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author | mdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-10-06 23:23:49 +0000 |
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committer | mdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-10-06 23:23:49 +0000 |
commit | 631f060bb7fb457ff8720a690f4bdd378328cb2d (patch) | |
tree | 446b2d8859af0a266b57234778d06fde6b758d31 /MdePkg/Library/BaseMemoryLibOptDxe/x64/ScanMem8.asm | |
parent | 7b3b4b2992bf89ee5f1aa3df2e2af9c988c49e69 (diff) | |
download | edk2-platforms-631f060bb7fb457ff8720a690f4bdd378328cb2d.tar.xz |
Add BaseMemoryLib optimized for DXE
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4036 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibOptDxe/x64/ScanMem8.asm')
-rw-r--r-- | MdePkg/Library/BaseMemoryLibOptDxe/x64/ScanMem8.asm | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibOptDxe/x64/ScanMem8.asm b/MdePkg/Library/BaseMemoryLibOptDxe/x64/ScanMem8.asm new file mode 100644 index 0000000000..879273f960 --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibOptDxe/x64/ScanMem8.asm @@ -0,0 +1,51 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, 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:
+;
+; ScanMem8.Asm
+;
+; Abstract:
+;
+; ScanMem8 function
+;
+; Notes:
+;
+; The following BaseMemoryLib instances share the same version of this file:
+;
+; BaseMemoryLibRepStr
+; BaseMemoryLibMmx
+; BaseMemoryLibSse2
+;
+;------------------------------------------------------------------------------
+
+ .code
+
+;------------------------------------------------------------------------------
+; CONST VOID *
+; EFIAPI
+; InternalMemScanMem8 (
+; IN CONST VOID *Buffer,
+; IN UINTN Length,
+; IN UINT8 Value
+; );
+;------------------------------------------------------------------------------
+InternalMemScanMem8 PROC USES rdi
+ mov rdi, rcx
+ mov rcx, rdx
+ mov rax, r8
+ repne scasb
+ lea rax, [rdi - 1]
+ cmovnz rax, rcx ; set rax to 0 if not found
+ ret
+InternalMemScanMem8 ENDP
+
+ END
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