Moved the MdePkg to OldMdePkg so that new code in MdePkg does not break existing...

[mirror_edk2.git] / OldMdePkg / Library / BaseMemoryLibMmx / X64 / ScanMem8.asm

diff --git a/OldMdePkg/Library/BaseMemoryLibMmx/X64/ScanMem8.asm b/OldMdePkg/Library/BaseMemoryLibMmx/X64/ScanMem8.asm
new file mode 100644 (file)
index 0000000..879273f
--- /dev/null
+++ b/OldMdePkg/Library/BaseMemoryLibMmx/X64/ScanMem8.asm
@@ -0,0 +1,51 @@
+;------------------------------------------------------------------------------\r
+;\r
+; Copyright (c) 2006, Intel Corporation\r
+; All rights reserved. This program and the accompanying materials\r
+; are licensed and made available under the terms and conditions of the BSD License\r
+; which accompanies this distribution.  The full text of the license may be found at\r
+; http://opensource.org/licenses/bsd-license.php\r
+;\r
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+;\r
+; Module Name:\r
+;\r
+;   ScanMem8.Asm\r
+;\r
+; Abstract:\r
+;\r
+;   ScanMem8 function\r
+;\r
+; Notes:\r
+;\r
+;   The following BaseMemoryLib instances share the same version of this file:\r
+;\r
+;       BaseMemoryLibRepStr\r
+;       BaseMemoryLibMmx\r
+;       BaseMemoryLibSse2\r
+;\r
+;------------------------------------------------------------------------------\r
+\r
+    .code\r
+\r
+;------------------------------------------------------------------------------\r
+; CONST VOID *\r
+; EFIAPI\r
+; InternalMemScanMem8 (\r
+;   IN      CONST VOID                *Buffer,\r
+;   IN      UINTN                     Length,\r
+;   IN      UINT8                     Value\r
+;   );\r
+;------------------------------------------------------------------------------\r
+InternalMemScanMem8 PROC    USES    rdi\r
+    mov     rdi, rcx\r
+    mov     rcx, rdx\r
+    mov     rax, r8\r
+    repne   scasb\r
+    lea     rax, [rdi - 1]\r
+    cmovnz  rax, rcx                    ; set rax to 0 if not found\r
+    ret\r
+InternalMemScanMem8 ENDP\r
+\r
+    END\r