MdePkg: Clean up source files

[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibOptDxe / X64 / CopyMem.S

diff --git a/MdePkg/Library/BaseMemoryLibOptDxe/X64/CopyMem.S b/MdePkg/Library/BaseMemoryLibOptDxe/X64/CopyMem.S
index 426a602286a17245e69d9f7d2eb2205ee92558ee..d6fc9cb860ce91bdfcf4d47c8ec1f92f401a5a83 100644 (file)
--- a/MdePkg/Library/BaseMemoryLibOptDxe/X64/CopyMem.S
+++ b/MdePkg/Library/BaseMemoryLibOptDxe/X64/CopyMem.S
@@ -1,75 +1,82 @@
-#
-# ConvertAsm.py: Automatically generated from CopyMem.asm
-#
-#------------------------------------------------------------------------------
-#
-# Copyright (c) 2006, 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:
-#
-#   CopyMem.S
-#
-# Abstract:
-#
-#   CopyMem function
-#
-# Notes:
-#
-#------------------------------------------------------------------------------
-
-
-#------------------------------------------------------------------------------
-#  VOID *
-#  EFIAPI
-#  InternalMemCopyMem (
-#    IN VOID   *Destination,
-#    IN VOID   *Source,
-#    IN UINTN  Count
-#    )
-#------------------------------------------------------------------------------
-.intel_syntax noprefix
-.globl ASM_PFX(InternalMemCopyMem)
-ASM_PFX(InternalMemCopyMem):
-    push    rsi
-    push    rdi
-    mov     rsi, rdx                    # rsi <- Source
-    mov     rdi, rcx                    # rdi <- Destination
-    lea     r9, [rsi + r8 - 1]          # r9 <- End of Source
-    cmp     rsi, rdi
-    mov     rax, rdi                    # rax <- Destination as return value
-    jae     L0
-    cmp     r9, rdi
-    jae     L_CopyBackward              # Copy backward if overlapped
-L0:
-    mov     rcx, r8
-    and     r8, 7
-    shr     rcx, 3                      # rcx <- # of Qwords to copy
-    jz      L_CopyBytes
-    movd    r10, mm0                    # (Save mm0 in r10)
-L1:
-    movq    mm0, [rsi]
-    movntq  [rdi], mm0
-    add     rsi, 8
-    add     rdi, 8
-    loop    L1
-    mfence
-    movd    mm0, r10                    # (Restore mm0)
-    jmp     L_CopyBytes
-L_CopyBackward:
-    mov     rsi, r9                     # rsi <- End of Source
-    lea     rdi, [rdi + r8 - 1]         # rdi <- End of Destination
-    std                                 # set direction flag
-L_CopyBytes:
-    mov     rcx, r8
-    rep     movsb                       # Copy bytes backward
-    cld
-    pop     rdi
-    pop     rsi
-    ret
+#\r
+# ConvertAsm.py: Automatically generated from CopyMem.asm\r
+#\r
+#------------------------------------------------------------------------------\r
+#\r
+# Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
+# 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
+#   CopyMem.S\r
+#\r
+# Abstract:\r
+#\r
+#   CopyMem function\r
+#\r
+# Notes:\r
+#\r
+#------------------------------------------------------------------------------\r
+\r
+#------------------------------------------------------------------------------\r
+#  VOID *\r
+#  EFIAPI\r
+#  InternalMemCopyMem (\r
+#    IN VOID   *Destination,\r
+#    IN VOID   *Source,\r
+#    IN UINTN  Count\r
+#    )\r
+#------------------------------------------------------------------------------\r
+ASM_GLOBAL ASM_PFX(InternalMemCopyMem)\r
+ASM_PFX(InternalMemCopyMem):\r
+    pushq   %rsi\r
+    pushq   %rdi\r
+    movq    %rdx, %rsi                  # rsi <- Source\r
+    movq    %rcx, %rdi                  # rdi <- Destination\r
+    leaq    -1(%rsi,%r8,), %r9          # r9 <- Last byte of Source\r
+    cmpq    %rdi, %rsi\r
+    movq    %rdi, %rax                  # rax <- Destination as return value\r
+    jae     L0                          # Copy forward if Source > Destination\r
+    cmpq    %rdi, %r9                   # Overlapped?\r
+    jae     L_CopyBackward              # Copy backward if overlapped\r
+L0:\r
+    xorq    %rcx, %rcx\r
+    subq    %rdi, %rcx                  # rcx <- -rdi\r
+    andq    $15, %rcx                   # rcx + rsi should be 16 bytes aligned\r
+    jz      L1                          # skip if rcx == 0\r
+    cmpq    %r8, %rcx\r
+    cmova   %r8, %rcx\r
+    subq    %rcx, %r8\r
+    rep     movsb\r
+L1:\r
+    movq    %r8,  %rcx\r
+    andq    $15, %r8\r
+    shrq    $4, %rcx                    # rcx <- # of DQwords to copy\r
+    jz      L_CopyBytes\r
+    movdqu  %xmm0, 0x18(%rsp)           # save xmm0 on stack\r
+L2:\r
+    movdqu  (%rsi), %xmm0               # rsi may not be 16-byte aligned\r
+    movntdq %xmm0, (%rdi)               # rdi should be 16-byte aligned\r
+    addq    $16, %rsi\r
+    addq    $16, %rdi\r
+    loop    L2\r
+    mfence\r
+    movdqa  0x18(%rsp), %xmm0            # restore xmm0\r
+    jmp     L_CopyBytes                  # copy remaining bytes\r
+L_CopyBackward:\r
+    movq    %r9, %rsi                   # rsi <- Last byte of Source\r
+    leaq     -1(%rdi, %r8,), %rdi       # rdi <- Last byte of Destination\r
+    std\r
+L_CopyBytes:\r
+    movq    %r8, %rcx\r
+    rep     movsb\r
+    cld\r
+    popq    %rdi\r
+    popq    %rsi\r
+    ret\r