getset.s

SFC游戏模拟器 snes9x 1.43 的原代码

/*** Renesas SH assembler *****************************************************
  SH assembler code partly based on x86 assembler code

  (c) Copyright 2002 - 2004 Marcus Comstedt ([e-mail])
******************************************************************************/

/******************************************************************************
  Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
 
  (c) Copyright 1996 - 2003 Gary Henderson ([e-mail]) and
                            Jerremy Koot ([e-mail])

  (c) Copyright 2002 - 2003 Matthew Kendora and
                            Brad Jorsch ([e-mail])
 

                      
  C4 x86 assembler and some C emulation code
  (c) Copyright 2000 - 2003 zsKnight ([e-mail]),
                            _Demo_ ([e-mail]), and
                            Nach ([e-mail])
                                          
  C4 C++ code
  (c) Copyright 2003 Brad Jorsch

  DSP-1 emulator code
  (c) Copyright 1998 - 2003 Ivar ([e-mail]), _Demo_, Gary Henderson,
                            John Weidman ([e-mail]),
                            neviksti ([e-mail]), and
                            Kris Bleakley ([e-mail])
 
  DSP-2 emulator code
  (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
                     Lord Nightmare ([e-mail]

  OBC1 emulator code
  (c) Copyright 2001 - 2003 zsKnight, pagefault ([e-mail])
  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-RTC C emulator code
  (c) Copyright 2001 John Weidman
  
  Super FX x86 assembler emulator code 
  (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault 

  Super FX C emulator code 
  (c) Copyright 1997 - 1999 Ivar and Gary Henderson.



 
  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.
******************************************************************************/

.text

.globl S9xGetByte_r

	! GetByte preserves r4

S9xGetByte_r:
	mov r4,r0
	mov #-MEMMAP_SHIFT,r3
	shld r3,r0
	mov.w .MEMMAP_MSK1,r3
	and r3,r0
#ifdef VAR_CYCLES
	mov.l .MemorySpeed0,r3
	mov.b @(r0,r3),r1
#endif
#ifdef CPU_SHUTDOWN
	mov.l .BlockIsRAM0,r3
	mov.b @(r0,r3),r2
#endif	
	shll2 r0
	mov.l .Map0,r3
	mov.l @(r0,r3),r3
	cmp/pz r3
	bt .GBSpecial
#ifdef CPU_SHUTDOWN
	tst r2,r2
	bt .GBNotRAM
	mov.l PCAtOpcodeStart,r2
	mov.l r2,WaitAddress
.GBNotRAM:
#endif	
	extu.w r4,r2
#ifdef VAR_CYCLES
	add r1,CYCLES
#endif
	add r2,r3
	mov.b @r3,r0
	rts
	extu.b r0,r0
	
.MEMMAP_MSK1:	
	.word MEMMAP_MASK

.GBSpecial:
	mova .GBJmpTable,r0
	shll2 r3
	add r3,r0
	mov.l @r0,r3
	jmp @r3
	nop


.GBPPU: /* MAP_PPU */
#ifdef VAR_CYCLES
	mov.b InDMA,r0
	tst r0,r0
	bf .GBPPU_NOADD
	add #6, CYCLES
.GBPPU_NOADD:
#endif
	SAVE_CYCLES
	PUSH_REGISTERS
	sts.l pr,@-r15
	mov.l .S9xGetPPU,r3
	mov.l r4,@-r15
	jsr @r3
	extu.w r4,r4
	mov.l @r15+,r4
	extu.b r0,r0
	lds.l @r15+,pr
	POP_REGISTERS
	rts
	LOAD_CYCLES


.GBCPU: /* MAP_CPU */
#ifdef VAR_CYCLES
	add #6, CYCLES
#endif
	SAVE_CYCLES
	PUSH_REGISTERS
	sts.l pr,@-r15
	mov.l .S9xGetCPU,r3
	mov.l r4,@-r15
	jsr @r3
	extu.w r4,r4
	mov.l @r15+,r4
	extu.b r0,r0
	lds.l @r15+,pr
	POP_REGISTERS
	rts
	LOAD_CYCLES


.GBDSP: /* MAP_DSP */
#ifdef VAR_CYCLES
	add #8, CYCLES
#endif
	SAVE_CYCLES
	PUSH_REGISTERS
	sts.l pr,@-r15
	mov.l .S9xGetDSP,r3
	mov.l r4,@-r15
	jsr @r3
	extu.w r4,r4
	mov.l @r15+,r4
	extu.b r0,r0
	lds.l @r15+,pr
	POP_REGISTERS
	rts
	LOAD_CYCLES


.GBLSRAM: /* MAP_LOROM_SRAM */
#ifdef VAR_CYCLES
	add #8, CYCLES
#endif
	mov.l .SRAM0,r3
	mov.l @r3,r3
	mov.l .SRAMMask0,r2
	mov.w @r2,r2
	extu.w r2,r2
	and r4,r2
	add r2,r3
	mov.b @r3,r0
	rts
	extu.b r0,r0
	

.GBHSRAM: /* MAP_HIROM_SRAM */
#ifdef VAR_CYCLES
	add #8, CYCLES
#endif
	mov.w .n7fffA,r3
	and r4,r3
	mov.w .n6000A,r2
	sub r2,r3
	mov.l .nf0000,r2
	and r4,r2
	shlr2 r2
	shlr r2
	add r2,r3
	mov.l .SRAM0,r1
	mov.l @r1,r0
	mov.l .SRAMMask0,r2
	mov.w @r2,r2
	extu.w r2,r2
	and r3,r2
	mov.b @(r0,r2),r0
	rts
	extu.b r0,r0


.GBNONE:
	extu.w	r4,r0
#ifdef VAR_CYCLES
	add #8, CYCLES
#endif
	rts
	shlr8	r0

.GBDEBUG: /* MAP_DEBUG */
#ifdef VAR_CYCLES
	add #8, CYCLES
#endif
	rts
	mov #0,r0

.GBC4: /* MAP_C4 */
#ifdef VAR_CYCLES
	add #8, CYCLES
#endif
	SAVE_CYCLES
	PUSH_REGISTERS
	sts.l pr,@-r15
	mov.l .S9xGetC4,r3
	mov.l r4,@-r15
	jsr @r3
	extu.w r4,r4
	mov.l @r15+,r4
	extu.b r0,r0
	lds.l @r15+,pr
	POP_REGISTERS
	rts
	LOAD_CYCLES
	
.GBBWRAM: /* MAP_BWRAM */
#ifdef VAR_CYCLES
	add #8, CYCLES
#endif
	mov.w .n7fffA,r3
	and r4,r3
	mov.w .n6000A,r2
	sub r2,r3
	mov.l .BWRAM0,r2
	mov.l @r2,r0
	mov.b @(r0,r3),r0
	rts
	extu.b r0,r0

.n7fffA:
	.word 0x7fff
.n6000A:
	.word 0x6000

.globl S9xGetWord_r


	! GetWord preserves r4

S9xGetWord_r:
	mov r4,r2
	mov.w .n1fff,r3
	and r3,r2
	cmp/eq r3,r2
	bf .GWNotAtBlockBoundary
	sts.l pr,@-r15
	bsr S9xGetByte_r
	nop
	mov.l r0,@-r15
	bsr S9xGetByte_r
	add #1,r4
	mov.l @r15+,r2
	shll8 r0
	lds.l @r15+,pr
	add #-1,r4
	rts
	or r2,r0

.n1fff:
	.word	0x1fff

.GWNotAtBlockBoundary:
	mov r4,r0
	mov #-MEMMAP_SHIFT,r3
	shld r3,r0
	mov.w .MEMMAP_MSK15,r3
	and r3,r0
#ifdef VAR_CYCLES
	mov.l .MemorySpeed0,r3
	mov.b @(r0,r3),r1
#endif
#ifdef CPU_SHUTDOWN
	mov.l .BlockIsRAM0,r3
	mov.b @(r0,r3),r2
#endif	
	shll2 r0
	mov.l .Map0,r3
	mov.l @(r0,r3),r3
	cmp/pz r3
	bt .GWSpecial
#ifdef CPU_SHUTDOWN
	tst r2,r2
	bt .GWNotRAM
	mov.l PCAtOpcodeStart,r2
	mov.l r2,WaitAddress
.GWNotRAM:
#endif	
	extu.w r4,r2
#ifdef VAR_CYCLES
	add r1,CYCLES
	add r1,CYCLES
#endif
	add r2,r3
	mov.b @r3+,r2
	mov.b @r3,r0
	extu.b r2,r2
	shll8 r0
	or r2,r0
	rts
	extu.w r0,r0

.MEMMAP_MSK15:	
	.word MEMMAP_MASK

.GWSpecial:
	mova .GWJmpTable,r0
	shll2 r3
	add r3,r0
	mov.l @r0,r3
	jmp @r3
	nop


.GWPPU: /* MAP_PPU */
#ifdef VAR_CYCLES
	mov.b InDMA,r0
	tst r0,r0
	bf .GWPPU_NOADD
	add #12, CYCLES
.GWPPU_NOADD:
#endif
	SAVE_CYCLES
	PUSH_REGISTERS
	sts.l pr,@-r15
	mov.l .S9xGetPPU,r3
	mov.l r4,@-r15
	jsr @r3
	extu.w r4,r4
	mov.l @r15,r4
	mov.l r0,@-r15
	mov.l .S9xGetPPU,r3
	add #1,r4
	jsr @r3
	extu.w r4,r4
	mov.l @r15+,r1
	shll8 r0
	mov.l @r15+,r4
	or r1,r0
	lds.l @r15+,pr
	POP_REGISTERS
	LOAD_CYCLES
	rts
	extu.w r0,r0

.GWCPU: /* MAP_CPU */
#ifdef VAR_CYCLES
	add #12, CYCLES
#endif
	SAVE_CYCLES
	PUSH_REGISTERS
	sts.l pr,@-r15
	mov.l .S9xGetCPU,r3
	mov.l r4,@-r15
	jsr @r3
	extu.w r4,r4
	mov.l @r15,r4
	mov.l r0,@-r15
	mov.l .S9xGetCPU,r3
	add #1,r4
	jsr @r3
	extu.w r4,r4
	mov.l @r15+,r1
	shll8 r0
	mov.l @r15+,r4
	or r1,r0
	lds.l @r15+,pr
	POP_REGISTERS
	LOAD_CYCLES
	rts
	extu.w r0,r0

.GWDSP: /* MAP_DSP */
#ifdef VAR_CYCLES
	add #16, CYCLES
#endif
	SAVE_CYCLES
	PUSH_REGISTERS
	sts.l pr,@-r15
	mov.l .S9xGetDSP,r3
	mov.l r4,@-r15
	jsr @r3
	extu.w r4,r4
	mov.l @r15,r4
	mov.l r0,@-r15
	mov.l .S9xGetDSP,r3
	add #1,r4
	jsr @r3
	extu.w r4,r4
	mov.l @r15+,r1
	shll8 r0
	mov.l @r15+,r4
	or r1,r0
	lds.l @r15+,pr
	POP_REGISTERS
	LOAD_CYCLES
	rts
	extu.w r0,r0

.GWLSRAM: /* MAP_LOROM_SRAM */
#ifdef VAR_CYCLES
	add #16, CYCLES
#endif
	mov.l .SRAM0,r3
	mov.l @r3,r0
	mov.l .SRAMMask0,r2
	mov.w @r2,r2
	extu.w r2,r2
	mov r2,r1
	and r4,r1
	mov.b @(r0,r1),r1
	add #1,r4
	extu.b r1,r1
	and r4,r2
	add #-1,r4
	mov.b @(r0,r2),r0
	shll8 r0
	or r1,r0
	rts
	extu.w r0,r0

.GWHSRAM: /* MAP_HIROM_SRAM */
#ifdef VAR_CYCLES
	add #16, CYCLES
#endif
	mov.w .n7fff,r3
	and r4,r3
	mov.w .n6000,r2
	sub r2,r3
	mov.l .nf0000,r2
	and r4,r2
	shlr2 r2
	shlr r2
	add r2,r3
	mov.l .SRAM0,r1
	mov.l @r1,r1
	mov.l .SRAMMask0,r2
	mov.w @r2,r2
	extu.w r2,r2
	and r3,r2
	add r2,r1
	mov.b @r1+,r2
	mov.b @r1,r0
	extu.b r2,r2
	shll8 r0
	or r2,r0
	rts
	extu.w r0,r0

.GWNONE:
	extu.w	r4,r0
	extu.b	r4,r1
	mov r0,r2
#ifdef VAR_CYCLES
	add #16, CYCLES
#endif
	shlr8	r0
	add	r2,r0
	rts
	sub	r1,r0

	
.GWDEBUG: /* MAP_DEBUG */
#ifdef VAR_CYCLES
	add #16, CYCLES
#endif
	rts
	mov #0,r0

.GWC4:
#ifdef VAR_CYCLES
	add #12, CYCLES
#endif
	SAVE_CYCLES
	PUSH_REGISTERS
	sts.l pr,@-r15
	mov.l .S9xGetC4,r3
	mov.l r4,@-r15
	jsr @r3
	extu.w r4,r4
	mov.l @r15,r4
	mov.l r0,@-r15
	mov.l .S9xGetC4,r3
	add #1,r4
	jsr @r3
	extu.w r4,r4
	mov.l @r15+,r1
	shll8 r0
	mov.l @r15+,r4
	or r1,r0
	lds.l @r15+,pr
	POP_REGISTERS
	LOAD_CYCLES
	rts
	extu.w r0,r0

	
.GWBWRAM: /* MAP_BWRAM */
#ifdef VAR_CYCLES
	add #16, CYCLES
#endif
	mov.w .n7fff,r3
	and r4,r3
	mov.w .n6000,r2
	sub r2,r3
	mov.l .BWRAM0,r2
	mov.l @r2,r2
	add r2,r3
	mov.b @r3+,r2
	mov.b @r3,r0
	extu.b r2,r2
	shll8 r0
	or r2,r0
	rts
	extu.w r0,r0

	.align 4

#ifdef VAR_CYCLES
.MemorySpeed0:
	.long MemorySpeed
#endif
#ifdef CPU_SHUTDOWN
.BlockIsRAM0:
	.long BlockIsRAM
#endif
.Map0:
	.long Map
	
.GBJmpTable:
	.long .GBPPU
	.long .GBCPU
	.long .GBDSP
	.long .GBLSRAM
	.long .GBHSRAM
	.long .GBNONE
	.long .GBDEBUG
	.long .GBC4
	.long .GBBWRAM
	.long .GBNONE
	.long .GBNONE
	.long .GBNONE

.GWJmpTable:
	.long .GWPPU
	.long .GWCPU
	.long .GWDSP
	.long .GWLSRAM
	.long .GWHSRAM
	.long .GWNONE
	.long .GWDEBUG
	.long .GWC4
	.long .GWBWRAM
	.long .GWNONE
	.long .GWNONE
	.long .GWNONE

.S9xGetPPU:
	.long _S9xGetPPU
.S9xGetCPU:
	.long _S9xGetCPU
.S9xGetDSP:
	.long _S9xGetDSP
.S9xGetC4:
	.long _S9xGetC4
.BWRAM0:	
	.long BWRAM
.SRAM0:
	.long SRAM
.SRAMMask0:
	.long SRAMMask
.nf0000:
	.long 0xf0000
.n7fff:
	.word 0x7fff
.n6000:
	.word 0x6000


.globl S9xSetByte_r
S9xSetByte_r:
#ifdef CPU_SHUTDOWN
	mov #0,r3
#endif	
	mov r4,r2
#ifdef CPU_SHUTDOWN
	mov.l r3,WaitAddress
#endif
	mov #-MEMMAP_SHIFT,r3
	shld r3,r2
	mov.w .MEMMAP_MSK175,r3
	and r3,r2
#ifdef VAR_CYCLES
	mov.l .MemorySpeed2,r3
	add r2,r3
	mov.b @r3,r5
#endif
	shll2 r2
	mov.l .WriteMap0,r3
	add r2,r3
	mov.l @r3,r3
	cmp/pz r3
	bt .SBSpecial
	extu.w r4,r2
#ifdef VAR_CYCLES
	add r5, CYCLES
#endif
#ifdef CPU_SHUTDOWN
	mov.l SA1,r1
	add r2,r3
	mov.l SA1WaitByteAddress1,r2
	cmp/eq r2,r3
	bt .Matched
	mov.l SA1WaitByteAddress2,r2
	cmp/eq r2,r3
	bf .NoMatch
.Matched:
	mov.l SA1Opcodes,r2
	mov.b r0,@r3
	mov #0,r0