diff options
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf | 2 | ||||
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibRepStr/X64/ScanMem64.nasm | 55 |
2 files changed, 57 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf b/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf index d7e60ffdf9..2451192f59 100644 --- a/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf +++ b/MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf @@ -92,6 +92,7 @@ Ia32/CopyMem.asm
[Sources.X64]
+ X64/ScanMem64.nasm
X64/ScanMem64.S
X64/ScanMem32.S
X64/ScanMem16.S
@@ -103,6 +104,7 @@ X64/SetMem16.S
X64/SetMem.S
X64/CopyMem.S
+ X64/ScanMem64.nasm
X64/ScanMem64.asm
X64/ScanMem32.asm
X64/ScanMem16.asm
diff --git a/MdePkg/Library/BaseMemoryLibRepStr/X64/ScanMem64.nasm b/MdePkg/Library/BaseMemoryLibRepStr/X64/ScanMem64.nasm new file mode 100644 index 0000000000..7efcf6a7bd --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibRepStr/X64/ScanMem64.nasm @@ -0,0 +1,55 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+; 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:
+;
+; ScanMem64.Asm
+;
+; Abstract:
+;
+; ScanMem64 function
+;
+; Notes:
+;
+; The following BaseMemoryLib instances contain the same copy of this file:
+;
+; BaseMemoryLibRepStr
+; BaseMemoryLibMmx
+; BaseMemoryLibSse2
+; BaseMemoryLibOptDxe
+; BaseMemoryLibOptPei
+;
+;------------------------------------------------------------------------------
+
+ DEFAULT REL
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; CONST VOID *
+; EFIAPI
+; InternalMemScanMem64 (
+; IN CONST VOID *Buffer,
+; IN UINTN Length,
+; IN UINT64 Value
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMemScanMem64)
+ASM_PFX(InternalMemScanMem64):
+ push rdi
+ mov rdi, rcx
+ mov rax, r8
+ mov rcx, rdx
+ repne scasq
+ lea rax, [rdi - 8]
+ cmovnz rax, rcx
+ pop rdi
+ ret
+
|