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      1 /*	$NetBSD: atomic_add_32.S,v 1.1 2014/09/03 19:34:25 matt Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matt Thomas of 3am Software Foundry.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include "atomic_op_asm.h"
     33 
     34 ENTRY_NP(_atomic_sub_32)
     35 	l.sub	r4, r0, r4		/* negate */
     36 	/* FALLTHROUGH */
     37 ENTRY_NP(_atomic_add_32)
     38 1:	l.lwa	r11, 0(r3)		/* load old value */
     39 	l.add	r5, r11, r4		/* calculate new value */
     40 	l.swa	0(r3), r5		/* try to store */
     41 	l.bnf	1b			/*   succeed? no, try again */
     42 	l.nop				/* -- delay slot -- */
     43 	l.jr	lr			/* return old value */
     44 	l.nop
     45 END(_atomic_add_32)
     46 END(_atomic_sub_32)
     47 
     48 ATOMIC_OP_ALIAS(atomic_add_32,_atomic_add_32)
     49 ATOMIC_OP_ALIAS(atomic_add_int,_atomic_add_32)
     50 ATOMIC_OP_ALIAS(atomic_add_long,_atomic_add_32)
     51 ATOMIC_OP_ALIAS(atomic_add_ptr,_atomic_add_32)
     52 CRT_ALIAS(__sync_fetch_and_add_4,_atomic_add_32)
     53 CRT_ALIAS(__atomic_fetch_add_4,_atomic_add_32)
     54 STRONG_ALIAS(_atomic_add_int,_atomic_add_32)
     55 STRONG_ALIAS(_atomic_add_long,_atomic_add_32)
     56 STRONG_ALIAS(_atomic_add_ptr,_atomic_add_32)
     57 
     58 ATOMIC_OP_ALIAS(atomic_sub_32,_atomic_sub_32)
     59 ATOMIC_OP_ALIAS(atomic_sub_int,_atomic_sub_32)
     60 ATOMIC_OP_ALIAS(atomic_sub_long,_atomic_sub_32)
     61 ATOMIC_OP_ALIAS(atomic_sub_ptr,_atomic_sub_32)
     62 CRT_ALIAS(__sync_fetch_and_sub_4,_atomic_sub_32)
     63 CRT_ALIAS(__atomic_fetch_sub_4,_atomic_sub_32)
     64 STRONG_ALIAS(_atomic_sub_int,_atomic_sub_32)
     65 STRONG_ALIAS(_atomic_sub_long,_atomic_sub_32)
     66 STRONG_ALIAS(_atomic_sub_ptr,_atomic_sub_32)
     67 
     68 ENTRY_NP(_atomic_sub_32_nv)
     69 	l.sub	r4, r0, r4		/* negate */
     70 	/* FALLTHROUGH */
     71 ENTRY_NP(_atomic_add_32_nv)
     72 1:	l.lwa	r5, 0(r3)		/* load old value */
     73 	l.add	r11, r5, r4		/* calculate new value */
     74 	l.swa	0(r3), r11		/* try to store */
     75 	l.bnf	1b			/*   succeed? no, try again */
     76 	l.nop				/* -- delay slot -- */
     77 	l.jr	lr			/* return old value */
     78 	l.nop
     79 END(_atomic_add_32_nv)
     80 END(_atomic_sub_32_nv)
     81 ATOMIC_OP_ALIAS(atomic_add_32_nv,_atomic_add_32_nv)
     82 ATOMIC_OP_ALIAS(atomic_add_int_nv,_atomic_add_32_nv)
     83 ATOMIC_OP_ALIAS(atomic_add_long_nv,_atomic_add_32_nv)
     84 ATOMIC_OP_ALIAS(atomic_add_ptr_nv,_atomic_add_32_nv)
     85 CRT_ALIAS(__sync_add_and_fetch_4,_atomic_add_32_nv)
     86 STRONG_ALIAS(_atomic_add_int_nv,_atomic_add_32_nv)
     87 STRONG_ALIAS(_atomic_add_long_nv,_atomic_add_32_nv)
     88 STRONG_ALIAS(_atomic_add_ptr_nv,_atomic_add_32_nv)
     89 
     90 ATOMIC_OP_ALIAS(atomic_sub_32_nv,_atomic_sub_32_nv)
     91 ATOMIC_OP_ALIAS(atomic_sub_int_nv,_atomic_sub_32_nv)
     92 ATOMIC_OP_ALIAS(atomic_sub_long_nv,_atomic_sub_32_nv)
     93 ATOMIC_OP_ALIAS(atomic_sub_ptr_nv,_atomic_sub_32_nv)
     94 CRT_ALIAS(__sync_sub_and_fetch_4,_atomic_sub_32_nv)
     95 STRONG_ALIAS(_atomic_sub_int_nv,_atomic_sub_32_nv)
     96 STRONG_ALIAS(_atomic_sub_long_nv,_atomic_sub_32_nv)
     97 STRONG_ALIAS(_atomic_sub_ptr_nv,_atomic_sub_32_nv)
     98