| #------------------------------------------------------------------------------ | |
| # | |
| # Copyright (c) 2006 - 2008, 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: | |
| # | |
| # ZeroMem.asm | |
| # | |
| # Abstract: | |
| # | |
| # ZeroMem function | |
| # | |
| # Notes: | |
| # | |
| #------------------------------------------------------------------------------ | |
| ASM_GLOBAL ASM_PFX(InternalMemZeroMem) | |
| #------------------------------------------------------------------------------ | |
| # VOID * | |
| # EFIAPI | |
| # InternalMemZeroMem ( | |
| # IN VOID *Buffer, | |
| # IN UINTN Count | |
| # ); | |
| #------------------------------------------------------------------------------ | |
| ASM_PFX(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 |