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atomic_inc.S revision 1.2.8.2 
      1 /*	$NetBSD: atomic_inc.S,v 1.2.8.2 2008/06/04 02:02:57 yamt Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2007 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      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 	.text
     35 
     36 LEAF(_atomic_inc_32, 1)
     37 1:	ldl_l	t1, 0(a0)
     38 	addl	t1, 1, t2
     39 	stl_c	t2, 0(a0)
     40 	beq	t2, 2f
     41 	RET
     42 2:	br	1b
     43 	END(_atomic_inc_32)
     44 ATOMIC_OP_ALIAS(atomic_inc_32,_atomic_inc_32)
     45 ATOMIC_OP_ALIAS(atomic_inc_uint,_atomic_inc_32)
     46 STRONG_ALIAS(_atomic_inc_uint,_atomic_inc_32)
     47 
     48 LEAF(_atomic_inc_32_nv, 1)
     49 1:	ldl_l	t1, 0(a0)
     50 	addl	t1, 1, t2
     51 	mov	t2, v0
     52 	stl_c	t2, 0(a0)
     53 	beq	t2, 2f
     54 	RET
     55 2:	br	1b
     56 	END(_atomic_inc_32_nv)
     57 ATOMIC_OP_ALIAS(atomic_inc_32_nv,_atomic_inc_32_nv)
     58 ATOMIC_OP_ALIAS(atomic_inc_uint_nv,_atomic_inc_32_nv)
     59 STRONG_ALIAS(_atomic_inc_uint_nv,_atomic_inc_32_nv)
     60 
     61 LEAF(_atomic_inc_64, 1)
     62 1:	ldq_l	t1, 0(a0)
     63 	addq	t1, 1, t2
     64 	stq_c	t2, 0(a0)
     65 	beq	t2, 2f
     66 	RET
     67 2:	br	1b
     68 	END(_atomic_inc_64)
     69 ATOMIC_OP_ALIAS(atomic_inc_64,_atomic_inc_64)
     70 ATOMIC_OP_ALIAS(atomic_inc_ulong,_atomic_inc_64)
     71 STRONG_ALIAS(_atomic_inc_ulong,_atomic_inc_64)
     72 ATOMIC_OP_ALIAS(atomic_inc_ptr,_atomic_inc_64)
     73 STRONG_ALIAS(_atomic_inc_ptr,_atomic_inc_64)
     74 
     75 LEAF(_atomic_inc_64_nv, 1)
     76 1:	ldq_l	t1, 0(a0)
     77 	addq	t1, 1, t2
     78 	mov	t2, v0
     79 	stq_c	t2, 0(a0)
     80 	beq	t2, 2f
     81 	RET
     82 2:	br	1b
     83 	END(_atomic_inc_64_nv)
     84 ATOMIC_OP_ALIAS(atomic_inc_64_nv,_atomic_inc_64_nv)
     85 ATOMIC_OP_ALIAS(atomic_inc_ulong_nv,_atomic_inc_64_nv)
     86 STRONG_ALIAS(_atomic_inc_ulong_nv,_atomic_inc_64_nv)
     87 ATOMIC_OP_ALIAS(atomic_inc_ptr_nv,_atomic_inc_64_nv)
     88 STRONG_ALIAS(_atomic_inc_ptr_nv,_atomic_inc_64_nv)
     89