-#------------------------------------------------------------------------------
-#
-# 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.asm
-#
-# Abstract:
-#
-# CopyMem function
-#
-# Notes:
-#
-#------------------------------------------------------------------------------
-
-
-#------------------------------------------------------------------------------
-# VOID *
-# EFIAPI
-# InternalMemCopyMem (
-# OUT VOID *DestinationBuffer,
-# IN CONST VOID *SourceBuffer,
-# IN UINTN Length
-# );
-#------------------------------------------------------------------------------
-.global _InternalMemCopyMem;
-_InternalMemCopyMem:
- push %rsi
- push %rdi
- mov %rdi, %rsi
- mov %rcx, %rdi
- lea -1(%r8,%rsi,1),%r9
- cmp %rdi, %rsi
- mov %rdi, %rax
- jae L1
- cmp %rdi, %r9
- jae LCopyBackward # Copy backward if overlapped
-L1:
- mov %r8, %rcx
- and $7, %r8
- shr $3, %rcx
- jz LCopyBytes
- movd %mm0, %r10 # (Save mm0 in r10)
-L2:
- movd (%rsi), %mm0
- movntq %mm0, (%rdi)
- add $8, %rsi
- add $8, %rdi
- loop L2
- mfence
- movd %r10, %mm0 #(Restore mm0)
- jmp LCopyBytes
-LCopyBackward:
- mov %r9, %rsi
- lea -1(%r8,%rdi,1),%rdi
- std # set direction flag
-LCopyBytes:
- mov %r8, %rcx
- 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 - 2009, 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
+# CopyMem.S\r
+#\r
+# Abstract:\r
+#\r
+# CopyMem function\r
+#\r
+# Notes:\r
+#\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 <- End of Source \r
+ cmpq %rdi, %rsi \r
+ movq %rdi, %rax # rax <- Destination as return value\r
+ jae L0\r
+ cmpq %rdi, %r9\r
+ jae L_CopyBackward # Copy backward if overlapped\r
+L0:\r
+ movq %r8, %rcx \r
+ andq $7, %r8\r
+ shrq $3, %rcx # rcx <- # of Qwords to copy\r
+ jz L_CopyBytes\r
+ movq %mm0, %r10 # (Save mm0 in r10) ; Why just save 32 bits?\r
+L1:\r
+ movq (%rsi), %mm0\r
+ movntq %mm0, (%rdi)\r
+ addq $8, %rsi \r
+ addq $8, %rdi\r
+ loop L1\r
+ mfence\r
+ movd %r10, %mm0 # (Restore mm0)\r
+ jmp L_CopyBytes\r
+L_CopyBackward:\r
+ movq %r9, %rsi # rsi <- End of Source\r
+ leaq -1(%rdi, %r8,), %rdi # rdi <- End of Destination\r
+ std # set direction flag\r
+L_CopyBytes:\r
+ movq %r8, %rcx \r
+ rep movsb # Copy bytes backward\r
+ cld\r
+ popq %rdi\r
+ popq %rsi\r
+ ret\r