65oo2/lib/op.h

#ifndef OP_H
# define OP_H 1

# include <stdint.h>

# define OP_MAX 256

# define IS_PREFIX(x) (x & 0x3)

# define OP_ADDR_IMPL 1 << 0
# define OP_ADDR_REL  1 << 1
# define OP_ADDR_IMM  1 << 2
# define OP_ADDR_IND  1 << 3
# define OP_ADDR_ABS  1 << 4
# define OP_ADDR_X    1 << 5
# define OP_ADDR_Y    1 << 6
# define OP_ADDR_A    1 << 7

# define OP_BRK_impl  0x00
# define OP_ORA_x_ind 0x01
# define OP_PHP_impl  0x08
# define OP_ORA_imm   0x09
# define OP_ORA_abs   0x0D
# define OP_ASL_abs   0x0E

# define OP_BPL_rel   0x10
# define OP_ORA_ind_y 0x11
# define OP_CLC_impl  0x18
# define OP_ORA_abs_y 0x19
# define OP_ORA_abs_x 0x1D
# define OP_ASL_abs_x 0x1E

# define OP_JSR_abs   0x20
# define OP_AND_x_ind 0x21
# define OP_PLP_impl  0x28
# define OP_AND_imm   0x29
# define OP_ROL_a     0x2A
# define OP_BIT_abs   0x2C
# define OP_AND_abs   0x2D
# define OP_ROL_abs   0x2E

# define OP_BMI_rel   0x30
# define OP_AND_ind_y 0x31

# define OP_JMP_abs   0x4C
# define OP_JMP_ind   0x6C

/*
 * size encoding
 */
# define SIZE_BYTE           0x0
# define SIZE_WORD           0x1
# define SIZE_LONG           0x2

# define TARGET_ZEXT         (1 << 2)
# define TARGET_SIZE_BYTE    SIZE_BYTE
# define TARGET_SIZE_WORD    SIZE_WORD
# define TARGET_SIZE_LONG    SIZE_LONG

# define ADDRESS_SIZE_BYTE   (SIZE_BYTE << 3)
# define ADDRESS_SIZE_WORD   (SIZE_WORD << 3)
# define ADDRESS_SIZE_LONG   (SIZE_LONG << 3)

# define GET_TARGET_SIZE(x)  ((x) & 0x03)
# define GET_ADDRESS_SIZE(x) (((x) >> 3) & 0x03)
# define IS_TARGET_ZEXT(x)   ((x) & TARGET_ZEXT)


extern const uint8_t opcode_addr[];
extern const char *opcode_str[];

#endif /* !OP_H */