diff options
Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/CompilerStub/x64/memset.asm')
-rw-r--r-- | EdkCompatibilityPkg/Foundation/Library/CompilerStub/x64/memset.asm | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/CompilerStub/x64/memset.asm b/EdkCompatibilityPkg/Foundation/Library/CompilerStub/x64/memset.asm new file mode 100644 index 0000000000..134700d912 --- /dev/null +++ b/EdkCompatibilityPkg/Foundation/Library/CompilerStub/x64/memset.asm @@ -0,0 +1,62 @@ +;------------------------------------------------------------------------------
+;
+; 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:
+;
+; SetMem.asm
+;
+; Abstract:
+;
+; memset function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ .code
+
+;------------------------------------------------------------------------------
+; VOID *
+; memset (
+; OUT VOID *Buffer, --> rcx
+; IN UINT8 Value, --> rdx
+; IN UINTN Length --> r8
+; );
+;------------------------------------------------------------------------------
+memset PROC USES rdi
+ mov rax, rcx
+ cmp r8, 0 ; if Size == 0, do nothing
+ je @SetDone
+ mov rax, rdx ; rdx <-> r8
+ mov rdx, r8 ; rdx <- Length
+ mov r8, rax ; r8 <- Value
+ mov ah, al
+ DB 48h, 0fh, 6eh, 0c0h ; movd mm0, rax
+ mov r8, rcx
+ mov rdi, r8 ; rdi <- Buffer
+ mov rcx, rdx
+ and edx, 7
+ shr rcx, 3
+ jz @SetBytes
+ DB 0fh, 70h, 0C0h, 00h ; pshufw mm0, mm0, 0h
+@@:
+ DB 48h, 0fh, 7eh, 07h ; movd [rdi], mm0
+ add rdi, 8
+ loop @B
+@SetBytes:
+ mov ecx, edx
+ rep stosb
+ mov rax, r8
+@SetDone:
+ ret
+memset ENDP
+
+ END
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