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strrchr.S revision 1.3.4.1 
      1  1.3.4.1  bouyer /*	$NetBSD: strrchr.S,v 1.3.4.1 2017/04/21 16:50:42 bouyer Exp $	*/
      2      1.1     dsl 
      3      1.1     dsl /*-
      4      1.1     dsl  * Copyright (c) 1991, 1993
      5      1.1     dsl  *	The Regents of the University of California.  All rights reserved.
      6      1.1     dsl  *
      7      1.1     dsl  * This code is derived from software contributed to Berkeley by
      8      1.1     dsl  * Ralph Campbell.
      9      1.1     dsl  *
     10      1.1     dsl  * Redistribution and use in source and binary forms, with or without
     11      1.1     dsl  * modification, are permitted provided that the following conditions
     12      1.1     dsl  * are met:
     13      1.1     dsl  * 1. Redistributions of source code must retain the above copyright
     14      1.1     dsl  *    notice, this list of conditions and the following disclaimer.
     15      1.1     dsl  * 2. Redistributions in binary form must reproduce the above copyright
     16      1.1     dsl  *    notice, this list of conditions and the following disclaimer in the
     17      1.1     dsl  *    documentation and/or other materials provided with the distribution.
     18      1.1     dsl  * 3. Neither the name of the University nor the names of its contributors
     19      1.1     dsl  *    may be used to endorse or promote products derived from this software
     20      1.1     dsl  *    without specific prior written permission.
     21      1.1     dsl  *
     22      1.1     dsl  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23      1.1     dsl  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24      1.1     dsl  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25      1.1     dsl  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26      1.1     dsl  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27      1.1     dsl  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28      1.1     dsl  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29      1.1     dsl  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30      1.1     dsl  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31      1.1     dsl  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32      1.1     dsl  * SUCH DAMAGE.
     33      1.1     dsl  */
     34      1.1     dsl 
     35      1.1     dsl #include <mips/asm.h>
     36      1.1     dsl 
     37      1.1     dsl #if defined(LIBC_SCCS) && !defined(lint)
     38      1.1     dsl 	ASMSTR("from: @(#)rindex.s	8.1 (Berkeley) 6/4/93")
     39  1.3.4.1  bouyer 	ASMSTR("$NetBSD: strrchr.S,v 1.3.4.1 2017/04/21 16:50:42 bouyer Exp $")
     40      1.1     dsl #endif /* LIBC_SCCS and not lint */
     41      1.1     dsl 
     42  1.3.4.1  bouyer #ifdef __mips_abicalls
     43      1.1     dsl 	.abicalls
     44      1.1     dsl #endif
     45      1.1     dsl 
     46      1.1     dsl LEAF(strrchr)
     47      1.1     dsl XLEAF(rindex)
     48      1.3    matt 	and	a1, 0xff		# limit to byte value
     49      1.1     dsl 	move	v0, zero		# default if not found
     50      1.1     dsl 1:
     51      1.1     dsl 	lbu	a3, 0(a0)		# get a byte
     52      1.2    matt 	PTR_ADDU a0, a0, 1
     53      1.1     dsl 	bne	a3, a1, 2f
     54      1.2    matt 	PTR_SUBU v0, a0, 1		# save address of last match
     55      1.1     dsl 2:
     56      1.1     dsl 	bne	a3, zero, 1b		# continue if not end
     57      1.1     dsl 	j	ra
     58      1.1     dsl END(strrchr)
     59