a7c139c0af
Update libc assembly code to use macros that work on both o32 and n64. Merge string functions from NetBSD. The changes are from http://svn.freebsd.org/base/user/jmallett/octeon Approved by: rrs (mentor), jmallett
60 lines
2.2 KiB
ArmAsm
60 lines
2.2 KiB
ArmAsm
/* $NetBSD: ffs.S,v 1.2 2009/12/14 00:39:00 matt Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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#if defined(LIBC_SCCS) && !defined(lint)
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ASMSTR("from: @(#)ffs.s 8.1 (Berkeley) 6/4/93")
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ASMSTR("$NetBSD: ffs.S,v 1.2 2009/12/14 00:39:00 matt Exp $")
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#endif /* LIBC_SCCS and not lint */
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#ifdef __ABICALLS__
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.abicalls
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#endif
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/* bit = ffs(value) */
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LEAF(ffs)
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move v0, zero
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beq a0, zero, done
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1:
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and v1, a0, 1 # bit set?
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addu v0, v0, 1
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srl a0, a0, 1
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beq v1, zero, 1b # no, continue
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done:
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j ra
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END(ffs)
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