📄 asmops.h

📁 SFC游戏模拟器 snes9x 1.43 的原代码
💻 H
字号:
/*******************************************************************************  Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.   (c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and                            Jerremy Koot (jkoot@snes9x.com)  (c) Copyright 2001 - 2004 John Weidman (jweidman@slip.net)  (c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net),                            funkyass (funkyass@spam.shaw.ca),                            Joel Yliluoma (http://iki.fi/bisqwit/)                            Kris Bleakley (codeviolation@hotmail.com),                            Matthew Kendora,                            Nach (n-a-c-h@users.sourceforge.net),                            Peter Bortas (peter@bortas.org) and                            zones (kasumitokoduck@yahoo.com)  C4 x86 assembler and some C emulation code  (c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com),                            _Demo_ (_demo_@zsnes.com), and Nach  C4 C++ code  (c) Copyright 2003 Brad Jorsch  DSP-1 emulator code  (c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson,                            John Weidman, neviksti (neviksti@hotmail.com),                            Kris Bleakley, Andreas Naive  DSP-2 emulator code  (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and                     Lord Nightmare (lord_nightmare@users.sourceforge.net  OBC1 emulator code  (c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) and                            Kris Bleakley  Ported from x86 assembler to C by sanmaiwashi  SPC7110 and RTC C++ emulator code  (c) Copyright 2002 Matthew Kendora with research by                     zsKnight, John Weidman, and Dark Force  S-DD1 C emulator code  (c) Copyright 2003 Brad Jorsch with research by                     Andreas Naive and John Weidman   S-RTC C emulator code  (c) Copyright 2001 John Weidman    ST010 C++ emulator code  (c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora  Super FX x86 assembler emulator code   (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault   Super FX C emulator code   (c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman  SH assembler code partly based on x86 assembler code  (c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)    Specific ports contains the works of other authors. See headers in  individual files.   Snes9x homepage: http://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.*******************************************************************************/.macro Adc8 K	testb $Decimal, FLAGS	jnz .ADC8Decimal\K	GetCarry	adcb AL, %al	SetZNCV	movb %al, AL	jmp MainAsmLoop.ADC8Decimal\K:	mov %al, %ah	mov AL, %dl	mov %al, %dh	andb $0x0f, %dl	andb $0x0f, %dh	add %dl, %dh	GetCarry	jnc .ADC8DecimalNoCarry\K	inc %dh.ADC8DecimalNoCarry\K:	cmp $0x1a, %dh	jb .ADC8DecimalNoAdj\K	andb $0xf7, AL	andb $0xf7, %al.ADC8DecimalNoAdj\K:	GetCarry	adcb AL, %al	daa	movb AL, %dl	movb %al, AL	SetZNC	xor %dl, %ah	not %ah	xor %al, %dl	and %dl, %ah	and $0x80, %ah	shr $7, %ah	mov %ah, _Overflow	jmp MainAsmLoop.endm.macro Adc16 K	testb $Decimal, FLAGS	jnz .ADC16Decimal\K	GetCarry	adcw AA, %ax	movw %ax, AA	setc _Carry	seto _Overflow	setnz _Zero	movb %ah, _Negative	jmp MainAsmLoop.ADC16Decimal\K:	push	%ecx	push	%esi	movsx	%ax, %edx	push	%edx	push	%edi	movw	AA, %si	and	$0xf000, %eax	mov	%edx, %edi	shl	$4, %eax	and	$0x0f00, %edi	or	%edi, %eax	mov	%edx, %edi	shl	$4, %eax	and	$0x00f0, %edi	and	$0x000f, %edx 	or	%edi, %eax	pop	%edi	movsx	%si, %ecx	shl	$4, %eax	or	%edx, %eax	and	$0xf000, %esi	mov	%ecx, %edx	shl	$4, %esi	and	$0x0f00, %edx	or	%edx, %esi	mov	%ecx, %edx	shl	$4, %esi	and	$0x00f0, %edx	and	$0x000f, %ecx	or	%edx, %esi	shl	$4, %esi	or	%ecx, %esi	mov	%esi, %ecx	or	$0x90909090, %eax	mov	$4, %esi.ADC16DecimalAddLoop\K:	GetCarry	adcb	%cl, %al	daa	setc	_Carry	shr	$8, %ecx	shrd	$4, %eax, %edx	shr	$8, %eax	dec	%esi	jne	.ADC16DecimalAddLoop\K	shr	$16, %edx	pop	%ecx	mov	AA, %ax	xor %cx, %ax	not %ax	xor %dx, %cx	and %cx, %ax	and $0x8000, %ax	shr $7, %ah	mov %ah, _Overflow	movw	%dx, AA	movb	%dh, _Negative	orb	%dh, %dl	movb	%dl, _Zero	pop	%esi	pop	%ecx	jmp MainAsmLoop.endm.macro Sbc8 K	testb $Decimal, FLAGS	jnz .SBC8Decimal\K	GetNotCarry	sbbb %al, AL	movb AL, %al	setnc _Carry	SetZNV	jmp MainAsmLoop.SBC8Decimal\K:	GetNotCarry	movb %al, %dl	movb AL, %al	sbbb %dl, %al	das	movb %al, AL	setnc _Carry	SetZNV	jmp MainAsmLoop.endm.macro Sbc16 K	testb $Decimal, FLAGS	jnz .SBC16Decimal\K	GetNotCarry	sbbw %ax, AA	setnc _Carry	setnz _Zero	seto _Overflow	movb AH, %al	movb %al, _Negative	jmp MainAsmLoop.SBC16Decimal\K:	movl %eax, %edx	movw AA, %ax	GetNotCarry	sbbb %dl, %al	das	movb %al, AL	movb %ah, %al	sbbb %dh, %al	das	movb %al, AH	setnc _Carry	seto _Overflow	movw AA, %ax	movb %ah, _Negative	orb %ah, %al	movb %al, _Zero	jmp MainAsmLoop.endm.macro Ora8 K	orb AL, %al	movb %al, AL	SetZN	jmp MainAsmLoop.endm.macro Ora16 K	orw AA, %ax	movw %ax, AA	Set16ZN	jmp MainAsmLoop.endm.macro Eor8 K	xorb AL, %al	movb %al, AL	SetZN	jmp MainAsmLoop.endm.macro Eor16 K	xorw AA, %ax	movw %ax, AA	Set16ZN	jmp MainAsmLoop.endm.macro And8 K	andb AL, %al	movb %al, AL	SetZN	jmp MainAsmLoop.endm.macro And16 K	andw AA, %ax	movw %ax, AA	Set16ZN	jmp MainAsmLoop.endm.macro Lda8 K	movb %al, AL	SetZN	jmp MainAsmLoop.endm.macro Lda16 K	movw %ax, AA	testw %ax, %ax	Set16ZN	jmp MainAsmLoop.endm.macro Ldx8 K	movb %al, XL	SetZN	jmp MainAsmLoop.endm.macro Ldx16 K	movw %ax, XX	testw %ax, %ax	Set16ZN	jmp MainAsmLoop.endm.macro Ldy8 K	movb %al, YL	SetZN	jmp MainAsmLoop.endm.macro Ldy16 K	movw %ax, YY	testw %ax, %ax	Set16ZN	jmp MainAsmLoop.endm.macro Cmp8 K	movb AL, %ah	subb %al, %ah	setnc _Carry	movb %ah, _Negative	movb %ah, _Zero	jmp MainAsmLoop.endm.macro Cmp16 K	movw AA, %dx	subw %ax, %dx	setnc _Carry	setnz _Zero	movb %dh, _Negative	jmp MainAsmLoop.endm.macro Cpx8 K	movb XL, %ah	subb %al, %ah	setnc _Carry	movb %ah, _Negative	movb %ah, _Zero	jmp MainAsmLoop.endm.macro Cpx16 K	movw XX, %dx	subw %ax, %dx	setnc _Carry	setnz _Zero	movb %dh, _Negative	jmp MainAsmLoop.endm.macro Cpy8 K	movb YL, %ah	subb %al, %ah	setnc _Carry	movb %ah, _Negative	movb %ah, _Zero	jmp MainAsmLoop.endm.macro Cpy16 K	movw YY, %dx	subw %ax, %dx	setnc _Carry	setnz _Zero	movb %dh, _Negative	jmp MainAsmLoop.endm.macro Asl8 K	pushl %edx	call S9xGetByte	addl $6, CYCLES	salb %al	SetZNC	popl %edx	call S9xSetByte	jmp MainAsmLoop.endm.macro Asl16 K	pushl %edx	call S9xGetWord	addl $6, CYCLES	salw %ax	Set16ZNC	popl %edx#if 0	call S9xSetWord#else	pushl %eax	pushl %edx	incl %edx	movb %ah, %al	call S9xSetByte	popl %edx	popl %eax	call S9xSetByte#endif	jmp MainAsmLoop.endm.macro Lsr8 K	pushl %edx	call S9xGetByte	addl $6, CYCLES	shrb %al	SetZNC	popl %edx	call S9xSetByte	jmp MainAsmLoop.endm.macro Lsr16 K	pushl %edx	call S9xGetWord	addl $6, CYCLES	shrw %ax	Set16ZNC	popl %edx#if 0	call S9xSetWord#else	pushl %eax	pushl %edx	incl %edx	movb %ah, %al	call S9xSetByte	popl %edx	popl %eax	call S9xSetByte#endif	jmp MainAsmLoop.endm.macro Rol8 K	pushl %edx	call S9xGetByte	addl $6, CYCLES	GetCarry	rclb %al	SetZNC	popl %edx	call S9xSetByte	jmp MainAsmLoop.endm.macro Rol16 K	pushl %edx	call S9xGetWord	addl $6, CYCLES	GetCarry	rclw %ax	setc _Carry	movb %ah, _Negative	testw %ax, %ax	setnz _Zero	popl %edx#if 0	call S9xSetWord#else	pushl %eax	pushl %edx	incl %edx	movb %ah, %al	call S9xSetByte	popl %edx	popl %eax	call S9xSetByte#endif	jmp MainAsmLoop.endm.macro Ror8 K	pushl %edx	call S9xGetByte	addl $6, CYCLES	GetCarry	rcrb %al	SetZNC	popl %edx	call S9xSetByte	jmp MainAsmLoop.endm.macro Ror16 K	pushl %edx	call S9xGetWord	addl $6, CYCLES	GetCarry	rcrw %ax	setc _Carry	movb %ah, _Negative	testw %ax, %ax	setnz _Zero	popl %edx#if 0	call S9xSetWord#else	pushl %eax	pushl %edx	incl %edx	movb %ah, %al	call S9xSetByte	popl %edx	popl %eax	call S9xSetByte#endif	jmp MainAsmLoop.endm.macro Bit8 K	call S9xGetByte	movb %al, _Negative	testb $0x40, %al	setnz _Overflow	andb AL, %al	movb %al, _Zero	jmp MainAsmLoop.endm.macro Bit16 K	call S9xGetWord	movb %ah, _Negative	testb $0x40, %ah	setnz _Overflow	andw AA, %ax	setnz _Zero	jmp MainAsmLoop.endm.macro Dec8 K	pushl %edx	addl $6, CYCLES	call S9xGetByte#ifdef CPU_SHUTDOWN	movl $0, WaitAddress#endif	decb %al	SetZN	popl %edx	call S9xSetByte	jmp MainAsmLoop.endm.macro Dec16 K	pushl %edx	addl $6, CYCLES	call S9xGetWord#ifdef CPU_SHUTDOWN	movl $0, WaitAddress#endif	decw %ax	Set16ZN	popl %edx#if 0	call S9xSetWord#else	pushl %eax	pushl %edx	incl %edx	movb %ah, %al	call S9xSetByte	popl %edx	popl %eax	call S9xSetByte#endif	jmp MainAsmLoop.endm.macro Inc8 K	pushl %edx	addl $6, CYCLES	call S9xGetByte#ifdef CPU_SHUTDOWN	movl $0, WaitAddress#endif	incb %al	SetZN	popl %edx	call S9xSetByte	jmp MainAsmLoop.endm.macro Inc16 K	pushl %edx	addl $6, CYCLES	call S9xGetWord#ifdef CPU_SHUTDOWN	movl $0, WaitAddress#endif	incw %ax	Set16ZN	popl %edx#if 0	call S9xSetWord#else	pushl %eax	pushl %edx	incl %edx	movb %ah, %al	call S9xSetByte	popl %edx	popl %eax	call S9xSetByte#endif	jmp MainAsmLoop.endm.macro Sta8 K	movb AL, %al	call S9xSetByte	jmp MainAsmLoop.endm.macro Sta16 K	movw AA, %ax	call S9xSetWord	jmp MainAsmLoop.endm.macro Stx8 K	movb XL, %al	call S9xSetByte	jmp MainAsmLoop.endm.macro Stx16 K	movw XX, %ax	call S9xSetWord	jmp MainAsmLoop.endm.macro Sty8 K	movb YL, %al	call S9xSetByte	jmp MainAsmLoop.endm.macro Sty16 K	movw YY, %ax	call S9xSetWord	jmp MainAsmLoop.endm.macro Stz8 K	xorb %al, %al	call S9xSetByte	jmp MainAsmLoop.endm.macro Stz16 K	xorl %eax, %eax	call S9xSetWord	jmp MainAsmLoop.endm.macro Trb8 K	pushl %edx	addl $6, CYCLES	call S9xGetByte	movb AL, %dl	testb %al, %dl	setnz _Zero	xorb $0xff, %dl	andb %dl, %al	popl %edx	call S9xSetByte	jmp MainAsmLoop.endm.macro Trb16 K	pushl %edx	addl $6, CYCLES	call S9xGetWord	movw AA, %dx	testw %ax, %dx	setnz _Zero	xorl $0xffffffff, %edx	andl %edx, %eax	popl %edx#if 0	call S9xSetWord#else	pushl %eax	pushl %edx	incl %edx	movb %ah, %al	call S9xSetByte	popl %edx	popl %eax	call S9xSetByte#endif	jmp MainAsmLoop.endm.macro Tsb8 K	pushl %edx	addl $6, CYCLES	call S9xGetByte	movb AL, %dl	testb %al, %dl	setnz _Zero	orb %dl, %al	popl %edx	call S9xSetByte	jmp MainAsmLoop.endm.macro Tsb16 K	pushl %edx	addl $6, CYCLES	call S9xGetWord	movw AA, %dx	testw %ax, %dx	setnz _Zero	orw %dx, %ax	popl %edx#if 0	call S9xSetWord#else	pushl %eax	pushl %edx	incl %edx	movb %ah, %al	call S9xSetByte	popl %edx	popl %eax	call S9xSetByte#endif	jmp MainAsmLoop.endm.macro CheckForIrq K	testb $0xff, IRQActive	jz .CheckForIrqS9xExit\K	testb $IRQ, FLAGS	jnz .CheckForIrqS9xExit\K	testb $0xff, DisableIRQ	jnz .CheckForIrqS9xExit\K	call S9xOpcode_IRQ.CheckForIrqS9xExit\K:.endm.macro S9xFixCycles K	testw $Emulation, FLAGS16	jz .S9xFixCyclesNoEmulation\K	movl $S9xOpcodesE1, CPUOpcodes	jmp .S9xFixCyclesS9xExit\K.S9xFixCyclesNoEmulation\K:		testb $MemoryFlag, FLAGS	jz .S9xFixCyclesNoMemory\K	testb $IndexFlag, FLAGS	jz .S9xFixCyclesNoIndex\K	movl $S9xOpcodesM1X1, CPUOpcodes	jmp .S9xFixCyclesS9xExit\K.S9xFixCyclesNoIndex\K:	movl $S9xOpcodesM1X0, CPUOpcodes	jmp .S9xFixCyclesS9xExit\K.S9xFixCyclesNoMemory\K:	testb $IndexFlag, FLAGS	jz .S9xFixCyclesNoIndex2\K	movl $S9xOpcodesM0X1, CPUOpcodes	jmp .S9xFixCyclesS9xExit\K.S9xFixCyclesNoIndex2\K:	movl $S9xOpcodesM0X0, CPUOpcodes.S9xFixCyclesS9xExit\K:.endm.macro S9xUnpackStatus K	movb FLAGS, %al	movb %al, _Negative	testb $Zero, %al	setz _Zero	testb $Carry, FLAGS	setnz _Carry	testb $Overflow, FLAGS	setnz _Overflow.endm.macro S9xPackStatus K//	movb _Carry, %al	andb $~(Zero | Negative | Carry | Overflow), FLAGS//	orb %al, FLAGS	movb _Negative, %al	andb $0x80, %al	orb _Carry, %al	orb %al, FLAGS	movb _Overflow, %al	salb $6, %al	orb %al, FLAGS	testb $0xff, _Zero	setz %al	salb %al	orb %al, FLAGS.endm.macro CPUShutdown K#ifdef CPU_SHUTDOWN	testb $0xff, Shutdown	jz .NoCPUShutdown\K	cmpl PC, WaitAddress	jne .NoCPUShutdown\K	cmpl $0, WaitCounter	jnz .CPUShutdownNotYet\K	movl Flags, %eax	andl $NMI_FLAG | IRQ_PENDING_FLAG, %eax	jnz .CPUShutdownNotYet\K		movl $0, WaitAddress	movl NextEvent, CYCLES	SAVE_CYCLES	ccall S9xUpdateAPUTimer	testb $0xff, APUExecuting	jz .NoCPUShutdown\K	pushl %edx	movb $0, CPUExecuting.CPUShutdownAPUExecLoop\K:#ifdef DEBUGGER	testb $2,APUFlags	je .CPUShutdownNoAPUTrace\K	STORE_REGISTERS	ccall S9xTraceAPU	LOAD_REGISTERS.CPUShutdownNoAPUTrace\K:#endif	xorl %eax,%eax#ifdef SPC700_C	movl APUPC, %edx	SAVE_CYCLES	movb (%edx),%al#else	movb (APUPC), %al#endif	movl S9xAPUCycles(,%eax,4), %edx	movl S9xApuOpcodes(,%eax,4),%eax	addl %edx, APUCycles	call *%eax#ifdef SPC700_C	LOAD_CYCLES#endif	movl NextEvent, %eax	cmpl %eax, APUCycles	jl .CPUShutdownAPUExecLoop\K		popl %edx	movb $1, CPUExecuting	jmp .NoCPUShutdown\K.CPUShutdownNotYet\K:	cmpl $2, WaitCounter	jb .CPUShutdownDecCounter\K	movl $1, WaitCounter	jp .NoCPUShutdown\K.CPUShutdownDecCounter\K:	decl WaitCounter.NoCPUShutdown\K:	#endif.endm
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -