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asm version of DIB_32BPP_ColorFill:

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- Add frame pointer
- Get rid of algin_draw, 32bpp surfaces must be DWORD aligned
- Optimize the loop
- Add comments

svn path=/trunk/; revision=42353
This commit is contained in:
Timo Kreuzer 2009-08-02 22:31:29 +00:00
parent 8876d8092b
commit 341886a1c1
1 changed files with 53 additions and 69 deletions
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114
reactos/subsystems/win32/win32k/dib/i386/dib32bpp_colorfill.s
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@ -4,78 +4,62 @@
* FILE: subsystems/win32/win32k/dib/i386/dib32bpp_colorfill.c
* PURPOSE: ASM optimised 32bpp ColorFill
* PROGRAMMERS: Magnus Olsen
* Timo Kreuzer (timo.kreuzer@rectos.org)
*/
.globl _DIB_32BPP_ColorFill
.intel_syntax noprefix
.intel_syntax noprefix
.def _DIB_32BPP_ColorFill;
.scl 2;
.type 32;
.endef
/*
* BOOLEAN
* _cdecl
* DIB_32BPP_ColorFill(SURFOBJ* pso, RECTL* prcl, ULONG iColor);
*/
_DIB_32BPP_ColorFill:
sub esp, 24
mov ecx, [esp+32]
mov [esp+8], ebx
mov ebx, [esp+28]
mov [esp+20], ebp
mov ebp, [esp+36]
mov [esp+12], esi
mov [esp+16], edi
mov edi, [ecx]
mov esi, [ecx+8]
mov edx, [ebx+36]
sub esi, edi
mov edi, [ecx+4]
mov eax, edi
imul eax, edx
add eax, [ebx+32]
mov ebx, [ecx]
lea eax, [eax+ebx*4]
mov [esp+4], eax
mov eax, [ecx+12]
cmp eax, edi
jbe end
sub eax, edi
mov [esp], eax
lea esi, [esi+0]
.globl _DIB_32BPP_ColorFill
_DIB_32BPP_ColorFill:
push ebp
mov ebp, esp
push ebx
push esi
push edi
sub esp, 4 /* Space for lDelta */
for_loop:
mov eax, ebp
mov edx, [ebp+12] /* edx = prcl */
mov ecx, [ebp+8] /* ecx = pso */
mov ebx, [ecx+0x24] /* ebx = pso->lDelta; */
mov [esp], ebx /* lDelta = pso->lDelta; */
mov edi, [edx+4] /* edi = prcl->top; */
mov eax, edi /* eax = prcl->top; */
imul eax, ebx /* eax = prcl->top * pso->lDelta; */
add eax, [ecx+0x20] /* eax += pso->pvScan0; */
mov ebx, [edx] /* ebx = prcl->left; */
lea esi, [eax+ebx*4] /* esi = pvLine0 = eax + 4 * prcl->left; */
mov ebx, [edx+8] /* ebx = prcl->right; */
sub ebx, [edx] /* ebx = prcl->right - prcl->left; */
jbe end /* if (ebx <= 0) goto end; */
mov edx, [edx+12] /* edx = prcl->bottom; */
sub edx, edi /* edx -= prcl->top; */
jbe end /* if (eax <= 0) goto end; */
mov eax, [ebp+16] /* eax = iColor; */
cld
mov ebx, esi
mov edi, [esp+4]
test edi, 3
jnz algin_draw
mov ecx, esi
rep stosd
add [esp+4], edx
dec dword ptr [esp]
jnz for_loop
end:
mov ebx, [esp+8]
mov eax, 1
mov esi, [esp+12]
mov edi, [esp+16]
mov ebp, [esp+20]
add esp, 24
ret
algin_draw:
stosd
dec ebx
mov ecx, ebx
rol eax, 16
stosd
add [esp+4], edx
dec dword ptr [esp]
jnz for_loop
for_loop: /* do { */
mov edi, esi /* edi = pvLine0; */
mov ecx, ebx /* ecx = cx; */
rep stosd /* memset(pvLine0, iColor, cx); */
add esi, [esp] /* pvLine0 += lDelta; */
dec edx /* cy--; */
jnz for_loop /* } while (cy > 0); */
mov ebx, [esp+8]
end:
mov eax, 1
mov esi, [esp+12]
mov edi, [esp+16]
mov ebp, [esp+20]
add esp, 24
add esp, 4
pop edi
pop esi
pop ebx
pop ebp
ret