1fef058f4b
1. Remove .intel_syntax directives in GCC assembly files. All these assembly files have been updated to use the preferred syntax for GAS 2. Correct the incorrect comments for internal worker functions for SetMemXX() and ScanMemXX(). The Length parameter is actually the counter of 16-bit, 32-bit or 64-bit value. 3. Simplify the logic in ZeroMemoryWrapper.c for BaseMemoryLibOptPei instance to remove the conditional statement for zero length. This logic is already covered by worker function InternalMemZeroMem(). 4. Cleanup all the Wrapper C files in BaseMemoryLib instances. They are supposed to be shared by all these 8 BaseMemoryLib instances, but are out-of-sync after some maintenance. This patch re-syncs them and makes them exactly the same. 5. Cleanup MemLibInternal.h so that it is shared by 6 BaseMemoryLib instance except for PeiMemoryLib and UefiMemoryLib. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9041 6f19259b-4bc3-4df7-8a09-765794883524
84 lines
2.8 KiB
ArmAsm
84 lines
2.8 KiB
ArmAsm
#
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# ConvertAsm.py: Automatically generated from CopyMem.asm
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#
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#------------------------------------------------------------------------------
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#
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# Copyright (c) 2006 - 2009, Intel Corporation
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# All rights reserved. This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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# Module Name:
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#
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# CopyMem.S
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#
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# Abstract:
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#
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# CopyMem function
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#
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# Notes:
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#
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#------------------------------------------------------------------------------
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#------------------------------------------------------------------------------
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# VOID *
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# EFIAPI
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# InternalMemCopyMem (
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# IN VOID *Destination,
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# IN VOID *Source,
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# IN UINTN Count
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# )
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(InternalMemCopyMem)
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ASM_PFX(InternalMemCopyMem):
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pushq %rsi
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pushq %rdi
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movq %rdx, %rsi # rsi <- Source
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movq %rcx, %rdi # rdi <- Destination
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leaq -1(%rsi, %r8,), %r9 # r9 <- Last byte of Source
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cmpq %rdi, %rsi
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movq %rdi, %rax # rax <- Destination as return value
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jae L0 # Copy forward if Source > Destination
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cmpq %rdi, %r9 # Overlapped?
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jae L_CopyBackward # Copy backward if overlapped
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L0:
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xorq %rcx, %rcx
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subq %rdi, %rcx # rcx <- -rdi
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andq $15, %rcx # rcx + rsi should be 16 bytes aligned
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jz L1 # skip if rcx == 0
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cmpq %r8, %rcx
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cmova %r8, %rcx
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subq %rcx, %r8
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rep movsb
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L1:
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movq %r8, %rcx
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andq $15, %r8
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shrq $4, %rcx # rcx <- # of DQwords to copy
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jz L_CopyBytes
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movdqa %xmm0, 0x18(%rsp) # save xmm0 on stack
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L2:
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movdqu (%rsi), %xmm0 # rsi may not be 16-byte aligned
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movntdq %xmm0, (%rdi) # rdi should be 16-byte aligned
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addq $16, %rsi
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addq $16, %rdi
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loop L2
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mfence
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movdqa 0x18(%rsp), %xmm0 # restore xmm0
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jmp L_CopyBytes # copy remaining bytes
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L_CopyBackward:
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movq %r9, %rsi # rsi <- Last byte of Source
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leaq -1(%rdi, %r8,), %rdi # rdi <- Last byte of Destination
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std
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L_CopyBytes:
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movq %r8, %rcx
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rep movsb
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cld
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popq %rdi
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popq %rsi
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ret
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