snes9x/i386/fxemu2c.mac

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2010-09-25 15:46:12 +00:00
;Copyright (C) 1997-2001 ZSNES Team ( zsknight@zsnes.com / _demo_@zsnes.com )
;
;This program is free software; you can redistribute it and/or
;modify it under the terms of the GNU General Public License
;as published by the Free Software Foundation; either
;version 2 of the License, or (at your option) any later
;version.
;
;This program is distributed in the hope that it will be useful,
;but WITHOUT ANY WARRANTY; without even the implied warranty of
;MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;GNU General Public License for more details.
;
;You should have received a copy of the GNU General Public License
;along with this program; if not, write to the Free Software
;Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
%macro FXReturn 0
dec dword [NumberOfOpcodes]
jmp [FxTabled+ecx*4]
ALIGN32
%endmacro
%macro FXReturn2 0
dec dword [NumberOfOpcodes]
js %%endloop
jmp [FxTabled+ecx*4]
%%endloop
jmp FXEndLoop
; jmp [FxTabled+ecx*4]
ALIGN32
%endmacro
%macro TORNd 1 ; V
FETCHPIPE
mov edi, SfxR0+%1*4
inc ebp ; Increase program counter
call [FxTable+ecx*4]
mov edi,SfxR0
FXReturn
%endmacro
%macro WITHc 1 ; Verified.
FETCHPIPE
mov esi,SfxR0+%1*4
mov edi,SfxR0+%1*4
mov dword [SfxB],1
inc ebp ; Increase program counter
call [FxTablec+ecx*4]
mov esi,SfxR0
mov edi,SfxR0
mov dword [SfxB],0 ; Clear B Flag
FXReturn
%endmacro
%macro STWRNc 1 ; V
mov eax,[SfxR0+%1*4] ; Read register
mov ebx,[SfxRAMMem]
mov dword [SfxLastRamAdr],eax ; Save last ram address
add dword [SfxLastRamAdr],ebx ; Save last ram address
mov edx,[esi] ; Read Source
FETCHPIPE
mov [ebx+eax],dl ; Store Word
xor eax,1
inc ebp ; Increase program counter
mov [ebx+eax],dh ; Store Word
CLRFLAGS
FXReturn
%endmacro
%macro STBRNc 1 ; V
mov eax,[SfxR0+%1*4] ; Read register
FETCHPIPE
add eax,[SfxRAMMem]
mov dword [SfxLastRamAdr],eax ; Save last ram address
mov ebx,[esi] ; Read Source
mov byte [eax],bl ; Store Byte
CLRFLAGS
inc ebp ; Increase program counter
FXReturn
%endmacro
%macro LDWRNc 1 ; V
mov eax,[SfxR0+%1*4] ; Read register
mov ebx,[SfxRAMMem]
mov dword [SfxLastRamAdr],eax ; Save last ram address
FETCHPIPE
mov dl,[ebx+eax] ; Store Word
add dword [SfxLastRamAdr],ebx ; Save last ram address
xor eax,1
and edx,0FFFFh
inc ebp ; Increase program counter
mov dh,[ebx+eax] ; Store Word
mov [edi],edx ; Read Source
CLRFLAGS
FXReturn
%endmacro
%macro LDBRNc 1 ; V
mov eax,[SfxR0+%1*4] ; Read register
FETCHPIPE
add eax,[SfxRAMMem]
xor ebx,ebx
mov dword [SfxLastRamAdr],eax ; Save last ram address
mov bl,[eax] ; Read Byte
inc ebp ; Increase program counter
mov [edi],ebx ; Store Result
CLRFLAGS
FXReturn
%endmacro
%macro ADDRNc 1 ; V
mov eax, [esi] ; Read Source
mov ebx, [SfxR0+%1*4]
FETCHPIPE
add ax,bx
seto byte[SfxOverflow]
setc byte[SfxCarry]
mov [SfxSignZero],eax
inc ebp ; Increase program counter
mov [edi],eax ; Write Destination
CLRFLAGS
FXReturn
%endmacro
%macro ADCRNc 1 ; V
FETCHPIPE
mov eax, [esi] ; Read Source
mov ebx, [SfxR0+%1*4]
shr byte[SfxCarry],1
adc ax,bx
seto byte[SfxOverflow]
setc byte[SfxCarry]
mov [SfxSignZero],eax
inc ebp ; Increase program counter
mov [edi],eax ; Write Destination
CLRFLAGS
FXReturn
%endmacro
%macro ADIRNc 1 ; V
mov eax, [esi] ; Read Source
FETCHPIPE
add ax,%1
seto byte[SfxOverflow]
setc byte[SfxCarry]
mov [SfxSignZero],eax
inc ebp ; Increase program counter
mov [edi],eax ; Write Destination
CLRFLAGS
FXReturn
%endmacro
%macro ADCIRNc 1 ; V
FETCHPIPE
mov eax, [esi] ; Read Source
shr byte[SfxCarry],1
adc ax,%1
seto byte[SfxOverflow]
setc byte[SfxCarry]
mov [SfxSignZero],eax
inc ebp ; Increase program counter
mov [edi],eax ; Write Destination
CLRFLAGS
FXReturn
%endmacro
%macro SUBRNc 1 ; V
mov eax,[esi] ; Read Source
mov ebx,[SfxR0+%1*4]
FETCHPIPE
sub ax,bx
seto byte[SfxOverflow]
setc byte[SfxCarry]
xor byte[SfxCarry],1
inc ebp ; Increase program counter
mov [edi],eax ; Write Destination
mov [SfxSignZero],eax
CLRFLAGS
FXReturn
%endmacro
%macro SBCRNc 1 ; V
FETCHPIPE
mov eax,[esi] ; Read Source
mov ebx,[SfxR0+%1*4]
cmp byte[SfxCarry],1
sbb ax,bx
seto byte[SfxOverflow]
setc byte[SfxCarry]
xor byte[SfxCarry],1
inc ebp ; Increase program counter
mov [edi],eax ; Write Destination
mov [SfxSignZero],eax
CLRFLAGS
FXReturn
%endmacro
%macro SUBIRNc 1 ; V
mov eax,[esi] ; Read Source
FETCHPIPE
sub ax,%1
seto byte[SfxOverflow]
setc byte[SfxCarry]
xor byte[SfxCarry],1
inc ebp ; Increase program counter
mov [edi],eax ; Write Destination
mov [SfxSignZero],eax
CLRFLAGS
FXReturn
%endmacro
%macro CMPRNc 1 ; V
mov eax,[esi] ; Read Source
mov ebx,[SfxR0+%1*4]
FETCHPIPE
sub ax,bx
seto byte[SfxOverflow]
setc byte[SfxCarry]
xor byte[SfxCarry],1
mov [SfxSignZero],eax
CLRFLAGS
inc ebp ; Increase program counter
FXReturn
%endmacro
%macro ANDRNc 1 ; V
mov eax,[esi] ; Read Source
mov ebx,[SfxR0+%1*4] ; Read RN
FETCHPIPE
and eax,ebx
inc ebp
mov dword [SfxSignZero],eax
mov [edi],eax ; Write Destination
CLRFLAGS
FXReturn
%endmacro
%macro BICRNc 1 ; V
mov ebx,[SfxR0+%1*4] ; Read RN
mov eax,[esi] ; Read Source
xor ebx,0FFFFh
FETCHPIPE
and eax,ebx
inc ebp
mov dword [SfxSignZero],eax
mov [edi],eax ; Write Destination
CLRFLAGS
FXReturn
%endmacro
%macro ANDIRNc 1 ; V
mov eax,[esi] ; Read Source
FETCHPIPE
and eax,%1
inc ebp
mov dword [SfxSignZero],eax
mov [edi],eax ; Write Destination
CLRFLAGS
FXReturn
%endmacro
%macro BICIRNc 1 ; V
mov eax,[esi] ; Read Source
FETCHPIPE
and eax,%1
inc ebp
mov dword [SfxSignZero],eax
mov [edi],eax ; Write Destination
CLRFLAGS
FXReturn
%endmacro
%macro MULTRNc 1 ; V
mov al,byte [esi] ; Read Source
mov bl,byte [SfxR0+%1*4] ; Read RN
FETCHPIPE
imul bl
inc ebp
and eax,0FFFFh
mov [SfxSignZero],eax
mov [edi],eax ; Write Destination
CLRFLAGS
FXReturn
%endmacro
%macro UMULTRNc 1 ; V
mov al,byte [esi] ; Read Source
mov bl,byte [SfxR0+%1*4] ; Read RN
FETCHPIPE
mul bl
inc ebp
and eax,0FFFFh
mov [SfxSignZero],eax
mov [edi],eax ; Write Destination
CLRFLAGS
FXReturn
%endmacro
%macro MULTIRNc 1 ; V
mov al,byte [esi] ; Read Source
mov bl,%1 ; Read RN
FETCHPIPE
imul bl
inc ebp
and eax,0FFFFh
mov [SfxSignZero],eax
mov [edi],eax ; Write Destination
CLRFLAGS
FXReturn
%endmacro
%macro UMULTIRNc 1 ; V
mov al,byte [esi] ; Read Source
mov bl,%1 ; Read RN
FETCHPIPE
mul bl
inc ebp
and eax,0FFFFh
mov [SfxSignZero],eax
mov [edi],eax ; Write Destination
CLRFLAGS
FXReturn
%endmacro
%macro LINKc 1 ; Verified.
mov eax,ebp
sub eax,[SfxCPB]
add eax,%1
FETCHPIPE
mov word [SfxR11],ax
CLRFLAGS
inc ebp
FXReturn
%endmacro
%macro JMPRNc 1 ; V
FETCHPIPE
mov eax,[SfxR0+%1*4] ; Read RN
mov ebp,[SfxCPB]
add ebp,eax
CLRFLAGS
FXReturn
%endmacro
%macro LJMPRNc 1 ; V
FETCHPIPE
mov eax,[SfxR0+%1*4]
and eax,07Fh
mov byte[SfxPBR],al
; mov byte[fxtrace+eax],1
mov eax,[SfxMemTable+eax*4]
mov [SfxCPB],eax
mov ebp,eax
add ebp,[esi] ; Read RN
mov dword [SfxCacheActive],0
push ecx
call FxOp02
pop ecx
dec ebp
FXReturn
%endmacro
%macro IBTRNc 1 ; V
movsx eax,byte[ebp]
mov cl,[ebp+1]
add ebp,2
mov [SfxR0+%1*4],ax
CLRFLAGS
FXReturn
%endmacro
%macro LMSRNc 1 ; Verified.
xor eax,eax
mov al,[ebp]
add eax,eax
inc ebp
add eax,[SfxRAMMem]
mov cl,[ebp]
mov dword [SfxLastRamAdr],eax
mov ebx,[eax] ; Read word from ram
inc ebp
mov [SfxR0+%1*4],bx ; Write data
CLRFLAGS
FXReturn
%endmacro
%macro SMSRNc 1 ; Verified.
xor eax,eax
mov al,[ebp]
inc ebp
add eax,eax
mov cl,[ebp]
add eax,[SfxRAMMem]
mov ebx,[SfxR0+%1*4] ; Read data
mov dword [SfxLastRamAdr],eax
inc ebp
mov [eax],bx ; Write word to ram
CLRFLAGS
FXReturn
%endmacro
%macro FROMRNd 1 ; V
FETCHPIPE
mov esi,SfxR0+%1*4
inc ebp ; Increase program counter
call [FxTable+ecx*4]
mov esi,SfxR0
FXReturn
%endmacro
%macro ORRNc 1 ; V
mov eax,[esi] ; Read Source
mov ebx,[SfxR0+%1*4] ; Read
FETCHPIPE
or eax,ebx
inc ebp
mov [edi],eax ; Write DREG
mov [SfxSignZero],eax
CLRFLAGS
FXReturn
%endmacro
%macro XORRNc 1 ; V
mov eax,[esi] ; Read Source
mov ebx,[SfxR0+%1*4] ; Read
FETCHPIPE
xor eax,ebx
inc ebp
mov [edi],eax ; Write DREG
mov [SfxSignZero],eax
CLRFLAGS
FXReturn
%endmacro
%macro ORIc 1 ; V
mov eax,[esi] ; Read Source
FETCHPIPE
or eax,%1
inc ebp
mov [edi],eax ; Write DREG
mov [SfxSignZero],eax
CLRFLAGS
FXReturn
%endmacro
%macro XORIc 1 ; V
mov eax,[esi] ; Read Source
FETCHPIPE
xor eax,%1
inc ebp
mov [edi],eax ; Write DREG
mov [SfxSignZero],eax
CLRFLAGS
FXReturn
%endmacro
%macro INCRNc 1 ; Verified
inc word[SfxR0+%1*4]
FETCHPIPE
mov eax,[SfxR0+%1*4] ; Read Source
mov [SfxSignZero],eax
CLRFLAGS
inc ebp
FXReturn
%endmacro
%macro DECRNc 1 ; Verified
dec word[SfxR0+%1*4]
FETCHPIPE
mov eax,[SfxR0+%1*4] ; Read Source
mov [SfxR0+%1*4],eax
mov [SfxSignZero],eax
CLRFLAGS
inc ebp
FXReturn
%endmacro
%macro IWTRNc 1 ; aka LEA ; Verified.
mov eax,[ebp]
mov cl,[ebp+2]
and eax,0FFFFh
add ebp,3
mov [SfxR0+%1*4],eax
CLRFLAGS
FXReturn
%endmacro
%macro LMRNc 1 ; Verified!
xor eax,eax
mov cl,[ebp+2]
mov ax,[ebp]
mov ebx,[SfxRAMMem]
mov [SfxLastRamAdr],eax
add [SfxLastRamAdr],ebx
mov dl,[eax+ebx]
xor eax,1
add ebp,3
mov dh,[eax+ebx]
mov word [SfxR0+%1*4],dx ; Store Word
CLRFLAGS
FXReturn
%endmacro
%macro SMRNc 1 ; Verified
mov ebx,[SfxR0+%1*4]
mov eax,[ebp]
mov cl,[ebp+2]
and eax,0FFFFh
mov dx,bx
mov ebx,[SfxRAMMem]
mov [SfxLastRamAdr],eax
add [SfxLastRamAdr],ebx
mov [eax+ebx],dl
xor eax,1
add ebp,3
mov [eax+ebx],dh
CLRFLAGS
FXReturn
%endmacro