1 files changed, 53 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseMemoryLibMmx/X64/SetMem32.asm b/Core/MdePkg/Library/BaseMemoryLibMmx/X64/SetMem32.asm
new file mode 100644
index 0000000000..a0bdd89bed
--- /dev/null
+++ b/Core/MdePkg/Library/BaseMemoryLibMmx/X64/SetMem32.asm
@@ -0,0 +1,53 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+; 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:
+;
+;   SetMem32.asm
+;
+; Abstract:
+;
+;   SetMem32 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    .code
+
+;------------------------------------------------------------------------------
+;  VOID *
+;  InternalMemSetMem32 (
+;    IN VOID   *Buffer,
+;    IN UINTN  Count,
+;    IN UINT32 Value
+;    )
+;------------------------------------------------------------------------------
+InternalMemSetMem32 PROC
+    DB      49h, 0fh, 6eh, 0c0h         ; movd mm0, r8 (Value)
+    mov     rax, rcx                    ; rax <- Buffer
+    xchg    rcx, rdx                    ; rcx <- Count  rdx <- Buffer
+    shr     rcx, 1                      ; rcx <- # of qwords to set
+    jz      @SetDwords
+    DB      0fh, 70h, 0C0h, 44h         ; pshufw mm0, mm0, 44h
+@@:
+    DB      0fh, 0e7h, 02h              ; movntq [rdx], mm0
+    lea     rdx, [rdx + 8]              ; use "lea" to avoid flag changes
+    loop    @B
+    mfence
+@SetDwords:
+    jnc     @F
+    DB      0fh, 7eh, 02h               ; movd [rdx], mm0
+@@:
+    ret
+InternalMemSetMem32 ENDP
+
+    END