diff options
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibSse2/Ia32/CompareMem.S')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/Ia32/CompareMem.S | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/Ia32/CompareMem.S b/MdePkg/Library/BaseMemoryLibSse2/Ia32/CompareMem.S new file mode 100644 index 0000000000..c01b0c1358 --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibSse2/Ia32/CompareMem.S @@ -0,0 +1,48 @@ +#------------------------------------------------------------------------------ +# +# 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.Asm +# +# Abstract: +# +# CompareMem function +# +# Notes: +# +# The following BaseMemoryLib instances share the same version of this file: +# +# BaseMemoryLibRepStr +# BaseMemoryLibMmx +# BaseMemoryLibSse2 +# +#------------------------------------------------------------------------------ + + .686: + #.MODEL flat,C + .code: + +.global _InternalMemCompareMem +_InternalMemCompareMem: + push %esi + push %edi + movl 12(%esp), %esi + movl 16(%esp), %edi + movl 20(%esp), %ecx + repe cmpsb + movzbl -1(%esi), %eax + movzbl -1(%edi), %edx + subl %edx, %eax + subl %edx, %eax + pop %edi + pop %esi + ret |