diff options
Diffstat (limited to 'MdePkg/Library')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibMmx/BaseMemoryLibMmx.inf | 2 | ||||
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibMmx/X64/ZeroMem.nasm | 56 |
2 files changed, 58 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibMmx/BaseMemoryLibMmx.inf b/MdePkg/Library/BaseMemoryLibMmx/BaseMemoryLibMmx.inf index 3222ef89a8..fee9cae168 100644 --- a/MdePkg/Library/BaseMemoryLibMmx/BaseMemoryLibMmx.inf +++ b/MdePkg/Library/BaseMemoryLibMmx/BaseMemoryLibMmx.inf @@ -96,6 +96,7 @@ Ia32/CopyMem.asm
[Sources.X64]
+ X64/ZeroMem.nasm
X64/ZeroMem.asm
X64/ScanMem64.asm
X64/ScanMem32.asm
@@ -115,6 +116,7 @@ X64/SetMem64.S
X64/SetMem32.S
X64/SetMem16.S
+ X64/ZeroMem.nasm
X64/ZeroMem.S
X64/SetMem.S
X64/CopyMem.S
diff --git a/MdePkg/Library/BaseMemoryLibMmx/X64/ZeroMem.nasm b/MdePkg/Library/BaseMemoryLibMmx/X64/ZeroMem.nasm new file mode 100644 index 0000000000..019b31fa28 --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibMmx/X64/ZeroMem.nasm @@ -0,0 +1,56 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, 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:
+;
+; ZeroMem.nasm
+;
+; Abstract:
+;
+; ZeroMem function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ DEFAULT REL
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID *
+; InternalMemZeroMem (
+; IN VOID *Buffer,
+; IN UINTN Count
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMemZeroMem)
+ASM_PFX(InternalMemZeroMem):
+ push rdi
+ mov rdi, rcx
+ mov rcx, rdx
+ mov r8, rdi
+ and edx, 7
+ shr rcx, 3
+ jz @ZeroBytes
+ DB 0xf, 0xef, 0xc0 ; pxor mm0, mm0
+.0:
+ DB 0xf, 0xe7, 7 ; movntq [rdi], mm0
+ add rdi, 8
+ loop .0
+ DB 0xf, 0xae, 0xf0 ; mfence
+@ZeroBytes:
+ xor eax, eax
+ mov ecx, edx
+ rep stosb
+ mov rax, r8
+ pop rdi
+ ret
+
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