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#ifndef UJIT_CORE_H
#define UJIT_CORE_H 1
#include "stddef.h"
#include "ujit_asm.h"
// Register uJIT receives the CFP and EC into
#define REG_CFP RDI
#define REG_EC RSI
// Register uJIT loads the SP into
#define REG_SP RDX
// Scratch registers used by uJIT
#define REG0 RAX
#define REG1 RCX
#define REG0_32 EAX
#define REG1_32 ECX
// Maximum number of versions per block
#define MAX_VERSIONS 5
// Tuple of (iseq, idx) used to idenfity basic blocks
typedef struct BlockId
{
// Instruction sequence
const rb_iseq_t *iseq;
// Instruction index
const unsigned int idx;
} blockid_t;
// Code generation context
typedef struct ctx_struct
{
// TODO: we may want to remove information that is not
// strictly necessary for versioning from this struct
// Some of the information here is only needed during
// code generation, eg: current pc
// Instruction sequence this is associated with
const rb_iseq_t *iseq;
// Index in the iseq of the opcode we are replacing
size_t start_idx;
// The start of the generated code
uint8_t *code_ptr;
// Current PC
VALUE *pc;
// Number of values pushed on the temporary stack
int32_t stack_size;
// Whether we know self is a heap object
bool self_is_object;
} ctx_t;
// Context object methods
int ctx_get_opcode(ctx_t *ctx);
VALUE ctx_get_arg(ctx_t* ctx, size_t arg_idx);
x86opnd_t ctx_sp_opnd(ctx_t* ctx, int32_t offset_bytes);
x86opnd_t ctx_stack_push(ctx_t* ctx, size_t n);
x86opnd_t ctx_stack_pop(ctx_t* ctx, size_t n);
x86opnd_t ctx_stack_opnd(ctx_t* ctx, int32_t idx);
void ujit_init_core(void);
#endif // #ifndef UJIT_CORE_H
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