1 files changed, 83 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/X64/CopyMem.S b/MdePkg/Library/BaseMemoryLibSse2/X64/CopyMem.S
new file mode 100644
index 0000000000000..bf26cd3844554
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibSse2/X64/CopyMem.S
@@ -0,0 +1,83 @@
+#
+# ConvertAsm.py: Automatically generated from CopyMem.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:
+#
+#   CopyMem.S
+#
+# Abstract:
+#
+#   CopyMem function
+#
+# Notes:
+#
+#------------------------------------------------------------------------------
+
+
+#------------------------------------------------------------------------------
+#  VOID *
+#  EFIAPI
+#  InternalMemCopyMem (
+#    IN VOID   *Destination,
+#    IN VOID   *Source,
+#    IN UINTN  Count
+#    )
+#------------------------------------------------------------------------------
+ASM_GLOBAL ASM_PFX(InternalMemCopyMem)
+ASM_PFX(InternalMemCopyMem):
+    pushq   %rsi
+    pushq   %rdi
+    movq    %rdx, %rsi                  # rsi <- Source
+    movq    %rcx, %rdi                  # rdi <- Destination
+    leaq    -1(%rsi, %r8,), %r9         # r9 <- Last byte of Source
+    cmpq    %rdi, %rsi
+    movq    %rdi, %rax                  # rax <- Destination as return value
+    jae     L0                          # Copy forward if Source > Destination
+    cmpq    %rdi, %r9                   # Overlapped?
+    jae     L_CopyBackward              # Copy backward if overlapped
+L0:            
+    xorq    %rcx, %rcx                    
+    subq    %rdi, %rcx                  # rcx <- -rdi
+    andq    $15, %rcx                   # rcx + rsi should be 16 bytes aligned
+    jz      L1                          # skip if rcx == 0
+    cmpq    %r8, %rcx
+    cmova   %r8, %rcx
+    subq    %rcx, %r8
+    rep     movsb
+L1:
+    movq    %r8, %rcx
+    andq    $15, %r8
+    shrq    $4, %rcx                    # rcx <- # of DQwords to copy
+    jz      L_CopyBytes
+    movdqa  %xmm0, 0x18(%rsp)           # save xmm0 on stack
+L2:
+    movdqu  (%rsi), %xmm0               # rsi may not be 16-byte aligned
+    movntdq  %xmm0, (%rdi)              # rdi should be 16-byte aligned
+    addq    $16, %rsi
+    addq    $16, %rdi
+    loop    L2
+    mfence
+    movdqa  0x18(%rsp), %xmm0           # restore xmm0
+    jmp     L_CopyBytes                 # copy remaining bytes
+L_CopyBackward:
+    movq    %r9, %rsi                   # rsi <- Last byte of Source
+    leaq    -1(%rdi, %r8,), %rdi        # rdi <- Last byte of Destination
+    std
+L_CopyBytes:
+    movq    %r8, %rcx
+    rep     movsb
+    cld
+    popq    %rdi
+    popq    %rsi
+    ret