diff options
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibSse2')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf | 2 | ||||
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/Ia32/SetMem.nasm | 73 |
2 files changed, 75 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf b/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf index d37bba2..89056bd 100644 --- a/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf +++ b/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf @@ -63,6 +63,7 @@ Ia32/SetMem32.S
Ia32/SetMem16.nasm
Ia32/SetMem16.S
+ Ia32/SetMem.nasm
Ia32/SetMem.S
Ia32/CopyMem.S
Ia32/ScanMem64.nasm
@@ -83,6 +84,7 @@ Ia32/SetMem32.asm
Ia32/SetMem16.nasm
Ia32/SetMem16.asm
+ Ia32/SetMem.nasm
Ia32/SetMem.asm
Ia32/CopyMem.asm
diff --git a/MdePkg/Library/BaseMemoryLibSse2/Ia32/SetMem.nasm b/MdePkg/Library/BaseMemoryLibSse2/Ia32/SetMem.nasm new file mode 100644 index 0000000..f3d157c --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibSse2/Ia32/SetMem.nasm @@ -0,0 +1,73 @@ +;------------------------------------------------------------------------------
+;
+; 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:
+;
+; SetMem.nasm
+;
+; Abstract:
+;
+; SetMem function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID *
+; EFIAPI
+; InternalMemSetMem (
+; IN VOID *Buffer,
+; IN UINTN Count,
+; IN UINT8 Value
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMemSetMem)
+ASM_PFX(InternalMemSetMem):
+ push edi
+ mov edx, [esp + 12] ; edx <- Count
+ mov edi, [esp + 8] ; edi <- Buffer
+ mov al, [esp + 16] ; al <- Value
+ xor ecx, ecx
+ sub ecx, edi
+ and ecx, 15 ; ecx + edi aligns on 16-byte boundary
+ jz .0
+ cmp ecx, edx
+ cmova ecx, edx
+ sub edx, ecx
+ rep stosb
+.0:
+ mov ecx, edx
+ and edx, 15
+ shr ecx, 4 ; ecx <- # of DQwords to set
+ jz @SetBytes
+ mov ah, al ; ax <- Value | (Value << 8)
+ add esp, -16
+ movdqu [esp], xmm0 ; save xmm0
+ movd xmm0, eax
+ pshuflw xmm0, xmm0, 0 ; xmm0[0..63] <- Value repeats 8 times
+ movlhps xmm0, xmm0 ; xmm0 <- Value repeats 16 times
+.1:
+ movntdq [edi], xmm0 ; edi should be 16-byte aligned
+ add edi, 16
+ loop .1
+ mfence
+ movdqu xmm0, [esp] ; restore xmm0
+ add esp, 16 ; stack cleanup
+@SetBytes:
+ mov ecx, edx
+ rep stosb
+ mov eax, [esp + 8] ; eax <- Buffer as return value
+ pop edi
+ ret
+
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