asmstruc.h

著名SFC模拟器Snes9x的源代码。

/*
 * Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
 *
 * (c) Copyright 1996 - 2001 Gary Henderson ([e-mail]) and
 *                           Jerremy Koot ([e-mail])
 *
 * Super FX C emulator code 
 * (c) Copyright 1997 - 1999 Ivar ([e-mail]) and
 *                           Gary Henderson.
 * Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_.
 *
 * DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson.
 * C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_.
 * C4 C code (c) Copyright 2001 Gary Henderson ([e-mail]).
 *
 * DOS port code contains the works of other authors. See headers in
 * individual files.
 *
 * Snes9x homepage: www.snes9x.com
 *
 * Permission to use, copy, modify and distribute Snes9x in both binary and
 * source form, for non-commercial purposes, is hereby granted without fee,
 * providing that this license information and copyright notice appear with
 * all copies and any derived work.
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event shall the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Snes9x is freeware for PERSONAL USE only. Commercial users should
 * seek permission of the copyright holders first. Commercial use includes
 * charging money for Snes9x or software derived from Snes9x.
 *
 * The copyright holders request that bug fixes and improvements to the code
 * should be forwarded to them so everyone can benefit from the modifications
 * in future versions.
 *
 * Super NES and Super Nintendo Entertainment System are trademarks of
 * Nintendo Co., Limited and its subsidiary companies.
 */
#if defined(__DJGCC) || defined(MICROSOFT_C) || defined(_WINDOWS)
#define S9xTraceMessage _S9xTraceMessage
#define S9xGetPPU _S9xGetPPU
#define S9xSetPPU _S9xSetPPU
#define S9xSetDSP _S9xSetDSP
#define S9xGetDSP _S9xGetDSP
#define S9xGetCPU _S9xGetCPU
#define S9xSetCPU _S9xSetCPU
#define S9xGetC4 _S9xGetC4
#define S9xSetC4 _S9xSetC4
#define S9xSyncSpeed _S9xSyncSpeed
#define S9xTrace _S9xTrace
#define S9xDoHBlankProcessing _S9xDoHBlankProcessing
#define S9xTraceAPU _S9xTraceAPU
#define S9xGetWord _S9xGetWord
#define memset _memset
#define S9xDoHDMA _S9xDoHDMA
#define S9xStartHDMA _S9xStartHDMA
#define S9xEndScreenRefresh _S9xEndScreenRefresh
#define S9xStartScreenRefresh _S9xStartScreenRefresh
#define S9xSetAPUControl _S9xSetAPUControl
#define S9xSetAPUDSP _S9xSetAPUDSP
#define S9xGetAPUDSP _S9xGetAPUDSP
#define S9xTextMode _S9xTextMode
#define printf _printf
#define S9xSetAPUTimer _S9xSetAPUTimer
#define S9xAPUOPrint _S9xAPUOPrint
#define S9xSuperFXExec _S9xSuperFXExec
#define S9xGenerateSound _S9xGenerateSound
#define S9xUpdateJoypads _S9xUpdateJoypads
#define S9xMainLoop _S9xMainLoop
#define S9xDeinterleaveMode2 _S9xDeinterleaveMode2
#define RenderLine _RenderLine
#define S9xSetIRQ _S9xSetIRQ
#define S9xClearIRQ _S9xClearIRQ
#define SA1 _SA1
#define CPU _CPU
#define ICPU _ICPU
#define Settings _Settings
#define PPU _PPU
#define IPPU _IPPU
#define Registers _Registers
#define Memory _Memory
#define APU _APU
#define IAPU _IAPU
#define APURegisters _APURegisters
#define S9xBreakpoint _S9xBreakpoint
#define missing _missing
#define S9xApuOpcodes _S9xApuOpcodes
#define S9xAPUCycles _S9xAPUCycles
#define S9xMessage _S9xMessage
#define String _String
#define sprintf _sprintf
#define S9xSA1ExecuteDuringSleep _S9xSA1ExecuteDuringSleep

#define A1 _A1
#define A2 _A2
#define A3 _A3
#define A4 _A4
#define Work8 _Work8
#define Work16 _Work16
#define Work32 _Work32
#define Int8 _Int8
#define Int16 _Int16
#define Int32 _Int32
#define S9xE1M1X1 _S9xE1M1X1
#define S9xE0M1X1 _S9xE0M1X1
#define S9xE0M1X0 _S9xE0M1X0
#define S9xE0M0X1 _S9xE0M0X1
#define S9xE0M0X0 _S9xE0M0X0
#define S9xOpcodesM1X1 _S9xOpcodesM1X1
#define S9xOpcodesM1X0 _S9xOpcodesM1X0
#define S9xOpcodesM0X1 _S9xOpcodesM0X1
#define S9xOpcodesM0X0 _S9xOpcodesM0X0
#define APUROM _APUROM
#define W1 _W1
#define W2 _W2
#define W3 _W3
#define W4 _W4
#define ebx_save _ebx_save
#endif

#include "offsets.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 DEBUG_MODE_FLAG	    (1 << 0)
#define TRACE_FLAG	    (1 << 1)
#define SINGLE_STEP_FLAG    (1 << 2)
#define BREAK_FLAG	    (1 << 3)
#define SCAN_KEYS_FLAG	    (1 << 4)
#define SAVE_SNAPSHOT_FLAG  (1 << 5)
#define DELAYED_NMI_FLAG    (1 << 6)
#define NMI_FLAG	    (1 << 7)
#define PROCESS_SOUND_FLAG  (1 << 8)
#define FRAME_ADVANCE_FLAG  (1 << 9)
#define DELAYED_NMI_FLAG2   (1 << 10)
#define IRQ_PENDING_FLAG    (1 << 11)

#define MEMMAP_BLOCK_SIZE (0x1000)
#define MEMMAP_NUM_BLOCKS (0x1000000 / MEMMAP_BLOCK_SIZE)
#define MEMMAP_BLOCKS_PER_BANK (0x10000 / MEMMAP_BLOCK_SIZE)
#define MEMMAP_SHIFT 12
#define MEMMAP_MASK (MEMMAP_BLOCK_SIZE - 1)
#define ONE_CYCLE 6

#define CYCLES %esi
#define PC %edi
#ifdef SPC700_C
#define APUPC APUPCS
#else
#define APUPC %ebp
#endif

#define FLAGS %bl
#define FLAGS16 %bx

#define LOAD_CYCLES movl Cycles, CYCLES
#define SAVE_CYCLES movl CYCLES, Cycles

.macro LOAD_REGISTERS
	LOAD_CYCLES
	movl PCS, PC
#ifndef SPC700_C
	movl APUPCS, APUPC
#endif
	movw PP, FLAGS16
.endm

.macro STORE_REGISTERS
	SAVE_CYCLES
	movl PC, PCS
#ifndef SPC700_C
	movl APUPC, APUPCS
#endif
	movw FLAGS16, PP
.endm

.macro PUSH_REGISTERS
	pushl %ebp
	pushl %edi
	pushl %esi
	pushl %ebx
.endm

.macro POP_REGISTERS
	popl %ebx
	popl %esi
	popl %edi
	popl %ebp
.endm

.macro ccall name
	call \name
.endm