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

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

diff --git a/OldMdePkg/Library/BaseMemoryLibMmx/X64/SetMem.asm b/OldMdePkg/Library/BaseMemoryLibMmx/X64/SetMem.asm
new file mode 100644 (file)
index 0000000..923beef
--- /dev/null
+++ b/OldMdePkg/Library/BaseMemoryLibMmx/X64/SetMem.asm
@@ -0,0 +1,58 @@
+;------------------------------------------------------------------------------\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
+;   SetMem.asm\r
+;\r
+; Abstract:\r
+;\r
+;   SetMem function\r
+;\r
+; Notes:\r
+;\r
+;------------------------------------------------------------------------------\r
+\r
+    .code\r
+\r
+;------------------------------------------------------------------------------\r
+; VOID *\r
+; EFIAPI\r
+; InternalMemSetMem (\r
+;   OUT     VOID                      *Buffer,\r
+;   IN      UINTN                     Length,\r
+;   IN      UINT8                     Value\r
+;   );\r
+;------------------------------------------------------------------------------\r
+InternalMemSetMem   PROC    USES    rdi\r
+    mov     rax, r8\r
+    mov     ah, al\r
+    DB      48h, 0fh, 6eh, 0c0h         ; movd mm0, rax\r
+    mov     r8, rcx\r
+    mov     rdi, r8                     ; rdi <- Buffer\r
+    mov     rcx, rdx\r
+    and     edx, 7\r
+    shr     rcx, 3\r
+    jz      @SetBytes\r
+    DB      0fh, 70h, 0C0h, 00h         ; pshufw mm0, mm0, 0h\r
+@@:\r
+    DB      0fh, 0e7h, 07h              ; movntq [rdi], mm0\r
+    add     rdi, 8\r
+    loop    @B\r
+    mfence\r
+@SetBytes:\r
+    mov     ecx, edx\r
+    rep     stosb\r
+    mov     rax, r8\r
+    ret\r
+InternalMemSetMem   ENDP\r
+\r
+    END\r