diff options
Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/x64/EfiZeroMem.asm')
-rw-r--r-- | EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/x64/EfiZeroMem.asm | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/x64/EfiZeroMem.asm b/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/x64/EfiZeroMem.asm new file mode 100644 index 0000000000..5f2c077673 --- /dev/null +++ b/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/x64/EfiZeroMem.asm @@ -0,0 +1,53 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2007, 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
+; http://opensource.org/licenses/bsd-license.php
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+; Module Name:
+;
+; ZeroMem.asm
+;
+; Abstract:
+;
+; ZeroMem function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ .code
+
+;------------------------------------------------------------------------------
+; VOID *
+; EfiCommonLibZeroMem (
+; IN VOID *Buffer,
+; IN UINTN Size
+; );
+;------------------------------------------------------------------------------
+EfiCommonLibZeroMem PROC USES rdi
+ mov rdi, rcx
+ mov rcx, rdx
+ mov r8, rdi
+ and edx, 7
+ shr rcx, 3
+ jz @ZeroBytes
+ DB 0fh, 0efh, 0c0h ; pxor mm0, mm0
+@@:
+ DB 48h, 0fh, 7eh, 07h ; movd [rdi], mm0
+ add rdi, 8
+ loop @B
+@ZeroBytes:
+ xor eax, eax
+ mov ecx, edx
+ rep stosb
+ mov rax, r8
+ ret
+EfiCommonLibZeroMem ENDP
+
+ END
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