/*****************************************************************************\

Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.

This file is licensed under the Snes9x License.

For further information, consult the LICENSE file in the root directory.

\*****************************************************************************/

#ifndef _65C816_H_

#define _65C816_H_

#define Carry 1

#define Zero 2

#define IRQ 4

#define Decimal 8

#define IndexFlag 16

#define MemoryFlag 32

#define Overflow 64

#define Negative 128

#define Emulation 256

#define SetCarry() (ICPU._Carry = 1)

#define ClearCarry() (ICPU._Carry = 0)

#define SetZero() (ICPU._Zero = 0)

#define ClearZero() (ICPU._Zero = 1)

#define SetIRQ() (Registers.PL |= IRQ)

#define ClearIRQ() (Registers.PL &= ~IRQ)

#define SetDecimal() (Registers.PL |= Decimal)

#define ClearDecimal() (Registers.PL &= ~Decimal)

#define SetIndex() (Registers.PL |= IndexFlag)

#define ClearIndex() (Registers.PL &= ~IndexFlag)

#define SetMemory() (Registers.PL |= MemoryFlag)

#define ClearMemory() (Registers.PL &= ~MemoryFlag)

#define SetOverflow() (ICPU._Overflow = 1)

#define ClearOverflow() (ICPU._Overflow = 0)

#define SetNegative() (ICPU._Negative = 0x80)

#define ClearNegative() (ICPU._Negative = 0)

#define CheckCarry() (ICPU._Carry)

#define CheckZero() (ICPU._Zero == 0)

#define CheckIRQ() (Registers.PL & IRQ)

#define CheckDecimal() (Registers.PL & Decimal)

#define CheckIndex() (Registers.PL & IndexFlag)

#define CheckMemory() (Registers.PL & MemoryFlag)

#define CheckOverflow() (ICPU._Overflow)

#define CheckNegative() (ICPU._Negative & 0x80)

#define CheckEmulation() (Registers.P.W & Emulation)

#define SetFlags(f) (Registers.P.W |= (f))

#define ClearFlags(f) (Registers.P.W &= ~(f))

#define CheckFlag(f) (Registers.PL & (f))

typedef union

{

#ifdef LSB_FIRST

struct { uint8 l, h; } B;

#else

struct { uint8 h, l; } B;

#endif

uint16 W;

} pair;

typedef union

{

#ifdef LSB_FIRST

struct { uint8 xPCl, xPCh, xPB, z; } B;

struct { uint16 xPC, d; } W;

#else

struct { uint8 z, xPB, xPCh, xPCl; } B;

struct { uint16 d, xPC; } W;

#endif

uint32 xPBPC;

} PC_t;

struct SRegisters

};

#define AL A.B.l

#define AH A.B.h

#define XL X.B.l

#define XH X.B.h

#define YL Y.B.l

#define YH Y.B.h

#define SL S.B.l

#define SH S.B.h

#define DL D.B.l

#define DH D.B.h

#define PL P.B.l

#define PH P.B.h

#define PBPC PC.xPBPC

#define PCw PC.W.xPC

#define PCh PC.B.xPCh

#define PCl PC.B.xPCl

#define PB PC.B.xPB

extern struct SRegisters Registers;

#endif