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410 lines
16 KiB
C
410 lines
16 KiB
C
#ifndef YJIT_ASM_H
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#define YJIT_ASM_H 1
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#include <stdint.h>
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#include <stddef.h>
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#include <stdbool.h>
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// Size of code pages to allocate
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#define CODE_PAGE_SIZE 16 * 1024
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// How many code pages to allocate at once
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#define PAGES_PER_ALLOC 512
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// Maximum number of labels to link
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#define MAX_LABELS 32
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// Maximum number of label references
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#define MAX_LABEL_REFS 32
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// Reference to an ASM label
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typedef struct LabelRef
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{
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// Position in the code block where the label reference exists
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uint32_t pos;
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// Label which this refers to
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uint32_t label_idx;
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} labelref_t;
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// Block of executable memory into which instructions can be written
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typedef struct CodeBlock
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{
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// Memory block
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uint8_t* mem_block;
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// Memory block size
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uint32_t mem_size;
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/// Current writing position
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uint32_t write_pos;
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// Table of registered label addresses
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uint32_t label_addrs[MAX_LABELS];
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// Table of registered label names
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// Note that these should be constant strings only
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const char* label_names[MAX_LABELS];
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// References to labels
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labelref_t label_refs[MAX_LABEL_REFS];
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// Number of labels registeered
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uint32_t num_labels;
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// Number of references to labels
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uint32_t num_refs;
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// TODO: system for disassembly/comment strings, indexed by position
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// Flag to enable or disable comments
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bool has_asm;
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} codeblock_t;
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enum OpndType
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{
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OPND_NONE,
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OPND_REG,
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OPND_IMM,
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OPND_MEM
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};
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enum RegType
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{
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REG_GP,
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REG_FP,
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REG_XMM,
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REG_IP
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};
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typedef struct X86Reg
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{
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// Register type
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uint8_t reg_type;
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// Register index number
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uint8_t reg_no;
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} x86reg_t;
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typedef struct X86Mem
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{
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/// Base register number
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uint8_t base_reg_no;
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/// Index register number
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uint8_t idx_reg_no;
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/// SIB scale exponent value (power of two, two bits)
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uint8_t scale_exp;
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/// Has index register flag
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bool has_idx;
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// TODO: should this be here, or should we have an extra operand type?
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/// IP-relative addressing flag
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bool is_iprel;
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/// Constant displacement from the base, not scaled
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int32_t disp;
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} x86mem_t;
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typedef struct X86Opnd
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{
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// Operand type
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uint8_t type;
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// Size in bits
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uint16_t num_bits;
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union
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{
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// Register operand
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x86reg_t reg;
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// Memory operand
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x86mem_t mem;
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// Signed immediate value
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int64_t imm;
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// Unsigned immediate value
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uint64_t unsig_imm;
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} as;
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} x86opnd_t;
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// Struct representing a code page
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typedef struct code_page_struct
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{
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// Chunk of executable memory
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uint8_t* mem_block;
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// Size of the executable memory chunk
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uint32_t page_size;
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// Next node in the free list (private)
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struct code_page_struct* _next;
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} code_page_t;
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// Dummy none/null operand
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static const x86opnd_t NO_OPND = { OPND_NONE, 0, .as.imm = 0 };
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// Instruction pointer
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static const x86opnd_t RIP = { OPND_REG, 64, .as.reg = { REG_IP, 5 }};
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// 64-bit GP registers
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static const x86opnd_t RAX = { OPND_REG, 64, .as.reg = { REG_GP, 0 }};
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static const x86opnd_t RCX = { OPND_REG, 64, .as.reg = { REG_GP, 1 }};
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static const x86opnd_t RDX = { OPND_REG, 64, .as.reg = { REG_GP, 2 }};
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static const x86opnd_t RBX = { OPND_REG, 64, .as.reg = { REG_GP, 3 }};
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static const x86opnd_t RSP = { OPND_REG, 64, .as.reg = { REG_GP, 4 }};
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static const x86opnd_t RBP = { OPND_REG, 64, .as.reg = { REG_GP, 5 }};
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static const x86opnd_t RSI = { OPND_REG, 64, .as.reg = { REG_GP, 6 }};
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static const x86opnd_t RDI = { OPND_REG, 64, .as.reg = { REG_GP, 7 }};
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static const x86opnd_t R8 = { OPND_REG, 64, .as.reg = { REG_GP, 8 }};
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static const x86opnd_t R9 = { OPND_REG, 64, .as.reg = { REG_GP, 9 }};
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static const x86opnd_t R10 = { OPND_REG, 64, .as.reg = { REG_GP, 10 }};
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static const x86opnd_t R11 = { OPND_REG, 64, .as.reg = { REG_GP, 11 }};
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static const x86opnd_t R12 = { OPND_REG, 64, .as.reg = { REG_GP, 12 }};
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static const x86opnd_t R13 = { OPND_REG, 64, .as.reg = { REG_GP, 13 }};
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static const x86opnd_t R14 = { OPND_REG, 64, .as.reg = { REG_GP, 14 }};
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static const x86opnd_t R15 = { OPND_REG, 64, .as.reg = { REG_GP, 15 }};
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// 32-bit GP registers
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static const x86opnd_t EAX = { OPND_REG, 32, .as.reg = { REG_GP, 0 }};
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static const x86opnd_t ECX = { OPND_REG, 32, .as.reg = { REG_GP, 1 }};
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static const x86opnd_t EDX = { OPND_REG, 32, .as.reg = { REG_GP, 2 }};
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static const x86opnd_t EBX = { OPND_REG, 32, .as.reg = { REG_GP, 3 }};
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static const x86opnd_t ESP = { OPND_REG, 32, .as.reg = { REG_GP, 4 }};
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static const x86opnd_t EBP = { OPND_REG, 32, .as.reg = { REG_GP, 5 }};
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static const x86opnd_t ESI = { OPND_REG, 32, .as.reg = { REG_GP, 6 }};
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static const x86opnd_t EDI = { OPND_REG, 32, .as.reg = { REG_GP, 7 }};
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static const x86opnd_t R8D = { OPND_REG, 32, .as.reg = { REG_GP, 8 }};
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static const x86opnd_t R9D = { OPND_REG, 32, .as.reg = { REG_GP, 9 }};
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static const x86opnd_t R10D = { OPND_REG, 32, .as.reg = { REG_GP, 10 }};
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static const x86opnd_t R11D = { OPND_REG, 32, .as.reg = { REG_GP, 11 }};
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static const x86opnd_t R12D = { OPND_REG, 32, .as.reg = { REG_GP, 12 }};
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static const x86opnd_t R13D = { OPND_REG, 32, .as.reg = { REG_GP, 13 }};
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static const x86opnd_t R14D = { OPND_REG, 32, .as.reg = { REG_GP, 14 }};
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static const x86opnd_t R15D = { OPND_REG, 32, .as.reg = { REG_GP, 15 }};
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// 16-bit GP registers
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static const x86opnd_t AX = { OPND_REG, 16, .as.reg = { REG_GP, 0 }};
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static const x86opnd_t CX = { OPND_REG, 16, .as.reg = { REG_GP, 1 }};
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static const x86opnd_t DX = { OPND_REG, 16, .as.reg = { REG_GP, 2 }};
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static const x86opnd_t BX = { OPND_REG, 16, .as.reg = { REG_GP, 3 }};
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static const x86opnd_t SP = { OPND_REG, 16, .as.reg = { REG_GP, 4 }};
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static const x86opnd_t BP = { OPND_REG, 16, .as.reg = { REG_GP, 5 }};
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static const x86opnd_t SI = { OPND_REG, 16, .as.reg = { REG_GP, 6 }};
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static const x86opnd_t DI = { OPND_REG, 16, .as.reg = { REG_GP, 7 }};
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static const x86opnd_t R8W = { OPND_REG, 16, .as.reg = { REG_GP, 8 }};
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static const x86opnd_t R9W = { OPND_REG, 16, .as.reg = { REG_GP, 9 }};
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static const x86opnd_t R10W = { OPND_REG, 16, .as.reg = { REG_GP, 10 }};
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static const x86opnd_t R11W = { OPND_REG, 16, .as.reg = { REG_GP, 11 }};
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static const x86opnd_t R12W = { OPND_REG, 16, .as.reg = { REG_GP, 12 }};
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static const x86opnd_t R13W = { OPND_REG, 16, .as.reg = { REG_GP, 13 }};
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static const x86opnd_t R14W = { OPND_REG, 16, .as.reg = { REG_GP, 14 }};
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static const x86opnd_t R15W = { OPND_REG, 16, .as.reg = { REG_GP, 15 }};
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// 8-bit GP registers
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static const x86opnd_t AL = { OPND_REG, 8, .as.reg = { REG_GP, 0 }};
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static const x86opnd_t CL = { OPND_REG, 8, .as.reg = { REG_GP, 1 }};
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static const x86opnd_t DL = { OPND_REG, 8, .as.reg = { REG_GP, 2 }};
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static const x86opnd_t BL = { OPND_REG, 8, .as.reg = { REG_GP, 3 }};
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static const x86opnd_t SPL = { OPND_REG, 8, .as.reg = { REG_GP, 4 }};
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static const x86opnd_t BPL = { OPND_REG, 8, .as.reg = { REG_GP, 5 }};
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static const x86opnd_t SIL = { OPND_REG, 8, .as.reg = { REG_GP, 6 }};
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static const x86opnd_t DIL = { OPND_REG, 8, .as.reg = { REG_GP, 7 }};
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static const x86opnd_t R8B = { OPND_REG, 8, .as.reg = { REG_GP, 8 }};
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static const x86opnd_t R9B = { OPND_REG, 8, .as.reg = { REG_GP, 9 }};
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static const x86opnd_t R10B = { OPND_REG, 8, .as.reg = { REG_GP, 10 }};
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static const x86opnd_t R11B = { OPND_REG, 8, .as.reg = { REG_GP, 11 }};
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static const x86opnd_t R12B = { OPND_REG, 8, .as.reg = { REG_GP, 12 }};
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static const x86opnd_t R13B = { OPND_REG, 8, .as.reg = { REG_GP, 13 }};
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static const x86opnd_t R14B = { OPND_REG, 8, .as.reg = { REG_GP, 14 }};
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static const x86opnd_t R15B = { OPND_REG, 8, .as.reg = { REG_GP, 15 }};
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// C argument registers
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#define NUM_C_ARG_REGS 6
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#define C_ARG_REGS ( (x86opnd_t[]){ RDI, RSI, RDX, RCX, R8, R9 } )
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// Memory operand with base register and displacement/offset
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x86opnd_t mem_opnd(uint32_t num_bits, x86opnd_t base_reg, int32_t disp);
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// Scale-index-base memory operand
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x86opnd_t mem_opnd_sib(uint32_t num_bits, x86opnd_t base_reg, x86opnd_t index_reg, int32_t scale, int32_t disp);
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// Immediate number operand
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x86opnd_t imm_opnd(int64_t val);
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// Constant pointer operand
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x86opnd_t const_ptr_opnd(const void *ptr);
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// Struct member operand
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#define member_opnd(base_reg, struct_type, member_name) mem_opnd( \
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8 * sizeof(((struct_type*)0)->member_name), \
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base_reg, \
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offsetof(struct_type, member_name) \
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)
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// Struct member operand with an array index
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#define member_opnd_idx(base_reg, struct_type, member_name, idx) mem_opnd( \
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8 * sizeof(((struct_type*)0)->member_name[0]), \
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base_reg, \
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(offsetof(struct_type, member_name) + \
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sizeof(((struct_type*)0)->member_name[0]) * idx) \
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)
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// Machine code allocation
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uint8_t* alloc_exec_mem(uint32_t mem_size);
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code_page_t* alloc_code_page(void);
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void free_code_page(code_page_t* code_page);
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// Code block methods
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void cb_init(codeblock_t* cb, uint8_t* mem_block, uint32_t mem_size);
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void cb_align_pos(codeblock_t* cb, uint32_t multiple);
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void cb_set_pos(codeblock_t* cb, uint32_t pos);
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void cb_set_write_ptr(codeblock_t* cb, uint8_t* code_ptr);
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uint8_t* cb_get_ptr(codeblock_t* cb, uint32_t index);
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uint8_t* cb_get_write_ptr(codeblock_t* cb);
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void cb_write_byte(codeblock_t* cb, uint8_t byte);
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void cb_write_bytes(codeblock_t* cb, uint32_t num_bytes, ...);
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void cb_write_int(codeblock_t* cb, uint64_t val, uint32_t num_bits);
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uint32_t cb_new_label(codeblock_t* cb, const char* name);
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void cb_write_label(codeblock_t* cb, uint32_t label_idx);
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void cb_label_ref(codeblock_t* cb, uint32_t label_idx);
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void cb_link_labels(codeblock_t* cb);
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// Encode individual instructions into a code block
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void add(codeblock_t* cb, x86opnd_t opnd0, x86opnd_t opnd1);
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void and(codeblock_t* cb, x86opnd_t opnd0, x86opnd_t opnd1);
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void call_ptr(codeblock_t* cb, x86opnd_t scratch_reg, uint8_t* dst_ptr);
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void call_label(codeblock_t* cb, uint32_t label_idx);
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void call(codeblock_t* cb, x86opnd_t opnd);
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void cmova(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovae(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovb(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovbe(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovc(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmove(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovg(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovge(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovl(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovle(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovna(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovnae(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovnb(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovnbe(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovnc(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovne(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovng(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovnge(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovnl(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovnle(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovno(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovnp(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovns(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovnz(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovo(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovp(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovpe(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovpo(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovs(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmovz(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void cmp(codeblock_t* cb, x86opnd_t opnd0, x86opnd_t opnd1);
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void cdq(codeblock_t* cb);
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void cqo(codeblock_t* cb);
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void int3(codeblock_t* cb);
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void ja_label(codeblock_t* cb, uint32_t label_idx);
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void jae_label(codeblock_t* cb, uint32_t label_idx);
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void jb_label(codeblock_t* cb, uint32_t label_idx);
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void jbe_label(codeblock_t* cb, uint32_t label_idx);
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void jc_label(codeblock_t* cb, uint32_t label_idx);
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void je_label(codeblock_t* cb, uint32_t label_idx);
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void jg_label(codeblock_t* cb, uint32_t label_idx);
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void jge_label(codeblock_t* cb, uint32_t label_idx);
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void jl_label(codeblock_t* cb, uint32_t label_idx);
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void jle_label(codeblock_t* cb, uint32_t label_idx);
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void jna_label(codeblock_t* cb, uint32_t label_idx);
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void jnae_label(codeblock_t* cb, uint32_t label_idx);
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void jnb_label(codeblock_t* cb, uint32_t label_idx);
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void jnbe_label(codeblock_t* cb, uint32_t label_idx);
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void jnc_label(codeblock_t* cb, uint32_t label_idx);
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void jne_label(codeblock_t* cb, uint32_t label_idx);
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void jng_label(codeblock_t* cb, uint32_t label_idx);
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void jnge_label(codeblock_t* cb, uint32_t label_idx);
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void jnl_label(codeblock_t* cb, uint32_t label_idx);
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void jnle_label(codeblock_t* cb, uint32_t label_idx);
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void jno_label(codeblock_t* cb, uint32_t label_idx);
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void jnp_label(codeblock_t* cb, uint32_t label_idx);
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void jns_label(codeblock_t* cb, uint32_t label_idx);
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void jnz_label(codeblock_t* cb, uint32_t label_idx);
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void jo_label(codeblock_t* cb, uint32_t label_idx);
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void jp_label(codeblock_t* cb, uint32_t label_idx);
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void jpe_label(codeblock_t* cb, uint32_t label_idx);
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void jpo_label(codeblock_t* cb, uint32_t label_idx);
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void js_label(codeblock_t* cb, uint32_t label_idx);
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void jz_label(codeblock_t* cb, uint32_t label_idx);
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void ja_ptr(codeblock_t* cb, uint8_t* ptr);
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void jae_ptr(codeblock_t* cb, uint8_t* ptr);
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void jb_ptr(codeblock_t* cb, uint8_t* ptr);
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void jbe_ptr(codeblock_t* cb, uint8_t* ptr);
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void jc_ptr(codeblock_t* cb, uint8_t* ptr);
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void je_ptr(codeblock_t* cb, uint8_t* ptr);
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void jg_ptr(codeblock_t* cb, uint8_t* ptr);
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void jge_ptr(codeblock_t* cb, uint8_t* ptr);
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void jl_ptr(codeblock_t* cb, uint8_t* ptr);
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void jle_ptr(codeblock_t* cb, uint8_t* ptr);
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void jna_ptr(codeblock_t* cb, uint8_t* ptr);
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void jnae_ptr(codeblock_t* cb, uint8_t* ptr);
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void jnb_ptr(codeblock_t* cb, uint8_t* ptr);
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void jnbe_ptr(codeblock_t* cb, uint8_t* ptr);
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void jnc_ptr(codeblock_t* cb, uint8_t* ptr);
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void jne_ptr(codeblock_t* cb, uint8_t* ptr);
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void jng_ptr(codeblock_t* cb, uint8_t* ptr);
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void jnge_ptr(codeblock_t* cb, uint8_t* ptr);
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void jnl_ptr(codeblock_t* cb, uint8_t* ptr);
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void jnle_ptr(codeblock_t* cb, uint8_t* ptr);
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void jno_ptr(codeblock_t* cb, uint8_t* ptr);
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void jnp_ptr(codeblock_t* cb, uint8_t* ptr);
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void jns_ptr(codeblock_t* cb, uint8_t* ptr);
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void jnz_ptr(codeblock_t* cb, uint8_t* ptr);
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void jo_ptr(codeblock_t* cb, uint8_t* ptr);
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void jp_ptr(codeblock_t* cb, uint8_t* ptr);
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void jpe_ptr(codeblock_t* cb, uint8_t* ptr);
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void jpo_ptr(codeblock_t* cb, uint8_t* ptr);
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void js_ptr(codeblock_t* cb, uint8_t* ptr);
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void jz_ptr(codeblock_t* cb, uint8_t* ptr);
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void jmp_label(codeblock_t* cb, uint32_t label_idx);
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void jmp_ptr(codeblock_t* cb, uint8_t* ptr);
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void jmp_rm(codeblock_t* cb, x86opnd_t opnd);
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void jmp32(codeblock_t* cb, int32_t offset);
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void lea(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void mov(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void movsx(codeblock_t* cb, x86opnd_t dst, x86opnd_t src);
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void neg(codeblock_t* cb, x86opnd_t opnd);
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void nop(codeblock_t* cb, uint32_t length);
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void not(codeblock_t* cb, x86opnd_t opnd);
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void or(codeblock_t* cb, x86opnd_t opnd0, x86opnd_t opnd1);
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void pop(codeblock_t* cb, x86opnd_t reg);
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void popfq(codeblock_t* cb);
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void push(codeblock_t* cb, x86opnd_t opnd);
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void pushfq(codeblock_t* cb);
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void ret(codeblock_t* cb);
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void sal(codeblock_t* cb, x86opnd_t opnd0, x86opnd_t opnd1);
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void sar(codeblock_t* cb, x86opnd_t opnd0, x86opnd_t opnd1);
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void shl(codeblock_t* cb, x86opnd_t opnd0, x86opnd_t opnd1);
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void shr(codeblock_t* cb, x86opnd_t opnd0, x86opnd_t opnd1);
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void sub(codeblock_t* cb, x86opnd_t opnd0, x86opnd_t opnd1);
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void test(codeblock_t* cb, x86opnd_t rm_opnd, x86opnd_t test_opnd);
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void ud2(codeblock_t* cb);
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void xchg(codeblock_t* cb, x86opnd_t rm_opnd, x86opnd_t r_opnd);
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void xor(codeblock_t* cb, x86opnd_t opnd0, x86opnd_t opnd1);
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void cb_write_lock_prefix(codeblock_t* cb);
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#endif
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