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clean up all of eight BaseMemoryLib instances in MdePkg with the following updates:

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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
This commit is contained in:
qhuang8
2009-08-11 15:32:16 +00:00
parent ba19956ac3
commit 1fef058f4b
162 changed files with 1087 additions and 1252 deletions
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47
MdePkg/Library/BaseMemoryLibMmx/X64/CopyMem.S
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@@ -3,7 +3,7 @@
#
#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2008, Intel Corporation
# Copyright (c) 2006 - 2009, 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
@@ -34,42 +34,41 @@
# IN UINTN Count
# )
#------------------------------------------------------------------------------
.intel_syntax noprefix
ASM_GLOBAL 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
pushq %rsi
pushq %rdi
movq %rdx, %rsi # rsi <- Source
movq %rcx, %rdi # rdi <- Destination
leaq -1(%rsi, %r8,), %r9 # r9 <- End of Source
cmpq %rdi, %rsi
movq %rdi, %rax # rax <- Destination as return value
jae L0
cmp r9, rdi
cmpq %rdi, %r9
jae L_CopyBackward # Copy backward if overlapped
L0:
mov rcx, r8
and r8, 7
shr rcx, 3 # rcx <- # of Qwords to copy
movq %r8, %rcx
andq $7, %r8
shrq $3, %rcx # rcx <- # of Qwords to copy
jz L_CopyBytes
movd r10, mm0 # (Save mm0 in r10)
movq %mm0, %r10 # (Save mm0 in r10) ; Why just save 32 bits?
L1:
movq mm0, [rsi]
movntq [rdi], mm0
add rsi, 8
add rdi, 8
movq (%rsi), %mm0
movntq %mm0, (%rdi)
addq $8, %rsi
addq $8, %rdi
loop L1
mfence
movd mm0, r10 # (Restore mm0)
movd %r10, %mm0 # (Restore mm0)
jmp L_CopyBytes
L_CopyBackward:
mov rsi, r9 # rsi <- End of Source
lea rdi, [rdi + r8 - 1] # rdi <- End of Destination
movq %r9, %rsi # rsi <- End of Source
leaq -1(%rdi, %r8,), %rdi # rdi <- End of Destination
std # set direction flag
L_CopyBytes:
mov rcx, r8
movq %r8, %rcx
rep movsb # Copy bytes backward
cld
pop rdi
pop rsi
popq %rdi
popq %rsi
ret