SET(SLJIT_GREATER_EQUAL_F64) #define SLJIT_GREATER_F64 18 #define SLJIT_GREATER_F32 (SLJIT_GREATER_F64 | SLJIT_32) #define SLJIT_SET_GREATER_F SLJIT_SET(SLJIT_GREATER_F64) #define SLJIT_LESS_EQUAL_F64 19 #define SLJIT_LESS_EQUAL_F32 (SLJIT_LESS_EQUAL_F64 | SLJIT_32) #define SLJIT_SET_LESS_EQUAL_F SLJIT_SET(SLJIT_LESS_EQUAL_F64) #define SLJIT_UNORDERED_F64 20 #define SLJIT_UNORDERED_F32 (SLJIT_UNORDERED_F64 | SLJIT_32) #define SLJIT_SET_UNORDERED_F SLJIT_SET(SLJIT_UNORDERED_F64) #define SLJIT_ORDERED_F64 21 #define SLJIT_ORDERED_F32 (SLJIT_ORDERED_F64 | SLJIT_32) #define SLJIT_SET_ORDERED_F SLJIT_SET(SLJIT_ORDERED_F64) /* Unconditional jump types. */ #define SLJIT_JUMP 22 /* Fast calling method. See sljit_emit_fast_enter / SLJIT_FAST_RETURN. */ #define SLJIT_FAST_CALL 23 /* Called function must be declared with the SLJIT_FUNC attribute. */ #define SLJIT_CALL 24 /* Called function must be declared with cdecl attribute. This is the default attribute for C functions. */ #define SLJIT_CALL_CDECL 25 /* The target can be changed during runtime (see: sljit_set_jump_addr). */ #define SLJIT_REWRITABLE_JUMP 0x1000 /* When this flag is passed, the execution of the current function ends and the called function returns to the caller of the current function. The stack usage is reduced before the call, but it is not necessarily reduced to zero. In the latter case the compiler needs to allocate space for some arguments and the return register must be kept as well. This feature is highly experimental and not supported on SPARC platform at the moment. */ #define SLJIT_CALL_RETURN 0x2000 /* Emit a jump instruction. The destination is not set, only the type of the jump. type must be between SLJIT_EQUAL and SLJIT_FAST_CALL type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP Flags: does not modify flags. */ SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, sljit_s32 type); /* Emit a C compiler (ABI) compatible function call. type must be SLJIT_CALL or SLJIT_CALL_CDECL type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP and SLJIT_CALL_RETURN arg_types is the combination of SLJIT_RET / SLJIT_ARGx (SLJIT_DEF_RET / SLJIT_DEF_ARGx) macros Flags: destroy all flags. */ SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 arg_types); /* Basic arithmetic comparison. In most architectures it is implemented as an compare operation followed by a sljit_emit_jump. However some architectures (i.e: ARM64 or MIPS) may employ special optimizations here. It is suggested to use this comparison form when appropriate. type must be between SLJIT_EQUAL and SLJIT_I_SIG_LESS_EQUAL type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP Flags: may destroy flags. */ SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_cmp(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 src1, sljit_sw src1w, sljit_s32 src2, sljit_sw src2w); /* Basic floating point comparison. In most architectures it is implemented as an SLJIT_FCMP operation (setting appropriate flags) 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 appropriate. type must be between SLJIT_EQUAL_F64 and SLJIT_ORDERED_F32 type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP Flags: destroy flags. Note: if either operand is NaN, the behaviour is undefined for types up to SLJIT_S_LESS_EQUAL. */ SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_fcmp(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 src1, sljit_sw src1w, sljit_s32 src2, sljit_sw src2w); /* Set the destination of the jump to this label. */ SLJIT_API_FUNC_ATTRIBUTE void sljit_set_label(struct sljit_jump *jump, struct sljit_label* label); /* Set the destination address of the jump to this label. */ SLJIT_API_FUNC_ATTRIBUTE void sljit_set_target(struct sljit_jump *jump, sljit_uw target); /* Emit an indirect jump or fast call. Direct form: set src to SLJIT_IMM() and srcw to the address Indirect form: any other valid addressing mode type must be between SLJIT_JUMP and SLJIT_FAST_CALL Flags: does not modify flags. */ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_ijump(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 src, sljit_sw srcw); /* Emit a C compiler (ABI) compatible function call. Direct form: set src to SLJIT_IMM() and srcw to the address Indirect form: any other valid addressing mode type must be SLJIT_CALL or SLJIT_CALL_CDECL type can be combined (or'ed) with SLJIT_CALL_RETURN arg_types is the combination of SLJIT_RET / SLJIT_ARGx (SLJIT_DEF_RET / SLJIT_DEF_ARGx) macros Flags: destroy all flags. */ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 arg_types, sljit_s32 src, sljit_sw srcw); /* Perform the operation using the conditional flags as the second argument. Type must always be between SLJIT_EQUAL and SLJIT_ORDERED_F64. The value represented by the type is 1, if the condition represented by the type is fulfilled, and 0 otherwise. If op == SLJIT_MOV, SLJIT_MOV32: Set dst to the value represented by the type (0 or 1). Flags: - (does not modify flags) If op == SLJIT_OR, op == SLJIT_AND, op == SLJIT_XOR Performs the binary operation using dst as the first, and the value represented by type as the second argument. Result is written into dst. Flags: Z (may destroy flags) */ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_flags(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 dst, sljit_sw dstw, sljit_s32 type); /* Emit a conditional mov instruction which moves source to destination, if the condition is satisfied. Unlike other arithmetic operations this instruction does not support memory access. type must be between SLJIT_EQUAL and SLJIT_ORDERED_F64 dst_reg must be a valid register and it can be combined with SLJIT_32 to perform a 32 bit arithmetic operation src must be register or immediate (SLJIT_IMM) Flags: - (does not modify flags) */ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_cmov(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 dst_reg, sljit_s32 src, sljit_sw srcw); /* The following flags are used by sljit_emit_mem() and sljit_emit_fmem(). */ /* When SLJIT_MEM_SUPP is passed, no instructions are emitted. Instead the function returns with SLJIT_SUCCESS if the instruction form is supported and SLJIT_ERR_UNSUPPORTED otherwise. This flag allows runtime checking of available instruction forms. */ #define SLJIT_MEM_SUPP 0x0200 /* Memory load operation. This is the default. */ #define SLJIT_MEM_LOAD 0x0000 /* Memory store operation. */ #define SLJIT_MEM_STORE 0x0400 /* Base register is updated before the memory access. */ #define SLJIT_MEM_PRE 0x0800 /* Base register is updated after the memory access. */ #define SLJIT_MEM_POST 0x1000 /* Emit a single memory load or store with update instruction. When the requested instruction form is not supported by the CPU, it returns with SLJIT_ERR_UNSUPPORTED instead of emulating the instruction. This allows specializing tight loops based on the supported instruction forms (see SLJIT_MEM_SUPP flag). type must be between SLJIT_MOV and SLJIT_MOV_P and can be combined with SLJIT_MEM_* flags. Either SLJIT_MEM_PRE or SLJIT_MEM_POST must be specified. reg is the source or destination register, and must be different from the base register of the mem operand mem must be a SLJIT_MEM1() or SLJIT_MEM2() operand Flags: - (does not modify flags) */ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_mem(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 reg, sljit_s32 mem, sljit_sw memw); /* Same as sljit_emit_mem except the followings: type must be SLJIT_MOV_F64 or SLJIT_MOV_F32 and can be combined with SLJIT_MEM_* flags. Either SLJIT_MEM_PRE or SLJIT_MEM_POST must be specified. freg is the source or destination floating point register */ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fmem(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 freg, sljit_s32 mem, sljit_sw memw); /* Copies the base address of SLJIT_SP + offset to dst. The offset can be anything to negate the effect of relative addressing. For example if an array of sljit_sw values is stored on the stack from offset 0x40, and R0 contains the offset of an array item plus 0x120, this item can be overwritten by two SLJIT instructions: sljit_get_local_base(compiler, SLJIT_R1, 0, 0x40 - 0x120); sljit_emit_op1(compiler, SLJIT_MOV, SLJIT_MEM2(SLJIT_R1, SLJIT_R0), 0, SLJIT_IMM, 0x5); Flags: - (may destroy flags) */ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_local_base(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw, sljit_sw offset); /* Store a value that can be changed runtime (see: sljit_get_const_addr / sljit_set_const) Flags: - (does not modify flags) */ SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw, sljit_sw init_value); /* Store the value of a label (see: sljit_set_put_label) Flags: - (does not modify flags) */ SLJIT_API_FUNC_ATTRIBUTE struct sljit_put_label* sljit_emit_put_label(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw); /* Set the value stored by put_label to this label. */ SLJIT_API_FUNC_ATTRIBUTE void sljit_set_put_label(struct sljit_put_label *put_label, struct sljit_label *label); /* After the code generation the address for label, jump and const instructions are computed. Since these structures are freed by 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 and executable offset are required to perform dynamic code modifications. See sljit_get_executable_offset function. */ SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset); SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant, sljit_sw executable_offset); /* --------------------------------------------------------------------- */ /* Miscellaneous utility functions */ /* --------------------------------------------------------------------- */ #define SLJIT_MAJOR_VERSION 0 #define SLJIT_MINOR_VERSION 94 /* Get the human readable name of the platform. Can be useful on platforms like ARM, where ARM and Thumb2 functions can be mixed, and it is useful to know the type of the code generator. */ SLJIT_API_FUNC_ATTRIBUTE const char* sljit_get_platform_name(void); /* Portable helper function to get an offset of a member. */ #define SLJIT_OFFSETOF(base, member) ((sljit_sw)(&((base*)0x10)->member) - 0x10) #if (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) /* The sljit_stack structure and its manipulation functions provides an implementation for a top-down stack. The stack top is stored in the end field of the sljit_stack structure and the stack goes down to the min_start field, so the memory region reserved for this stack is between min_start (inclusive) and end (exclusive) fields. However the application can only use the region between start (inclusive) and end (exclusive) fields. The sljit_stack_resize function can be used to extend this region up to min_start. This feature uses the "address space reserve" feature of modern operating systems. Instead of allocating a large memory block applications can allocate a small memory region and extend it later without moving the content of the memory area. Therefore after a successful resize by sljit_stack_resize all pointers into this region are still valid. Note: this structure may not be supported by all operating systems. end and max_limit fields are aligned to PAGE_SIZE bytes (usually 4 Kbyte or more). stack should grow in larger steps, e.g. 4Kbyte, 16Kbyte or more. */ struct sljit_stack { /* User data, anything can be stored here. Initialized to the same value as the end field. */ sljit_u8 *top; /* These members are read only. */ /* End address of the stack */ sljit_u8 *end; /* Current start address of the stack. */ sljit_u8 *start; /* Lowest start address of the stack. */ sljit_u8 *min_start; }; /* Allocates a new stack. Returns NULL if unsuccessful. Note: see sljit_create_compiler for the explanation of allocator_data. */ SLJIT_API_FUNC_ATTRIBUTE struct sljit_stack* SLJIT_FUNC sljit_allocate_stack(sljit_uw start_size, sljit_uw max_size, void *allocator_data); SLJIT_API_FUNC_ATTRIBUTE void SLJIT_FUNC sljit_free_stack(struct sljit_stack *stack, void *allocator_data); /* Can be used to increase (extend) or decrease (shrink) the stack memory area. Returns with new_start if successful and NULL otherwise. It always fails if new_start is less than min_start or greater or equal than end fields. The fields of the stack are not changed if the returned value is NULL (the current memory content is never lost). */ SLJIT_API_FUNC_ATTRIBUTE sljit_u8 *SLJIT_FUNC sljit_stack_resize(struct sljit_stack *stack, sljit_u8 *new_start); #endif /* (defined SLJIT_UTIL_STACK && SLJIT_UTIL_STACK) */ #if !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) /* Get the entry address of a given function (signed, unsigned result). */ #define SLJIT_FUNC_ADDR(func_name) ((sljit_sw)func_name) #define SLJIT_FUNC_UADDR(func_name) ((sljit_uw)func_name) #else /* !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) */ /* All JIT related code should be placed in the same context (library, binary, etc.). */ /* Get the entry address of a given function (signed, unsigned result). */ #define SLJIT_FUNC_ADDR(func_name) (*(sljit_sw*)(void*)func_name) #define SLJIT_FUNC_UADDR(func_name) (*(sljit_uw*)(void*)func_name) /* For powerpc64, the function pointers point to a context descriptor. */ struct sljit_function_context { sljit_uw addr; sljit_uw r2; sljit_uw 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. */ SLJIT_API_FUNC_ATTRIBUTE void sljit_set_function_context(void** func_ptr, struct sljit_function_context* context, sljit_uw addr, void* func); #endif /* !(defined SLJIT_INDIRECT_CALL && SLJIT_INDIRECT_CALL) */ #if (defined SLJIT_EXECUTABLE_ALLOCATOR && SLJIT_EXECUTABLE_ALLOCATOR) /* Free unused executable memory. The allocator keeps some free memory around to reduce the number of OS executable memory allocations. This improves performance since these calls are costly. However it is sometimes desired to free all unused memory regions, e.g. before the application terminates. */ SLJIT_API_FUNC_ATTRIBUTE void sljit_free_unused_memory_exec(void); #endif /* --------------------------------------------------------------------- */ /* CPU specific functions */ /* --------------------------------------------------------------------- */ /* The following function is a helper function for sljit_emit_op_custom. It returns with the real machine register index ( >=0 ) of any SLJIT_R, SLJIT_S and SLJIT_SP registers. Note: it returns with -1 for virtual registers (only on x86-32). */ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_register_index(sljit_s32 reg); /* The following function is a helper function for sljit_emit_op_custom. It returns with the real machine register index of any SLJIT_FLOAT register. Note: the index is always an even number on ARM (except ARM-64), MIPS, and SPARC. */ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_float_register_index(sljit_s32 reg); /* Any instruction can be inserted into the instruction stream by sljit_emit_op_custom. It has a similar purpose as inline assembly. The size parameter must match to the instruction size of the target architecture: x86: 0 < size <= 15. The instruction argument can be byte aligned. Thumb2: if size == 2, the instruction argument must be 2 byte aligned. if size == 4, the instruction argument must be 4 byte aligned. Otherwise: size must be 4 and instruction argument must be 4 byte aligned. */ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_custom(struct sljit_compiler *compiler, void *instruction, sljit_u32 size); /* Flags were set by a 32 bit operation. */ #define SLJIT_CURRENT_FLAGS_32 SLJIT_32 /* Flags were set by an ADD or ADDC operations. */ #define SLJIT_CURRENT_FLAGS_ADD 0x01 /* Flags were set by a SUB, SUBC, or NEG operation. */ #define SLJIT_CURRENT_FLAGS_SUB 0x02 /* Flags were set by sljit_emit_op2u with SLJIT_SUB opcode. Must be combined with SLJIT_CURRENT_FLAGS_SUB. */ #define SLJIT_CURRENT_FLAGS_COMPARE 0x04 /* Define the currently available CPU status flags. It is usually used after an sljit_emit_label or sljit_emit_op_custom operations to define which CPU status flags are available. The current_flags must be a valid combination of SLJIT_SET_* and SLJIT_CURRENT_FLAGS_* constants. */ SLJIT_API_FUNC_ATTRIBUTE void sljit_set_current_flags(struct sljit_compiler *compiler, sljit_s32 current_flags); #ifdef __cplusplus } /* extern "C" */ #endif #endif /* SLJIT_LIR_H_ */