1/* $NetBSD: atomic_cas_68000.S,v 1.6 2014/01/29 10:20:11 martin Exp $ */ 2 3/*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Steve C. Woodford. 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 <sys/ras.h> 33#include "atomic_op_asm.h" 34 35 .text 36 37ENTRY(_atomic_cas_up) 38 .hidden _C_LABEL(_atomic_cas_up) 39 40 movl 4(%sp), %a0 /* Fetch ptr */ 41 42RAS_START_ASM_HIDDEN(_atomic_cas) 43 movl (%a0), %d0 /* d0 = *ptr */ 44 cmpl 8(%sp), %d0 /* Same as old? */ 45 jne 1f /* Nope */ 46 movl 12(%sp), (%a0) /* *ptr = new */ 47RAS_END_ASM_HIDDEN(_atomic_cas) 481: rts 49END(_atomic_cas_up) 50 51ENTRY(_atomic_cas_16_up) 52 .hidden _C_LABEL(_atomic_cas_16_up) 53 54 movl 4(%sp), %a0 /* Fetch ptr */ 55 56RAS_START_ASM_HIDDEN(_atomic_cas_16) 57 movw (%a0), %d0 /* d0 = *ptr */ 58 cmpw 8(%sp), %d0 /* Same as old? */ 59 jne 1f /* Nope */ 60 movw 12(%sp), (%a0) /* *ptr = new */ 61RAS_END_ASM_HIDDEN(_atomic_cas_16) 621: rts 63END(_atomic_cas_16_up) 64 65 66ENTRY(_atomic_cas_8_up) 67 .hidden _C_LABEL(_atomic_cas_8_up) 68 69 movl 4(%sp), %a0 /* Fetch ptr */ 70 71RAS_START_ASM_HIDDEN(_atomic_cas_8) 72 movb (%a0), %d0 /* d0 = *ptr */ 73 cmpb 8(%sp), %d0 /* Same as old? */ 74 jne 1f /* Nope */ 75 movb 12(%sp), (%a0) /* *ptr = new */ 76RAS_END_ASM_HIDDEN(_atomic_cas_8) 771: rts 78END(_atomic_cas_8_up) 79