11.5Sskrll/* $NetBSD: atomic_xor_32.S,v 1.5 2021/07/28 07:32:20 skrll Exp $ */ 21.1Smatt/*- 31.1Smatt * Copyright (c) 2008 The NetBSD Foundation, Inc. 41.1Smatt * All rights reserved. 51.1Smatt * 61.1Smatt * This code is derived from software contributed to The NetBSD Foundation 71.1Smatt * by Matt Thomas <matt@3am-software.com> 81.1Smatt * 91.1Smatt * Redistribution and use in source and binary forms, with or without 101.1Smatt * modification, are permitted provided that the following conditions 111.1Smatt * are met: 121.1Smatt * 1. Redistributions of source code must retain the above copyright 131.1Smatt * notice, this list of conditions and the following disclaimer. 141.1Smatt * 2. Redistributions in binary form must reproduce the above copyright 151.1Smatt * notice, this list of conditions and the following disclaimer in the 161.1Smatt * documentation and/or other materials provided with the distribution. 171.1Smatt * 181.1Smatt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 191.1Smatt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 201.1Smatt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 211.1Smatt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 221.1Smatt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 231.1Smatt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 241.1Smatt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 251.1Smatt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 261.1Smatt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 271.1Smatt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 281.1Smatt * POSSIBILITY OF SUCH DAMAGE. 291.1Smatt */ 301.1Smatt 311.1Smatt#include "atomic_op_asm.h" 321.1Smatt 331.4Sskrll#if defined(_ARM_ARCH_6) 341.1Smatt 351.1SmattENTRY_NP(_atomic_xor_32) 361.1Smatt mov ip, r0 371.1Smatt1: ldrex r0, [ip] /* load old value (to be returned) */ 381.1Smatt eors r3, r0, r1 /* calculate new value */ 391.1Smatt strex r2, r3, [ip] /* try to store */ 401.1Smatt cmp r2, #0 /* succeed? */ 411.1Smatt bne 1b /* no, try again */ 421.1Smatt RET /* return old value */ 431.1SmattEND(_atomic_xor_32) 441.1Smatt 451.1SmattATOMIC_OP_ALIAS(atomic_xor_32,_atomic_xor_32) 461.1SmattATOMIC_OP_ALIAS(atomic_xor_uint,_atomic_xor_32) 471.1SmattATOMIC_OP_ALIAS(atomic_xor_ulong,_atomic_xor_32) 481.3SjoergCRT_ALIAS(__atomic_fetch_xor_4,_atomic_xor_32) 491.1SmattSTRONG_ALIAS(_atomic_xor_uint,_atomic_xor_32) 501.1SmattSTRONG_ALIAS(_atomic_xor_ulong,_atomic_xor_32) 511.1Smatt 521.5SskrllENTRY_NP(__sync_fetch_and_xor_4) 531.5Sskrll push {r4, lr} 541.5Sskrll DMB 551.5Sskrll bl _atomic_xor_32 561.5Sskrll DMB 571.5Sskrll pop {r4, pc} 581.5SskrllEND(__sync_fetch_and_xor_4) 591.5Sskrll 601.1SmattENTRY_NP(_atomic_xor_32_nv) 611.1Smatt mov ip, r0 /* need r0 for return value */ 621.1Smatt1: ldrex r0, [ip] /* load old value */ 631.1Smatt eors r0, r0, r1 /* calculate new value (return value) */ 641.1Smatt strex r2, r0, [ip] /* try to store */ 651.1Smatt cmp r2, #0 /* succeed? */ 661.1Smatt bne 1b /* no, try again? */ 671.1Smatt RET /* return new value */ 681.1SmattEND(_atomic_xor_32_nv) 691.1Smatt 701.1SmattATOMIC_OP_ALIAS(atomic_xor_32_nv,_atomic_xor_32_nv) 711.1SmattATOMIC_OP_ALIAS(atomic_xor_uint_nv,_atomic_xor_32_nv) 721.1SmattATOMIC_OP_ALIAS(atomic_xor_ulong_nv,_atomic_xor_32_nv) 731.1SmattSTRONG_ALIAS(_atomic_xor_uint_nv,_atomic_xor_32_nv) 741.1SmattSTRONG_ALIAS(_atomic_xor_ulong_nv,_atomic_xor_32_nv) 751.1Smatt 761.5SskrllENTRY_NP(__sync_xor_and_fetch_4) 771.5Sskrll push {r4, lr} 781.5Sskrll DMB 791.5Sskrll bl _atomic_xor_32_nv 801.5Sskrll DMB 811.5Sskrll pop {r4, pc} 821.5SskrllEND(__sync_xor_and_fetch_4) 831.5Sskrll 841.5Sskrll 851.1Smatt#endif /* _ARM_ARCH_6 */ 86