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cc65/src/cc65/opcodes.h

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/*****************************************************************************/
/* */
/* opcodes.h */
/* */
/* Opcode and addressing mode definitions */
/* */
/* */
/* */
/* (C) 2001-2004 Ullrich von Bassewitz */
/* Roemerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#ifndef OPCODES_H
#define OPCODES_H
/* common */
#include "inline.h"
/*****************************************************************************/
/* Data */
/*****************************************************************************/
/* 65XX opcodes */
typedef enum {
OP65_ADC,
OP65_AND,
OP65_ASL,
OP65_BCC,
OP65_BCS,
OP65_BEQ,
OP65_BIT,
OP65_BMI,
OP65_BNE,
OP65_BPL,
OP65_BRA,
OP65_BRK,
OP65_BVC,
OP65_BVS,
OP65_CLC,
OP65_CLD,
OP65_CLI,
OP65_CLV,
OP65_CMP,
OP65_CPX,
OP65_CPY,
OP65_DEA,
OP65_DEC,
OP65_DEX,
OP65_DEY,
OP65_EOR,
OP65_INA,
OP65_INC,
OP65_INX,
OP65_INY,
OP65_JCC,
OP65_JCS,
OP65_JEQ,
OP65_JMI,
OP65_JMP,
OP65_JNE,
OP65_JPL,
OP65_JSR,
OP65_JVC,
OP65_JVS,
OP65_LDA,
OP65_LDX,
OP65_LDY,
OP65_LSR,
OP65_NOP,
OP65_ORA,
OP65_PHA,
OP65_PHP,
OP65_PHX,
OP65_PHY,
OP65_PLA,
OP65_PLP,
OP65_PLX,
OP65_PLY,
OP65_ROL,
OP65_ROR,
OP65_RTI,
OP65_RTS,
OP65_SBC,
OP65_SEC,
OP65_SED,
OP65_SEI,
OP65_STA,
OP65_STP, /* 65c02, 65816 stop */
OP65_STX,
OP65_STY,
OP65_STZ,
OP65_TAX,
OP65_TAY,
OP65_TRB,
OP65_TSB,
OP65_TSX,
OP65_TXA,
OP65_TXS,
OP65_TYA,
/* Number of opcodes available */
OP65_COUNT,
/* Invalid opcode */
OP65_INVALID = OP65_COUNT,
} opc_t;
/* 65XX addressing modes */
typedef enum {
AM65_IMP, /* implicit */
AM65_ACC, /* accumulator */
AM65_IMM, /* immediate */
AM65_ZP, /* zeropage */
AM65_ZPX, /* zeropage,X */
AM65_ZPY, /* zeropage,Y */
AM65_ABS, /* absolute */
AM65_ABSX, /* absolute,X */
AM65_ABSY, /* absolute,Y */
AM65_ZPX_IND, /* (zeropage,x) */
AM65_ZP_INDY, /* (zeropage),y */
AM65_ZP_IND, /* (zeropage) */
AM65_BRA /* branch */
} am_t;
/* Branch conditions */
typedef enum {
BC_CC,
BC_CS,
BC_EQ,
BC_MI,
BC_NE,
BC_PL,
BC_VC,
BC_VS
} bc_t;
/* Opcode info */
#define OF_NONE 0x0000U /* No additional information */
#define OF_UBRA 0x0001U /* Unconditional branch */
#define OF_CBRA 0x0002U /* Conditional branch */
#define OF_ZBRA 0x0004U /* Branch on zero flag condition */
#define OF_FBRA 0x0008U /* Branch on cond set by a load */
#define OF_LBRA 0x0010U /* Jump/branch is long */
#define OF_RET 0x0020U /* Return from function */
#define OF_LOAD 0x0040U /* Register load */
#define OF_STORE 0x0080U /* Register store */
#define OF_XFR 0x0100U /* Transfer instruction */
#define OF_CALL 0x0200U /* A subroutine call */
#define OF_REG_INCDEC 0x0400U /* A register increment or decrement */
#define OF_SETF 0x0800U /* Insn will set both Z and N flags according to the result */
#define OF_CMP 0x1000U /* A compare A/X/Y instruction */
#define OF_NOIMP 0x2000U /* Implicit addressing mode is actually A */
#define OF_READ 0x4000U /* Read from the memory address */
#define OF_WRITE 0x8000U /* Write to the memory address */
/* Combined infos */
#define OF_BRA (OF_UBRA | OF_CBRA) /* Operation is a jump/branch */
#define OF_DEAD (OF_UBRA | OF_RET) /* Dead end - no exec behind this point */
#define OF_RMW (OF_READ | OF_WRITE) /* Read, Modify and Write */
/* Opcode description */
typedef struct {
opc_t OPC; /* Opcode */
char Mnemo[9]; /* Mnemonic */
unsigned char Size; /* Size, 0 = check addressing mode */
unsigned short Info; /* Additional information */
unsigned int Use; /* Registers used by this insn */
unsigned int Chg; /* Registers changed by this insn */
} OPCDesc;
/* Opcode description table */
extern const OPCDesc OPCTable[OP65_COUNT];
/*****************************************************************************/
/* Code */
/*****************************************************************************/
const OPCDesc* FindOP65 (const char* OPC);
/* Find the given opcode and return the opcode description. If the opcode was
** not found, NULL is returned.
*/
unsigned GetInsnSize (opc_t OPC, am_t AM);
/* Return the size of the given instruction */
#if defined(HAVE_INLINE)
INLINE const OPCDesc* GetOPCDesc (opc_t OPC)
/* Get an opcode description */
{
/* Return the description */
return &OPCTable [OPC];
}
#else
# define GetOPCDesc(OPC) (&OPCTable [(OPC)])
#endif
#if defined(HAVE_INLINE)
INLINE unsigned GetOPCInfo (opc_t OPC)
/* Get opcode information */
{
/* Return the info */
return OPCTable[OPC].Info;
}
#else
# define GetOPCInfo(OPC) (OPCTable[(OPC)].Info)
#endif
unsigned char GetAMUseInfo (am_t AM);
/* Get usage info for the given addressing mode (addressing modes that use
** index registers return REG_r info for these registers).
*/
opc_t GetInverseBranch (opc_t OPC);
/* Return a branch that reverse the condition of the branch given in OPC */
opc_t MakeShortBranch (opc_t OPC);
/* Return the short version of the given branch. If the branch is already
** a short branch, return the opcode unchanged.
*/
opc_t MakeLongBranch (opc_t OPC);
/* Return the long version of the given branch. If the branch is already
** a long branch, return the opcode unchanged.
*/
bc_t GetBranchCond (opc_t OPC);
/* Get the condition for the conditional branch in OPC */
bc_t GetInverseCond (bc_t BC);
/* Return the inverse condition of the given one */
/* End of opcodes.h */
#endif
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