diff options
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibSse2/X64/SetMem16.nasm')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/X64/SetMem16.nasm | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem16.nasm b/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem16.nasm new file mode 100644 index 0000000000..1f02582347 --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem16.nasm @@ -0,0 +1,69 @@ +;------------------------------------------------------------------------------
+;
+; 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:
+;
+; SetMem16.nasm
+;
+; Abstract:
+;
+; SetMem16 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ DEFAULT REL
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID *
+; InternalMemSetMem16 (
+; IN VOID *Buffer,
+; IN UINTN Count,
+; IN UINT16 Value
+; )
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMemSetMem16)
+ASM_PFX(InternalMemSetMem16):
+ push rdi
+ mov rdi, rcx
+ mov r9, rdi
+ xor rcx, rcx
+ sub rcx, rdi
+ and rcx, 15
+ mov rax, r8
+ jz .0
+ shr rcx, 1
+ cmp rcx, rdx
+ cmova rcx, rdx
+ sub rdx, rcx
+ rep stosw
+.0:
+ mov rcx, rdx
+ and edx, 7
+ shr rcx, 3
+ jz @SetWords
+ movd xmm0, eax
+ pshuflw xmm0, xmm0, 0
+ movlhps xmm0, xmm0
+.1:
+ movntdq [rdi], xmm0
+ add rdi, 16
+ loop .1
+ mfence
+@SetWords:
+ mov ecx, edx
+ rep stosw
+ mov rax, r9
+ pop rdi
+ ret
+
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