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-rw-r--r--MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S65
1 files changed, 65 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S b/MdePkg/Library/BaseMemoryLibSse2/X64/ZeroMem.S
new file mode 100644
index 000000000000..7cf7a267d174
--- /dev/null
+++ b/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