ref: 176a57a1e96c53513b82b093b105bb9b4f92da6c
dir: /include/asm/localasm.h/
/*
* This file is part of RGBDS.
*
* Copyright (c) 1997-2018, Carsten Sorensen and RGBDS contributors.
*
* SPDX-License-Identifier: MIT
*/
#ifndef RGBDS_ASM_LOCALASM_H
#define RGBDS_ASM_LOCALASM_H
/*
* GB Z80 instruction groups
*
* n3 = 3-bit
* n = 8-bit
* nn = 16-bit
*
* ADC A,n : 0xCE
* ADC A,r : 0x88|r
* ADD A,n : 0xC6
* ADD A,r : 0x80|r
* ADD HL,ss : 0x09|(ss<<4)
* ADD SP,n : 0xE8
* AND A,n : 0xE6
* AND A,r : 0xA0|r
* BIT n3,r : 0xCB 0x40|(n3<<3)|r
* CALL cc,nn : 0xC4|(cc<<3)
* CALL nn : 0xCD
* CCF : 0x3F
* CP A,n : 0xFE
* CP A,r : 0xB8|r
* CPL : 0x2F
* DAA : 0x27
* DEC r : 0x05|(r<<3)
* DEC ss : 0x0B|(ss<<4)
* DI : 0xF3
* EI : 0xFB
* HALT : 0x76
* INC r : 0x04|(r<<3)
* INC ss : 0x03|(ss<<4)
* JP HL : 0xE9
* JP cc,nn : 0xC2|(cc<<3)
* JP nn : 0xC3|(cc<<3)
* JR n : 0x18
* JR cc,n : 0x20|(cc<<3)
* LD (nn),SP : 0x08
* LD ($FF00+C),A : 0xE2
* LD ($FF00+n),A : 0xE0
* LD (nn),A : 0xEA
* LD (rr),A : 0x02|(rr<<4) // HL+ and HL- included
* LD A,($FF00+C) : 0xF2
* LD A,($FF00+n) : 0xF0
* LD A,(nn) : 0xFA
* LD A,(rr) : 0x0A|(rr<<4) // HL+ and HL- included
* LD HL,SP+n : 0xF8
* LD SP,HL : 0xF9
* LD r,n : 0x06|(r<<3)
* LD r,r' : 0x40|(r<<3)|r' // NOTE: LD (HL),(HL) not allowed
* LD ss,nn : 0x01|(ss<<4)
* NOP : 0x00
* OR A,n : 0xF6
* OR A,r : 0xB0|r
* POP tt : 0xC1|(tt<<4)
* PUSH tt : 0xC5|(tt<<4)
* RES n3,r : 0xCB 0x80|(n3<<3)|r
* RET : 0xC9
* RET cc : 0xC0|(cc<<3)
* RETI : 0xD9
* RL r : 0xCB 0x10|r
* RLA : 0x17
* RLC r : 0xCB 0x00|r
* RLCA : 0x07
* RR r : 0xCB 0x18|r
* RRA : 0x1F
* RRC r : 0xCB 0x08|r
* RRCA : 0x0F
* RST n : 0xC7|n
* SBC A,n : 0xDE
* SBC A,r : 0x98|r
* SCF : 0x37
* SET n3,r : 0xCB 0xC0|(n8<<3)|r
* SLA r : 0xCB 0x20|r
* SRA r : 0xCB 0x28|r
* SRL r : 0xCB 0x38|r
* STOP : 0x10 0x00
* SUB A,n : 0xD6
* SUB A,r : 0x90|r
* SWAP r : 0xCB 0x30|r
* XOR A,n : 0xEE
* XOR A,r : 0xA8|r
*/
/* "r" defs */
enum {
REG_B = 0,
REG_C,
REG_D,
REG_E,
REG_H,
REG_L,
REG_HL_IND,
REG_A
};
/* "rr" defs */
enum {
REG_BC_IND = 0,
REG_DE_IND,
REG_HL_INDINC,
REG_HL_INDDEC,
};
/* "ss" defs (SP) and "tt" defs (AF) */
enum {
REG_BC = 0,
REG_DE = 1,
REG_HL = 2,
REG_SP = 3,
REG_AF = 3
};
/* "cc" defs */
enum {
CC_NZ = 0,
CC_Z,
CC_NC,
CC_C
};
#endif /* RGBDS_ASM_LOCALASM_H */