1/* $NetBSD: atomic_cas_up.S,v 1.7 2014/03/04 03:36:24 matt 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 <machine/asm.h> 34 35ENTRY(_atomic_cas_up) 36 .hidden _C_LABEL(_atomic_cas_up) 37 mov r3, r0 38 .align 0 39RAS_START_ASM_HIDDEN(_atomic_cas) 40 ldr r0, [r3] 41 cmp r0, r1 42#if defined(__thumb__) 43 beq 1f 44#else 45 streq r2, [r3] 46#endif 47 .align 0 48RAS_END_ASM_HIDDEN(_atomic_cas) 491: RET 50END(_atomic_cas_up) 51 52#if defined(__HAVE_ASM_ATOMIC_CAS_64_UP) 53ARM_ENTRY(_atomic_cas_64_up) 54 push {r4-r5} 55 mov ip, r0 56 ldrd r4, r5, [sp, #8] 57 .align 0 58RAS_START_ASM_HIDDEN(_atomic_cas_64) 59 ldrd r0, r1, [ip] 60 cmp r0, r2 61 cmpeq r1, r3 62 strdeq r4, r5, [ip] 63 .align 0 64RAS_END_ASM_HIDDEN(_atomic_cas_64) 651: pop {r4-r5} 66 bx lr 67END(_atomic_cas_64_up) 68#endif /* __HAVE_ASM_ATOMIC_64_UP */ 69 70ENTRY(_atomic_cas_16_up) 71 mov r3, r0 72 .align 0 73RAS_START_ASM_HIDDEN(_atomic_cas_16) 74 ldrh r0, [r3] 75 cmp r0, r1 76#if defined(__thumb__) 77 beq 1f 78#else 79 strheq r2, [r3] 80#endif 81 .align 0 82RAS_END_ASM_HIDDEN(_atomic_cas_16) 831: RET 84END(_atomic_cas_16_up) 85 86ENTRY(_atomic_cas_8_up) 87 mov r3, r0 88 .align 0 89RAS_START_ASM_HIDDEN(_atomic_cas_8) 90 ldrb r0, [r3] 91 cmp r0, r1 92#if defined(__thumb__) 93 beq 1f 94#else 95 strbeq r2, [r3] 96#endif 97 .align 0 98RAS_END_ASM_HIDDEN(_atomic_cas_8) 991: RET 100END(_atomic_cas_8_up) 101