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

[mirror_edk2.git] / OldMdePkg / Library / BaseMemoryLibSse2 / x64 / SetMem64.asm

diff --git a/OldMdePkg/Library/BaseMemoryLibSse2/x64/SetMem64.asm b/OldMdePkg/Library/BaseMemoryLibSse2/x64/SetMem64.asm
new file mode 100644 (file)
index 0000000..a26b941
--- /dev/null
+++ b/OldMdePkg/Library/BaseMemoryLibSse2/x64/SetMem64.asm
@@ -0,0 +1,59 @@
+;------------------------------------------------------------------------------\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
+;   SetMem64.asm\r
+;\r
+; Abstract:\r
+;\r
+;   SetMem64 function\r
+;\r
+; Notes:\r
+;\r
+;------------------------------------------------------------------------------\r
+\r
+    .code\r
+\r
+;------------------------------------------------------------------------------\r
+;  VOID *\r
+;  InternalMemSetMem64 (\r
+;    IN VOID   *Buffer,\r
+;    IN UINTN  Count,\r
+;    IN UINT64 Value\r
+;    )\r
+;------------------------------------------------------------------------------\r
+InternalMemSetMem64 PROC\r
+    mov     rax, rcx                    ; rax <- Buffer\r
+    xchg    rcx, rdx                    ; rcx <- Count & rdx <- Buffer\r
+    test    dl, 8\r
+    movd    xmm0, r8\r
+    jz      @F\r
+    mov     [rdx], r8\r
+    add     rdx, 8\r
+    dec     rcx\r
+@@:\r
+    shr     rcx, 1\r
+    jz      @SetQwords\r
+    movlhps xmm0, xmm0\r
+@@:\r
+    movntdq [rdx], xmm0\r
+    lea     rdx, [rdx + 16]\r
+    loop    @B\r
+    mfence\r
+@SetQwords:\r
+    jnc     @F\r
+    mov     [rdx], r8\r
+@@:\r
+    ret\r
+InternalMemSetMem64 ENDP\r
+\r
+    END\r