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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28
MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem.asm
View File

@@ -23,40 +23,44 @@
.686
.model flat,C
.xmm
.mmx
.code
;------------------------------------------------------------------------------
; VOID *
; _mem_SetMem (
; EFIAPI
; InternalMemSetMem (
; IN VOID *Buffer,
; IN UINTN Count,
; IN UINT8 Value
; )
;------------------------------------------------------------------------------
InternalMemSetMem PROC USES edi
mov al, [esp + 16]
mov ah, al
shrd edx, eax, 16
shld eax, edx, 16
mov ecx, [esp + 12] ; ecx <- Count
mov edi, [esp + 8] ; edi <- Buffer
mov edx, ecx
and edx, 7
shr ecx, 3 ; # of Qwords to set
mov al, [esp + 16] ; al <- Value
jz @SetBytes
mov ah, al ; ax <- Value | (Value << 8)
push ecx
push ecx
add esp, -10h
movq [esp], mm0 ; save mm0
movq [esp + 8], mm1 ; save mm1
movd mm0, eax
pshufw mm0, mm0, 0 ; fill mm0 with 8 Value's
movd mm1, eax
psllq mm0, 32
por mm0, mm1 ; fill mm0 with 8 Value's
@@:
movntq [edi], mm0
movq [edi], mm0
add edi, 8
loop @B
mfence
movq mm0, [esp] ; restore mm0
pop ecx ; stack cleanup
pop ecx
movq mm1, [esp + 8] ; restore mm1
add esp, 10h ; stack cleanup
@SetBytes:
and edx, 7
mov ecx, edx
rep stosb
mov eax, [esp + 8] ; eax <- Buffer as return value