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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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13
MdePkg/Library/BaseMemoryLibSse2/x64/CopyMem.asm
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@@ -25,20 +25,21 @@
;------------------------------------------------------------------------------
; VOID *
; _mem_CopyMem (
; EFIAPI
; InternalMemCopyMem (
; IN VOID *Destination,
; IN VOID *Source,
; IN UINTN Count
; )
; );
;------------------------------------------------------------------------------
InternalMemCopyMem PROC USES rsi rdi
mov rsi, rdx ; rsi <- Source
mov rdi, rcx ; rdi <- Destination
lea r9, [rdi + r8 - 1] ; r9 <- Last byte of Destination
lea r9, [rsi + r8 - 1] ; r9 <- Last byte of Source
cmp rsi, rdi
mov rax, rdi ; rax <- Destination as return value
jae @F ; Copy forward if Source > Destination
cmp r9, rsi ; Overlapped?
cmp r9, rdi ; Overlapped?
jae @CopyBackward ; Copy backward if overlapped
@@:
xor rcx, rcx
@@ -65,8 +66,8 @@ InternalMemCopyMem PROC USES rsi rdi
movdqa xmm0, [rsp + 18h] ; restore xmm0
jmp @CopyBytes ; copy remaining bytes
@CopyBackward:
mov rdi, r9 ; rdi <- Last byte of Destination
lea rsi, [rsi + r8 - 1] ; rsi <- Last byte of Source
mov rsi, r9 ; rsi <- Last byte of Source
lea rdi, [rdi + r8 - 1] ; rdi <- Last byte of Destination
std
@CopyBytes:
mov rcx, r8