diff options
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S b/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S new file mode 100644 index 000000000000..7cf7a267d174 --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S @@ -0,0 +1,65 @@ +# +# ConvertAsm.py: Automatically generated from ZeroMem.asm +# +#------------------------------------------------------------------------------ +# +# Copyright (c) 2006 - 2009, 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.S +# +# Abstract: +# +# ZeroMem function +# +# Notes: +# +#------------------------------------------------------------------------------ + + +#------------------------------------------------------------------------------ +# VOID * +# InternalMemZeroMem ( +# IN VOID *Buffer, +# IN UINTN Count +# ); +#------------------------------------------------------------------------------ +ASM_GLOBAL ASM_PFX(InternalMemZeroMem) +ASM_PFX(InternalMemZeroMem): + pushq %rdi + movq %rcx, %rdi + xorq %rcx, %rcx + xorl %eax, %eax + subq %rdi, %rcx + andq $15, %rcx + movq %rdi, %r8 + jz L0 + cmpq %rdx, %rcx + cmova %rdx, %rcx + subq %rcx, %rdx + rep stosb +L0: + movq %rdx, %rcx + andl $15, %edx + shrq $4, %rcx + jz L_ZeroBytes + pxor %xmm0, %xmm0 +L1: + movntdq %xmm0, (%rdi) # rdi should be 16-byte aligned + addq $16, %rdi + loop L1 + mfence +L_ZeroBytes: + movl %edx, %ecx + rep stosb + movq %r8, %rax + popq %rdi + ret |