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|
/* memcpy with AVX
Copyright (C) 2014-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#if IS_IN (libc) \
&& (defined SHARED \
|| defined USE_AS_MEMMOVE \
|| !defined USE_MULTIARCH)
#include "asm-syntax.h"
#ifndef MEMCPY
# define MEMCPY __memcpy_avx_unaligned
# define MEMCPY_CHK __memcpy_chk_avx_unaligned
#endif
.section .text.avx,"ax",@progbits
#if !defined USE_AS_BCOPY
ENTRY (MEMCPY_CHK)
cmpq %rdx, %rcx
jb HIDDEN_JUMPTARGET (__chk_fail)
END (MEMCPY_CHK)
#endif
ENTRY (MEMCPY)
mov %rdi, %rax
#ifdef USE_AS_MEMPCPY
add %rdx, %rax
#endif
cmp $256, %rdx
jae L(256bytesormore)
cmp $16, %dl
jb L(less_16bytes)
cmp $128, %dl
jb L(less_128bytes)
vmovdqu (%rsi), %xmm0
lea (%rsi, %rdx), %rcx
vmovdqu 0x10(%rsi), %xmm1
vmovdqu 0x20(%rsi), %xmm2
vmovdqu 0x30(%rsi), %xmm3
vmovdqu 0x40(%rsi), %xmm4
vmovdqu 0x50(%rsi), %xmm5
vmovdqu 0x60(%rsi), %xmm6
vmovdqu 0x70(%rsi), %xmm7
vmovdqu -0x80(%rcx), %xmm8
vmovdqu -0x70(%rcx), %xmm9
vmovdqu -0x60(%rcx), %xmm10
vmovdqu -0x50(%rcx), %xmm11
vmovdqu -0x40(%rcx), %xmm12
vmovdqu -0x30(%rcx), %xmm13
vmovdqu -0x20(%rcx), %xmm14
vmovdqu -0x10(%rcx), %xmm15
lea (%rdi, %rdx), %rdx
vmovdqu %xmm0, (%rdi)
vmovdqu %xmm1, 0x10(%rdi)
vmovdqu %xmm2, 0x20(%rdi)
vmovdqu %xmm3, 0x30(%rdi)
vmovdqu %xmm4, 0x40(%rdi)
vmovdqu %xmm5, 0x50(%rdi)
vmovdqu %xmm6, 0x60(%rdi)
vmovdqu %xmm7, 0x70(%rdi)
vmovdqu %xmm8, -0x80(%rdx)
vmovdqu %xmm9, -0x70(%rdx)
vmovdqu %xmm10, -0x60(%rdx)
vmovdqu %xmm11, -0x50(%rdx)
vmovdqu %xmm12, -0x40(%rdx)
vmovdqu %xmm13, -0x30(%rdx)
vmovdqu %xmm14, -0x20(%rdx)
vmovdqu %xmm15, -0x10(%rdx)
ret
.p2align 4
L(less_128bytes):
cmp $64, %dl
jb L(less_64bytes)
vmovdqu (%rsi), %xmm0
lea (%rsi, %rdx), %rcx
vmovdqu 0x10(%rsi), %xmm1
vmovdqu 0x20(%rsi), %xmm2
lea (%rdi, %rdx), %rdx
vmovdqu 0x30(%rsi), %xmm3
vmovdqu -0x40(%rcx), %xmm4
vmovdqu -0x30(%rcx), %xmm5
vmovdqu -0x20(%rcx), %xmm6
vmovdqu -0x10(%rcx), %xmm7
vmovdqu %xmm0, (%rdi)
vmovdqu %xmm1, 0x10(%rdi)
vmovdqu %xmm2, 0x20(%rdi)
vmovdqu %xmm3, 0x30(%rdi)
vmovdqu %xmm4, -0x40(%rdx)
vmovdqu %xmm5, -0x30(%rdx)
vmovdqu %xmm6, -0x20(%rdx)
vmovdqu %xmm7, -0x10(%rdx)
ret
.p2align 4
L(less_64bytes):
cmp $32, %dl
jb L(less_32bytes)
vmovdqu (%rsi), %xmm0
vmovdqu 0x10(%rsi), %xmm1
vmovdqu -0x20(%rsi, %rdx), %xmm6
vmovdqu -0x10(%rsi, %rdx), %xmm7
vmovdqu %xmm0, (%rdi)
vmovdqu %xmm1, 0x10(%rdi)
vmovdqu %xmm6, -0x20(%rdi, %rdx)
vmovdqu %xmm7, -0x10(%rdi, %rdx)
ret
.p2align 4
L(less_32bytes):
vmovdqu (%rsi), %xmm0
vmovdqu -0x10(%rsi, %rdx), %xmm7
vmovdqu %xmm0, (%rdi)
vmovdqu %xmm7, -0x10(%rdi, %rdx)
ret
.p2align 4
L(less_16bytes):
cmp $8, %dl
jb L(less_8bytes)
movq -0x08(%rsi, %rdx), %rcx
movq (%rsi), %rsi
movq %rsi, (%rdi)
movq %rcx, -0x08(%rdi, %rdx)
ret
.p2align 4
L(less_8bytes):
cmp $4, %dl
jb L(less_4bytes)
mov -0x04(%rsi, %rdx), %ecx
mov (%rsi), %esi
mov %esi, (%rdi)
mov %ecx, -0x04(%rdi, %rdx)
ret
L(less_4bytes):
cmp $1, %dl
jbe L(less_2bytes)
mov -0x02(%rsi, %rdx), %cx
mov (%rsi), %si
mov %si, (%rdi)
mov %cx, -0x02(%rdi, %rdx)
ret
L(less_2bytes):
jb L(less_0bytes)
mov (%rsi), %cl
mov %cl, (%rdi)
L(less_0bytes):
ret
.p2align 4
L(256bytesormore):
#ifdef USE_AS_MEMMOVE
mov %rdi, %rcx
sub %rsi, %rcx
cmp %rdx, %rcx
jc L(copy_backward)
#endif
cmp $2048, %rdx
jae L(gobble_data_movsb)
mov %rax, %r8
lea (%rsi, %rdx), %rcx
mov %rdi, %r10
vmovdqu -0x80(%rcx), %xmm5
vmovdqu -0x70(%rcx), %xmm6
mov $0x80, %rax
and $-32, %rdi
add $32, %rdi
vmovdqu -0x60(%rcx), %xmm7
vmovdqu -0x50(%rcx), %xmm8
mov %rdi, %r11
sub %r10, %r11
vmovdqu -0x40(%rcx), %xmm9
vmovdqu -0x30(%rcx), %xmm10
sub %r11, %rdx
vmovdqu -0x20(%rcx), %xmm11
vmovdqu -0x10(%rcx), %xmm12
vmovdqu (%rsi), %ymm4
add %r11, %rsi
sub %eax, %edx
L(goble_128_loop):
vmovdqu (%rsi), %ymm0
vmovdqu 0x20(%rsi), %ymm1
vmovdqu 0x40(%rsi), %ymm2
vmovdqu 0x60(%rsi), %ymm3
add %rax, %rsi
vmovdqa %ymm0, (%rdi)
vmovdqa %ymm1, 0x20(%rdi)
vmovdqa %ymm2, 0x40(%rdi)
vmovdqa %ymm3, 0x60(%rdi)
add %rax, %rdi
sub %eax, %edx
jae L(goble_128_loop)
add %eax, %edx
add %rdi, %rdx
vmovdqu %ymm4, (%r10)
vzeroupper
vmovdqu %xmm5, -0x80(%rdx)
vmovdqu %xmm6, -0x70(%rdx)
vmovdqu %xmm7, -0x60(%rdx)
vmovdqu %xmm8, -0x50(%rdx)
vmovdqu %xmm9, -0x40(%rdx)
vmovdqu %xmm10, -0x30(%rdx)
vmovdqu %xmm11, -0x20(%rdx)
vmovdqu %xmm12, -0x10(%rdx)
mov %r8, %rax
ret
.p2align 4
L(gobble_data_movsb):
#ifdef SHARED_CACHE_SIZE_HALF
mov $SHARED_CACHE_SIZE_HALF, %rcx
#else
mov __x86_shared_cache_size_half(%rip), %rcx
#endif
shl $3, %rcx
cmp %rcx, %rdx
jae L(gobble_big_data_fwd)
mov %rdx, %rcx
mov %rdx, %rcx
rep movsb
ret
.p2align 4
L(gobble_big_data_fwd):
lea (%rsi, %rdx), %rcx
vmovdqu (%rsi), %ymm4
vmovdqu -0x80(%rsi,%rdx), %xmm5
vmovdqu -0x70(%rcx), %xmm6
vmovdqu -0x60(%rcx), %xmm7
vmovdqu -0x50(%rcx), %xmm8
vmovdqu -0x40(%rcx), %xmm9
vmovdqu -0x30(%rcx), %xmm10
vmovdqu -0x20(%rcx), %xmm11
vmovdqu -0x10(%rcx), %xmm12
mov %rdi, %r8
and $-32, %rdi
add $32, %rdi
mov %rdi, %r10
sub %r8, %r10
sub %r10, %rdx
add %r10, %rsi
lea (%rdi, %rdx), %rcx
add $-0x80, %rdx
L(gobble_mem_fwd_loop):
prefetchnta 0x1c0(%rsi)
prefetchnta 0x280(%rsi)
vmovdqu (%rsi), %ymm0
vmovdqu 0x20(%rsi), %ymm1
vmovdqu 0x40(%rsi), %ymm2
vmovdqu 0x60(%rsi), %ymm3
sub $-0x80, %rsi
vmovntdq %ymm0, (%rdi)
vmovntdq %ymm1, 0x20(%rdi)
vmovntdq %ymm2, 0x40(%rdi)
vmovntdq %ymm3, 0x60(%rdi)
sub $-0x80, %rdi
add $-0x80, %rdx
jb L(gobble_mem_fwd_loop)
sfence
vmovdqu %ymm4, (%r8)
vzeroupper
vmovdqu %xmm5, -0x80(%rcx)
vmovdqu %xmm6, -0x70(%rcx)
vmovdqu %xmm7, -0x60(%rcx)
vmovdqu %xmm8, -0x50(%rcx)
vmovdqu %xmm9, -0x40(%rcx)
vmovdqu %xmm10, -0x30(%rcx)
vmovdqu %xmm11, -0x20(%rcx)
vmovdqu %xmm12, -0x10(%rcx)
ret
#ifdef USE_AS_MEMMOVE
.p2align 4
L(copy_backward):
#ifdef SHARED_CACHE_SIZE_HALF
mov $SHARED_CACHE_SIZE_HALF, %rcx
#else
mov __x86_shared_cache_size_half(%rip), %rcx
#endif
shl $3, %rcx
vmovdqu (%rsi), %xmm5
vmovdqu 0x10(%rsi), %xmm6
add %rdx, %rdi
vmovdqu 0x20(%rsi), %xmm7
vmovdqu 0x30(%rsi), %xmm8
lea -0x20(%rdi), %r10
mov %rdi, %r11
vmovdqu 0x40(%rsi), %xmm9
vmovdqu 0x50(%rsi), %xmm10
and $0x1f, %r11
vmovdqu 0x60(%rsi), %xmm11
vmovdqu 0x70(%rsi), %xmm12
xor %r11, %rdi
add %rdx, %rsi
vmovdqu -0x20(%rsi), %ymm4
sub %r11, %rsi
sub %r11, %rdx
cmp %rcx, %rdx
ja L(gobble_big_data_bwd)
add $-0x80, %rdx
L(gobble_mem_bwd_llc):
vmovdqu -0x20(%rsi), %ymm0
vmovdqu -0x40(%rsi), %ymm1
vmovdqu -0x60(%rsi), %ymm2
vmovdqu -0x80(%rsi), %ymm3
lea -0x80(%rsi), %rsi
vmovdqa %ymm0, -0x20(%rdi)
vmovdqa %ymm1, -0x40(%rdi)
vmovdqa %ymm2, -0x60(%rdi)
vmovdqa %ymm3, -0x80(%rdi)
lea -0x80(%rdi), %rdi
add $-0x80, %rdx
jb L(gobble_mem_bwd_llc)
vmovdqu %ymm4, (%r10)
vzeroupper
vmovdqu %xmm5, (%rax)
vmovdqu %xmm6, 0x10(%rax)
vmovdqu %xmm7, 0x20(%rax)
vmovdqu %xmm8, 0x30(%rax)
vmovdqu %xmm9, 0x40(%rax)
vmovdqu %xmm10, 0x50(%rax)
vmovdqu %xmm11, 0x60(%rax)
vmovdqu %xmm12, 0x70(%rax)
ret
.p2align 4
L(gobble_big_data_bwd):
add $-0x80, %rdx
L(gobble_mem_bwd_loop):
prefetchnta -0x1c0(%rsi)
prefetchnta -0x280(%rsi)
vmovdqu -0x20(%rsi), %ymm0
vmovdqu -0x40(%rsi), %ymm1
vmovdqu -0x60(%rsi), %ymm2
vmovdqu -0x80(%rsi), %ymm3
lea -0x80(%rsi), %rsi
vmovntdq %ymm0, -0x20(%rdi)
vmovntdq %ymm1, -0x40(%rdi)
vmovntdq %ymm2, -0x60(%rdi)
vmovntdq %ymm3, -0x80(%rdi)
lea -0x80(%rdi), %rdi
add $-0x80, %rdx
jb L(gobble_mem_bwd_loop)
sfence
vmovdqu %ymm4, (%r10)
vzeroupper
vmovdqu %xmm5, (%rax)
vmovdqu %xmm6, 0x10(%rax)
vmovdqu %xmm7, 0x20(%rax)
vmovdqu %xmm8, 0x30(%rax)
vmovdqu %xmm9, 0x40(%rax)
vmovdqu %xmm10, 0x50(%rax)
vmovdqu %xmm11, 0x60(%rax)
vmovdqu %xmm12, 0x70(%rax)
ret
#endif
END (MEMCPY)
#endif
|
