glibc/sysdeps/x86_64/multiarch/strlen-sse2-no-bsf.S
Ulrich Drepper 09229f3e1b Fix WS
2011-10-23 14:57:28 -04:00

687 lines
10 KiB
ArmAsm

/* strlen SSE2 without bsf
Copyright (C) 2010, 2011 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/* only for strlen case we don't use optimized version for STATIC build just for SHARED */
#if (defined SHARED || defined USE_AS_STRCAT || defined USE_AS_STRNLEN) && !defined NOT_IN_libc
# ifndef USE_AS_STRCAT
# include <sysdep.h>
# define RETURN ret
# ifndef STRLEN
# define STRLEN __strlen_sse2_no_bsf
# endif
atom_text_section
ENTRY (STRLEN)
# endif
xor %eax, %eax
# ifdef USE_AS_STRNLEN
mov %rsi, %r8
sub $4, %rsi
jbe L(len_less4_prolog)
# endif
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)
# ifdef USE_AS_STRNLEN
sub $4, %rsi
jbe L(len_less8_prolog)
# endif
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)
# ifdef USE_AS_STRNLEN
sub $4, %rsi
jbe L(len_less12_prolog)
# endif
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)
# ifdef USE_AS_STRNLEN
sub $4, %rsi
jbe L(len_less16_prolog)
# endif
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
# ifdef USE_AS_STRNLEN
and $15, %rdi
add %rdi, %rsi
sub $64, %rsi
jbe L(len_less64)
# endif
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)
# ifdef USE_AS_STRNLEN
sub $64, %rsi
jbe L(len_less64)
# endif
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)
# ifdef USE_AS_STRNLEN
sub $64, %rsi
jbe L(len_less64)
# endif
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)
# ifdef USE_AS_STRNLEN
sub $64, %rsi
jbe L(len_less64)
# endif
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)
# ifdef USE_AS_STRNLEN
mov %rax, %rdx
and $63, %rdx
add %rdx, %rsi
# endif
and $-0x40, %rax
.p2align 4
L(aligned_64):
# ifdef USE_AS_STRNLEN
sub $64, %rsi
jbe L(len_less64)
# endif
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(aligned_64_exit)
L(aligned_64_exit_48):
lea -16(%rax), %rax
mov %r10d, %edx
jmp L(aligned_64_exit)
L(aligned_64_exit_32):
lea -32(%rax), %rax
mov %r11d, %edx
jmp L(aligned_64_exit)
L(aligned_64_exit_16):
lea -48(%rax), %rax
L(aligned_64_exit):
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):
RETURN
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
RETURN
# ifdef USE_AS_STRNLEN
.p2align 4
L(len_less64):
pxor %xmm0, %xmm0
add $64, %rsi
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
pxor %xmm1, %xmm1
lea 16(%rax), %rax
test %edx, %edx
jnz L(strnlen_exit)
sub $16, %rsi
jbe L(return_start_len)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
lea 16(%rax), %rax
test %edx, %edx
jnz L(strnlen_exit)
sub $16, %rsi
jbe L(return_start_len)
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
lea 16(%rax), %rax
test %edx, %edx
jnz L(strnlen_exit)
sub $16, %rsi
jbe L(return_start_len)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
lea 16(%rax), %rax
test %edx, %edx
jnz L(strnlen_exit)
mov %r8, %rax
ret
.p2align 4
L(strnlen_exit):
sub %rcx, %rax
test %dl, %dl
jz L(strnlen_exit_high)
mov %dl, %cl
and $15, %cl
jz L(strnlen_exit_8)
test $0x01, %dl
jnz L(exit_tail0)
test $0x02, %dl
jnz L(strnlen_exit_tail1)
test $0x04, %dl
jnz L(strnlen_exit_tail2)
sub $4, %rsi
jb L(return_start_len)
lea 3(%eax), %eax
ret
.p2align 4
L(strnlen_exit_8):
test $0x10, %dl
jnz L(strnlen_exit_tail4)
test $0x20, %dl
jnz L(strnlen_exit_tail5)
test $0x40, %dl
jnz L(strnlen_exit_tail6)
sub $8, %rsi
jb L(return_start_len)
lea 7(%eax), %eax
ret
.p2align 4
L(strnlen_exit_high):
mov %dh, %ch
and $15, %ch
jz L(strnlen_exit_high_8)
test $0x01, %dh
jnz L(strnlen_exit_tail8)
test $0x02, %dh
jnz L(strnlen_exit_tail9)
test $0x04, %dh
jnz L(strnlen_exit_tail10)
sub $12, %rsi
jb L(return_start_len)
lea 11(%eax), %eax
ret
.p2align 4
L(strnlen_exit_high_8):
test $0x10, %dh
jnz L(strnlen_exit_tail12)
test $0x20, %dh
jnz L(strnlen_exit_tail13)
test $0x40, %dh
jnz L(strnlen_exit_tail14)
sub $16, %rsi
jb L(return_start_len)
lea 15(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail1):
sub $2, %rsi
jb L(return_start_len)
lea 1(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail2):
sub $3, %rsi
jb L(return_start_len)
lea 2(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail4):
sub $5, %rsi
jb L(return_start_len)
lea 4(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail5):
sub $6, %rsi
jb L(return_start_len)
lea 5(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail6):
sub $7, %rsi
jb L(return_start_len)
lea 6(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail8):
sub $9, %rsi
jb L(return_start_len)
lea 8(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail9):
sub $10, %rsi
jb L(return_start_len)
lea 9(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail10):
sub $11, %rsi
jb L(return_start_len)
lea 10(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail12):
sub $13, %rsi
jb L(return_start_len)
lea 12(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail13):
sub $14, %rsi
jb L(return_start_len)
lea 13(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail14):
sub $15, %rsi
jb L(return_start_len)
lea 14(%eax), %eax
ret
.p2align 4
L(return_start_len):
mov %r8, %rax
ret
/* for prolog only */
.p2align 4
L(len_less4_prolog):
add $4, %rsi
jz L(exit_tail0)
cmpb $0, (%rdi)
jz L(exit_tail0)
cmp $1, %esi
je L(exit_tail1)
cmpb $0, 1(%rdi)
jz L(exit_tail1)
cmp $2, %esi
je L(exit_tail2)
cmpb $0, 2(%rdi)
jz L(exit_tail2)
cmp $3, %esi
je L(exit_tail3)
cmpb $0, 3(%rdi)
jz L(exit_tail3)
mov $4, %eax
ret
.p2align 4
L(len_less8_prolog):
add $4, %rsi
cmpb $0, 4(%rdi)
jz L(exit_tail4)
cmp $1, %esi
je L(exit_tail5)
cmpb $0, 5(%rdi)
jz L(exit_tail5)
cmp $2, %esi
je L(exit_tail6)
cmpb $0, 6(%rdi)
jz L(exit_tail6)
cmp $3, %esi
je L(exit_tail7)
cmpb $0, 7(%rdi)
jz L(exit_tail7)
mov $8, %eax
ret
.p2align 4
L(len_less12_prolog):
add $4, %rsi
cmpb $0, 8(%rdi)
jz L(exit_tail8)
cmp $1, %esi
je L(exit_tail9)
cmpb $0, 9(%rdi)
jz L(exit_tail9)
cmp $2, %esi
je L(exit_tail10)
cmpb $0, 10(%rdi)
jz L(exit_tail10)
cmp $3, %esi
je L(exit_tail11)
cmpb $0, 11(%rdi)
jz L(exit_tail11)
mov $12, %eax
ret
.p2align 4
L(len_less16_prolog):
add $4, %rsi
cmpb $0, 12(%rdi)
jz L(exit_tail12)
cmp $1, %esi
je L(exit_tail13)
cmpb $0, 13(%rdi)
jz L(exit_tail13)
cmp $2, %esi
je L(exit_tail14)
cmpb $0, 14(%rdi)
jz L(exit_tail14)
cmp $3, %esi
je L(exit_tail15)
cmpb $0, 15(%rdi)
jz L(exit_tail15)
mov $16, %eax
ret
# endif
.p2align 4
L(exit_tail1):
add $1, %eax
RETURN
.p2align 4
L(exit_tail2):
add $2, %eax
RETURN
.p2align 4
L(exit_tail3):
add $3, %eax
RETURN
.p2align 4
L(exit_tail4):
add $4, %eax
RETURN
.p2align 4
L(exit_tail5):
add $5, %eax
RETURN
.p2align 4
L(exit_tail6):
add $6, %eax
RETURN
.p2align 4
L(exit_tail7):
add $7, %eax
RETURN
.p2align 4
L(exit_tail8):
add $8, %eax
RETURN
.p2align 4
L(exit_tail9):
add $9, %eax
RETURN
.p2align 4
L(exit_tail10):
add $10, %eax
RETURN
.p2align 4
L(exit_tail11):
add $11, %eax
RETURN
.p2align 4
L(exit_tail12):
add $12, %eax
RETURN
.p2align 4
L(exit_tail13):
add $13, %eax
RETURN
.p2align 4
L(exit_tail14):
add $14, %eax
RETURN
.p2align 4
L(exit_tail15):
add $15, %eax
# ifndef USE_AS_STRCAT
RETURN
END (STRLEN)
# endif
#endif