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Annotation of src/common/lib/libc/arch/m68k/atomic/atomic_cas.S, Revision 1.4

1.4     ! martin      1: /*     $NetBSD: atomic_cas.S,v 1.3 2008/02/10 13:40:31 ad Exp $        */
1.2       ad          2:
                      3: /*-
1.3       ad          4:  * Copyright (c) 2007, 2008 The NetBSD Foundation, Inc.
1.2       ad          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: ENTRY_NOPROFILE(_atomic_cas_32)
                     37:        movl    %sp@(4), %a0
                     38:        movl    %sp@(8), %d0
                     39:        movl    %sp@(12), %d1
                     40:        casl    %d0, %d1, %a0@
                     41:        /* %d0 now contains the old value */
                     42:        movl    %d0, %a0        /* pointers return also in %a0 */
                     43:        rts
1.3       ad         44:
1.2       ad         45: ATOMIC_OP_ALIAS(atomic_cas_32,_atomic_cas_32)
                     46: ATOMIC_OP_ALIAS(atomic_cas_uint,_atomic_cas_32)
                     47: STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32)
                     48: ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_32)
                     49: STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_32)
                     50: ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_32)
                     51: STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_32)
1.3       ad         52:
                     53: ATOMIC_OP_ALIAS(atomic_cas_32_ni,_atomic_cas_32)
                     54: STRONG_ALIAS(_atomic_cas_32_ni,_atomic_cas_32)
                     55: ATOMIC_OP_ALIAS(atomic_cas_uint_ni,_atomic_cas_32)
                     56: STRONG_ALIAS(_atomic_cas_uint_ni,_atomic_cas_32)
                     57: ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_32)
                     58: STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_32)
                     59: ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_32)
                     60: STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_32)