1 files changed, 65 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S b/Core/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S
new file mode 100644
index 0000000000..3b00ce7309
--- /dev/null
+++ b/Core/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S
@@ -0,0 +1,65 @@
+#
+# ConvertAsm.py: Automatically generated from ZeroMem.asm
+#
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006 - 2009, 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:
+#
+#   ZeroMem.S
+#
+# Abstract:
+#
+#   ZeroMem function
+#
+# Notes:
+#
+#------------------------------------------------------------------------------
+
+
+#------------------------------------------------------------------------------
+#  VOID *
+#  InternalMemZeroMem (
+#    IN VOID   *Buffer,
+#    IN UINTN  Count
+#    );
+#------------------------------------------------------------------------------
+ASM_GLOBAL ASM_PFX(InternalMemZeroMem)
+ASM_PFX(InternalMemZeroMem):
+    pushq   %rdi
+    movq    %rcx, %rdi
+    xorq    %rcx, %rcx
+    xorl    %eax, %eax
+    subq    %rdi, %rcx
+    andq    $15, %rcx
+    movq    %rdi, %r8
+    jz      L0
+    cmpq    %rdx, %rcx
+    cmova   %rdx, %rcx
+    subq    %rcx, %rdx
+    rep     stosb
+L0:
+    movq    %rdx, %rcx
+    andl    $15, %edx
+    shrq    $4, %rcx
+    jz      L_ZeroBytes
+    pxor    %xmm0, %xmm0
+L1:
+    movntdq %xmm0, (%rdi)                 # rdi should be 16-byte aligned
+    addq    $16, %rdi
+    loop    L1
+    mfence
+L_ZeroBytes:
+    movl    %edx, %ecx
+    rep     stosb
+    movq    %r8, %rax
+    popq    %rdi
+    ret