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|
/* strcpy with AVX2
Copyright (C) 2011-2021 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
<https://www.gnu.org/licenses/>. */
#if IS_IN (libc)
# ifndef USE_AS_STRCAT
# include <sysdep.h>
# ifndef STRCPY
# define STRCPY __strcpy_avx2
# endif
# endif
/* Number of bytes in a vector register */
# ifndef VEC_SIZE
# define VEC_SIZE 32
# endif
# ifndef VZEROUPPER
# define VZEROUPPER vzeroupper
# endif
# ifndef SECTION
# define SECTION(p) p##.avx
# endif
/* zero register */
#define xmmZ xmm0
#define ymmZ ymm0
/* mask register */
#define ymmM ymm1
# ifndef USE_AS_STRCAT
.section SECTION(.text),"ax",@progbits
ENTRY (STRCPY)
# ifdef USE_AS_STRNCPY
mov %RDX_LP, %R8_LP
test %R8_LP, %R8_LP
jz L(ExitZero)
# endif
mov %rsi, %rcx
# ifndef USE_AS_STPCPY
mov %rdi, %rax /* save result */
# endif
# endif
vpxor %xmmZ, %xmmZ, %xmmZ
and $((VEC_SIZE * 4) - 1), %ecx
cmp $(VEC_SIZE * 2), %ecx
jbe L(SourceStringAlignmentLessTwoVecSize)
and $-VEC_SIZE, %rsi
and $(VEC_SIZE - 1), %ecx
vpcmpeqb (%rsi), %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
shr %cl, %rdx
# ifdef USE_AS_STRNCPY
# if defined USE_AS_STPCPY || defined USE_AS_STRCAT
mov $VEC_SIZE, %r10
sub %rcx, %r10
cmp %r10, %r8
# else
mov $(VEC_SIZE + 1), %r10
sub %rcx, %r10
cmp %r10, %r8
# endif
jbe L(CopyVecSizeTailCase2OrCase3)
# endif
test %edx, %edx
jnz L(CopyVecSizeTail)
vpcmpeqb VEC_SIZE(%rsi), %ymmZ, %ymm2
vpmovmskb %ymm2, %edx
# ifdef USE_AS_STRNCPY
add $VEC_SIZE, %r10
cmp %r10, %r8
jbe L(CopyTwoVecSizeCase2OrCase3)
# endif
test %edx, %edx
jnz L(CopyTwoVecSize)
vmovdqu (%rsi, %rcx), %ymm2 /* copy VEC_SIZE bytes */
vmovdqu %ymm2, (%rdi)
/* If source address alignment != destination address alignment */
.p2align 4
L(UnalignVecSizeBoth):
sub %rcx, %rdi
# ifdef USE_AS_STRNCPY
add %rcx, %r8
sbb %rcx, %rcx
or %rcx, %r8
# endif
mov $VEC_SIZE, %rcx
vmovdqa (%rsi, %rcx), %ymm2
vmovdqu %ymm2, (%rdi, %rcx)
vmovdqa VEC_SIZE(%rsi, %rcx), %ymm2
vpcmpeqb %ymm2, %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
add $VEC_SIZE, %rcx
# ifdef USE_AS_STRNCPY
sub $(VEC_SIZE * 3), %r8
jbe L(CopyVecSizeCase2OrCase3)
# endif
test %edx, %edx
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
jnz L(CopyVecSizeUnalignedVec2)
# else
jnz L(CopyVecSize)
# endif
vmovdqu %ymm2, (%rdi, %rcx)
vmovdqa VEC_SIZE(%rsi, %rcx), %ymm3
vpcmpeqb %ymm3, %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
add $VEC_SIZE, %rcx
# ifdef USE_AS_STRNCPY
sub $VEC_SIZE, %r8
jbe L(CopyVecSizeCase2OrCase3)
# endif
test %edx, %edx
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
jnz L(CopyVecSizeUnalignedVec3)
# else
jnz L(CopyVecSize)
# endif
vmovdqu %ymm3, (%rdi, %rcx)
vmovdqa VEC_SIZE(%rsi, %rcx), %ymm4
vpcmpeqb %ymm4, %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
add $VEC_SIZE, %rcx
# ifdef USE_AS_STRNCPY
sub $VEC_SIZE, %r8
jbe L(CopyVecSizeCase2OrCase3)
# endif
test %edx, %edx
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
jnz L(CopyVecSizeUnalignedVec4)
# else
jnz L(CopyVecSize)
# endif
vmovdqu %ymm4, (%rdi, %rcx)
vmovdqa VEC_SIZE(%rsi, %rcx), %ymm2
vpcmpeqb %ymm2, %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
add $VEC_SIZE, %rcx
# ifdef USE_AS_STRNCPY
sub $VEC_SIZE, %r8
jbe L(CopyVecSizeCase2OrCase3)
# endif
test %edx, %edx
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
jnz L(CopyVecSizeUnalignedVec2)
# else
jnz L(CopyVecSize)
# endif
vmovdqu %ymm2, (%rdi, %rcx)
vmovdqa VEC_SIZE(%rsi, %rcx), %ymm2
vpcmpeqb %ymm2, %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
add $VEC_SIZE, %rcx
# ifdef USE_AS_STRNCPY
sub $VEC_SIZE, %r8
jbe L(CopyVecSizeCase2OrCase3)
# endif
test %edx, %edx
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
jnz L(CopyVecSizeUnalignedVec2)
# else
jnz L(CopyVecSize)
# endif
vmovdqa VEC_SIZE(%rsi, %rcx), %ymm3
vmovdqu %ymm2, (%rdi, %rcx)
vpcmpeqb %ymm3, %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
add $VEC_SIZE, %rcx
# ifdef USE_AS_STRNCPY
sub $VEC_SIZE, %r8
jbe L(CopyVecSizeCase2OrCase3)
# endif
test %edx, %edx
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
jnz L(CopyVecSizeUnalignedVec3)
# else
jnz L(CopyVecSize)
# endif
vmovdqu %ymm3, (%rdi, %rcx)
mov %rsi, %rdx
lea VEC_SIZE(%rsi, %rcx), %rsi
and $-(VEC_SIZE * 4), %rsi
sub %rsi, %rdx
sub %rdx, %rdi
# ifdef USE_AS_STRNCPY
lea (VEC_SIZE * 8)(%r8, %rdx), %r8
# endif
L(UnalignedFourVecSizeLoop):
vmovdqa (%rsi), %ymm4
vmovdqa VEC_SIZE(%rsi), %ymm5
vmovdqa (VEC_SIZE * 2)(%rsi), %ymm6
vmovdqa (VEC_SIZE * 3)(%rsi), %ymm7
vpminub %ymm5, %ymm4, %ymm2
vpminub %ymm7, %ymm6, %ymm3
vpminub %ymm2, %ymm3, %ymm3
vpcmpeqb %ymmM, %ymm3, %ymm3
vpmovmskb %ymm3, %edx
# ifdef USE_AS_STRNCPY
sub $(VEC_SIZE * 4), %r8
jbe L(UnalignedLeaveCase2OrCase3)
# endif
test %edx, %edx
jnz L(UnalignedFourVecSizeLeave)
L(UnalignedFourVecSizeLoop_start):
add $(VEC_SIZE * 4), %rdi
add $(VEC_SIZE * 4), %rsi
vmovdqu %ymm4, -(VEC_SIZE * 4)(%rdi)
vmovdqa (%rsi), %ymm4
vmovdqu %ymm5, -(VEC_SIZE * 3)(%rdi)
vmovdqa VEC_SIZE(%rsi), %ymm5
vpminub %ymm5, %ymm4, %ymm2
vmovdqu %ymm6, -(VEC_SIZE * 2)(%rdi)
vmovdqa (VEC_SIZE * 2)(%rsi), %ymm6
vmovdqu %ymm7, -VEC_SIZE(%rdi)
vmovdqa (VEC_SIZE * 3)(%rsi), %ymm7
vpminub %ymm7, %ymm6, %ymm3
vpminub %ymm2, %ymm3, %ymm3
vpcmpeqb %ymmM, %ymm3, %ymm3
vpmovmskb %ymm3, %edx
# ifdef USE_AS_STRNCPY
sub $(VEC_SIZE * 4), %r8
jbe L(UnalignedLeaveCase2OrCase3)
# endif
test %edx, %edx
jz L(UnalignedFourVecSizeLoop_start)
L(UnalignedFourVecSizeLeave):
vpcmpeqb %ymm4, %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
test %edx, %edx
jnz L(CopyVecSizeUnaligned_0)
vpcmpeqb %ymm5, %ymmZ, %ymmM
vpmovmskb %ymmM, %ecx
test %ecx, %ecx
jnz L(CopyVecSizeUnaligned_16)
vpcmpeqb %ymm6, %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
test %edx, %edx
jnz L(CopyVecSizeUnaligned_32)
vpcmpeqb %ymm7, %ymmZ, %ymmM
vpmovmskb %ymmM, %ecx
bsf %ecx, %edx
vmovdqu %ymm4, (%rdi)
vmovdqu %ymm5, VEC_SIZE(%rdi)
vmovdqu %ymm6, (VEC_SIZE * 2)(%rdi)
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
# ifdef USE_AS_STPCPY
lea (VEC_SIZE * 3)(%rdi, %rdx), %rax
# endif
vmovdqu %ymm7, (VEC_SIZE * 3)(%rdi)
add $(VEC_SIZE - 1), %r8
sub %rdx, %r8
lea ((VEC_SIZE * 3) + 1)(%rdi, %rdx), %rdi
jmp L(StrncpyFillTailWithZero)
# else
add $(VEC_SIZE * 3), %rsi
add $(VEC_SIZE * 3), %rdi
jmp L(CopyVecSizeExit)
# endif
/* If source address alignment == destination address alignment */
L(SourceStringAlignmentLessTwoVecSize):
vmovdqu (%rsi), %ymm3
vmovdqu VEC_SIZE(%rsi), %ymm2
vpcmpeqb %ymm3, %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
# ifdef USE_AS_STRNCPY
# if defined USE_AS_STPCPY || defined USE_AS_STRCAT
cmp $VEC_SIZE, %r8
# else
cmp $(VEC_SIZE + 1), %r8
# endif
jbe L(CopyVecSizeTail1Case2OrCase3)
# endif
test %edx, %edx
jnz L(CopyVecSizeTail1)
vmovdqu %ymm3, (%rdi)
vpcmpeqb %ymm2, %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
# ifdef USE_AS_STRNCPY
# if defined USE_AS_STPCPY || defined USE_AS_STRCAT
cmp $(VEC_SIZE * 2), %r8
# else
cmp $((VEC_SIZE * 2) + 1), %r8
# endif
jbe L(CopyTwoVecSize1Case2OrCase3)
# endif
test %edx, %edx
jnz L(CopyTwoVecSize1)
and $-VEC_SIZE, %rsi
and $(VEC_SIZE - 1), %ecx
jmp L(UnalignVecSizeBoth)
/*------End of main part with loops---------------------*/
/* Case1 */
# if (!defined USE_AS_STRNCPY) || (defined USE_AS_STRCAT)
.p2align 4
L(CopyVecSize):
add %rcx, %rdi
# endif
L(CopyVecSizeTail):
add %rcx, %rsi
L(CopyVecSizeTail1):
bsf %edx, %edx
L(CopyVecSizeExit):
cmp $32, %edx
jae L(Exit32_63)
cmp $16, %edx
jae L(Exit16_31)
cmp $8, %edx
jae L(Exit8_15)
cmp $4, %edx
jae L(Exit4_7)
cmp $3, %edx
je L(Exit3)
cmp $1, %edx
ja L(Exit2)
je L(Exit1)
movb $0, (%rdi)
# ifdef USE_AS_STPCPY
lea (%rdi), %rax
# endif
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
sub $1, %r8
lea 1(%rdi), %rdi
jnz L(StrncpyFillTailWithZero)
# endif
L(return_vzeroupper):
ZERO_UPPER_VEC_REGISTERS_RETURN
.p2align 4
L(CopyTwoVecSize1):
add $VEC_SIZE, %rsi
add $VEC_SIZE, %rdi
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
sub $VEC_SIZE, %r8
# endif
jmp L(CopyVecSizeTail1)
.p2align 4
L(CopyTwoVecSize):
bsf %edx, %edx
add %rcx, %rsi
add $VEC_SIZE, %edx
sub %ecx, %edx
jmp L(CopyVecSizeExit)
.p2align 4
L(CopyVecSizeUnaligned_0):
bsf %edx, %edx
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
# ifdef USE_AS_STPCPY
lea (%rdi, %rdx), %rax
# endif
vmovdqu %ymm4, (%rdi)
add $((VEC_SIZE * 4) - 1), %r8
sub %rdx, %r8
lea 1(%rdi, %rdx), %rdi
jmp L(StrncpyFillTailWithZero)
# else
jmp L(CopyVecSizeExit)
# endif
.p2align 4
L(CopyVecSizeUnaligned_16):
bsf %ecx, %edx
vmovdqu %ymm4, (%rdi)
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
# ifdef USE_AS_STPCPY
lea VEC_SIZE(%rdi, %rdx), %rax
# endif
vmovdqu %ymm5, VEC_SIZE(%rdi)
add $((VEC_SIZE * 3) - 1), %r8
sub %rdx, %r8
lea (VEC_SIZE + 1)(%rdi, %rdx), %rdi
jmp L(StrncpyFillTailWithZero)
# else
add $VEC_SIZE, %rsi
add $VEC_SIZE, %rdi
jmp L(CopyVecSizeExit)
# endif
.p2align 4
L(CopyVecSizeUnaligned_32):
bsf %edx, %edx
vmovdqu %ymm4, (%rdi)
vmovdqu %ymm5, VEC_SIZE(%rdi)
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
# ifdef USE_AS_STPCPY
lea (VEC_SIZE * 2)(%rdi, %rdx), %rax
# endif
vmovdqu %ymm6, (VEC_SIZE * 2)(%rdi)
add $((VEC_SIZE * 2) - 1), %r8
sub %rdx, %r8
lea ((VEC_SIZE * 2) + 1)(%rdi, %rdx), %rdi
jmp L(StrncpyFillTailWithZero)
# else
add $(VEC_SIZE * 2), %rsi
add $(VEC_SIZE * 2), %rdi
jmp L(CopyVecSizeExit)
# endif
# ifdef USE_AS_STRNCPY
# ifndef USE_AS_STRCAT
.p2align 4
L(CopyVecSizeUnalignedVec6):
vmovdqu %ymm6, (%rdi, %rcx)
jmp L(CopyVecSizeVecExit)
.p2align 4
L(CopyVecSizeUnalignedVec5):
vmovdqu %ymm5, (%rdi, %rcx)
jmp L(CopyVecSizeVecExit)
.p2align 4
L(CopyVecSizeUnalignedVec4):
vmovdqu %ymm4, (%rdi, %rcx)
jmp L(CopyVecSizeVecExit)
.p2align 4
L(CopyVecSizeUnalignedVec3):
vmovdqu %ymm3, (%rdi, %rcx)
jmp L(CopyVecSizeVecExit)
# endif
/* Case2 */
.p2align 4
L(CopyVecSizeCase2):
add $VEC_SIZE, %r8
add %rcx, %rdi
add %rcx, %rsi
bsf %edx, %edx
cmp %r8d, %edx
jb L(CopyVecSizeExit)
jmp L(StrncpyExit)
.p2align 4
L(CopyTwoVecSizeCase2):
add %rcx, %rsi
bsf %edx, %edx
add $VEC_SIZE, %edx
sub %ecx, %edx
cmp %r8d, %edx
jb L(CopyVecSizeExit)
jmp L(StrncpyExit)
L(CopyVecSizeTailCase2):
add %rcx, %rsi
bsf %edx, %edx
cmp %r8d, %edx
jb L(CopyVecSizeExit)
jmp L(StrncpyExit)
L(CopyVecSizeTail1Case2):
bsf %edx, %edx
cmp %r8d, %edx
jb L(CopyVecSizeExit)
jmp L(StrncpyExit)
/* Case2 or Case3, Case3 */
.p2align 4
L(CopyVecSizeCase2OrCase3):
test %rdx, %rdx
jnz L(CopyVecSizeCase2)
L(CopyVecSizeCase3):
add $VEC_SIZE, %r8
add %rcx, %rdi
add %rcx, %rsi
jmp L(StrncpyExit)
.p2align 4
L(CopyTwoVecSizeCase2OrCase3):
test %rdx, %rdx
jnz L(CopyTwoVecSizeCase2)
add %rcx, %rsi
jmp L(StrncpyExit)
.p2align 4
L(CopyVecSizeTailCase2OrCase3):
test %rdx, %rdx
jnz L(CopyVecSizeTailCase2)
add %rcx, %rsi
jmp L(StrncpyExit)
.p2align 4
L(CopyTwoVecSize1Case2OrCase3):
add $VEC_SIZE, %rdi
add $VEC_SIZE, %rsi
sub $VEC_SIZE, %r8
L(CopyVecSizeTail1Case2OrCase3):
test %rdx, %rdx
jnz L(CopyVecSizeTail1Case2)
jmp L(StrncpyExit)
# endif
/*------------End labels regarding with copying 1-VEC_SIZE bytes--and 1-(VEC_SIZE*2) bytes----*/
.p2align 4
L(Exit1):
movzwl (%rsi), %edx
mov %dx, (%rdi)
# ifdef USE_AS_STPCPY
lea 1(%rdi), %rax
# endif
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
sub $2, %r8
lea 2(%rdi), %rdi
jnz L(StrncpyFillTailWithZero)
# endif
VZEROUPPER_RETURN
.p2align 4
L(Exit2):
movzwl (%rsi), %ecx
mov %cx, (%rdi)
movb $0, 2(%rdi)
# ifdef USE_AS_STPCPY
lea 2(%rdi), %rax
# endif
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
sub $3, %r8
lea 3(%rdi), %rdi
jnz L(StrncpyFillTailWithZero)
# endif
VZEROUPPER_RETURN
.p2align 4
L(Exit3):
mov (%rsi), %edx
mov %edx, (%rdi)
# ifdef USE_AS_STPCPY
lea 3(%rdi), %rax
# endif
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
sub $4, %r8
lea 4(%rdi), %rdi
jnz L(StrncpyFillTailWithZero)
# endif
VZEROUPPER_RETURN
.p2align 4
L(Exit4_7):
mov (%rsi), %ecx
mov %ecx, (%rdi)
mov -3(%rsi, %rdx), %ecx
mov %ecx, -3(%rdi, %rdx)
# ifdef USE_AS_STPCPY
lea (%rdi, %rdx), %rax
# endif
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
sub %rdx, %r8
sub $1, %r8
lea 1(%rdi, %rdx), %rdi
jnz L(StrncpyFillTailWithZero)
# endif
VZEROUPPER_RETURN
.p2align 4
L(Exit8_15):
mov (%rsi), %rcx
mov -7(%rsi, %rdx), %r9
mov %rcx, (%rdi)
mov %r9, -7(%rdi, %rdx)
# ifdef USE_AS_STPCPY
lea (%rdi, %rdx), %rax
# endif
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
sub %rdx, %r8
sub $1, %r8
lea 1(%rdi, %rdx), %rdi
jnz L(StrncpyFillTailWithZero)
# endif
VZEROUPPER_RETURN
.p2align 4
L(Exit16_31):
vmovdqu (%rsi), %xmm2
vmovdqu -15(%rsi, %rdx), %xmm3
vmovdqu %xmm2, (%rdi)
vmovdqu %xmm3, -15(%rdi, %rdx)
# ifdef USE_AS_STPCPY
lea (%rdi, %rdx), %rax
# endif
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
sub %rdx, %r8
sub $1, %r8
lea 1(%rdi, %rdx), %rdi
jnz L(StrncpyFillTailWithZero)
# endif
VZEROUPPER_RETURN
.p2align 4
L(Exit32_63):
vmovdqu (%rsi), %ymm2
vmovdqu -31(%rsi, %rdx), %ymm3
vmovdqu %ymm2, (%rdi)
vmovdqu %ymm3, -31(%rdi, %rdx)
# ifdef USE_AS_STPCPY
lea (%rdi, %rdx), %rax
# endif
# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
sub %rdx, %r8
sub $1, %r8
lea 1(%rdi, %rdx), %rdi
jnz L(StrncpyFillTailWithZero)
# endif
VZEROUPPER_RETURN
# ifdef USE_AS_STRNCPY
.p2align 4
L(StrncpyExit1):
movzbl (%rsi), %edx
mov %dl, (%rdi)
# ifdef USE_AS_STPCPY
lea 1(%rdi), %rax
# endif
# ifdef USE_AS_STRCAT
movb $0, 1(%rdi)
# endif
VZEROUPPER_RETURN
.p2align 4
L(StrncpyExit2):
movzwl (%rsi), %edx
mov %dx, (%rdi)
# ifdef USE_AS_STPCPY
lea 2(%rdi), %rax
# endif
# ifdef USE_AS_STRCAT
movb $0, 2(%rdi)
# endif
VZEROUPPER_RETURN
.p2align 4
L(StrncpyExit3_4):
movzwl (%rsi), %ecx
movzwl -2(%rsi, %r8), %edx
mov %cx, (%rdi)
mov %dx, -2(%rdi, %r8)
# ifdef USE_AS_STPCPY
lea (%rdi, %r8), %rax
# endif
# ifdef USE_AS_STRCAT
movb $0, (%rdi, %r8)
# endif
VZEROUPPER_RETURN
.p2align 4
L(StrncpyExit5_8):
mov (%rsi), %ecx
mov -4(%rsi, %r8), %edx
mov %ecx, (%rdi)
mov %edx, -4(%rdi, %r8)
# ifdef USE_AS_STPCPY
lea (%rdi, %r8), %rax
# endif
# ifdef USE_AS_STRCAT
movb $0, (%rdi, %r8)
# endif
VZEROUPPER_RETURN
.p2align 4
L(StrncpyExit9_16):
mov (%rsi), %rcx
mov -8(%rsi, %r8), %rdx
mov %rcx, (%rdi)
mov %rdx, -8(%rdi, %r8)
# ifdef USE_AS_STPCPY
lea (%rdi, %r8), %rax
# endif
# ifdef USE_AS_STRCAT
movb $0, (%rdi, %r8)
# endif
VZEROUPPER_RETURN
.p2align 4
L(StrncpyExit17_32):
vmovdqu (%rsi), %xmm2
vmovdqu -16(%rsi, %r8), %xmm3
vmovdqu %xmm2, (%rdi)
vmovdqu %xmm3, -16(%rdi, %r8)
# ifdef USE_AS_STPCPY
lea (%rdi, %r8), %rax
# endif
# ifdef USE_AS_STRCAT
movb $0, (%rdi, %r8)
# endif
VZEROUPPER_RETURN
.p2align 4
L(StrncpyExit33_64):
/* 0/32, 31/16 */
vmovdqu (%rsi), %ymm2
vmovdqu -VEC_SIZE(%rsi, %r8), %ymm3
vmovdqu %ymm2, (%rdi)
vmovdqu %ymm3, -VEC_SIZE(%rdi, %r8)
# ifdef USE_AS_STPCPY
lea (%rdi, %r8), %rax
# endif
# ifdef USE_AS_STRCAT
movb $0, (%rdi, %r8)
# endif
VZEROUPPER_RETURN
.p2align 4
L(StrncpyExit65):
/* 0/32, 32/32, 64/1 */
vmovdqu (%rsi), %ymm2
vmovdqu 32(%rsi), %ymm3
mov 64(%rsi), %cl
vmovdqu %ymm2, (%rdi)
vmovdqu %ymm3, 32(%rdi)
mov %cl, 64(%rdi)
# ifdef USE_AS_STPCPY
lea 65(%rdi), %rax
# endif
# ifdef USE_AS_STRCAT
movb $0, 65(%rdi)
# endif
VZEROUPPER_RETURN
# ifndef USE_AS_STRCAT
.p2align 4
L(Fill1):
mov %dl, (%rdi)
VZEROUPPER_RETURN
.p2align 4
L(Fill2):
mov %dx, (%rdi)
VZEROUPPER_RETURN
.p2align 4
L(Fill3_4):
mov %dx, (%rdi)
mov %dx, -2(%rdi, %r8)
VZEROUPPER_RETURN
.p2align 4
L(Fill5_8):
mov %edx, (%rdi)
mov %edx, -4(%rdi, %r8)
VZEROUPPER_RETURN
.p2align 4
L(Fill9_16):
mov %rdx, (%rdi)
mov %rdx, -8(%rdi, %r8)
VZEROUPPER_RETURN
.p2align 4
L(Fill17_32):
vmovdqu %xmmZ, (%rdi)
vmovdqu %xmmZ, -16(%rdi, %r8)
VZEROUPPER_RETURN
.p2align 4
L(CopyVecSizeUnalignedVec2):
vmovdqu %ymm2, (%rdi, %rcx)
.p2align 4
L(CopyVecSizeVecExit):
bsf %edx, %edx
add $(VEC_SIZE - 1), %r8
add %rcx, %rdi
# ifdef USE_AS_STPCPY
lea (%rdi, %rdx), %rax
# endif
sub %rdx, %r8
lea 1(%rdi, %rdx), %rdi
.p2align 4
L(StrncpyFillTailWithZero):
xor %edx, %edx
sub $VEC_SIZE, %r8
jbe L(StrncpyFillExit)
vmovdqu %ymmZ, (%rdi)
add $VEC_SIZE, %rdi
mov %rdi, %rsi
and $(VEC_SIZE - 1), %esi
sub %rsi, %rdi
add %rsi, %r8
sub $(VEC_SIZE * 4), %r8
jb L(StrncpyFillLessFourVecSize)
L(StrncpyFillLoopVmovdqa):
vmovdqa %ymmZ, (%rdi)
vmovdqa %ymmZ, VEC_SIZE(%rdi)
vmovdqa %ymmZ, (VEC_SIZE * 2)(%rdi)
vmovdqa %ymmZ, (VEC_SIZE * 3)(%rdi)
add $(VEC_SIZE * 4), %rdi
sub $(VEC_SIZE * 4), %r8
jae L(StrncpyFillLoopVmovdqa)
L(StrncpyFillLessFourVecSize):
add $(VEC_SIZE * 2), %r8
jl L(StrncpyFillLessTwoVecSize)
vmovdqa %ymmZ, (%rdi)
vmovdqa %ymmZ, VEC_SIZE(%rdi)
add $(VEC_SIZE * 2), %rdi
sub $VEC_SIZE, %r8
jl L(StrncpyFillExit)
vmovdqa %ymmZ, (%rdi)
add $VEC_SIZE, %rdi
jmp L(Fill)
.p2align 4
L(StrncpyFillLessTwoVecSize):
add $VEC_SIZE, %r8
jl L(StrncpyFillExit)
vmovdqa %ymmZ, (%rdi)
add $VEC_SIZE, %rdi
jmp L(Fill)
.p2align 4
L(StrncpyFillExit):
add $VEC_SIZE, %r8
L(Fill):
cmp $17, %r8d
jae L(Fill17_32)
cmp $9, %r8d
jae L(Fill9_16)
cmp $5, %r8d
jae L(Fill5_8)
cmp $3, %r8d
jae L(Fill3_4)
cmp $1, %r8d
ja L(Fill2)
je L(Fill1)
VZEROUPPER_RETURN
/* end of ifndef USE_AS_STRCAT */
# endif
.p2align 4
L(UnalignedLeaveCase2OrCase3):
test %rdx, %rdx
jnz L(UnalignedFourVecSizeLeaveCase2)
L(UnalignedFourVecSizeLeaveCase3):
lea (VEC_SIZE * 4)(%r8), %rcx
and $-VEC_SIZE, %rcx
add $(VEC_SIZE * 3), %r8
jl L(CopyVecSizeCase3)
vmovdqu %ymm4, (%rdi)
sub $VEC_SIZE, %r8
jb L(CopyVecSizeCase3)
vmovdqu %ymm5, VEC_SIZE(%rdi)
sub $VEC_SIZE, %r8
jb L(CopyVecSizeCase3)
vmovdqu %ymm6, (VEC_SIZE * 2)(%rdi)
sub $VEC_SIZE, %r8
jb L(CopyVecSizeCase3)
vmovdqu %ymm7, (VEC_SIZE * 3)(%rdi)
# ifdef USE_AS_STPCPY
lea (VEC_SIZE * 4)(%rdi), %rax
# endif
# ifdef USE_AS_STRCAT
movb $0, (VEC_SIZE * 4)(%rdi)
# endif
VZEROUPPER_RETURN
.p2align 4
L(UnalignedFourVecSizeLeaveCase2):
xor %ecx, %ecx
vpcmpeqb %ymm4, %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
add $(VEC_SIZE * 3), %r8
jle L(CopyVecSizeCase2OrCase3)
test %edx, %edx
# ifndef USE_AS_STRCAT
jnz L(CopyVecSizeUnalignedVec4)
# else
jnz L(CopyVecSize)
# endif
vpcmpeqb %ymm5, %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
vmovdqu %ymm4, (%rdi)
add $VEC_SIZE, %rcx
sub $VEC_SIZE, %r8
jbe L(CopyVecSizeCase2OrCase3)
test %edx, %edx
# ifndef USE_AS_STRCAT
jnz L(CopyVecSizeUnalignedVec5)
# else
jnz L(CopyVecSize)
# endif
vpcmpeqb %ymm6, %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
vmovdqu %ymm5, VEC_SIZE(%rdi)
add $VEC_SIZE, %rcx
sub $VEC_SIZE, %r8
jbe L(CopyVecSizeCase2OrCase3)
test %edx, %edx
# ifndef USE_AS_STRCAT
jnz L(CopyVecSizeUnalignedVec6)
# else
jnz L(CopyVecSize)
# endif
vpcmpeqb %ymm7, %ymmZ, %ymmM
vpmovmskb %ymmM, %edx
vmovdqu %ymm6, (VEC_SIZE * 2)(%rdi)
lea VEC_SIZE(%rdi, %rcx), %rdi
lea VEC_SIZE(%rsi, %rcx), %rsi
bsf %edx, %edx
cmp %r8d, %edx
jb L(CopyVecSizeExit)
L(StrncpyExit):
cmp $65, %r8d
je L(StrncpyExit65)
cmp $33, %r8d
jae L(StrncpyExit33_64)
cmp $17, %r8d
jae L(StrncpyExit17_32)
cmp $9, %r8d
jae L(StrncpyExit9_16)
cmp $5, %r8d
jae L(StrncpyExit5_8)
cmp $3, %r8d
jae L(StrncpyExit3_4)
cmp $1, %r8d
ja L(StrncpyExit2)
je L(StrncpyExit1)
# ifdef USE_AS_STPCPY
mov %rdi, %rax
# endif
# ifdef USE_AS_STRCAT
movb $0, (%rdi)
# endif
VZEROUPPER_RETURN
.p2align 4
L(ExitZero):
# ifndef USE_AS_STRCAT
mov %rdi, %rax
# endif
VZEROUPPER_RETURN
# endif
# ifndef USE_AS_STRCAT
END (STRCPY)
# else
END (STRCAT)
# endif
#endif
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