forked from Minki/linux
d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
81 lines
1.3 KiB
ArmAsm
81 lines
1.3 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
ENTRY_CFI(strlen)
|
|
or r3,r0,7
|
|
ld r2,[r3,-7]
|
|
ld.a r6,[r3,-3]
|
|
mov r4,0x01010101
|
|
; uses long immediate
|
|
#ifdef __LITTLE_ENDIAN__
|
|
asl_s r1,r0,3
|
|
btst_s r0,2
|
|
asl r7,r4,r1
|
|
ror r5,r4
|
|
sub r1,r2,r7
|
|
bic_s r1,r1,r2
|
|
mov.eq r7,r4
|
|
sub r12,r6,r7
|
|
bic r12,r12,r6
|
|
or.eq r12,r12,r1
|
|
and r12,r12,r5
|
|
brne r12,0,.Learly_end
|
|
#else /* BIG ENDIAN */
|
|
ror r5,r4
|
|
btst_s r0,2
|
|
mov_s r1,31
|
|
sub3 r7,r1,r0
|
|
sub r1,r2,r4
|
|
bic_s r1,r1,r2
|
|
bmsk r1,r1,r7
|
|
sub r12,r6,r4
|
|
bic r12,r12,r6
|
|
bmsk.ne r12,r12,r7
|
|
or.eq r12,r12,r1
|
|
and r12,r12,r5
|
|
brne r12,0,.Learly_end
|
|
#endif /* ENDIAN */
|
|
|
|
.Loop:
|
|
ld_s r2,[r3,4]
|
|
ld.a r6,[r3,8]
|
|
; stall for load result
|
|
sub r1,r2,r4
|
|
bic_s r1,r1,r2
|
|
sub r12,r6,r4
|
|
bic r12,r12,r6
|
|
or r12,r12,r1
|
|
and r12,r12,r5
|
|
breq r12,0,.Loop
|
|
.Lend:
|
|
and.f r1,r1,r5
|
|
sub.ne r3,r3,4
|
|
mov.eq r1,r12
|
|
#ifdef __LITTLE_ENDIAN__
|
|
sub_s r2,r1,1
|
|
bic_s r2,r2,r1
|
|
norm r1,r2
|
|
sub_s r0,r0,3
|
|
lsr_s r1,r1,3
|
|
sub r0,r3,r0
|
|
j_s.d [blink]
|
|
sub r0,r0,r1
|
|
#else /* BIG ENDIAN */
|
|
lsr_s r1,r1,7
|
|
mov.eq r2,r6
|
|
bic_s r1,r1,r2
|
|
norm r1,r1
|
|
sub r0,r3,r0
|
|
lsr_s r1,r1,3
|
|
j_s.d [blink]
|
|
add r0,r0,r1
|
|
#endif /* ENDIAN */
|
|
.Learly_end:
|
|
b.d .Lend
|
|
sub_s.ne r1,r1,r1
|
|
END_CFI(strlen)
|