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atomic_inc_32.S revision 1.1 
      1 /*	$NetBSD: atomic_inc_32.S,v 1.1 2014/09/03 19:34:25 matt Exp $	*/
      2 /*-
      3  * Copyright (c) 2008 The NetBSD Foundation, Inc.
      4  * All rights reserved.
      5  *
      6  * This code is derived from software contributed to The NetBSD Foundation
      7  * by Matt Thomas <matt (at) 3am-software.com>
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     20  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     21  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     28  * POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "atomic_op_asm.h"
     32 
     33 ENTRY_NP(_atomic_inc_32)
     34 1:	l.lwa	r11, 0(r3)		/* load old value */
     35 	l.addi	r5, r11, 1		/* calculate new value */
     36 	l.swa	0(r3), r5		/* try to store */
     37 	l.bnf	1b			/*   succeed? no, try again */
     38 	l.nop				/* -- delay slot -- */
     39 	l.jr	lr			/* return old value */
     40 	l.nop
     41 END(_atomic_inc_32)
     42 ATOMIC_OP_ALIAS(atomic_inc_32,_atomic_inc_32)
     43 ATOMIC_OP_ALIAS(atomic_inc_uint,_atomic_inc_32)
     44 ATOMIC_OP_ALIAS(atomic_inc_ulong,_atomic_inc_32)
     45 ATOMIC_OP_ALIAS(atomic_inc_ptr,_atomic_inc_32)
     46 STRONG_ALIAS(_atomic_inc_uint,_atomic_inc_32)
     47 STRONG_ALIAS(_atomic_inc_ulong,_atomic_inc_32)
     48 STRONG_ALIAS(_atomic_inc_ptr,_atomic_inc_32)
     49 
     50 ENTRY_NP(_atomic_inc_32_nv)
     51 1:	l.lwa	r5, 0(r3)		/* load old value */
     52 	l.addi	r11, r5, 1		/* calculate new value */
     53 	l.swa	0(r3), r11		/* try to store */
     54 	l.bnf	1b			/*   succeed? no, try again */
     55 	l.nop				/* -- delay slot -- */
     56 	l.jr	lr			/* return old value */
     57 	l.nop
     58 END(_atomic_inc_32_nv)
     59 ATOMIC_OP_ALIAS(atomic_inc_32_nv,_atomic_inc_32_nv)
     60 ATOMIC_OP_ALIAS(atomic_inc_uint_nv,_atomic_inc_32_nv)
     61 ATOMIC_OP_ALIAS(atomic_inc_ulong_nv,_atomic_inc_32_nv)
     62 ATOMIC_OP_ALIAS(atomic_inc_ptr_nv,_atomic_inc_32_nv)
     63 STRONG_ALIAS(_atomic_inc_uint_nv,_atomic_inc_32_nv)
     64 STRONG_ALIAS(_atomic_inc_ulong_nv,_atomic_inc_32_nv)
     65 STRONG_ALIAS(_atomic_inc_ptr_nv,_atomic_inc_32_nv)
     66