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https://github.com/torvalds/linux
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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>
80 lines
1.3 KiB
ArmAsm
80 lines
1.3 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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*/
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#include <linux/linkage.h>
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ENTRY_CFI(strlen)
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or r3,r0,7
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ld r2,[r3,-7]
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ld.a r6,[r3,-3]
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mov r4,0x01010101
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; uses long immediate
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#ifdef __LITTLE_ENDIAN__
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asl_s r1,r0,3
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btst_s r0,2
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asl r7,r4,r1
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ror r5,r4
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sub r1,r2,r7
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bic_s r1,r1,r2
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mov.eq r7,r4
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sub r12,r6,r7
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bic r12,r12,r6
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or.eq r12,r12,r1
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and r12,r12,r5
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brne r12,0,.Learly_end
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#else /* BIG ENDIAN */
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ror r5,r4
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btst_s r0,2
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mov_s r1,31
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sub3 r7,r1,r0
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sub r1,r2,r4
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bic_s r1,r1,r2
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bmsk r1,r1,r7
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sub r12,r6,r4
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bic r12,r12,r6
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bmsk.ne r12,r12,r7
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or.eq r12,r12,r1
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and r12,r12,r5
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brne r12,0,.Learly_end
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#endif /* ENDIAN */
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.Loop:
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ld_s r2,[r3,4]
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ld.a r6,[r3,8]
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; stall for load result
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sub r1,r2,r4
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bic_s r1,r1,r2
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sub r12,r6,r4
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bic r12,r12,r6
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or r12,r12,r1
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and r12,r12,r5
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breq r12,0,.Loop
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.Lend:
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and.f r1,r1,r5
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sub.ne r3,r3,4
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mov.eq r1,r12
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#ifdef __LITTLE_ENDIAN__
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sub_s r2,r1,1
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bic_s r2,r2,r1
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norm r1,r2
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sub_s r0,r0,3
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lsr_s r1,r1,3
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sub r0,r3,r0
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j_s.d [blink]
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sub r0,r0,r1
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#else /* BIG ENDIAN */
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lsr_s r1,r1,7
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mov.eq r2,r6
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bic_s r1,r1,r2
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norm r1,r1
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sub r0,r3,r0
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lsr_s r1,r1,3
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j_s.d [blink]
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add r0,r0,r1
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#endif /* ENDIAN */
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.Learly_end:
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b.d .Lend
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sub_s.ne r1,r1,r1
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END_CFI(strlen)
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