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57 lines
1.8 KiB
ArmAsm
57 lines
1.8 KiB
ArmAsm
/*
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* PROJECT: Win32 subsystem
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* LICENSE: See COPYING in the top level directory
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* FILE: win32ss/gdi/dib/i386/dib32bpp_hline.s
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* PURPOSE: ASM optimised 32bpp HLine
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* PROGRAMMERS: Magnus Olsen
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*/
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#include <asm.inc>
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.code
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PUBLIC _DIB_32BPP_HLine
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_DIB_32BPP_HLine:
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sub esp, 12 // rember the base is not hex it is dec
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mov ecx, [esp+16]
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mov [esp+4], ebx
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mov edx, [esp+20] // edx = LONG x1
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mov [esp+8], edi
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mov edi, [esp+28]
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mov eax, [ecx+36]
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mov ebx, [esp+24] // ebx = LONG x2
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imul eax, edi
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mov edi, [ecx+32]
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sub ebx, edx // cx = (x2 - x1) ;
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add eax, edi
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lea edx, [eax+edx*4]
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mov [esp], edx
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cld
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mov eax, [esp+32]
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mov edi, [esp]
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test edi, 3 // Align to fullword boundary
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jnz short _save_rest
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mov ecx, ebx // Setup count of fullwords to fill
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rep stosd
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mov ebx, [esp+4]
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mov edi, [esp+8]
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add esp, 12
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ret
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_save_rest:
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stosw
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ror eax, 16
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mov ecx, ebx // Setup count of fullwords to fill
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dec ecx
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rep stosd // The actual fill
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shr eax, 16
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stosw
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mov ebx, [esp+4]
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mov edi, [esp+8]
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add esp, 12
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ret
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END
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