diff options
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibSse2/X64/SetMem64.nasm')
-rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/X64/SetMem64.nasm | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem64.nasm b/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem64.nasm new file mode 100644 index 0000000000..e70df79e5b --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem64.nasm @@ -0,0 +1,59 @@ +;------------------------------------------------------------------------------
+;
+; 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:
+;
+; SetMem64.nasm
+;
+; Abstract:
+;
+; SetMem64 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ DEFAULT REL
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID *
+; InternalMemSetMem64 (
+; IN VOID *Buffer,
+; IN UINTN Count,
+; IN UINT64 Value
+; )
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMemSetMem64)
+ASM_PFX(InternalMemSetMem64):
+ mov rax, rcx ; rax <- Buffer
+ xchg rcx, rdx ; rcx <- Count & rdx <- Buffer
+ test dl, 8
+ movq xmm0, r8
+ jz .0
+ mov [rdx], r8
+ add rdx, 8
+ dec rcx
+.0:
+ shr rcx, 1
+ jz @SetQwords
+ movlhps xmm0, xmm0
+.1:
+ movntdq [rdx], xmm0
+ lea rdx, [rdx + 16]
+ loop .1
+ mfence
+@SetQwords:
+ jnc .2
+ mov [rdx], r8
+.2:
+ ret
+
|