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30891f35fa
glibc/sysdeps/x86_64/multiarch/strcat-ssse3.S
Siddhesh Poyarekar 30891f35fa Remove "Contributed by" lines 
We stopped adding "Contributed by" or similar lines in sources in 2012
in favour of git logs and keeping the Contributors section of the
glibc manual up to date.  Removing these lines makes the license
header a bit more consistent across files and also removes the
possibility of error in attribution when license blocks or files are
copied across since the contributed-by lines don't actually reflect
reality in those cases.

Move all "Contributed by" and similar lines (Written by, Test by,
etc.) into a new file CONTRIBUTED-BY to retain record of these
contributions.  These contributors are also mentioned in
manual/contrib.texi, so we just maintain this additional record as a
courtesy to the earlier developers.

The following scripts were used to filter a list of files to edit in
place and to clean up the CONTRIBUTED-BY file respectively.  These
were not added to the glibc sources because they're not expected to be
of any use in future given that this is a one time task:

https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc
https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2021-09-03 22:06:44 +05:30

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/* strcat with SSSE3
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)
# include <sysdep.h>
# ifndef STRCAT
# define STRCAT __strcat_ssse3
# endif
# define USE_AS_STRCAT
.text
ENTRY (STRCAT)
# ifdef USE_AS_STRNCAT
mov %rdx, %r8
# endif
/* Inline corresponding strlen file, temporary until new strcpy
implementation gets merged. */
xor %eax, %eax
cmpb $0, (%rdi)
jz L(exit_tail0)
cmpb $0, 1(%rdi)
jz L(exit_tail1)
cmpb $0, 2(%rdi)
jz L(exit_tail2)
cmpb $0, 3(%rdi)
jz L(exit_tail3)
cmpb $0, 4(%rdi)
jz L(exit_tail4)
cmpb $0, 5(%rdi)
jz L(exit_tail5)
cmpb $0, 6(%rdi)
jz L(exit_tail6)
cmpb $0, 7(%rdi)
jz L(exit_tail7)
cmpb $0, 8(%rdi)
jz L(exit_tail8)
cmpb $0, 9(%rdi)
jz L(exit_tail9)
cmpb $0, 10(%rdi)
jz L(exit_tail10)
cmpb $0, 11(%rdi)
jz L(exit_tail11)
cmpb $0, 12(%rdi)
jz L(exit_tail12)
cmpb $0, 13(%rdi)
jz L(exit_tail13)
cmpb $0, 14(%rdi)
jz L(exit_tail14)
cmpb $0, 15(%rdi)
jz L(exit_tail15)
pxor %xmm0, %xmm0
lea 16(%rdi), %rcx
lea 16(%rdi), %rax
and $-16, %rax
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
pxor %xmm1, %xmm1
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
pxor %xmm2, %xmm2
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm2
pmovmskb %xmm2, %edx
pxor %xmm3, %xmm3
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
and $-0x40, %rax
.p2align 4
L(aligned_64):
pcmpeqb (%rax), %xmm0
pcmpeqb 16(%rax), %xmm1
pcmpeqb 32(%rax), %xmm2
pcmpeqb 48(%rax), %xmm3
pmovmskb %xmm0, %edx
pmovmskb %xmm1, %r11d
pmovmskb %xmm2, %r10d
pmovmskb %xmm3, %r9d
or %edx, %r9d
or %r11d, %r9d
or %r10d, %r9d
lea 64(%rax), %rax
jz L(aligned_64)
test %edx, %edx
jnz L(aligned_64_exit_16)
test %r11d, %r11d
jnz L(aligned_64_exit_32)
test %r10d, %r10d
jnz L(aligned_64_exit_48)
L(aligned_64_exit_64):
pmovmskb %xmm3, %edx
jmp L(exit)
L(aligned_64_exit_48):
lea -16(%rax), %rax
mov %r10d, %edx
jmp L(exit)
L(aligned_64_exit_32):
lea -32(%rax), %rax
mov %r11d, %edx
jmp L(exit)
L(aligned_64_exit_16):
lea -48(%rax), %rax
L(exit):
sub %rcx, %rax
test %dl, %dl
jz L(exit_high)
test $0x01, %dl
jnz L(exit_tail0)
test $0x02, %dl
jnz L(exit_tail1)
test $0x04, %dl
jnz L(exit_tail2)
test $0x08, %dl
jnz L(exit_tail3)
test $0x10, %dl
jnz L(exit_tail4)
test $0x20, %dl
jnz L(exit_tail5)
test $0x40, %dl
jnz L(exit_tail6)
add $7, %eax
L(exit_tail0):
jmp L(StartStrcpyPart)
.p2align 4
L(exit_high):
add $8, %eax
test $0x01, %dh
jnz L(exit_tail0)
test $0x02, %dh
jnz L(exit_tail1)
test $0x04, %dh
jnz L(exit_tail2)
test $0x08, %dh
jnz L(exit_tail3)
test $0x10, %dh
jnz L(exit_tail4)
test $0x20, %dh
jnz L(exit_tail5)
test $0x40, %dh
jnz L(exit_tail6)
add $7, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail1):
add $1, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail2):
add $2, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail3):
add $3, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail4):
add $4, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail5):
add $5, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail6):
add $6, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail7):
add $7, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail8):
add $8, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail9):
add $9, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail10):
add $10, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail11):
add $11, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail12):
add $12, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail13):
add $13, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail14):
add $14, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail15):
add $15, %eax
.p2align 4
L(StartStrcpyPart):
mov %rsi, %rcx
lea (%rdi, %rax), %rdx
# ifdef USE_AS_STRNCAT
test %r8, %r8
jz L(StrncatExit0)
cmp $8, %r8
jbe L(StrncatExit8Bytes)
# endif
cmpb $0, (%rcx)
jz L(Exit1)
cmpb $0, 1(%rcx)
jz L(Exit2)
cmpb $0, 2(%rcx)
jz L(Exit3)
cmpb $0, 3(%rcx)
jz L(Exit4)
cmpb $0, 4(%rcx)
jz L(Exit5)
cmpb $0, 5(%rcx)
jz L(Exit6)
cmpb $0, 6(%rcx)
jz L(Exit7)
cmpb $0, 7(%rcx)
jz L(Exit8)
cmpb $0, 8(%rcx)
jz L(Exit9)
# ifdef USE_AS_STRNCAT
cmp $16, %r8
jb L(StrncatExit15Bytes)
# endif
cmpb $0, 9(%rcx)
jz L(Exit10)
cmpb $0, 10(%rcx)
jz L(Exit11)
cmpb $0, 11(%rcx)
jz L(Exit12)
cmpb $0, 12(%rcx)
jz L(Exit13)
cmpb $0, 13(%rcx)
jz L(Exit14)
cmpb $0, 14(%rcx)
jz L(Exit15)
cmpb $0, 15(%rcx)
jz L(Exit16)
# ifdef USE_AS_STRNCAT
cmp $16, %r8
je L(StrncatExit16)
# define USE_AS_STRNCPY
# endif
# include "strcpy-ssse3.S"
.p2align 4
L(CopyFrom1To16Bytes):
add %rsi, %rdx
add %rsi, %rcx
test %al, %al
jz L(ExitHigh)
test $0x01, %al
jnz L(Exit1)
test $0x02, %al
jnz L(Exit2)
test $0x04, %al
jnz L(Exit3)
test $0x08, %al
jnz L(Exit4)
test $0x10, %al
jnz L(Exit5)
test $0x20, %al
jnz L(Exit6)
test $0x40, %al
jnz L(Exit7)
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
mov %rdi, %rax
ret
.p2align 4
L(ExitHigh):
test $0x01, %ah
jnz L(Exit9)
test $0x02, %ah
jnz L(Exit10)
test $0x04, %ah
jnz L(Exit11)
test $0x08, %ah
jnz L(Exit12)
test $0x10, %ah
jnz L(Exit13)
test $0x20, %ah
jnz L(Exit14)
test $0x40, %ah
jnz L(Exit15)
movlpd (%rcx), %xmm0
movlpd 8(%rcx), %xmm1
movlpd %xmm0, (%rdx)
movlpd %xmm1, 8(%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit1):
xor %ah, %ah
movb %ah, 1(%rdx)
L(Exit1):
movb (%rcx), %al
movb %al, (%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit2):
xor %ah, %ah
movb %ah, 2(%rdx)
L(Exit2):
movw (%rcx), %ax
movw %ax, (%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit3):
xor %ah, %ah
movb %ah, 3(%rdx)
L(Exit3):
movw (%rcx), %ax
movw %ax, (%rdx)
movb 2(%rcx), %al
movb %al, 2(%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit4):
xor %ah, %ah
movb %ah, 4(%rdx)
L(Exit4):
mov (%rcx), %eax
mov %eax, (%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit5):
xor %ah, %ah
movb %ah, 5(%rdx)
L(Exit5):
mov (%rcx), %eax
mov %eax, (%rdx)
movb 4(%rcx), %al
movb %al, 4(%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit6):
xor %ah, %ah
movb %ah, 6(%rdx)
L(Exit6):
mov (%rcx), %eax
mov %eax, (%rdx)
movw 4(%rcx), %ax
movw %ax, 4(%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit7):
xor %ah, %ah
movb %ah, 7(%rdx)
L(Exit7):
mov (%rcx), %eax
mov %eax, (%rdx)
mov 3(%rcx), %eax
mov %eax, 3(%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit8):
xor %ah, %ah
movb %ah, 8(%rdx)
L(Exit8):
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit9):
xor %ah, %ah
movb %ah, 9(%rdx)
L(Exit9):
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
movb 8(%rcx), %al
movb %al, 8(%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit10):
xor %ah, %ah
movb %ah, 10(%rdx)
L(Exit10):
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
movw 8(%rcx), %ax
movw %ax, 8(%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit11):
xor %ah, %ah
movb %ah, 11(%rdx)
L(Exit11):
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
mov 7(%rcx), %eax
mov %eax, 7(%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit12):
xor %ah, %ah
movb %ah, 12(%rdx)
L(Exit12):
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
mov 8(%rcx), %eax
mov %eax, 8(%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit13):
xor %ah, %ah
movb %ah, 13(%rdx)
L(Exit13):
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
movlpd 5(%rcx), %xmm1
movlpd %xmm1, 5(%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit14):
xor %ah, %ah
movb %ah, 14(%rdx)
L(Exit14):
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
movlpd 6(%rcx), %xmm1
movlpd %xmm1, 6(%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit15):
xor %ah, %ah
movb %ah, 15(%rdx)
L(Exit15):
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
movlpd 7(%rcx), %xmm1
movlpd %xmm1, 7(%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit16):
xor %ah, %ah
movb %ah, 16(%rdx)
L(Exit16):
movlpd (%rcx), %xmm0
movlpd 8(%rcx), %xmm1
movlpd %xmm0, (%rdx)
movlpd %xmm1, 8(%rdx)
mov %rdi, %rax
ret
# ifdef USE_AS_STRNCPY
.p2align 4
L(CopyFrom1To16BytesCase2):
add $16, %r8
add %rsi, %rcx
lea (%rsi, %rdx), %rsi
lea -9(%r8), %rdx
and $1<<7, %dh
or %al, %dh
test %dh, %dh
lea (%rsi), %rdx
jz L(ExitHighCase2)
test $0x01, %al
jnz L(Exit1)
cmp $1, %r8
je L(StrncatExit1)
test $0x02, %al
jnz L(Exit2)
cmp $2, %r8
je L(StrncatExit2)
test $0x04, %al
jnz L(Exit3)
cmp $3, %r8
je L(StrncatExit3)
test $0x08, %al
jnz L(Exit4)
cmp $4, %r8
je L(StrncatExit4)
test $0x10, %al
jnz L(Exit5)
cmp $5, %r8
je L(StrncatExit5)
test $0x20, %al
jnz L(Exit6)
cmp $6, %r8
je L(StrncatExit6)
test $0x40, %al
jnz L(Exit7)
cmp $7, %r8
je L(StrncatExit7)
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
lea 7(%rdx), %rax
cmpb $1, (%rax)
sbb $-1, %rax
xor %cl, %cl
movb %cl, (%rax)
mov %rdi, %rax
ret
.p2align 4
L(ExitHighCase2):
test $0x01, %ah
jnz L(Exit9)
cmp $9, %r8
je L(StrncatExit9)
test $0x02, %ah
jnz L(Exit10)
cmp $10, %r8
je L(StrncatExit10)
test $0x04, %ah
jnz L(Exit11)
cmp $11, %r8
je L(StrncatExit11)
test $0x8, %ah
jnz L(Exit12)
cmp $12, %r8
je L(StrncatExit12)
test $0x10, %ah
jnz L(Exit13)
cmp $13, %r8
je L(StrncatExit13)
test $0x20, %ah
jnz L(Exit14)
cmp $14, %r8
je L(StrncatExit14)
test $0x40, %ah
jnz L(Exit15)
cmp $15, %r8
je L(StrncatExit15)
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
movlpd 8(%rcx), %xmm1
movlpd %xmm1, 8(%rdx)
mov %rdi, %rax
ret
L(CopyFrom1To16BytesCase2OrCase3):
test %rax, %rax
jnz L(CopyFrom1To16BytesCase2)
.p2align 4
L(CopyFrom1To16BytesCase3):
add $16, %r8
add %rsi, %rdx
add %rsi, %rcx
cmp $8, %r8
ja L(ExitHighCase3)
cmp $1, %r8
je L(StrncatExit1)
cmp $2, %r8
je L(StrncatExit2)
cmp $3, %r8
je L(StrncatExit3)
cmp $4, %r8
je L(StrncatExit4)
cmp $5, %r8
je L(StrncatExit5)
cmp $6, %r8
je L(StrncatExit6)
cmp $7, %r8
je L(StrncatExit7)
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
xor %ah, %ah
movb %ah, 8(%rdx)
mov %rdi, %rax
ret
.p2align 4
L(ExitHighCase3):
cmp $9, %r8
je L(StrncatExit9)
cmp $10, %r8
je L(StrncatExit10)
cmp $11, %r8
je L(StrncatExit11)
cmp $12, %r8
je L(StrncatExit12)
cmp $13, %r8
je L(StrncatExit13)
cmp $14, %r8
je L(StrncatExit14)
cmp $15, %r8
je L(StrncatExit15)
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
movlpd 8(%rcx), %xmm1
movlpd %xmm1, 8(%rdx)
xor %ah, %ah
movb %ah, 16(%rdx)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit0):
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit15Bytes):
cmp $9, %r8
je L(StrncatExit9)
cmpb $0, 9(%rcx)
jz L(Exit10)
cmp $10, %r8
je L(StrncatExit10)
cmpb $0, 10(%rcx)
jz L(Exit11)
cmp $11, %r8
je L(StrncatExit11)
cmpb $0, 11(%rcx)
jz L(Exit12)
cmp $12, %r8
je L(StrncatExit12)
cmpb $0, 12(%rcx)
jz L(Exit13)
cmp $13, %r8
je L(StrncatExit13)
cmpb $0, 13(%rcx)
jz L(Exit14)
cmp $14, %r8
je L(StrncatExit14)
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
movlpd 7(%rcx), %xmm1
movlpd %xmm1, 7(%rdx)
lea 14(%rdx), %rax
cmpb $1, (%rax)
sbb $-1, %rax
xor %cl, %cl
movb %cl, (%rax)
mov %rdi, %rax
ret
.p2align 4
L(StrncatExit8Bytes):
cmpb $0, (%rcx)
jz L(Exit1)
cmp $1, %r8
je L(StrncatExit1)
cmpb $0, 1(%rcx)
jz L(Exit2)
cmp $2, %r8
je L(StrncatExit2)
cmpb $0, 2(%rcx)
jz L(Exit3)
cmp $3, %r8
je L(StrncatExit3)
cmpb $0, 3(%rcx)
jz L(Exit4)
cmp $4, %r8
je L(StrncatExit4)
cmpb $0, 4(%rcx)
jz L(Exit5)
cmp $5, %r8
je L(StrncatExit5)
cmpb $0, 5(%rcx)
jz L(Exit6)
cmp $6, %r8
je L(StrncatExit6)
cmpb $0, 6(%rcx)
jz L(Exit7)
cmp $7, %r8
je L(StrncatExit7)
movlpd (%rcx), %xmm0
movlpd %xmm0, (%rdx)
lea 7(%rdx), %rax
cmpb $1, (%rax)
sbb $-1, %rax
xor %cl, %cl
movb %cl, (%rax)
mov %rdi, %rax
ret
# endif
END (STRCAT)
#endif
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