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add corresponding .S files for BaseMemoryLibXXX X64 arch. Note that we use ".intel_syntax noprefix" directive to simplify the .S implementation.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6184 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
eric_tian
2008-10-22 08:36:39 +00:00
parent 710a5b3584
commit 4df876adfb
36 changed files with 1362 additions and 139 deletions
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83
MdePkg/Library/BaseMemoryLibMmx/X64/CopyMem.S
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@@ -1,3 +1,6 @@
#
# ConvertAsm.py: Automatically generated from CopyMem.asm
#
#------------------------------------------------------------------------------
#
# Copyright (c) 2006, Intel Corporation
@@ -11,7 +14,7 @@
#
# Module Name:
#
# CopyMem.asm
# CopyMem.S
#
# Abstract:
#
@@ -23,50 +26,42 @@
#------------------------------------------------------------------------------
# VOID *
# EFIAPI
# InternalMemCopyMem (
# OUT VOID *DestinationBuffer,
# IN CONST VOID *SourceBuffer,
# IN UINTN Length
# );
# VOID *
# EFIAPI
# InternalMemCopyMem (
# IN VOID *Destination,
# IN VOID *Source,
# IN UINTN Count
# )
#------------------------------------------------------------------------------
.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
.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 _InternalMemCopyMem_al_0000
cmp r9, rdi
jae _atSym_CopyBackward # Copy backward if overlapped
_InternalMemCopyMem_al_0000:
mov rcx, r8
and r8, 7
shr rcx, 3
rep movsq # Copy as many Qwords as possible
jmp _atSym_CopyBytes
_atSym_CopyBackward:
mov rsi, r9 # rsi <- End of Source
lea rdi, [rdi + r8 - 1] # esi <- End of Destination
std # set direction flag
LCopyBytes:
mov %r8, %rcx
rep
movsb # Copy bytes backward
_atSym_CopyBytes:
mov rcx, r8
rep movsb # Copy bytes backward
cld
pop %rdi
pop %rsi
pop rdi
pop rsi
ret