mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-29 08:11:08 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
724 lines
11 KiB
ArmAsm
724 lines
11 KiB
ArmAsm
/* Optimized memrchr with sse2 without bsf
|
|
Copyright (C) 2011-2022 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>
|
|
# define CFI_PUSH(REG) \
|
|
cfi_adjust_cfa_offset (4); \
|
|
cfi_rel_offset (REG, 0)
|
|
|
|
# define CFI_POP(REG) \
|
|
cfi_adjust_cfa_offset (-4); \
|
|
cfi_restore (REG)
|
|
|
|
# define PUSH(REG) pushl REG; CFI_PUSH (REG)
|
|
# define POP(REG) popl REG; CFI_POP (REG)
|
|
|
|
# define PARMS 4
|
|
# define STR1 PARMS
|
|
# define STR2 STR1+4
|
|
# define LEN STR2+4
|
|
|
|
atom_text_section
|
|
ENTRY (__memrchr_sse2)
|
|
mov STR1(%esp), %ecx
|
|
movd STR2(%esp), %xmm1
|
|
mov LEN(%esp), %edx
|
|
|
|
sub $16, %edx
|
|
jbe L(length_less16)
|
|
|
|
punpcklbw %xmm1, %xmm1
|
|
add %edx, %ecx
|
|
punpcklbw %xmm1, %xmm1
|
|
|
|
movdqu (%ecx), %xmm0
|
|
pshufd $0, %xmm1, %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
|
|
pmovmskb %xmm0, %eax
|
|
test %eax, %eax
|
|
jnz L(exit_dispatch)
|
|
|
|
sub $64, %ecx
|
|
mov %ecx, %eax
|
|
and $15, %eax
|
|
jz L(loop_prolog)
|
|
|
|
lea 16(%ecx), %ecx
|
|
lea 16(%edx), %edx
|
|
sub %eax, %edx
|
|
and $-16, %ecx
|
|
|
|
.p2align 4
|
|
/* Loop start on aligned string. */
|
|
L(loop_prolog):
|
|
sub $64, %edx
|
|
jbe L(exit_loop)
|
|
|
|
movdqa 48(%ecx), %xmm0
|
|
pcmpeqb %xmm1, %xmm0
|
|
pmovmskb %xmm0, %eax
|
|
test %eax, %eax
|
|
jnz L(matches48)
|
|
|
|
movdqa 32(%ecx), %xmm2
|
|
pcmpeqb %xmm1, %xmm2
|
|
pmovmskb %xmm2, %eax
|
|
test %eax, %eax
|
|
jnz L(matches32)
|
|
|
|
movdqa 16(%ecx), %xmm3
|
|
pcmpeqb %xmm1, %xmm3
|
|
pmovmskb %xmm3, %eax
|
|
test %eax, %eax
|
|
jnz L(matches16)
|
|
|
|
movdqa (%ecx), %xmm4
|
|
pcmpeqb %xmm1, %xmm4
|
|
pmovmskb %xmm4, %eax
|
|
test %eax, %eax
|
|
jnz L(exit_dispatch)
|
|
|
|
sub $64, %ecx
|
|
sub $64, %edx
|
|
jbe L(exit_loop)
|
|
|
|
movdqa 48(%ecx), %xmm0
|
|
pcmpeqb %xmm1, %xmm0
|
|
pmovmskb %xmm0, %eax
|
|
test %eax, %eax
|
|
jnz L(matches48)
|
|
|
|
movdqa 32(%ecx), %xmm2
|
|
pcmpeqb %xmm1, %xmm2
|
|
pmovmskb %xmm2, %eax
|
|
test %eax, %eax
|
|
jnz L(matches32)
|
|
|
|
movdqa 16(%ecx), %xmm3
|
|
pcmpeqb %xmm1, %xmm3
|
|
pmovmskb %xmm3, %eax
|
|
test %eax, %eax
|
|
jnz L(matches16)
|
|
|
|
movdqa (%ecx), %xmm3
|
|
pcmpeqb %xmm1, %xmm3
|
|
pmovmskb %xmm3, %eax
|
|
test %eax, %eax
|
|
jnz L(exit_dispatch)
|
|
|
|
mov %ecx, %eax
|
|
and $63, %eax
|
|
test %eax, %eax
|
|
jz L(align64_loop)
|
|
|
|
lea 64(%ecx), %ecx
|
|
lea 64(%edx), %edx
|
|
and $-64, %ecx
|
|
sub %eax, %edx
|
|
|
|
.p2align 4
|
|
L(align64_loop):
|
|
sub $64, %ecx
|
|
sub $64, %edx
|
|
jbe L(exit_loop)
|
|
|
|
movdqa (%ecx), %xmm0
|
|
movdqa 16(%ecx), %xmm2
|
|
movdqa 32(%ecx), %xmm3
|
|
movdqa 48(%ecx), %xmm4
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm1, %xmm2
|
|
pcmpeqb %xmm1, %xmm3
|
|
pcmpeqb %xmm1, %xmm4
|
|
|
|
pmaxub %xmm3, %xmm0
|
|
pmaxub %xmm4, %xmm2
|
|
pmaxub %xmm0, %xmm2
|
|
pmovmskb %xmm2, %eax
|
|
|
|
test %eax, %eax
|
|
jz L(align64_loop)
|
|
|
|
pmovmskb %xmm4, %eax
|
|
test %eax, %eax
|
|
jnz L(matches48)
|
|
|
|
pmovmskb %xmm3, %eax
|
|
test %eax, %eax
|
|
jnz L(matches32)
|
|
|
|
movdqa 16(%ecx), %xmm2
|
|
|
|
pcmpeqb %xmm1, %xmm2
|
|
pcmpeqb (%ecx), %xmm1
|
|
|
|
pmovmskb %xmm2, %eax
|
|
test %eax, %eax
|
|
jnz L(matches16)
|
|
|
|
pmovmskb %xmm1, %eax
|
|
test %ah, %ah
|
|
jnz L(exit_dispatch_high)
|
|
mov %al, %dl
|
|
and $15 << 4, %dl
|
|
jnz L(exit_dispatch_8)
|
|
test $0x08, %al
|
|
jnz L(exit_4)
|
|
test $0x04, %al
|
|
jnz L(exit_3)
|
|
test $0x02, %al
|
|
jnz L(exit_2)
|
|
mov %ecx, %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_loop):
|
|
add $64, %edx
|
|
cmp $32, %edx
|
|
jbe L(exit_loop_32)
|
|
|
|
movdqa 48(%ecx), %xmm0
|
|
pcmpeqb %xmm1, %xmm0
|
|
pmovmskb %xmm0, %eax
|
|
test %eax, %eax
|
|
jnz L(matches48)
|
|
|
|
movdqa 32(%ecx), %xmm2
|
|
pcmpeqb %xmm1, %xmm2
|
|
pmovmskb %xmm2, %eax
|
|
test %eax, %eax
|
|
jnz L(matches32)
|
|
|
|
movdqa 16(%ecx), %xmm3
|
|
pcmpeqb %xmm1, %xmm3
|
|
pmovmskb %xmm3, %eax
|
|
test %eax, %eax
|
|
jnz L(matches16_1)
|
|
cmp $48, %edx
|
|
jbe L(return_null)
|
|
|
|
pcmpeqb (%ecx), %xmm1
|
|
pmovmskb %xmm1, %eax
|
|
test %eax, %eax
|
|
jnz L(matches0_1)
|
|
xor %eax, %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_loop_32):
|
|
movdqa 48(%ecx), %xmm0
|
|
pcmpeqb %xmm1, %xmm0
|
|
pmovmskb %xmm0, %eax
|
|
test %eax, %eax
|
|
jnz L(matches48_1)
|
|
cmp $16, %edx
|
|
jbe L(return_null)
|
|
|
|
pcmpeqb 32(%ecx), %xmm1
|
|
pmovmskb %xmm1, %eax
|
|
test %eax, %eax
|
|
jnz L(matches32_1)
|
|
xor %eax, %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(matches16):
|
|
lea 16(%ecx), %ecx
|
|
test %ah, %ah
|
|
jnz L(exit_dispatch_high)
|
|
mov %al, %dl
|
|
and $15 << 4, %dl
|
|
jnz L(exit_dispatch_8)
|
|
test $0x08, %al
|
|
jnz L(exit_4)
|
|
test $0x04, %al
|
|
jnz L(exit_3)
|
|
test $0x02, %al
|
|
jnz L(exit_2)
|
|
mov %ecx, %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(matches32):
|
|
lea 32(%ecx), %ecx
|
|
test %ah, %ah
|
|
jnz L(exit_dispatch_high)
|
|
mov %al, %dl
|
|
and $15 << 4, %dl
|
|
jnz L(exit_dispatch_8)
|
|
test $0x08, %al
|
|
jnz L(exit_4)
|
|
test $0x04, %al
|
|
jnz L(exit_3)
|
|
test $0x02, %al
|
|
jnz L(exit_2)
|
|
mov %ecx, %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(matches48):
|
|
lea 48(%ecx), %ecx
|
|
|
|
.p2align 4
|
|
L(exit_dispatch):
|
|
test %ah, %ah
|
|
jnz L(exit_dispatch_high)
|
|
mov %al, %dl
|
|
and $15 << 4, %dl
|
|
jnz L(exit_dispatch_8)
|
|
test $0x08, %al
|
|
jnz L(exit_4)
|
|
test $0x04, %al
|
|
jnz L(exit_3)
|
|
test $0x02, %al
|
|
jnz L(exit_2)
|
|
mov %ecx, %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_dispatch_8):
|
|
test $0x80, %al
|
|
jnz L(exit_8)
|
|
test $0x40, %al
|
|
jnz L(exit_7)
|
|
test $0x20, %al
|
|
jnz L(exit_6)
|
|
lea 4(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_dispatch_high):
|
|
mov %ah, %dh
|
|
and $15 << 4, %dh
|
|
jnz L(exit_dispatch_high_8)
|
|
test $0x08, %ah
|
|
jnz L(exit_12)
|
|
test $0x04, %ah
|
|
jnz L(exit_11)
|
|
test $0x02, %ah
|
|
jnz L(exit_10)
|
|
lea 8(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_dispatch_high_8):
|
|
test $0x80, %ah
|
|
jnz L(exit_16)
|
|
test $0x40, %ah
|
|
jnz L(exit_15)
|
|
test $0x20, %ah
|
|
jnz L(exit_14)
|
|
lea 12(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_2):
|
|
lea 1(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_3):
|
|
lea 2(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_4):
|
|
lea 3(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_6):
|
|
lea 5(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_7):
|
|
lea 6(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_8):
|
|
lea 7(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_10):
|
|
lea 9(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_11):
|
|
lea 10(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_12):
|
|
lea 11(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_14):
|
|
lea 13(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_15):
|
|
lea 14(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_16):
|
|
lea 15(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(matches0_1):
|
|
lea -64(%edx), %edx
|
|
|
|
test %ah, %ah
|
|
jnz L(exit_dispatch_1_high)
|
|
mov %al, %ah
|
|
and $15 << 4, %ah
|
|
jnz L(exit_dispatch_1_8)
|
|
test $0x08, %al
|
|
jnz L(exit_1_4)
|
|
test $0x04, %al
|
|
jnz L(exit_1_3)
|
|
test $0x02, %al
|
|
jnz L(exit_1_2)
|
|
add $0, %edx
|
|
jl L(return_null)
|
|
mov %ecx, %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(matches16_1):
|
|
lea -48(%edx), %edx
|
|
lea 16(%ecx), %ecx
|
|
|
|
test %ah, %ah
|
|
jnz L(exit_dispatch_1_high)
|
|
mov %al, %ah
|
|
and $15 << 4, %ah
|
|
jnz L(exit_dispatch_1_8)
|
|
test $0x08, %al
|
|
jnz L(exit_1_4)
|
|
test $0x04, %al
|
|
jnz L(exit_1_3)
|
|
test $0x02, %al
|
|
jnz L(exit_1_2)
|
|
add $0, %edx
|
|
jl L(return_null)
|
|
mov %ecx, %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(matches32_1):
|
|
lea -32(%edx), %edx
|
|
lea 32(%ecx), %ecx
|
|
|
|
test %ah, %ah
|
|
jnz L(exit_dispatch_1_high)
|
|
mov %al, %ah
|
|
and $15 << 4, %ah
|
|
jnz L(exit_dispatch_1_8)
|
|
test $0x08, %al
|
|
jnz L(exit_1_4)
|
|
test $0x04, %al
|
|
jnz L(exit_1_3)
|
|
test $0x02, %al
|
|
jnz L(exit_1_2)
|
|
add $0, %edx
|
|
jl L(return_null)
|
|
mov %ecx, %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(matches48_1):
|
|
lea -16(%edx), %edx
|
|
lea 48(%ecx), %ecx
|
|
|
|
.p2align 4
|
|
L(exit_dispatch_1):
|
|
test %ah, %ah
|
|
jnz L(exit_dispatch_1_high)
|
|
mov %al, %ah
|
|
and $15 << 4, %ah
|
|
jnz L(exit_dispatch_1_8)
|
|
test $0x08, %al
|
|
jnz L(exit_1_4)
|
|
test $0x04, %al
|
|
jnz L(exit_1_3)
|
|
test $0x02, %al
|
|
jnz L(exit_1_2)
|
|
add $0, %edx
|
|
jl L(return_null)
|
|
mov %ecx, %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_dispatch_1_8):
|
|
test $0x80, %al
|
|
jnz L(exit_1_8)
|
|
test $0x40, %al
|
|
jnz L(exit_1_7)
|
|
test $0x20, %al
|
|
jnz L(exit_1_6)
|
|
add $4, %edx
|
|
jl L(return_null)
|
|
lea 4(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_dispatch_1_high):
|
|
mov %ah, %al
|
|
and $15 << 4, %al
|
|
jnz L(exit_dispatch_1_high_8)
|
|
test $0x08, %ah
|
|
jnz L(exit_1_12)
|
|
test $0x04, %ah
|
|
jnz L(exit_1_11)
|
|
test $0x02, %ah
|
|
jnz L(exit_1_10)
|
|
add $8, %edx
|
|
jl L(return_null)
|
|
lea 8(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_dispatch_1_high_8):
|
|
test $0x80, %ah
|
|
jnz L(exit_1_16)
|
|
test $0x40, %ah
|
|
jnz L(exit_1_15)
|
|
test $0x20, %ah
|
|
jnz L(exit_1_14)
|
|
add $12, %edx
|
|
jl L(return_null)
|
|
lea 12(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_1_2):
|
|
add $1, %edx
|
|
jl L(return_null)
|
|
lea 1(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_1_3):
|
|
add $2, %edx
|
|
jl L(return_null)
|
|
lea 2(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_1_4):
|
|
add $3, %edx
|
|
jl L(return_null)
|
|
lea 3(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_1_6):
|
|
add $5, %edx
|
|
jl L(return_null)
|
|
lea 5(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_1_7):
|
|
add $6, %edx
|
|
jl L(return_null)
|
|
lea 6(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_1_8):
|
|
add $7, %edx
|
|
jl L(return_null)
|
|
lea 7(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_1_10):
|
|
add $9, %edx
|
|
jl L(return_null)
|
|
lea 9(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_1_11):
|
|
add $10, %edx
|
|
jl L(return_null)
|
|
lea 10(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_1_12):
|
|
add $11, %edx
|
|
jl L(return_null)
|
|
lea 11(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_1_14):
|
|
add $13, %edx
|
|
jl L(return_null)
|
|
lea 13(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_1_15):
|
|
add $14, %edx
|
|
jl L(return_null)
|
|
lea 14(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(exit_1_16):
|
|
add $15, %edx
|
|
jl L(return_null)
|
|
lea 15(%ecx), %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(return_null):
|
|
xor %eax, %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(length_less16_offset0):
|
|
mov %dl, %cl
|
|
pcmpeqb (%eax), %xmm1
|
|
|
|
mov $1, %edx
|
|
sal %cl, %edx
|
|
sub $1, %edx
|
|
|
|
mov %eax, %ecx
|
|
pmovmskb %xmm1, %eax
|
|
|
|
and %edx, %eax
|
|
test %eax, %eax
|
|
jnz L(exit_dispatch)
|
|
|
|
xor %eax, %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(length_less16):
|
|
punpcklbw %xmm1, %xmm1
|
|
add $16, %edx
|
|
je L(return_null)
|
|
punpcklbw %xmm1, %xmm1
|
|
|
|
mov %ecx, %eax
|
|
pshufd $0, %xmm1, %xmm1
|
|
|
|
and $15, %ecx
|
|
jz L(length_less16_offset0)
|
|
|
|
PUSH (%edi)
|
|
|
|
mov %cl, %dh
|
|
add %dl, %dh
|
|
and $-16, %eax
|
|
|
|
sub $16, %dh
|
|
ja L(length_less16_part2)
|
|
|
|
pcmpeqb (%eax), %xmm1
|
|
pmovmskb %xmm1, %edi
|
|
|
|
sar %cl, %edi
|
|
add %ecx, %eax
|
|
mov %dl, %cl
|
|
|
|
mov $1, %edx
|
|
sal %cl, %edx
|
|
sub $1, %edx
|
|
|
|
and %edx, %edi
|
|
test %edi, %edi
|
|
jz L(ret_null)
|
|
|
|
bsr %edi, %edi
|
|
add %edi, %eax
|
|
POP (%edi)
|
|
ret
|
|
|
|
CFI_PUSH (%edi)
|
|
|
|
.p2align 4
|
|
L(length_less16_part2):
|
|
movdqa 16(%eax), %xmm2
|
|
pcmpeqb %xmm1, %xmm2
|
|
pmovmskb %xmm2, %edi
|
|
|
|
mov %cl, %ch
|
|
|
|
mov %dh, %cl
|
|
mov $1, %edx
|
|
sal %cl, %edx
|
|
sub $1, %edx
|
|
|
|
and %edx, %edi
|
|
|
|
test %edi, %edi
|
|
jnz L(length_less16_part2_return)
|
|
|
|
pcmpeqb (%eax), %xmm1
|
|
pmovmskb %xmm1, %edi
|
|
|
|
mov %ch, %cl
|
|
sar %cl, %edi
|
|
test %edi, %edi
|
|
jz L(ret_null)
|
|
|
|
bsr %edi, %edi
|
|
add %edi, %eax
|
|
xor %ch, %ch
|
|
add %ecx, %eax
|
|
POP (%edi)
|
|
ret
|
|
|
|
CFI_PUSH (%edi)
|
|
|
|
.p2align 4
|
|
L(length_less16_part2_return):
|
|
bsr %edi, %edi
|
|
lea 16(%eax, %edi), %eax
|
|
POP (%edi)
|
|
ret
|
|
|
|
CFI_PUSH (%edi)
|
|
|
|
.p2align 4
|
|
L(ret_null):
|
|
xor %eax, %eax
|
|
POP (%edi)
|
|
ret
|
|
|
|
END (__memrchr_sse2)
|
|
#endif
|