mirror of https://github.com/ZDoom/gzdoom-gles.git
Merge branch 'master' of https://github.com/rheit/zdoom
This commit is contained in:
Rachael Alexanderson
commit
4196a4d055
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@ -837,233 +837,6 @@ _R_DrawFuzzColumnP_ASM:
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ret
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;*----------------------------------------------------------------------
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;*
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;* R_DrawColumnHorizP_ASM
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;*
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;*----------------------------------------------------------------------
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GLOBAL @R_DrawColumnHorizP_ASM@0
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GLOBAL _R_DrawColumnHorizP_ASM
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GLOBAL R_DrawColumnHorizP_ASM
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align 16
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@R_DrawColumnHorizP_ASM@0:
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_R_DrawColumnHorizP_ASM:
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R_DrawColumnHorizP_ASM:
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; count = dc_yh - dc_yl;
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mov eax,[dc_yh]
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mov ecx,[dc_yl]
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sub eax,ecx
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mov edx,[dc_x]
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jl near .leave ; count < 0: nothing to do, so leave
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push ebp ; save registers
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push ebx
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push edi
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push esi
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inc eax ; make 0 count mean 0 pixels
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and edx,3
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push eax
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mov eax,[dc_temp]
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mov esi,[dc_ctspan+edx*4]
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add eax,edx
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lea eax,[eax+ecx*4] ; eax = top of column in buffer
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mov ebp,[dc_yh]
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mov [esi],ecx
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mov [esi+4],ebp
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add esi,8
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mov edi,[dc_source]
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mov [dc_ctspan+edx*4],esi
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mov esi,[dc_iscale]
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mov ecx,[dc_texturefrac] ; ecx = frac
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mov dl,[edi] ; load cache
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mov ebx,[esp]
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and ebx,0xfffffff8
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jnz .mthan8
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; Register usage in the following code is:
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;
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; eax: dest
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; edi: source
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; ecx: frac (16.16)
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; esi: fracstep (16.16)
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; ebx: add1
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; ebp: add2
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; dl: texel1
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; dh: texel2
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;[esp] count
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; there are fewer than 8 pixels to draw
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mov ebx,[esp]
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.lthan8 shr ebx,1
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jnc .even
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; do one pixel before loop (little opportunity for pairing)
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mov ebp,ecx ; copy frac to ebx
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add ecx,esi ; increment frac
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shr ebp,16 ; shift frac over to low end
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add eax,4
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mov dl,[edi+ebp]
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mov [eax-4],dl
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.even test ebx,ebx
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jz near .done
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.loop2 mov [esp],ebx ; save counter
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mov ebx,ecx ; copy frac for texel1 to ebx
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shr ebx,16 ; shift frac for texel1 to low end
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add ecx,esi ; increment frac
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mov ebp,ecx ; copy frac for texel2 to ebp
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shr ebp,16 ; shift frac for texel2 to low end
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add ecx,esi ; increment frac
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mov dl,[edi+ebx] ; read texel1
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mov ebx,[esp] ; fetch counter
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mov dh,[edi+ebp] ; read texel2
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mov [eax],dl ; write texel1
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mov [eax+4],dh ; write texel2
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add eax,8 ; increment dest
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dec ebx ; decrement counter
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jnz .loop2 ; loop until it hits 0
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jmp .done
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; there are more than 8 pixels to draw. position eax as close to a 32 byte
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; boundary as possible, then do whatever is left.
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.mthan8 test eax,4
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jz .try2
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mov ebp,ecx ; frac: in ebp
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add ecx,esi ; step
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shr ebp,16 ; frac: shift
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add eax,4 ; increment dest
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mov ebx,[esp] ; fetch counter
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mov dl,[edi+ebp] ; tex: read
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dec ebx ; decrement counter
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mov [eax-4],dl ; tex: write
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mov [esp],ebx ; store counter
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.try2 test eax,8
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jz .try4
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mov ebx,ecx ; frac1: in ebx
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add ecx,esi ; step
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shr ebx,16 ; frac1: shift
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mov ebp,ecx ; frac2: in ebp
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shr ebp,16 ; frac2: shift
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add ecx,esi ; step
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mov dl,[edi+ebx] ; tex1: read
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mov ebx,[esp] ; fetch counter
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mov dh,[edi+ebp] ; tex2: read
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mov [eax],dl ; tex1: write
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mov [eax+4],dh ; tex2: write
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sub ebx,2 ; decrement counter
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add eax,8 ; increment dest
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mov [esp],ebx ; store counter
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.try4 test eax,16
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jz .try8
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mov ebx,ecx ; frac1: in ebx
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add ecx,esi ; step
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shr ebx,16 ; frac1: shift
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mov ebp,ecx ; frac2: in ebp
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shr ebp,16 ; frac2: shift
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add ecx,esi ; step
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mov dl,[edi+ebx] ; tex1: read
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mov ebx,ecx ; frac3: in ebx
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shr ebx,16 ; frac3: shift
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mov dh,[edi+ebp] ; tex2: read
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add ecx,esi ; step
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mov [eax],dl ; tex1: write
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mov [eax+4],dh ; tex2: write
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mov ebp,ecx ; frac4: in ebp
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shr ebp,16 ; frac4: shift
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add ecx,esi ; step
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mov dl,[edi+ebx] ; tex3: read
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mov ebx,[esp] ; fetch counter
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mov dh,[edi+ebp] ; tex4: read
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sub ebx,4 ; decrement counter
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mov [esp],ebx ; store counter
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mov [eax+8],dl ; tex3: write
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mov [eax+12],dh ; tex4: write
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add eax,16 ; increment dest
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.try8 mov ebx,[esp] ; make counter count groups of 8
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sub esp,4
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shr ebx,3
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jmp .tail8
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align 16
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.loop8 mov [esp],ebx ; save counter
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mov ebx,ecx ; frac1: in ebx
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shr ebx,16 ; frac1: shift
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add ecx,esi ; step
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mov ebp,ecx ; frac2: in ebp
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shr ebp,16 ; frac2: shift
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add ecx,esi ; step
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mov dl,[edi+ebx] ; tex1: read
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mov ebx,ecx ; frac3: in ebx
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mov dh,[edi+ebp] ; tex2: read
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shr ebx,16 ; frac3: shift
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add ecx,esi ; step
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mov [eax],dl ; tex1: write
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mov [eax+4],dh ; tex2: write
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mov ebp,ecx ; frac4: in ebp
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shr ebp,16 ; frac4: shift
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add ecx,esi ; step
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mov dl,[edi+ebx] ; tex3: read
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mov ebx,ecx ; frac5: in ebx
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mov dh,[edi+ebp] ; tex4: read
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shr ebx,16 ; frac5: shift
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mov [eax+8],dl ; tex3: write
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mov [eax+12],dh ; tex4: write
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add ecx,esi ; step
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mov ebp,ecx ; frac6: in ebp
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shr ebp,16 ; frac6: shift
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mov dl,[edi+ebx] ; tex5: read
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add ecx,esi ; step
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mov ebx,ecx ; frac7: in ebx
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mov [eax+16],dl ; tex5: write
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shr ebx,16 ; frac7: shift
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mov dh,[edi+ebp] ; tex6: read
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add ecx,esi ; step
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mov ebp,ecx ; frac8: in ebp
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mov [eax+20],dh ; tex6: write
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shr ebp,16 ; frac8: shift
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add eax,32 ; increment dest pointer
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mov dl,[edi+ebx] ; tex7: read
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mov ebx,[esp] ; fetch counter
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mov [eax-8],dl ; tex7: write
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mov dh,[edi+ebp] ; tex8: read
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add ecx,esi ; step
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mov [eax-4],dh ; tex8: write
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mov dl,[eax] ; load cache
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dec ebx ; decrement counter
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.tail8 jnz near .loop8 ; loop if more to do
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pop ebp
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mov ebx,[esp]
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and ebx,7
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jnz near .lthan8
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.done pop eax
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pop esi
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pop edi
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pop ebx
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pop ebp
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.leave ret
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;*----------------------------------------------------------------------
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;*
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;* rt_copy1col_asm
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