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strrchr.S revision 1.4.12.2 
      1  1.4.12.1  martin /*	$NetBSD: strrchr.S,v 1.4.12.2 2020/04/21 19:37:44 martin 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  1.4.12.1  martin 	ASMSTR("$NetBSD: strrchr.S,v 1.4.12.2 2020/04/21 19:37:44 martin Exp $")
     40       1.1     dsl #endif /* LIBC_SCCS and not lint */
     41       1.1     dsl 
     42       1.4   joerg #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