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70 lines
2.1 KiB
ArmAsm
70 lines
2.1 KiB
ArmAsm
/* $NetBSD: ctz.S,v 1.1 2014/09/03 19:34:25 matt Exp $ */
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/*-
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* Copyright (C) 2001 Martin J. Laubach <mjl@NetBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*----------------------------------------------------------------------*/
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#include <machine/asm.h>
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__RCSID("$NetBSD: ctz.S,v 1.1 2014/09/03 19:34:25 matt Exp $")
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ENTRY_NP(__ctzsi2)
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#ifdef _LP64
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l.extwz r3, r3
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#endif
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l.ff1 r11, r3
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l.addi r11, r11, -1
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l.jr lr
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l.nop
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END(__ctzsi2)
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ENTRY_NP(__ctzdi2)
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#ifdef _LP64
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l.ff1 r11, r3
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l.addi r11, r11, -1
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l.jr lr
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l.nop
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#else
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l.sfeqi r4, 0
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l.bf 1f
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l.nop
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l.ff1 r11, r4
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l.addi r11, r11, -1
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l.jr lr
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l.nop
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1: l.sfeqi r3, 0
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l.addi r12, r0, 64
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l.ff1 r11, r3
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l.addi r11, r11, 31
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l.cmov r11, r12, r11
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l.jr lr
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l.nop
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#endif
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END(__ctzdi2)
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