diff options
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibSse2/x64/CopyMem.asm')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/x64/CopyMem.asm | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/x64/CopyMem.asm b/MdePkg/Library/BaseMemoryLibSse2/x64/CopyMem.asm index 955cd25f36..03ffe0c00f 100644 --- a/MdePkg/Library/BaseMemoryLibSse2/x64/CopyMem.asm +++ b/MdePkg/Library/BaseMemoryLibSse2/x64/CopyMem.asm @@ -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
|