diff options
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S b/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S new file mode 100644 index 0000000000..2712579db8 --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S @@ -0,0 +1,66 @@ +# +# ConvertAsm.py: Automatically generated from ZeroMem.asm +# +#------------------------------------------------------------------------------ +# +# 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.S +# +# Abstract: +# +# ZeroMem function +# +# Notes: +# +#------------------------------------------------------------------------------ + + +#------------------------------------------------------------------------------ +# VOID * +# InternalMemZeroMem ( +# IN VOID *Buffer, +# IN UINTN Count +# ); +#------------------------------------------------------------------------------ +.intel_syntax noprefix +.globl ASM_PFX(InternalMemZeroMem) +ASM_PFX(InternalMemZeroMem): + push rdi + mov rdi, rcx + xor rcx, rcx + xor eax, eax + sub rcx, rdi + and rcx, 15 + mov r8, rdi + jz L0 + cmp rcx, rdx + cmova rcx, rdx + sub rdx, rcx + rep stosb +L0: + mov rcx, rdx + and edx, 15 + shr rcx, 4 + jz _ZeroBytes_L2 + pxor xmm0, xmm0 +L1: + movntdq [rdi], xmm0 # rdi should be 16-byte aligned + add rdi, 16 + loop L1 + mfence +_ZeroBytes_L2: + mov ecx, edx + rep stosb + mov rax, r8 + pop rdi + ret |