mirror of
https://github.com/reactos/reactos.git
synced 2024-09-18 08:42:34 +00:00
58 lines
1.9 KiB
ArmAsm
58 lines
1.9 KiB
ArmAsm
/*
|
|
* PROJECT: Win32 subsystem
|
|
* LICENSE: See COPYING in the top level directory
|
|
* FILE: subsystems/win32/win32k/dib/i386/dib32bpp_hline.c
|
|
* PURPOSE: ASM optimised 32bpp HLine
|
|
* PROGRAMMERS: Magnus Olsen
|
|
*/
|
|
|
|
.globl _DIB_32BPP_HLine
|
|
.intel_syntax noprefix
|
|
|
|
.def _DIB_32BPP_HLine;
|
|
.scl 2;
|
|
.type 32;
|
|
.endef
|
|
|
|
_DIB_32BPP_HLine:
|
|
sub esp, 12 // rember the base is not hex it is dec
|
|
mov ecx, [esp+16]
|
|
mov [esp+4], ebx
|
|
mov edx, [esp+20] // edx = LONG x1
|
|
mov [esp+8], edi
|
|
mov edi, [esp+28]
|
|
mov eax, [ecx+36]
|
|
mov ebx, [esp+24] // ebx = LONG x2
|
|
imul eax, edi
|
|
mov edi, [ecx+32]
|
|
sub ebx, edx // cx = (x2 - x1) ;
|
|
add eax, edi
|
|
lea edx, [eax+edx*4]
|
|
mov [esp], edx
|
|
cld
|
|
mov eax, [esp+32]
|
|
mov edi, [esp]
|
|
test edi, 3 // Align to fullword boundary
|
|
jnz short _save_rest
|
|
mov ecx, ebx // Setup count of fullwords to fill
|
|
rep stosd
|
|
|
|
mov ebx, [esp+4]
|
|
mov edi, [esp+8]
|
|
add esp, 12
|
|
ret
|
|
_save_rest:
|
|
stosw
|
|
ror eax, 16
|
|
mov ecx, ebx // Setup count of fullwords to fill
|
|
dec ecx
|
|
rep stosd // The actual fill
|
|
shr eax, 16
|
|
stosw
|
|
|
|
mov ebx, [esp+4]
|
|
mov edi, [esp+8]
|
|
add esp, 12
|
|
ret
|
|
|