/* strcat with SSSE3
Copyright (C) 2011-2018 Free Software Foundation, Inc.
Contributed by Intel Corporation.
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/>. */
#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