1 files changed, 67 insertions, 0 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/x64/EfiSetMemSSE2.asm b/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/x64/EfiSetMemSSE2.asm
new file mode 100644
index 0000000000..8667d7e142
--- /dev/null
+++ b/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/x64/EfiSetMemSSE2.asm
@@ -0,0 +1,67 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2007, 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:
+;
+;   SetMem.asm
+;
+; Abstract:
+;
+;   SetMem function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    .code
+
+;------------------------------------------------------------------------------
+; VOID
+; EfiCommonLibSetMem (
+;   OUT     VOID                      *Buffer,
+;   IN      UINTN                     Size,
+;   IN      UINT8                     Value
+;   );
+;------------------------------------------------------------------------------
+EfiCommonLibSetMem   PROC    USES    rdi
+    cmp     rdx, 0                      ; if Size == 0, do nothing
+    je      @SetDone
+    mov     rdi, rcx                    ; rdi <- Buffer
+    mov     al, r8b                     ; al <- Value
+    xor     rcx, rcx
+    sub     rcx, rdi
+    and     rcx, 15                     ; rcx + rdi aligns on 16-byte boundary
+    jz      @F
+    cmp     rcx, rdx
+    cmova   rcx, rdx
+    sub     rdx, rcx
+    rep     stosb
+@@:
+    mov     rcx, rdx
+    and     rdx, 15
+    shr     rcx, 4
+    jz      @SetBytes
+    mov     ah, al                      ; ax <- Value repeats twice
+    movd    xmm0, eax                   ; xmm0[0..16] <- Value repeats twice
+    pshuflw xmm0, xmm0, 0               ; xmm0[0..63] <- Value repeats 8 times
+    movlhps xmm0, xmm0                  ; xmm0 <- Value repeats 16 times
+@@:
+    movdqa  [rdi], xmm0                 ; rdi should be 16-byte aligned
+    add     rdi, 16
+    loop    @B
+@SetBytes:
+    mov     ecx, edx                    ; high 32 bits of rcx are always zero
+    rep     stosb
+@SetDone:
+    ret
+EfiCommonLibSetMem   ENDP
+
+    END