diff options
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibSse2/Ia32/ZeroMem.S')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/Ia32/ZeroMem.S | 135 |
1 files changed, 65 insertions, 70 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/Ia32/ZeroMem.S b/MdePkg/Library/BaseMemoryLibSse2/Ia32/ZeroMem.S index 657584d4df..8b4157f741 100644 --- a/MdePkg/Library/BaseMemoryLibSse2/Ia32/ZeroMem.S +++ b/MdePkg/Library/BaseMemoryLibSse2/Ia32/ZeroMem.S @@ -1,70 +1,65 @@ -//
-// Include common header file for this module.
-//
-#include "CommonHeader.h"
-
-#------------------------------------------------------------------------------
-#
-# Copyright (c) 2006, Intel Corporation
-# All rights reserved. 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.asm
-#
-# Abstract:
-#
-# ZeroMem function
-#
-# Notes:
-#
-#------------------------------------------------------------------------------
-
-.globl _InternalMemZeroMem
-
-#------------------------------------------------------------------------------
-# VOID *
-# EFIAPI
-# InternalMemZeroMem (
-# IN VOID *Buffer,
-# IN UINTN Count
-# );
-#------------------------------------------------------------------------------
-_InternalMemZeroMem:
- push %edi
- movl 8(%esp), %edi
- movl 12(%esp), %edx
- xorl %ecx, %ecx
- subl %edi, %ecx
- xorl %eax, %eax
- andl $15, %ecx
- jz L0
- cmpl %edx, %ecx
- cmova %edx, %ecx
- subl %ecx, %edx
- rep
- stosb
-L0:
- movl %edx, %ecx
- andl $15, %edx
- shrl $4, %ecx
- jz L_ZeroBytes
- pxor %xmm0, %xmm0
-L1:
- movntdq %xmm0, (%edi)
- addl $16, %edi
- loop L1
- mfence
-L_ZeroBytes:
- movl %edx, %ecx
- rep
- stosb
- movl 8(%esp), %eax
- pop %edi
- ret
+#------------------------------------------------------------------------------ +# +# Copyright (c) 2006, Intel Corporation +# All rights reserved. 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.asm +# +# Abstract: +# +# ZeroMem function +# +# Notes: +# +#------------------------------------------------------------------------------ + +.globl _InternalMemZeroMem + +#------------------------------------------------------------------------------ +# VOID * +# EFIAPI +# InternalMemZeroMem ( +# IN VOID *Buffer, +# IN UINTN Count +# ); +#------------------------------------------------------------------------------ +_InternalMemZeroMem: + push %edi + movl 8(%esp), %edi + movl 12(%esp), %edx + xorl %ecx, %ecx + subl %edi, %ecx + xorl %eax, %eax + andl $15, %ecx + jz L0 + cmpl %edx, %ecx + cmova %edx, %ecx + subl %ecx, %edx + rep + stosb +L0: + movl %edx, %ecx + andl $15, %edx + shrl $4, %ecx + jz L_ZeroBytes + pxor %xmm0, %xmm0 +L1: + movntdq %xmm0, (%edi) + addl $16, %edi + loop L1 + mfence +L_ZeroBytes: + movl %edx, %ecx + rep + stosb + movl 8(%esp), %eax + pop %edi + ret |