/* $NetBSD: atomic_cas_68000.S,v 1.6 2014/01/29 10:20:11 martin Exp $ */ /*- * Copyright (c) 2008 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Steve C. Woodford. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include <sys/ras.h> #include "atomic_op_asm.h" .text ENTRY(_atomic_cas_up) .hidden _C_LABEL(_atomic_cas_up) movl 4(%sp), %a0 /* Fetch ptr */ RAS_START_ASM_HIDDEN(_atomic_cas) movl (%a0), %d0 /* d0 = *ptr */ cmpl 8(%sp), %d0 /* Same as old? */ jne 1f /* Nope */ movl 12(%sp), (%a0) /* *ptr = new */ RAS_END_ASM_HIDDEN(_atomic_cas) 1: rts END(_atomic_cas_up) ENTRY(_atomic_cas_16_up) .hidden _C_LABEL(_atomic_cas_16_up) movl 4(%sp), %a0 /* Fetch ptr */ RAS_START_ASM_HIDDEN(_atomic_cas_16) movw (%a0), %d0 /* d0 = *ptr */ cmpw 8(%sp), %d0 /* Same as old? */ jne 1f /* Nope */ movw 12(%sp), (%a0) /* *ptr = new */ RAS_END_ASM_HIDDEN(_atomic_cas_16) 1: rts END(_atomic_cas_16_up) ENTRY(_atomic_cas_8_up) .hidden _C_LABEL(_atomic_cas_8_up) movl 4(%sp), %a0 /* Fetch ptr */ RAS_START_ASM_HIDDEN(_atomic_cas_8) movb (%a0), %d0 /* d0 = *ptr */ cmpb 8(%sp), %d0 /* Same as old? */ jne 1f /* Nope */ movb 12(%sp), (%a0) /* *ptr = new */ RAS_END_ASM_HIDDEN(_atomic_cas_8) 1: rts END(_atomic_cas_8_up) |