src/common/lib/libc/arch/mips/string/strchr.S - view

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Revision 1.4, Tue May 26 06:55:08 2015 UTC (8 years, 10 months ago) by matt
Branch: MAIN
CVS Tags: pgoyette-localcount-base, pgoyette-localcount-20170107, pgoyette-localcount-20161104, pgoyette-localcount-20160806, pgoyette-localcount-20160726, localcount-20160914, bouyer-socketcan-base
Branch point for: pgoyette-localcount, bouyer-socketcan
Changes since 1.3: +3 -2 lines

force 2nd to argument to unsigned byte value.
(found by t_strchr and t_strrchr tests)

/*	$NetBSD: strchr.S,v 1.4 2015/05/26 06:55:08 matt Exp $	*/

/*-
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Ralph Campbell.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <mips/asm.h>

#if defined(LIBC_SCCS) && !defined(lint)
	ASMSTR("from: @(#)index.s	8.1 (Berkeley) 6/4/93")
	ASMSTR("$NetBSD: strchr.S,v 1.4 2015/05/26 06:55:08 matt Exp $")
#endif /* LIBC_SCCS and not lint */

#ifdef __ABICALLS__
	.abicalls
#endif

LEAF(strchr)
XLEAF(index)
	and	a1, 0xff		# limit to byte value
1:
	lbu	a2, 0(a0)		# get a byte
	PTR_ADDU a0, 1
	beq	a2, a1, fnd
	bne	a2, zero, 1b
notfnd:
	move	v0, zero
	j	ra
fnd:
	PTR_SUBU v0, a0, 1
	j	ra
END(strchr)