diff options
Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/X64/ScanMem8.asm')
| -rw-r--r-- | EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/X64/ScanMem8.asm | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/X64/ScanMem8.asm b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/X64/ScanMem8.asm new file mode 100644 index 0000000..dff52e5 --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/X64/ScanMem8.asm @@ -0,0 +1,51 @@ +;------------------------------------------------------------------------------ +; +; 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: +; +; ScanMem8.Asm +; +; Abstract: +; +; ScanMem8 function +; +; Notes: +; +; The following BaseMemoryLib instances share the same version of this file: +; +; BaseMemoryLibRepStr +; BaseMemoryLibMmx +; BaseMemoryLibSse2 +; +;------------------------------------------------------------------------------ + + .code + +;------------------------------------------------------------------------------ +; CONST VOID * +; EFIAPI +; InternalMemScanMem8 ( +; IN CONST VOID *Buffer, +; IN UINTN Length, +; IN UINT8 Value +; ); +;------------------------------------------------------------------------------ +InternalMemScanMem8 PROC USES rdi + mov rdi, rcx + mov rcx, rdx + mov rax, r8 + repne scasb + lea rax, [rdi - 1] + cmovnz rax, rcx ; set rax to 0 if not found + ret +InternalMemScanMem8 ENDP + + END |