Restore original algorithm and add comments

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4033 6f19259b-4bc3-4df7-8a09-765794883524
2007-10-06 21:59:01 +00:00 · 2007-10-06 21:59:01 +00:00 · 9b7c438b98
parent b3ad302e0f
commit 9b7c438b98
1 changed files with 2 additions and 3 deletions
--- a/MdePkg/Library/BaseMemoryLibRepStr/x64/SetMem.asm
+++ b/MdePkg/Library/BaseMemoryLibRepStr/x64/SetMem.asm
@ -33,12 +33,11 @@
 ;    )
 ;------------------------------------------------------------------------------
 InternalMemSetMem   PROC    USES    rdi
-    push    rcx        ; push Buffer
    mov     rax, r8    ; rax = Value
    mov     rdi, rcx   ; rdi = Buffer
-    mov     rcx, rdx   ; rcx = Count
+    xchg    rcx, rdx   ; rcx = Count, rdx = Buffer
    rep     stosb
-    pop     rax        ; rax = Buffer
+    mov     rax, rdx   ; rax = Buffer
    ret
 InternalMemSetMem   ENDP