sravan/system76-edk2
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1. Updated function headers for all assembly function

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2. Optimized register usage in SetMemXX functions in all lib instances
3. Fixed a logical error in CopyMem for all lib instances


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1139 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
bxing
2006-07-28 07:28:19 +00:00
parent 27169a56e6
commit eb227e96bd
106 changed files with 1006 additions and 457 deletions
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16
MdePkg/Library/BaseMemoryLibRepStr/Ia32/CopyMem.asm
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@@ -25,14 +25,22 @@
.model flat,C
.code
;------------------------------------------------------------------------------
; VOID *
; InternalMemCopyMem (
; IN VOID *Destination,
; IN VOID *Source,
; IN UINTN Count
; )
;------------------------------------------------------------------------------
InternalMemCopyMem PROC USES esi edi
mov esi, [esp + 16] ; esi <- Source
mov edi, [esp + 12] ; edi <- Destination
mov edx, [esp + 20] ; edx <- Count
lea eax, [edi + edx - 1] ; eax <- End of Destination
lea eax, [esi + edx - 1] ; eax <- End of Source
cmp esi, edi
jae @F
cmp eax, esi
cmp eax, edi
jae @CopyBackward ; Copy backward if overlapped
@@:
mov ecx, edx
@@ -41,8 +49,8 @@ InternalMemCopyMem PROC USES esi edi
rep movsd ; Copy as many Dwords as possible
jmp @CopyBytes
@CopyBackward:
mov edi, eax ; edi <- End of Destination
lea esi, [esi + edx - 1] ; esi <- End of Source
mov esi, eax ; esi <- End of Source
lea edi, [edi + edx - 1] ; edi <- End of Destination
std
@CopyBytes:
mov ecx, edx