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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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30
MdePkg/Library/BaseMemoryLibMmx/X64/SetMem32.asm
View File

@@ -23,23 +23,29 @@
.code
InternalMemSetMem32 PROC USES rdi
DB 49h, 0fh, 6eh, 0c0h ; movq mm0, r8 ; mm0 <- Value
mov rax, rcx ; rax <- Buffer
mov rdi, rax
mov rcx, rdx
shr rcx, 1
;------------------------------------------------------------------------------
; VOID *
; InternalMemSetMem32 (
; IN VOID *Buffer,
; IN UINTN Count,
; IN UINT32 Value
; )
;------------------------------------------------------------------------------
InternalMemSetMem32 PROC
DB 49h, 0fh, 6eh, 0c0h ; movd mm0, r8 (Value)
mov rax, rcx ; rax <- Buffer
xchg rcx, rdx ; rcx <- Count rdx <- Buffer
shr rcx, 1 ; rcx <- # of qwords to set
jz @SetDwords
DB 0fh, 70h, 0C0h, 44h ; pshufw mm0, mm0, 44h
DB 0fh, 70h, 0C0h, 44h ; pshufw mm0, mm0, 44h
@@:
DB 48h, 0fh, 0e7h, 07h ; movntq [rdi], mm0
add rdi, 8
DB 0fh, 0e7h, 02h ; movntq [rdx], mm0
lea rdx, [rdx + 8] ; use "lea" to avoid flag changes
loop @B
mfence
@SetDwords:
test dl, 1
jz @F
DB 0fh, 7eh, 07h ; movd [rdi], mm0
jnc @F
DB 0fh, 7eh, 02h ; movd [rdx], mm0
@@:
ret
InternalMemSetMem32 ENDP