From 7b3b4b2992bf89ee5f1aa3df2e2af9c988c49e69 Mon Sep 17 00:00:00 2001
From: mdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Sat, 6 Oct 2007 23:23:13 +0000
Subject: Add BaseMemoryLib optimized for PEI

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4035 6f19259b-4bc3-4df7-8a09-765794883524
---
 .../Library/BaseMemoryLibOptPei/x64/ScanMem32.asm  | 51 ++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 MdePkg/Library/BaseMemoryLibOptPei/x64/ScanMem32.asm

(limited to 'MdePkg/Library/BaseMemoryLibOptPei/x64/ScanMem32.asm')

diff --git a/MdePkg/Library/BaseMemoryLibOptPei/x64/ScanMem32.asm b/MdePkg/Library/BaseMemoryLibOptPei/x64/ScanMem32.asm
new file mode 100644
index 0000000000..e0523d8547
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibOptPei/x64/ScanMem32.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:
+;
+;   ScanMem32.Asm
+;
+; Abstract:
+;
+;   ScanMem32 function
+;
+; Notes:
+;
+;   The following BaseMemoryLib instances share the same version of this file:
+;
+;       BaseMemoryLibRepStr
+;       BaseMemoryLibMmx
+;       BaseMemoryLibSse2
+;
+;------------------------------------------------------------------------------
+
+    .code
+
+;------------------------------------------------------------------------------
+; CONST VOID *
+; EFIAPI
+; InternalMemScanMem32 (
+;   IN      CONST VOID                *Buffer,
+;   IN      UINTN                     Length,
+;   IN      UINT32                    Value
+;   );
+;------------------------------------------------------------------------------
+InternalMemScanMem32    PROC    USES    rdi
+    mov     rdi, rcx
+    mov     rax, r8
+    mov     rcx, rdx
+    repne   scasd
+    lea     rax, [rdi - 4]
+    cmovnz  rax, rcx
+    ret
+InternalMemScanMem32    ENDP
+
+    END
-- 
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