eb227e96bd
2. Optimized register usage in SetMemXX functions in all lib instances 3. Fixed a logical error in CopyMem for all lib instances git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1139 6f19259b-4bc3-4df7-8a09-765794883524
54 lines
1.7 KiB
NASM
54 lines
1.7 KiB
NASM
;------------------------------------------------------------------------------
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;
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; Copyright (c) 2006, Intel Corporation
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; All rights reserved. This program and the accompanying materials
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; are licensed and made available under the terms and conditions of the BSD License
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; which accompanies this distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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; Module Name:
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;
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; SetMem32.asm
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;
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; Abstract:
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;
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; SetMem32 function
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;
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; Notes:
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;
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;------------------------------------------------------------------------------
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.code
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;------------------------------------------------------------------------------
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; VOID *
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; InternalMemSetMem32 (
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; IN VOID *Buffer,
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; IN UINTN Count,
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; IN UINT32 Value
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; )
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;------------------------------------------------------------------------------
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InternalMemSetMem32 PROC
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DB 49h, 0fh, 6eh, 0c0h ; movd mm0, r8 (Value)
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mov rax, rcx ; rax <- Buffer
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xchg rcx, rdx ; rcx <- Count rdx <- Buffer
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shr rcx, 1 ; rcx <- # of qwords to set
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jz @SetDwords
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DB 0fh, 70h, 0C0h, 44h ; pshufw mm0, mm0, 44h
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@@:
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DB 0fh, 0e7h, 02h ; movntq [rdx], mm0
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lea rdx, [rdx + 8] ; use "lea" to avoid flag changes
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loop @B
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mfence
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@SetDwords:
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jnc @F
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DB 0fh, 7eh, 02h ; movd [rdx], mm0
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@@:
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ret
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InternalMemSetMem32 ENDP
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END
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