diff options
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S | 41 |
1 files changed, 20 insertions, 21 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S b/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S index bb2a194..eafd155 100644 --- a/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S +++ b/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S @@ -3,7 +3,7 @@ #
#------------------------------------------------------------------------------
#
-# Copyright (c) 2006 - 2008, Intel Corporation
+# Copyright (c) 2006 - 2009, Intel Corporation
# All rights reserved. This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
@@ -32,35 +32,34 @@ # IN UINTN Count
# );
#------------------------------------------------------------------------------
-.intel_syntax noprefix
ASM_GLOBAL ASM_PFX(InternalMemZeroMem)
ASM_PFX(InternalMemZeroMem):
- push rdi
- mov rdi, rcx
- xor rcx, rcx
- xor eax, eax
- sub rcx, rdi
- and rcx, 15
- mov r8, rdi
+ pushq %rdi
+ movq %rcx, %rdi
+ xorq %rcx, %rcx
+ xorl %eax, %eax
+ subq %rdi, %rcx
+ andq $15, %rcx
+ movq %rdi, %r8
jz L0
- cmp rcx, rdx
- cmova rcx, rdx
- sub rdx, rcx
+ cmpq %rdx, %rcx
+ cmova %rdx, %rcx
+ subq %rcx, %rdx
rep stosb
L0:
- mov rcx, rdx
- and edx, 15
- shr rcx, 4
+ movq %rdx, %rcx
+ andl $15, %edx
+ shrq $4, %rcx
jz L_ZeroBytes
- pxor xmm0, xmm0
+ pxor %xmm0, %xmm0
L1:
- movntdq [rdi], xmm0 # rdi should be 16-byte aligned
- add rdi, 16
+ movntdq %xmm0, (%rdi) # rdi should be 16-byte aligned
+ addq $16, %rdi
loop L1
mfence
L_ZeroBytes:
- mov ecx, edx
+ movl %edx, %ecx
rep stosb
- mov rax, r8
- pop rdi
+ movq %r8, %rax
+ popq %rdi
ret
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