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Annotation of src/common/lib/libc/arch/m68k/atomic/atomic_add.S, Revision 1.7

1.7     ! martin      1: /*     $NetBSD: atomic_add.S,v 1.6 2013/07/16 23:24:18 matt Exp $      */
1.2       ad          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:        .align  2
                     36:
1.4       chs        37: ENTRY(_atomic_add_32)
1.5       matt       38:        movl    4(%sp), %a0
                     39:        movl    8(%sp), %d0
1.6       matt       40:        addl    %d0, (%a0)
1.2       ad         41:        rts
1.6       matt       42: END(_atomic_add_32)
1.2       ad         43: ATOMIC_OP_ALIAS(atomic_add_32,_atomic_add_32)
                     44: ATOMIC_OP_ALIAS(atomic_add_int,_atomic_add_32)
                     45: STRONG_ALIAS(_atomic_add_int,_atomic_add_32)
                     46: ATOMIC_OP_ALIAS(atomic_add_long,_atomic_add_32)
                     47: STRONG_ALIAS(_atomic_add_long,_atomic_add_32)
                     48: ATOMIC_OP_ALIAS(atomic_add_ptr,_atomic_add_32)
                     49: STRONG_ALIAS(_atomic_add_ptr,_atomic_add_32)
                     50:
1.4       chs        51: ENTRY(_atomic_add_32_nv)
1.5       matt       52:        movl    4(%sp), %a0
                     53: 1:     movl    (%a0), %d0
1.2       ad         54:        movl    %d0, %d1
1.5       matt       55:        addl    8(%sp), %d0
1.6       matt       56:        casl    %d1, %d0, (%a0)
1.2       ad         57:        bne     1b
                     58:        movl    %d0, %a0        /* pointers return also in %a0 */
                     59:        rts
1.6       matt       60: END(_atomic_add_32_nv)
                     61:
1.2       ad         62: ATOMIC_OP_ALIAS(atomic_add_32_nv,_atomic_add_32_nv)
                     63: ATOMIC_OP_ALIAS(atomic_add_int_nv,_atomic_add_32_nv)
                     64: STRONG_ALIAS(_atomic_add_int_nv,_atomic_add_32_nv)
                     65: ATOMIC_OP_ALIAS(atomic_add_long_nv,_atomic_add_32_nv)
                     66: STRONG_ALIAS(_atomic_add_long_nv,_atomic_add_32_nv)
                     67: ATOMIC_OP_ALIAS(atomic_add_ptr_nv,_atomic_add_32_nv)
                     68: STRONG_ALIAS(_atomic_add_ptr_nv,_atomic_add_32_nv)
1.7     ! martin     69: STRONG_ALIAS(__sync_add_and_fetch_4,_atomic_add_32_nv)
        !            70:
        !            71: ENTRY(_atomic_add_16_nv)
        !            72:        movl    4(%sp), %a0
        !            73: 1:     movw    (%a0), %d0
        !            74:        movw    %d0, %d1
        !            75:        addw    8(%sp), %d0
        !            76:        casw    %d1, %d0, (%a0)
        !            77:        bne     1b
        !            78:        rts
        !            79: END(_atomic_add_16_nv)
        !            80:
        !            81: STRONG_ALIAS(__sync_add_and_fetch_2,_atomic_add_16_nv)
        !            82:
        !            83: ENTRY(_atomic_add_8_nv)
        !            84:        movl    4(%sp), %a0
        !            85: 1:     movb    (%a0), %d0
        !            86:        movb    %d0, %d1
        !            87:        addb    8(%sp), %d0
        !            88:        casb    %d1, %d0, (%a0)
        !            89:        bne     1b
        !            90:        rts
        !            91: END(_atomic_add_8_nv)
        !            92:
        !            93: STRONG_ALIAS(__sync_add_and_fetch_1,_atomic_add_8_nv)