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https://github.com/checkpoint-restore/criu
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f233b86a02
This is the difference between two commits criu-dev/b0f6f293/Unify own memcpy/memset/memcmp master/0367a1fe/Drop prefix from own memcpy/memset/memcmp that makes criu-dev after rebase on master with latter commit be the same as it was with former commit before rebase. Signed-off-by: Kir Kolyshkin <kir@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com> Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
29 lines
518 B
ArmAsm
29 lines
518 B
ArmAsm
#include "common/asm/linkage.h"
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/* The following code is taken from Linux kernel (arch/x86/lib/memcpy_64.S).
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* There are 3 implementations in there, we use the one that relies on
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* X86_FEATURE_REP_GOOD ("rep microcode works well").
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*/
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/*
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* memcpy - Copy a memory block.
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*
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* Input:
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* rdi destination
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* rsi source
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* rdx count
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*
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* Output:
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* rax original destination
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*/
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ENTRY(memcpy)
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movq %rdi, %rax
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movq %rdx, %rcx
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shrq $3, %rcx
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andl $7, %edx
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rep movsq
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movl %edx, %ecx
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rep movsb
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ret
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END(memcpy)
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