diff options
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibRepStr/x64/CompareMem.S')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibRepStr/x64/CompareMem.S | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibRepStr/x64/CompareMem.S b/MdePkg/Library/BaseMemoryLibRepStr/x64/CompareMem.S new file mode 100644 index 0000000000..1498a5d9ae --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibRepStr/x64/CompareMem.S @@ -0,0 +1,58 @@ +# +# ConvertAsm.py: Automatically generated from CompareMem.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: +# +# CompareMem.S +# +# Abstract: +# +# CompareMem function +# +# Notes: +# +# The following BaseMemoryLib instances share the same version of this file: +# +# BaseMemoryLibRepStr +# BaseMemoryLibMmx +# BaseMemoryLibSse2 +# +#------------------------------------------------------------------------------ + + +#------------------------------------------------------------------------------ +# INTN +# EFIAPI +# InternalMemCompareMem ( +# IN CONST VOID *DestinationBuffer, +# IN CONST VOID *SourceBuffer, +# IN UINTN Length +# ); +#------------------------------------------------------------------------------ +.intel_syntax +.globl _InternalMemCompareMem +_InternalMemCompareMem: + push rsi + push rdi + mov rsi, rcx + mov rdi, rdx + mov rcx, r8 + repe cmpsb + movzx rax, byte ptr [rsi - 1] + movzx rdx, byte ptr [rdi - 1] + sub rax, rdx + pop rdi + pop rsi + ret + |