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Assembly for DIB_16BPP_VLine, nearly no performance increase, but could be useful later anyway.

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svn path=/trunk/; revision=15826
This commit is contained in:
Gregor Anich 2005-06-07 15:09:02 +00:00
parent 72448a5e50
commit 85b03712d5
1 changed files with 34 additions and 1 deletions
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35
reactos/subsys/win32k/dib/dib16bpp.c
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@ -90,7 +90,39 @@ DIB_16BPP_HLine(SURFOBJ *SurfObj, LONG x1, LONG x2, LONG y, ULONG c)
VOID
DIB_16BPP_VLine(SURFOBJ *SurfObj, LONG x, LONG y1, LONG y2, ULONG c)
{
{ /* 2610-2700 */
#ifdef _M_IX86
asm volatile(
" testl %2, %2" "\n\t"
" jle 2f" "\n\t"
" movl %2, %%ecx" "\n\t"
" shr $2, %2" "\n\t"
" andl $3, %%ecx" "\n\t"
" jz 1f" "\n\t"
"0:" "\n\t"
" movw %%ax, (%0)" "\n\t"
" addl %1, %0" "\n\t"
" decl %%ecx" "\n\t"
" jnz 0b" "\n\t"
" testl %2, %2" "\n\t"
" jz 2f" "\n\t"
"1:" "\n\t"
" movw %%ax, (%0)" "\n\t"
" addl %1, %0" "\n\t"
" movw %%ax, (%0)" "\n\t"
" addl %1, %0" "\n\t"
" movw %%ax, (%0)" "\n\t"
" addl %1, %0" "\n\t"
" movw %%ax, (%0)" "\n\t"
" addl %1, %0" "\n\t"
" decl %2" "\n\t"
" jnz 1b" "\n\t"
"2:" "\n\t"
: /* no output */
: "r"(SurfObj->pvScan0 + (y1 * SurfObj->lDelta) + (x * sizeof (WORD))),
"r"(SurfObj->lDelta), "r"(y2 - y1), "a"(c)
: "cc", "memory", "%ecx");
#else
PBYTE byteaddr = SurfObj->pvScan0 + y1 * SurfObj->lDelta;
PWORD addr = (PWORD)byteaddr + x;
LONG lDelta = SurfObj->lDelta;
@ -102,6 +134,7 @@ DIB_16BPP_VLine(SURFOBJ *SurfObj, LONG x, LONG y1, LONG y2, ULONG c)
byteaddr += lDelta;
addr = (PWORD)byteaddr;
}
#endif
}
BOOLEAN