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/*
* 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, as long as the compiling
context is the same. See sljit_emit_enter for more details.
- Supports self modifying code: target of any jump and call
instructions and some constant values can be dynamically modified
during runtime. See SLJIT_REWRITABLE_JUMP.
- although it is not suggested to do it frequently
- can be used for inline caching: save an important value once
in the instruction stream
- 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:
- The compiler is more like a platform independent assembler, so
there is no built-in variable management. Registers and stack must
be managed manually (the name of the compiler refers to this).
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
/* Version numbers. */
#define SLJIT_MAJOR_VERSION 0
#define SLJIT_MINOR_VERSION 95
/* --------------------------------------------------------------------- */
/* 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 further code generation.
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 sljit_generate_code() returns with this error 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
/* --------------------------------------------------------------------- */
/* Registers */
/* --------------------------------------------------------------------- */
/*
Scratch (R) registers: registers which may not preserve their values
across function calls.
Saved (S) registers: registers which preserve their values across
function calls.
The scratch and saved register sets 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 real address of a value. */
#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)
/* Return with floating point arg. */
#define SLJIT_RETURN_FREG SLJIT_FR0
/* --------------------------------------------------------------------- */
/* 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;
/* Architecture dependent flags. */
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;
/* Available scratch registers. */
sljit_s32 scratches;
/* Available saved registers. */
sljit_s32 saveds;
/* Available float scratch registers. */
sljit_s32 fscratches;
/* Available float saved registers. */
sljit_s32 fsaveds;
/* Local stack size. */
sljit_s32 local_size;
/* Maximum 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;
#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_RISCV && SLJIT_CONFIG_RISCV)
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 an API function is called.
Used internally for calling API functions. */
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 occurres, future 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 after 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 it is enough to check the compiler status
after the code is compiled. */
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
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 instruction stream. This is the final step
of the code generation so no more instructions can be emitted 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. The return value is one, if a
feature is fully supported, and it is two, if partially supported.
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 when a feature is emulated, specialized code paths may 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] Count trailing zero is supported. */
#define SLJIT_HAS_CTZ 4
/* [Emulated] Rotate left/right is supported. */
#define SLJIT_HAS_ROT 5
/* [Emulated] Conditional move is supported. */
#define SLJIT_HAS_CMOV 6
/* [Emulated] Prefetch instruction is available (emulated as a nop). */
#define SLJIT_HAS_PREFETCH 7
#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);
/* If type is between SLJIT_ORDERED_EQUAL and SLJIT_ORDERED_LESS_EQUAL,
sljit_cmp_info returns one, if the cpu supports the passed floating
point comparison type.
If type is SLJIT_UNORDERED or SLJIT_ORDERED, sljit_cmp_info returns
one, if the cpu supports checking the unordered comparison result
regardless of the comparison type passed to the comparison instruction.
The returned value is always one, if there is at least one type between
SLJIT_ORDERED_EQUAL and SLJIT_ORDERED_LESS_EQUAL where sljit_cmp_info
returns with a zero value.
Otherwise it returns zero. */
SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_cmp_info(sljit_s32 type);
/* The following functions generate machine code. If there is no
error, they return with SLJIT_SUCCESS, otherwise they return
with an error code. */
/*
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. This is often
called as function prologue. 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 specified by the SLJIT_ARGSx
(SLJIT_ARGS0 .. SLJIT_ARGS4) macros. Currently maximum four
arguments are supported. See the description of SLJIT_ARGSx
macros about argument passing. Furthermore the register set
used by the function must be declared as well. The number of
scratch and saved registers available to 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 two, 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 data. The "local_size"
argument contains the size in bytes of this local area, and
it can be accessed using SLJIT_MEM1(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 to zero.
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.
*/
/* Saved registers between SLJIT_S0 and SLJIT_S(n - 1) (inclusive)
are not saved / restored on function enter / return. Instead,
these registers can be used to pass / return data (such as
global / local context pointers) across function calls. The
value of n must be between 1 and 3. This option is only
supported by SLJIT_ENTER_REG_ARG calling convention. */
#define SLJIT_ENTER_KEEP(n) (n)
/* The compiled function uses an SLJIT specific register argument
calling convention. This is a lightweight function call type where
both the caller and the called functions must be compiled by
SLJIT. The type argument of the call must be SLJIT_CALL_REG_ARG
and all arguments must be stored in scratch registers. */
#define SLJIT_ENTER_REG_ARG 0x00000004
/* 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 SLJIT compiler has a current context (which contains the local
stack space size, number of used registers, etc.) which is initialized
by sljit_emit_enter. Several functions (such as sljit_emit_return)
requires this context to be able to generate the appropriate code.
However, some code fragments (compiled separately) may have no
normal entry point so their context is unknown for the compiler.
The sljit_set_context and sljit_emit_enter have the same arguments,
but sljit_set_context does not generate any machine code.
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 to the caller function. The sljit_emit_return_void function
does not return with any value. The sljit_emit_return function returns
with a single value loaded from its source operand. The load operation
can be between SLJIT_MOV and SLJIT_MOV_P (see sljit_emit_op1) and
SLJIT_MOV_F32/SLJIT_MOV_F64 (see sljit_emit_fop1) depending on the
return value specified by sljit_emit_enter/sljit_set_context. */
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);
/* Restores the saved registers and free the stack area, then the execution
continues from the address specified by the source operand. This
operation is similar to sljit_emit_return, but it ignores the return
address. The code where the exection continues should use the same context
as the caller function (see sljit_set_context). A word (pointer) value
can be passed in the SLJIT_RETURN_REG register. This function can be used
to jump to exception handlers. */
SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return_to(struct sljit_compiler *compiler,
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 the local area which can be
efficiently exploited by various optimizations. Registers can be saved
and restored manually 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 available registers (immediate argument must be 0)
[imm] - absolute memory address
[reg+imm] - indirect memory address
[reg+(reg<<imm)] - indirect indexed memory address (shift must be between 0 and 3)
useful for accessing arrays (fully supported by both x86 and
ARM architectures, and cheap operation on others)
*/
/*
IMPORTANT NOTE: memory accesses 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
Write-back is not supported
riscv: [reg+imm], -2048 <= imm <= 2047
Write-back is not 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
#define SLJIT_REG_PAIR(r1, r2) ((r1) | ((r2) << 8))
/* 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 bits 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 which source register can hold
any 32 or 64 bit value, and it is converted to a 32 bit compatible format
first. When the source and destination registers are the same, 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 flag bits which can be set according
to the result of an operation. Other CPUs (MIPS) do not have status
flag bits, 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 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.
Note: the logical or operation can be used to set flags.
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.
Certain instructions (e.g. SLJIT_MOV) does not modify flags, so
status flags are unchanged.
Example:
sljit_op2(..., SLJIT_ADD | SLJIT_SET_Z, ...)
sljit_op1(..., SLJIT_MOV, ...)
Zero flag is set according to the result of SLJIT_ADD.
sljit_op2(..., SLJIT_ADD | SLJIT_SET_Z, ...)
sljit_op2(..., SLJIT_ADD, ...)
Zero flag has unknown value.
These flags can be used for code optimization. E.g. a fast loop can be
implemented by decreasing a counter register and set the zero flag
using a single instruction. The zero register can be used by a
conditional jump to restart the loop. A single comparison can set a
zero and less flags to check if a value is less, equal, or greater
than another value.
Motivation: although some CPUs can set a large number of flag bits,
usually their values are ignored or only a few of them are used. Emulating
a large number of flags on systems without a flag register is complicated
so SLJIT instructions must specify the flag they want to use and only
that flag is computed. 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 (e.g. SLJIT_SET_LESS, SLJIT_SET_F_EQUAL). */
#define SLJIT_SET(condition) ((condition) << 10)
/* 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 instructions are emitted for other architectures. */
#define SLJIT_ENDBR (SLJIT_OP0_BASE + 8)
/* Flags: - (may destroy flags)
Skip stack frames before return when Intel Control-flow
Enforcement Technology (CET) is enabled. No instructions
are emitted for other architectures. */
#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: loads a pointer sized data, useful on x32 mode (a 64 bit mode
on x86-64 which uses 32 bit pointers) 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)
/* Count trailing zeroes
Flags: - (may destroy flags)
Note: immediate source argument is not supported */
#define SLJIT_CTZ (SLJIT_OP1_BASE + 11)
#define SLJIT_CTZ32 (SLJIT_CTZ | 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 | OVERFLOW | 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
Same as SLJIT_SHL, except the the second operand is
always masked by the length of the shift operation. */
#define SLJIT_MSHL (SLJIT_OP2_BASE + 9)
#define SLJIT_MSHL32 (SLJIT_MSHL | 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 + 10)
#define SLJIT_LSHR32 (SLJIT_LSHR | SLJIT_32)
/* Flags: Z
Same as SLJIT_LSHR, except the the second operand is
always masked by the length of the shift operation. */
#define SLJIT_MLSHR (SLJIT_OP2_BASE + 11)
#define SLJIT_MLSHR32 (SLJIT_MLSHR | 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 + 12)
#define SLJIT_ASHR32 (SLJIT_ASHR | SLJIT_32)
/* Flags: Z
Same as SLJIT_ASHR, except the the second operand is
always masked by the length of the shift operation. */
#define SLJIT_MASHR (SLJIT_OP2_BASE + 13)
#define SLJIT_MASHR32 (SLJIT_MASHR | SLJIT_32)
/* Flags: - (may destroy flags)
Let bit_length be the length of the rotate operation: 32 or 64.
The second operand is always masked by (bit_length - 1). */
#define SLJIT_ROTL (SLJIT_OP2_BASE + 14)
#define SLJIT_ROTL32 (SLJIT_ROTL | SLJIT_32)
/* Flags: - (may destroy flags)
Let bit_length be the length of the rotate operation: 32 or 64.
The second operand is always masked by (bit_length - 1). */
#define SLJIT_ROTR (SLJIT_OP2_BASE + 15)
#define SLJIT_ROTR32 (SLJIT_ROTR | 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);
/* Emit a left or right shift operation, where the bits shifted
in comes from a separate source operand. All operands are
interpreted as unsigned integers.
In the followings the value_mask variable is 31 for 32 bit
operations and word_size - 1 otherwise.
op must be one of the following operations:
SLJIT_SHL or SLJIT_SHL32:
src_dst <<= src2
src_dst |= ((src1 >> 1) >> (src2 ^ value_mask))
SLJIT_MSHL or SLJIT_MSHL32:
src2 &= value_mask
perform the SLJIT_SHL or SLJIT_SHL32 operation
SLJIT_LSHR or SLJIT_LSHR32:
src_dst >>= src2
src_dst |= ((src1 << 1) << (src2 ^ value_mask))
SLJIT_MLSHR or SLJIT_MLSHR32:
src2 &= value_mask
perform the SLJIT_LSHR or SLJIT_LSHR32 operation
op can be combined (or'ed) with SLJIT_SHIFT_INTO_NON_ZERO
src_dst must be a register which content is updated after
the operation is completed
src1 / src1w contains the bits which shifted into src_dst
src2 / src2w contains the shift amount
Note: a rotate operation can be performed if src_dst and
src1 are set to the same register
Flags: - (may destroy flags) */
/* The src2 contains a non-zero value. Improves the generated
code on certain architectures, which provides a small
performance improvement. */
#define SLJIT_SHIFT_INTO_NON_ZERO 0x200
SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_shift_into(struct sljit_compiler *compiler, sljit_s32 op,
sljit_s32 src_dst,
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: F64, F32, S32, SW
Rounding mode when the destination is SW or S32: 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_CMP_F32/64.
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 the carry flag. */
#define SLJIT_CARRY 12
#define SLJIT_SET_CARRY SLJIT_SET(SLJIT_CARRY)
#define SLJIT_NOT_CARRY 13
/* Basic floating point comparison types.
Note: when the comparison result is unordered, their behaviour is unspecified. */
#define SLJIT_F_EQUAL 14
#define SLJIT_SET_F_EQUAL SLJIT_SET(SLJIT_F_EQUAL)
#define SLJIT_F_NOT_EQUAL 15
#define SLJIT_SET_F_NOT_EQUAL SLJIT_SET(SLJIT_F_NOT_EQUAL)
#define SLJIT_F_LESS 16
#define SLJIT_SET_F_LESS SLJIT_SET(SLJIT_F_LESS)
#define SLJIT_F_GREATER_EQUAL 17
#define SLJIT_SET_F_GREATER_EQUAL SLJIT_SET(SLJIT_F_GREATER_EQUAL)
#define SLJIT_F_GREATER 18
#define SLJIT_SET_F_GREATER SLJIT_SET(SLJIT_F_GREATER)
#define SLJIT_F_LESS_EQUAL 19
#define SLJIT_SET_F_LESS_EQUAL SLJIT_SET(SLJIT_F_LESS_EQUAL)
/* Jumps when either argument contains a NaN value. */
#define SLJIT_UNORDERED 20
#define SLJIT_SET_UNORDERED SLJIT_SET(SLJIT_UNORDERED)
/* Jumps when neither argument contains a NaN value. */
#define SLJIT_ORDERED 21
#define SLJIT_SET_ORDERED SLJIT_SET(SLJIT_ORDERED)
/* Ordered / unordered floating point comparison types.
Note: each comparison type has an ordered and unordered form. Some
architectures supports only either of them (see: sljit_cmp_info). */
#define SLJIT_ORDERED_EQUAL 22
#define SLJIT_SET_ORDERED_EQUAL SLJIT_SET(SLJIT_ORDERED_EQUAL)
#define SLJIT_UNORDERED_OR_NOT_EQUAL 23
#define SLJIT_SET_UNORDERED_OR_NOT_EQUAL SLJIT_SET(SLJIT_UNORDERED_OR_NOT_EQUAL)
#define SLJIT_ORDERED_LESS 24
#define SLJIT_SET_ORDERED_LESS SLJIT_SET(SLJIT_ORDERED_LESS)
#define SLJIT_UNORDERED_OR_GREATER_EQUAL 25
#define SLJIT_SET_UNORDERED_OR_GREATER_EQUAL SLJIT_SET(SLJIT_UNORDERED_OR_GREATER_EQUAL)
#define SLJIT_ORDERED_GREATER 26
#define SLJIT_SET_ORDERED_GREATER SLJIT_SET(SLJIT_ORDERED_GREATER)
#define SLJIT_UNORDERED_OR_LESS_EQUAL 27
#define SLJIT_SET_UNORDERED_OR_LESS_EQUAL SLJIT_SET(SLJIT_UNORDERED_OR_LESS_EQUAL)
#define SLJIT_UNORDERED_OR_EQUAL 28
#define SLJIT_SET_UNORDERED_OR_EQUAL SLJIT_SET(SLJIT_UNORDERED_OR_EQUAL)
#define SLJIT_ORDERED_NOT_EQUAL 29
#define SLJIT_SET_ORDERED_NOT_EQUAL SLJIT_SET(SLJIT_ORDERED_NOT_EQUAL)
#define SLJIT_UNORDERED_OR_LESS 30
#define SLJIT_SET_UNORDERED_OR_LESS SLJIT_SET(SLJIT_UNORDERED_OR_LESS)
#define SLJIT_ORDERED_GREATER_EQUAL 31
#define SLJIT_SET_ORDERED_GREATER_EQUAL SLJIT_SET(SLJIT_ORDERED_GREATER_EQUAL)
#define SLJIT_UNORDERED_OR_GREATER 32
#define SLJIT_SET_UNORDERED_OR_GREATER SLJIT_SET(SLJIT_UNORDERED_OR_GREATER)
#define SLJIT_ORDERED_LESS_EQUAL 33
#define SLJIT_SET_ORDERED_LESS_EQUAL SLJIT_SET(SLJIT_ORDERED_LESS_EQUAL)
/* Unconditional jump types. */
#define SLJIT_JUMP 34
/* Fast calling method. See sljit_emit_fast_enter / SLJIT_FAST_RETURN. */
#define SLJIT_FAST_CALL 35
/* Default C calling convention. */
#define SLJIT_CALL 36
/* Called function must be compiled by SLJIT.
See SLJIT_ENTER_REG_ARG option. */
#define SLJIT_CALL_REG_ARG 37
/* 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 address must be stored on the stack as well. */
#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_REG_ARG
type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP and/or SLJIT_CALL_RETURN
arg_types can be specified by SLJIT_ARGSx (SLJIT_ARG_RETURN / SLJIT_ARG_VALUE) 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
a 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_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
a SLJIT_CMP_F32/64 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_F_EQUAL and SLJIT_ORDERED_LESS_EQUAL
type can be combined (or'ed) with SLJIT_REWRITABLE_JUMP
Flags: destroy flags.
Note: when an operand is NaN the behaviour depends on the comparison type. */
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_REG_ARG
type can be combined (or'ed) with SLJIT_CALL_RETURN
arg_types can be specified by SLJIT_ARGSx (SLJIT_ARG_RETURN / SLJIT_ARG_VALUE) 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 an operation using the conditional flags as the second argument.
Type must always be between SLJIT_EQUAL and SLJIT_ORDERED_LESS_EQUAL.
The value represented by the type is 1, if the condition represented
by the type is fulfilled, and 0 otherwise.
When op is SLJIT_MOV or SLJIT_MOV32:
Set dst to the value represented by the type (0 or 1).
Flags: - (does not modify flags)
When op is SLJIT_AND, SLJIT_AND32, SLJIT_OR, SLJIT_OR32, SLJIT_XOR, or SLJIT_XOR32
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_LESS_EQUAL
type can be combined (or'ed) with SLJIT_32
dst_reg must be a valid register
src must be a valid 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(), sljit_emit_mem_update(),
sljit_emit_fmem(), and sljit_emit_fmem_update(). */
/* Memory load operation. This is the default. */
#define SLJIT_MEM_LOAD 0x000000
/* Memory store operation. */
#define SLJIT_MEM_STORE 0x000200
/* The following flags are used by sljit_emit_mem() and sljit_emit_fmem(). */
/* Load or stora data from an unaligned (byte aligned) address. */
#define SLJIT_MEM_UNALIGNED 0x000400
/* Load or stora data from a 16 bit aligned address. */
#define SLJIT_MEM_UNALIGNED_16 0x000800
/* Load or stora data from a 32 bit aligned address. */
#define SLJIT_MEM_UNALIGNED_32 0x001000
/* The following flags are used by sljit_emit_mem_update(),
and sljit_emit_fmem_update(). */
/* Base register is updated before the memory access (default). */
#define SLJIT_MEM_PRE 0x000000
/* Base register is updated after the memory access. */
#define SLJIT_MEM_POST 0x000400
/* 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 0x000800
/* The sljit_emit_mem emits instructions for various memory operations:
When SLJIT_MEM_UNALIGNED / SLJIT_MEM_UNALIGNED_16 /
SLJIT_MEM_UNALIGNED_32 is set in type argument:
Emit instructions for unaligned memory loads or stores. When
SLJIT_UNALIGNED is not defined, the only way to access unaligned
memory data is using sljit_emit_mem. Otherwise all operations (e.g.
sljit_emit_op1/2, or sljit_emit_fop1/2) supports unaligned access.
In general, the performance of unaligned memory accesses are often
lower than aligned and should be avoided.
When a pair of registers is passed in reg argument:
Emit instructions for moving data between a register pair and
memory. The register pair can be specified by the SLJIT_REG_PAIR
macro. The first register is loaded from or stored into the
location specified by the mem/memw arguments, and the end address
of this operation is the starting address of the data transfer
between the second register and memory. The type argument must
be SLJIT_MOV. The SLJIT_MEM_UNALIGNED* options are allowed for
this operation.
type must be between SLJIT_MOV and SLJIT_MOV_P and can be
combined (or'ed) with SLJIT_MEM_* flags
reg is a register or register pair, which is the source or
destination of the operation
mem must be a memory 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);
/* 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).
Absolute address (SLJIT_MEM0) forms are never supported
and the base (first) register specified by the mem argument
must not be SLJIT_SP and must also be different from the
register specified by the reg argument.
type must be between SLJIT_MOV and SLJIT_MOV_P and can be
combined (or'ed) with SLJIT_MEM_* flags
reg is the source or destination register of the operation
mem must be a memory operand
Flags: - (does not modify flags) */
SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_mem_update(struct sljit_compiler *compiler, sljit_s32 type,
sljit_s32 reg,
sljit_s32 mem, sljit_sw memw);
/* Same as sljit_emit_mem except the followings:
Loading or storing a pair of registers is not supported.
type must be SLJIT_MOV_F64 or SLJIT_MOV_F32 and can be
combined (or'ed) with SLJIT_MEM_* flags.
freg is the source or destination floating point register
of the operation
mem must be a memory operand
Flags: - (does not modify flags) */
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);
/* Same as sljit_emit_mem_update except the followings:
type must be SLJIT_MOV_F64 or SLJIT_MOV_F32 and can be
combined (or'ed) with SLJIT_MEM_* flags
freg is the source or destination floating point register
of the operation
mem must be a memory operand
Flags: - (does not modify flags) */
SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fmem_update(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
represent the starting address of a value in the local data (stack).
The offset is not limited by the local data limits, it can be any value.
For example if an array of bytes are stored on the stack from
offset 0x40, and R0 contains the offset of an array item plus 0x120,
this item can be changed by two SLJIT instructions:
sljit_get_local_base(compiler, SLJIT_R1, 0, 0x40 - 0x120);
sljit_emit_op1(compiler, SLJIT_MOV_U8, 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);
/* --------------------------------------------------------------------- */
/* 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 ( >= 0 ) index of any SLJIT_FR,
and SLJIT_FS register.
Note: the index is always an even number on ARM-32, MIPS. */
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);
/* --------------------------------------------------------------------- */
/* Miscellaneous utility functions */
/* --------------------------------------------------------------------- */
/* 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
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* SLJIT_LIR_H_ */