makev16t.asm

linux下的任天堂模拟器代码。供大家参考。

NEWSYM drawspritesfulladdpriow
    sprprioritydrawt16b sprdrawpraw16bfa, sprdrawprbw16bfa, sprdrawpraw16b, sprdrawprbw16b

NEWSYM drawspritesfullsubprio
    ; full sub
    sprpriorityinit drawspritesfullsubpriow
    sprprioritydrawt16b sprdrawpra16bfs, sprdrawprb16bfs, sprdrawpra16b, sprdrawprb16b

NEWSYM drawspritesfullsubpriow
    sprprioritydrawt16b sprdrawpraw16bfs, sprdrawprbw16bfs, sprdrawpraw16b, sprdrawprbw16b


NEWSYM draw8x816bt
    cmp byte[bgmode],2
    je near draw8x816boffset
    cmp byte[bgmode],5
    je near draw16x816t
    mov [temp],al
    mov [bshifter],ah
    mov eax,esi
    mov [yadder],ecx
    mov [tempcach],ebx
    mov ebx,56
    sub ebx,ecx
    mov [yrevadder],ebx
    ; esi = pointer to video buffer
    mov esi,[cwinptr]
    sub esi,eax
    mov [winptrref],esi
    mov esi,[curvidoffset]
    sub esi,eax           ; esi = [vidbuffer] + curypos * 288 + 16 - HOfs
    sub esi,eax
    cmp byte[curmosaicsz],1
    je .nomosaic
    mov esi,xtravbuf+32
    mov ecx,128
.clearnext
    mov dword[esi],0
    add esi,4
    dec ecx
    jnz .clearnext
    mov esi,xtravbuf+32
    sub esi,eax
    sub esi,eax
.nomosaic
    mov [temptile],edx
    push ecx
    mov dword[bgsubby],262144
    mov ecx,[vcache2b]
    add ecx,262144
    mov [bgofwptr],ecx
    cmp dword[tempcach],ecx
    jb .nobit
    mov dword[bgsubby],131072
    mov ecx,[vcache4b]
    add ecx,131072
    mov [bgofwptr],ecx
    cmp dword[tempcach],ecx
    jb .nobit
    mov ecx,[vcache8b]
    add ecx,65536
    mov [bgofwptr],ecx
    mov dword[bgsubby],65536
.nobit
    pop ecx
; tile value : bit 15 = flipy, bit 14 = flipx, bit 13 = priority value
;              bit 10-12 = palette, 0-9=tile#
    cmp byte[curmosaicsz],1
    jne .domosaic
    cmp byte[winon],0
    jne near draw8x816btwinon
.domosaic
    mov ebp,transpbuf+32
    sub ebp,eax
    sub ebp,eax
    mov byte[tileleft16b],33
    mov byte[drawn],0
    mov dl,[temp]
.loopa
    mov ax,[edi]
    mov dh,ah
    add edi,2
    xor dh,[curbgpr]
    test dh,20h
    jnz near .hprior
    inc byte[drawn]
    and eax,03FFh                ; filter out tile #
    mov ebx,[tempcach]
    shl eax,6
    add ebx,eax
    cmp ebx,[bgofwptr]
    jb .noclip
    sub ebx,[bgsubby]
.noclip
    test dh,80h
    jz .normadd
    add ebx,[yrevadder]
    jmp .skipadd
.normadd
    add ebx,[yadder]
.skipadd
    test dh,40h
    jnz near .rloop

    ; Begin Normal Loop
    mov cl,[bshifter]
    and dh,1Ch
    shl dh,cl                    ; process palette # (bits 10-12)
    add dh,[bgcoloradder]
    xor eax,eax
    ; Start loop
    drawtilegrp draw8x816bta
.hprior
    add esi,16
    add ebp,16
    inc dl
    cmp dl,20h
    jne .loopc2
    mov edi,[temptile]
.loopc2
    dec byte[tileleft16b]
    jnz near .loopa
    cmp byte[drawn],0
    je .nodraw
    mov dh,[curmosaicsz]
    cmp dh,1
    jne near domosaic16b
.nodraw
    ret

    ; reversed loop
.rloop
    mov cl,[bshifter]
    and dh,1Ch
    shl dh,cl                    ; process palette # (bits 10-12)
    add dh,[bgcoloradder]
    xor eax,eax
    drawtilegrpf draw8x816bta
    add esi,16
    add ebp,16
    inc dl
    cmp dl,20h
    jne .loopc
    mov edi,[temptile]
.loopc
    dec byte[tileleft16b]
    jnz near .loopa
    cmp byte[drawn],0
    je .nodraw2
    mov dh,[curmosaicsz]
    cmp dh,1
    jne near domosaic16b
.nodraw2
    ret

NEWSYM draw8x816btwinon
    mov ebp,transpbuf+32
    sub ebp,eax
    sub ebp,eax
    mov byte[tileleft16b],33
    mov ecx,[winptrref]
    mov byte[drawn],0
    mov dl,[temp]
.loopa
    mov ax,[edi]
    mov dh,ah
    add edi,2
    xor dh,[curbgpr]
    test dh,20h
    jnz near .hprior
    inc byte[drawn]
    and eax,03FFh                ; filter out tile #
    mov ebx,[tempcach]
    shl eax,6
    add ebx,eax
    cmp ebx,[bgofwptr]
    jb .noclip
    sub ebx,[bgsubby]
.noclip
    test dh,80h
    jz .normadd
    add ebx,[yrevadder]
    jmp .skipadd
.normadd
    add ebx,[yadder]
.skipadd
    test dh,40h
    jnz near .rloop

    ; Begin Normal Loop
    mov eax,ecx
    mov cl,[bshifter]
    and dh,1Ch
    shl dh,cl                    ; process palette # (bits 10-12)
    add dh,[bgcoloradder]
    mov ecx,eax
    xor eax,eax
    ; Start loop
    drawtilegrp draw8x816btawinon
.hprior
    add esi,16
    add ecx,8
    add ebp,16
    inc dl
    cmp dl,20h
    jne .loopc2
    mov edi,[temptile]
.loopc2
    dec byte[tileleft16b]
    jnz near .loopa
    ret

    ; reversed loop
.rloop
    mov eax,ecx
    mov cl,[bshifter]
    and dh,1Ch
    shl dh,cl                    ; process palette # (bits 10-12)
    add dh,[bgcoloradder]
    mov ecx,eax
    xor eax,eax
    drawtilegrpf draw8x816btawinonb
    add esi,16
    add ecx,8
    add ebp,16
    inc dl
    cmp dl,20h
    jne .loopc
    mov edi,[temptile]
.loopc
    dec byte[tileleft16b]
    jnz near .loopa
    ret

NEWSYM draw8x816t
    cmp byte[osm2dis],1
    je .osm2dis
    cmp byte[bgmode],2
    je near draw8x816toffset
.osm2dis
    cmp byte[bgmode],5
    je near draw16x816t
    mov [temp],al
    mov [bshifter],ah
    mov eax,esi
    mov [yadder],ecx
    mov [tempcach],ebx
    mov ebx,56
    sub ebx,ecx
    mov [yrevadder],ebx
    ; esi = pointer to video buffer
    mov esi,[cwinptr]
    sub esi,eax
    mov [winptrref],esi
    mov esi,[curvidoffset]
    sub esi,eax           ; esi = [vidbuffer] + curypos * 288 + 16 - HOfs
    sub esi,eax
    cmp byte[curmosaicsz],1
    je .nomosaic
    mov esi,xtravbuf+32
    mov ecx,128
.clearnext
    mov dword[esi],0
    add esi,4
    dec ecx
    jnz .clearnext
    mov esi,xtravbuf+32
    sub esi,eax
    sub esi,eax
.nomosaic
    mov [temptile],edx
    push ecx
    mov dword[bgsubby],262144
    mov ecx,[vcache2b]
    add ecx,262144
    mov [bgofwptr],ecx
    cmp dword[tempcach],ecx
    jb .nobit
    mov dword[bgsubby],131072
    mov ecx,[vcache4b]
    add ecx,131072
    mov [bgofwptr],ecx
    cmp dword[tempcach],ecx
    jb .nobit
    mov ecx,[vcache8b]
    add ecx,65536
    mov [bgofwptr],ecx
    mov dword[bgsubby],65536
.nobit
    pop ecx
; tile value : bit 15 = flipy, bit 14 = flipx, bit 13 = priority value
;              bit 10-12 = palette, 0-9=tile#
    cmp byte[curmosaicsz],1
    jne .domosaic
    cmp byte[winon],0
    jne near draw8x816twinon
.domosaic
    mov ebp,transpbuf+32
    sub ebp,eax
    sub ebp,eax

    test byte[scaddtype],80h
    jnz near draw8x816ts
    test byte[scaddtype],40h
    jz near draw8x8fulladd
    cmp byte[scrnon+1],0
    jz near draw8x8fulladd

    mov byte[tileleft16b],33
    mov byte[drawn],0
    mov dl,[temp]
.loopa
    mov ax,[edi]
    mov dh,ah
    add edi,2
    xor dh,[curbgpr]
    test dh,20h
    jnz near .hprior
    inc byte[drawn]
    and eax,03FFh                ; filter out tile #
    mov ebx,[tempcach]
    shl eax,6
    add ebx,eax
    cmp ebx,[bgofwptr]
    jb .noclip
    sub ebx,[bgsubby]
.noclip
    test dh,80h
    jz .normadd
    add ebx,[yrevadder]
    jmp .skipadd
.normadd
    add ebx,[yadder]
.skipadd
    test dh,40h
    jnz near .rloop

    ; Begin Normal Loop
    mov cl,[bshifter]
    and dh,1Ch
    shl dh,cl                    ; process palette # (bits 10-12)
    add dh,[bgcoloradder]
    xor eax,eax
    xor ecx,ecx
    ; Start loop
    drawtilegrp draw8x816ta
.hprior
    add esi,16
    add ebp,16
    inc dl
    cmp dl,20h
    jne .loopc2
    mov edi,[temptile]
.loopc2
    dec byte[tileleft16b]
    jnz near .loopa
    cmp byte[drawn],0
    je .nodraw
    mov dh,[curmosaicsz]
    cmp dh,1
    jne near domosaic16b
.nodraw
    ret

    ; reversed loop
.rloop
    mov cl,[bshifter]
    and dh,1Ch
    shl dh,cl                    ; process palette # (bits 10-12)
    add dh,[bgcoloradder]
    xor eax,eax
    xor ecx,ecx
    drawtilegrpf draw8x816ta
    add esi,16
    add ebp,16
    inc dl
    cmp dl,20h
    jne .loopc
    mov edi,[temptile]
.loopc
    dec byte[tileleft16b]
    jnz near .loopa
    cmp byte[drawn],0
    je .nodraw2
    mov dh,[curmosaicsz]
    cmp dh,1
    jne near domosaic16b
.nodraw2
    ret

NEWSYM draw8x8fulladd
    mov byte[tileleft16b],33
    mov byte[drawn],0
    mov dl,[temp]
.loopa
    mov ax,[edi]
    mov dh,ah
    add edi,2
    push edi
    xor dh,[curbgpr]
    test dh,20h
    jnz near .hprior
    inc byte[drawn]
    and eax,03FFh                ; filter out tile #
    mov edi,[tempcach]
    shl eax,6
    add edi,eax
    cmp edi,[bgofwptr]
    jb .noclip
    sub edi,[bgsubby]
.noclip
    test dh,80h
    jz .normadd
    add edi,[yrevadder]
    jmp .skipadd
.normadd
    add edi,[yadder]
.skipadd
    test dh,40h
    jnz near .rloop

    ; Begin Normal Loop
    mov cl,[bshifter]
    and dh,1Ch
    shl dh,cl                    ; process palette # (bits 10-12)
    add dh,[bgcoloradder]
    xor eax,eax
    xor ecx,ecx
    ; Start loop
    drawtilegrpfull draw8x816tb
.hprior
    pop edi
    add esi,16
    add ebp,16
    inc dl
    cmp dl,20h
    jne .loopc2
    mov edi,[temptile]
.loopc2
    dec byte[tileleft16b]
    jnz near .loopa
    cmp byte[drawn],0
    je .nodraw
    mov dh,[curmosaicsz]
    cmp dh,1
    jne near domosaic16b
.nodraw
    ret

    ; reversed loop
.rloop
    mov cl,[bshifter]
    and dh,1Ch
    shl dh,cl                    ; process palette # (bits 10-12)
    add dh,[bgcoloradder]
    xor eax,eax
    xor ecx,ecx
    drawtilegrpfullf draw8x816tb
    pop edi
    add esi,16
    add ebp,16
    inc dl
    cmp dl,20h
    jne .loopc
    mov edi,[temptile]
.loopc
    dec byte[tileleft16b]
    jnz near .loopa
    cmp byte[drawn],0
    je .nodraw2
    mov dh,[curmosaicsz]
    cmp dh,1
    jne near domosaic16b
.nodraw2
    ret

NEWSYM draw8x816ts
    mov byte[tileleft16b],33
    mov byte[drawn],0
    mov dl,[temp]
.loopa
    mov ax,[edi]
    mov dh,ah
    add edi,2
    push edi
    xor dh,[curbgpr]
    test dh,20h
    jnz near .hprior
    inc byte[drawn]
    and eax,03FFh                ; filter out tile #
    mov edi,[tempcach]
    shl eax,6
    add edi,eax
    cmp edi,[bgofwptr]
    jb .noclip
    sub edi,[bgsubby]
.noclip
    test dh,80h
    jz .normadd
    add edi,[yrevadder]
    jmp .skipadd
.normadd
    add edi,[yadder]
.skipadd
    test dh,40h
    jnz near .rloop

    ; Begin Normal Loop
    mov cl,[bshifter]
    and dh,1Ch
    shl dh,cl                    ; process palette # (bits 10-12)
    add dh,[bgcoloradder]
    xor eax,eax
    xor ecx,ecx
    ; Start loop
    drawtilegrpfull draw8x816tc
.hprior
    pop edi
    add esi,16
    add ebp,16
    inc dl
    cmp dl,20h
    jne .loopc2
    mov edi,[temptile]
.loopc2
    dec byte[tileleft16b]
    jnz near .loopa
    ret

    ; reversed loop
.rloop
    mov cl,[bshifter]
    and dh,1Ch
    shl dh,cl                    ; process palette # (bits 10-12)
    add dh,[bgcoloradder]
    xor eax,eax
    xor ecx,ecx
    drawtilegrpfullf draw8x816tc
    pop edi
    add esi,16
    add ebp,16
    inc dl
    cmp dl,20h
    jne .loopc
    mov edi,[temptile]
.loopc
    dec byte[tileleft16b]
    jnz near .loopa
    ret

ALIGN32
SECTION .bss
NEWSYM coadder16, resd 1
SECTION .text

NEWSYM draw8x816twinon
    mov ebp,transpbuf+32
    sub ebp,eax
    sub ebp,eax
    test byte[scaddtype],80h
    jnz near draw8x816tswinon
    test byte[scaddtype],40h
    jz near draw8x8fulladdwinon
    cmp byte[scrnon+1],0
    jz near draw8x8fulladdwinon
    mov byte[tileleft16b],33
    mov edx,[winptrref]
    mov byte[drawn],0
.loopa
    mov ax,[edi]
    mov cl,ah
    add edi,2
    xor cl,[curbgpr]
    test cl,20h
    jnz near .hprior
    inc byte[drawn]
    and eax,03FFh                ; filter out tile #
    mov ebx,[tempcach]
    shl eax,6
    add ebx,eax
    cmp ebx,[bgofwptr]
    jb .noclip
    sub ebx,[bgsubby]
.noclip
    test cl,80h
    jz .normadd
    add ebx,[yrevadder]
    jmp .skipadd
.normadd
    add ebx,[yadder]
.skipadd
    test cl,40h
    jnz near .rloop

    ; Begin Normal Loop
    mov al,cl
    mov cl,[bshifter]
    and al,1Ch
    shl al,cl                    ; process palette # (bits 10-12)
    add al,[bgcoloradder]
    mov [coadder16],al
    xor eax,eax
    xor ecx,ecx
    ; Start loop
    drawtilegrp draw8x816tawinon
.hprior
    add esi,16
    add edx,8
    add ebp,16
    inc byte[temp]
    cmp byte[temp],20h
    jne .loopc2
    mov edi,[temptile]
.loopc2
    dec byte[tileleft16b]
    jnz near .loopa
    ret

    ; reversed loop
.rloop
    mov al,cl
    mov cl,[bshifter]
    and al,1Ch
    shl al,cl                    ; process palette # (bits 10-12)
    add al,[bgcoloradder]
    mov [coadder16],al
    xor eax,eax
    xor ecx,ecx
    drawtilegrpf draw8x816tawinonb
    add esi,16
    add edx,8
    add ebp,16
    inc byte[temp]
    cmp byte[temp],20h
    jne .loopc
    mov edi,[temptile]
.loopc
    dec byte[tileleft16b]
    jnz near .loopa
    ret

NEWSYM draw8x8fulladdwinon
    mov byte[tileleft16b],33
    mov edx,[winptrref]
    mov byte[drawn],0
.loopa
    mov ax,[edi]
    mov cl,ah
    add edi,2
    push edi
    xor cl,[curbgpr]
    test cl,20h
    jnz near .hprior
    inc byte[drawn]
    and eax,03FFh                ; filter out tile #
    mov edi,[tempcach]
    shl eax,6
    add edi,eax
    cmp edi,[bgofwptr]
    jb .noclip
    sub edi,[bgsubby]
.nocl