diff options
Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/X64/CompareMem.asm')
| -rw-r--r-- | EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/X64/CompareMem.asm | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/X64/CompareMem.asm b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/X64/CompareMem.asm new file mode 100644 index 0000000..d8e84e8 --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/X64/CompareMem.asm @@ -0,0 +1,52 @@ +;------------------------------------------------------------------------------ +; +; 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 +; +;------------------------------------------------------------------------------ + + .code + +;------------------------------------------------------------------------------ +; INTN +; EFIAPI +; InternalMemCompareMem ( +; IN CONST VOID *DestinationBuffer, +; IN CONST VOID *SourceBuffer, +; IN UINTN Length +; ); +;------------------------------------------------------------------------------ +InternalMemCompareMem PROC USES rsi 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 + ret +InternalMemCompareMem ENDP + + END |