📄 cpuops.s

📁 著名SFC模拟器Snes9x的源代码。
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	addl $6, CYCLES#endif	movb AL, %al	PushByte PHA	jmp MainAsmLoopOp48M0:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw AA, %ax	PushWord PHA	jmp MainAsmLoop/* PHB */Op8B:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movb DB, %al	PushByte PHB	jmp MainAsmLoop/* PHD */Op0B:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw DD, %ax	PushWord PHD	jmp MainAsmLoop/* PHK */Op4B:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movb PB, %al	PushByte PHK	jmp MainAsmLoop/* PHP */Op08:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	S9xPackStatus PHP	movb FLAGS, %al	PushByte PHP	jmp MainAsmLoop/* PHX */OpDAX1:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movb XL, %al	PushByte PHX	jmp MainAsmLoopOpDAX0:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw XX, %ax	PushWord PHX	jmp MainAsmLoop/* PHY */Op5AX1:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movb YL, %al	PushByte PHY	jmp MainAsmLoopOp5AX0:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw YY, %ax	PushWord PHY	jmp MainAsmLoop/* PLA */Op68M1:#ifdef VAR_CYCLES	addl $12, CYCLES#endif	PullByte PLA	movb %al, AL	SetZN	jmp MainAsmLoopOp68M0:#ifdef VAR_CYCLES	addl $12, CYCLES#endif	PullWord PLA	movw %ax, AA	testw %ax, %ax	Set16ZN	jmp MainAsmLoop/* PLB */OpAB:#ifdef VAR_CYCLES	addl $12, CYCLES#endif	PullByte PLB	movb %al, DB	SetZN	andl $0xff, %eax	sall $16, %eax	movl %eax, ShiftedDB	jmp MainAsmLoop/* PLD */Op2B:#ifdef VAR_CYCLES	addl $12, CYCLES#endif	PullWord PLD	movw %ax, DD	testw %ax, %ax	Set16ZN	jmp MainAsmLoop	/* PLP */Op28:#ifdef VAR_CYCLES	addl $12, CYCLES#endif	PullByte PLP	movb %al, FLAGS	testb $IndexFlag, FLAGS	jz .PLP16	xorb %al, %al	movb %al, XH	movb %al, YH.PLP16:	S9xUnpackStatus PLP	S9xFixCycles PLP	CheckForIrq PLP	jmp MainAsmLoop/* PLX */OpFAX1:#ifdef VAR_CYCLES	addl $12, CYCLES#endif	PullByte PLX	movb %al, XL	SetZN	jmp MainAsmLoopOpFAX0:#ifdef VAR_CYCLES	addl $12, CYCLES#endif	PullWord PLX	movw %ax, XX	testw %ax, %ax	Set16ZN	jmp MainAsmLoop/* PLY */Op7AX1:#ifdef VAR_CYCLES	addl $12, CYCLES#endif	PullByte PLY	movb %al, YL	SetZN	jmp MainAsmLoopOp7AX0:#ifdef VAR_CYCLES	addl $12, CYCLES#endif	PullWord PLY	movw %ax, YY	testw %ax, %ax	Set16ZN	jmp MainAsmLoop/* SEC */Op38:	movb $1, _Carry#ifdef VAR_CYCLES	addl $6, CYCLES#endif	jmp MainAsmLoop/* SED */OpF8:		orb $Decimal, FLAGS#ifdef VAR_CYCLES	addl $6, CYCLES#endif	jmp MainAsmLoop/* SEI */Op78:	orb $IRQ, FLAGS#ifdef VAR_CYCLES	addl $6, CYCLES#endif	jmp MainAsmLoop/* TAX */OpAAX1:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movb AL, %al	movb %al, XL	SetZN	jmp MainAsmLoopOpAAX0:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw AA, %ax	movw %ax, XX	testw %ax, %ax	Set16ZN	jmp MainAsmLoop/* TAY */OpA8X1:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movb AL, %al	movb %al, YL	SetZN	jmp MainAsmLoopOpA8X0:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw AA, %ax	movw %ax, YY	testw %ax, %ax	Set16ZN	jmp MainAsmLoop/* TCD */Op5B:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw AA, %ax	movw %ax, DD	testw %ax, %ax	Set16ZN	jmp MainAsmLoop/* TCS */Op1B:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw AA, %ax	movw %ax, SS	testw $Emulation, FLAGS16	jz .TCS_EXIT	movb $1, SH.TCS_EXIT:	jmp MainAsmLoop/* TDC */Op7B:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw DD, %ax	movw %ax, AA	testw %ax, %ax	Set16ZN	jmp MainAsmLoop/* TSC */Op3B:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw SS, %ax	movw %ax, AA	testw %ax, %ax	Set16ZN	jmp MainAsmLoop/* TSX */OpBAX1:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movb SL, %al	movb %al, XL	SetZN	jmp MainAsmLoopOpBAX0:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw SS, %ax	movw %ax, XX	testw %ax, %ax	Set16ZN	jmp MainAsmLoop/* TXA */Op8AM1:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movb XL, %al	movb %al, AL	SetZN	jmp MainAsmLoopOp8AM0:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw XX, %ax	movw %ax, AA	testw %ax, %ax	Set16ZN	jmp MainAsmLoop/* TXS */Op9A:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw XX, %ax	movw %ax, SS	testw $Emulation, FLAGS16	jz .TXS_EXIT	movb $1, SH.TXS_EXIT:	jmp MainAsmLoop/* TXY */Op9BX1:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movb XL, %al	movb %al, YL	SetZN	jmp MainAsmLoopOp9BX0:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw XX, %ax	movw %ax, YY	testw %ax, %ax	Set16ZN	jmp MainAsmLoop/* TYA */Op98M1:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movb YL, %al	movb %al, AL	SetZN	jmp MainAsmLoopOp98M0:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw YY, %ax	movw %ax, AA	testw %ax, %ax	Set16ZN	jmp MainAsmLoop/* TYX */OpBBX1:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movb YL, %al	movb %al, XL	SetZN	jmp MainAsmLoopOpBBX0:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw YY, %ax	movw %ax, XX	testw %ax, %ax	Set16ZN	jmp MainAsmLoop/* XCE */OpFB:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movw FLAGS16, %ax	andw $~(Emulation | Carry), FLAGS16	GetCarry	jnc .XCE_NO_CARRY	orw $Emulation, FLAGS16.XCE_NO_CARRY:	testw $Emulation, %ax	setnz _Carry	testw $Emulation, FLAGS16	jz .XCE_NO_EMULATION2	orw $(MemoryFlag | IndexFlag), FLAGS16	movb $1, SH.XCE_NO_EMULATION2:	testw $IndexFlag, FLAGS16	jz .XCE_NO_INDEX	xorl %eax, %eax	movb %al, XH	movb %al, YH.XCE_NO_INDEX:	S9xFixCycles XCE	jmp MainAsmLoop		.data.LC0:	.string	"*** BRK".textOp00:#ifdef DEBUGGER	testb $TRACE_FLAG, Flags	je .BRK_NO_TRACE	pushl $.LC0	ccall S9xTraceMessage	addl $4,%esp.BRK_NO_TRACE:#endif	movb $1, BRKTriggered	testw $Emulation, FLAGS16	jnz .BRK_EMULATION	movb PB, %al	PushByte BRK1	movl PC, %eax	subl PCBase, %eax	incl %eax	PushWord BRK2		S9xPackStatus BRK	movb FLAGS, %al	andb $~Decimal, FLAGS	orb $IRQ, FLAGS		PushByte BRK3	xorl %ecx, %ecx	movl %ecx, ShiftedPB	movb %cl, PB#ifdef VAR_CYCLES	addl $12, CYCLES#else	addl $8, CYCLES#endif	movl $0xFFE6, %edx	call S9xGetWord	movl %eax, %edx	andl $0xffff, %edx	call S9xSetPCBase	jmp MainAsmLoop.BRK_EMULATION:	movl PC, %eax	subl PCBase, %eax	incl %eax	PushWord BRK2		S9xPackStatus BRK2	movb FLAGS, %al	andb $~Decimal, FLAGS	orb $IRQ, FLAGS		PushByte BRK3	xorl %ecx, %ecx	movl %ecx, ShiftedPB	movb %cl, PB#ifdef VAR_CYCLES	addl $6, CYCLES#else	addl $6, CYCLES#endif	movl $0xFFFE, %edx	call S9xGetWord	movl %eax, %edx	andl $0xffff, %edx	call S9xSetPCBase	jmp MainAsmLoop.data.LC1:	.string	"*** IRQ".text.globl S9xOpcode_IRQS9xOpcode_IRQ:#ifdef DEBUGGER	testb $TRACE_FLAG, Flags	je .IRQ_NO_TRACE	pushl $.LC1	ccall S9xTraceMessage	addl $4, %esp.IRQ_NO_TRACE:#endif	testw $Emulation, FLAGS16	jnz .IRQ_EMULATION	movb PB, %al	PushByte IRQ1	movl PC, %eax	subl PCBase, %eax	PushWord IRQ2		S9xPackStatus IRQ	movb FLAGS, %al	andb $~Decimal, FLAGS	orb $IRQ, FLAGS		PushByte IRQ3	xorl %ecx, %ecx	movl %ecx, ShiftedPB	movb %cl, PB#ifdef VAR_CYCLES	addl $12, CYCLES#else	addl $8, CYCLES#endif	testb $0xff, SA1Enabled	jz .noirqsa1vector	movl FillRAM, %eax	movb 0x2209(%eax), %dl	testb $0x40, %dl	jz .noirqsa1vector	xorl %edx, %edx	movw 0x220e(%eax), %dx	jmp S9xSetPCBase.noirqsa1vector:	movl $0xFFEE, %edx	call S9xGetWord	movl %eax, %edx	andl $0xffff, %edx	jmp S9xSetPCBase.IRQ_EMULATION:	movl PC, %eax	subl PCBase, %eax	PushWord IRQ4		S9xPackStatus IRQ2	movb FLAGS, %al	andb $~Decimal, FLAGS	orb $IRQ, FLAGS		PushByte IRQ5	xorl %ecx, %ecx	movl %ecx, ShiftedPB	movb %cl, PB#ifdef VAR_CYCLES	addl $6, CYCLES#else	addl $6, CYCLES#endif	movl $0xFFFE, %edx	call S9xGetWord	movl %eax, %edx	andl $0xffff, %edx	jmp S9xSetPCBase.data.LC2:	.string	"*** NMI".text.globl S9xOpcode_NMIS9xOpcode_NMI:#ifdef DEBUGGER	testb $TRACE_FLAG, Flags	je .NMI_NO_TRACE	pushl $.LC2	ccall S9xTraceMessage	addl $4, %esp.NMI_NO_TRACE:#endif	testw $Emulation, FLAGS16	jnz .NMI_EMULATION	movb PB, %al	PushByte NMI1	movl PC, %eax	subl PCBase, %eax	PushWord NMI2		S9xPackStatus NMI	movb FLAGS, %al	andb $~Decimal, FLAGS	orb $IRQ, FLAGS		PushByte NMI3	xorl %ecx, %ecx	movl %ecx, ShiftedPB	movb %cl, PB#ifdef VAR_CYCLES	addl $12, CYCLES#else	addl $8, CYCLES#endif	movl $0xFFEA, %edx	call S9xGetWord	movl %eax, %edx	andl $0xffff, %edx	jmp S9xSetPCBase.NMI_EMULATION:	movl PC, %eax	subl PCBase, %eax	PushWord NMI4		S9xPackStatus NMI2	movb FLAGS, %al	andb $~Decimal, FLAGS	orb $IRQ, FLAGS		PushByte NMI5	xorl %ecx, %ecx	movl %ecx, ShiftedPB	movb %cl, PB#ifdef VAR_CYCLES	addl $6, CYCLES#else	addl $6, CYCLES#endif	movl $0xFFFA, %edx	call S9xGetWord	movl %eax, %edx	andl $0xffff, %edx	jmp S9xSetPCBase.data.LC3:	.string	"*** COP".textOp02:#ifdef DEBUGGER	testb $TRACE_FLAG, Flags	je .COP_NO_TRACE	pushl $.LC3	ccall S9xTraceMessage	addl $4,%esp.COP_NO_TRACE:#endif	testw $Emulation, FLAGS16	jnz .COP_EMULATION	movb PB, %al	PushByte COP1	movl PC, %eax	subl PCBase, %eax	incl %eax	PushWord COP2		S9xPackStatus COP	movb FLAGS, %al	andb $~Decimal, FLAGS	orb $IRQ, FLAGS		PushByte COP3	xorl %ecx, %ecx	movl %ecx, ShiftedPB	movb %cl, PB#ifdef VAR_CYCLES	addl $12, CYCLES#else	addl $8, CYCLES#endif	movl $0xFFE4, %edx	call S9xGetWord	movl %eax, %edx	andl $0xffff, %edx	call S9xSetPCBase	jmp MainAsmLoop.COP_EMULATION:	movl PC, %eax	subl PCBase, %eax	incl %eax	PushWord COP4		S9xPackStatus COP2	movb FLAGS, %al	andb $~Decimal, FLAGS	orb $IRQ, FLAGS		PushByte COP5	xorl %ecx, %ecx	movl %ecx, ShiftedPB	movb %cl, PB#ifdef VAR_CYCLES	addl $6, CYCLES#else	addl $6, CYCLES#endif	movl $0xFFF4, %edx	call S9xGetWord	movl %eax, %edx	andl $0xffff, %edx	call S9xSetPCBase	jmp MainAsmLoop/* JML */OpDC:	AbsoluteIndirectLong8 JML	movl %edx, %ecx	andl $0xff0000, %ecx	movl %ecx, ShiftedPB	sarl $16, %ecx	movb %cl, PB#ifdef VAR_CYCLES	addl $12, CYCLES#endif	call S9xSetPCBase	jmp MainAsmLoopOp5C:	AbsoluteLong8 JML	movl %edx, %ecx	andl $0xff0000, %ecx	movl %ecx, ShiftedPB	sarl $16, %ecx	movb %cl, PB	call S9xSetPCBase	jmp MainAsmLoop/* JMP */Op4C:	Absolute8 JMP	andl $0xffff, %edx	orl  ShiftedPB, %edx	call S9xSetPCBase	jmp MainAsmLoopOp6C:	AbsoluteIndirect8 JMP	andl $0xffff, %edx	orl  ShiftedPB, %edx	call S9xSetPCBase	jmp MainAsmLoopOp7C:	AbsoluteIndexedIndirect8 JMP#ifdef VAR_CYCLES	addl $6, CYCLES#endif	andl $0xffff, %edx	orl ShiftedPB, %edx	call S9xSetPCBase	jmp MainAsmLoop/* JSL */Op22:	movb PB, %al	PushByte JSL_ABSL	movl PC, %eax	subl PCBase, %eax	addl $2, %eax	PushWord JSL_ABSL	AbsoluteLong8 JSL	movl %edx, %ecx	andl $0xff0000, %ecx	movl %ecx, ShiftedPB	sarl $16, %ecx	movb %cl, PB	call S9xSetPCBase	jmp MainAsmLoop/* RTL */Op6B:#ifdef VAR_CYCLES	addl $12, CYCLES#endif	PullWord RTL	pushl %eax	PullByte RTL	popl %edx	movb %al, PB	incw %dx	andl $0xff, %eax	andl $0xffff, %edx	sall $16, %eax	movl %eax, ShiftedPB	orl %eax, %edx	call S9xSetPCBase	jmp MainAsmLoop/* JSR ABS */Op20:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movl PC, %eax	subl PCBase, %eax	incl %eax	PushWord JSR_ABS	Absolute8 JSR_ABS	andl $0xffff, %edx	orl  ShiftedPB, %edx	call S9xSetPCBase	jmp MainAsmLoop/* JSR ABS INDEXED INDIRECT */OpFC:#ifdef VAR_CYCLES	addl $6, CYCLES#endif	movl PC, %eax	subl PCBase, %eax	incl %eax	PushWord JSR_AII	AbsoluteIndexedIndirect8 JSR	andl $0xffff, %edx	orl  ShiftedPB, %edx	call S9xSetPCBase	jmp MainAsmLoop/* RTS */Op60:#ifdef VAR_CYCLES	addl $6 * 3, CYCLES#endif	PullWord RTS	incl %eax	movl %eax, %edx	andl $0xffff, %edx	orl  ShiftedPB, %edx	call S9xSetPCBase	jmp MainAsmLoop/* MVN */Op54X1:#ifdef VAR_CYCLES	addl MemSpeedx2, CYCLES	addl $12, CYCLES#endif	xorl %edx, %edx	movb (PC), %dl	movb %dl, DB	sall $16, %edx	movl %edx, ShiftedDB	movb 1(PC), %dl	sall $16, %edx	movw XX, %dx	call S9xGetByte	movl ShiftedDB, %edx	movw YY, %dx	call S9xSetByte	incb XL	incb YL	movw AA, %ax	decw %ax	movw %ax, AA	cmpw $0xffff, %ax	je .MVN_EXIT8	decl PC	jmp MainAsmLoop.MVN_EXIT8:	addl $2, PC	jmp MainAsmLoopOp54X0:#ifdef VAR_CYCLES	addl MemSpeedx2, CYCLES	addl $12, CYCLES#endif	xorl %edx, %edx	movb (PC), %dl	movb %dl, DB	sall $16, %edx	movl %edx, ShiftedDB	movb 1(PC), %dl	sall $16, %edx	movw XX, %dx	call S9xGetByte	movl ShiftedDB, %edx	movw YY, %dx	call S9xSetByte	incw XX	incw YY	movw AA, %ax	decw %ax	movw %ax, AA	cmpw $0xffff, %ax	je .MVN_EXIT16	decl PC	jmp MainAsmLoop.MVN_EXIT16:	addl $2, PC	jmp MainAsmLoop/* MVP */Op44X1:#ifdef VAR_CYCLES	addl MemSpeedx2, CYCLES	addl $12, CYCLES#endif	xorl %edx, %edx	movb (PC), %dl	movb %dl, DB	sall $16, %edx	movl %edx, ShiftedDB	movb 1(PC), %dl	sall $16, %edx	movw XX, %dx	call S9xGetByte	movl ShiftedDB, %edx	movw YY, %dx	call S9xSetByte	decb XL	decb YL	movw AA, %ax	decw %ax	movw %ax, AA	cmpw $0xffff, %ax	je .MVP_EXIT8	decl PC	jmp MainAsmLoop.MVP_EXIT8:	addl $2, PC	jmp MainAsmLoopOp44X0:#ifdef VAR_CYCLES	addl MemSpeedx2, CYCLES	addl $12, CYCLES#endif	xorl %edx, %edx	movb (PC), %dl	movb %dl, DB	sall $16, %edx	movl %edx, ShiftedDB	movb 1(PC), %dl	sall $16, %edx	movw XX, %dx	call S9xGetByte	movl ShiftedDB, %edx	movw YY, %dx	call S9xSetByte	decw XX	decw YY	movw AA, %ax	decw %ax	movw %ax, AA	cmpw $0xffff, %ax	je .MVP_EXIT16	decl PC	jmp MainAsmLoop.MVP_EXIT16:	addl $2, PC	jmp MainAsmLoop/* REP */OpC2:#ifdef VAR_CYCLES	addl MemSpeed, CYCLES	addl $6, CYCLES#endif	movb (PC), %al	incl PC	notb %al	andb %al, FLAGS	andb %al, _Negative	andb %al, _Carry	testb $Zero, %al	setz %ah	orb %ah, _Zero	shrb $6, %al	andb %al, _Overflow	testw $Emulation, FLAGS16	jz .REP_NO_EMU	orb $(MemoryFlag | IndexFlag), FLAGS	.REP_NO_EMU:	testb $IndexFlag, FLAGS	jz .REP16	xorb %al, %al	movb %al, XH	movb %al, YH.REP16:	S9xFixCycles REP	CheckForIrq REP	jmp MainAsmLoop/* SEP */OpE2:#ifdef VAR_CYCLES	addl MemSpeed, CYCLES	addl $6, CYCLES#endif	movb (PC), %al	incl PC	orb %al, FLAGS	orb %al, _Negative	movb %al, %ah	shrb $6, %ah	andb $1, %ah	orb %ah, _Overflow	test $Zero, %al	jz .SEP_NO_ZERO	movb $0, _Zero.SEP_NO_ZERO:	andb $1, %al	orb %al, _Carry	testw $Emulation, FLAGS16	jz .SEP_NO_EMU	orb $(MemoryFlag | IndexFlag), FLAGS	.SEP_NO_EMU:	testb $IndexFlag, FLAGS	jz .SEP16	xorb %al, %al	movb %al, XH	movb %al, YH.SEP16:	S9xFixCycles SEP	jmp MainAsmLoop/* XBA */OpEB:#ifdef VAR_CYCLES	addl $12, CYCLES#endif	movb AL, %ah	movb AH, %al	movb %ah, AH	movb %al, AL	SetZN	jmp MainAsmLoop/* RTI */Op40:#ifdef VAR_CYCLES	addl $12, CYCLES#endif	PullByte RTI	movb %al, FLAGS	PullWord RTI	andl $0xffff, %eax	pushl %eax	testw $Emulation, FLAGS16	jnz .RTI_EMU	PullByte RTI2	andl $0xff, %eax	jmp .RTI_SKIP_EMU.RTI_EMU:	orb $(MemoryFlag | IndexFlag), FLAGS	/*XXX: HERE xorl %eax, %eax*/	movl ShiftedPB, %eax	sarl $16, %eax.RTI_SKIP_EMU:	movb %al, PB	popl %edx	sall $16, %eax	orl %eax, %edx	movl %eax, ShiftedPB	call S9xSetPCBase	testb $IndexFlag, FLAGS	jz .RTI16	xorb %al, %al	movb %al, XH	movb %al, YH.RTI16:	S9xUnpackStatus RTI	S9xFixCycles RTI	CheckForIrq RTI	jmp MainAsmLoop/* WAI */OpCB:#if 0	cmpb $0, IRQActive	je .L5334#ifdef VAR_CYCLES	addl $12, CYCLES#else	addl $2, CYCLES
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