1*18ec38eaSchs/* $NetBSD: strcmp.S,v 1.7 2013/09/07 19:06:29 chs Exp $ */ 237c9f0a6Schristos 337c9f0a6Schristos/*- 437c9f0a6Schristos * Copyright (c) 1997 The NetBSD Foundation, Inc. 537c9f0a6Schristos * All rights reserved. 637c9f0a6Schristos * 737c9f0a6Schristos * This code is derived from software contributed to The NetBSD Foundation 837c9f0a6Schristos * by Hiroshi Horimoto <horimoto@cs-aoi.cs.sist.ac.jp> and 937c9f0a6Schristos * by J.T. Conklin <jtc@NetBSD.org>. 1037c9f0a6Schristos * 1137c9f0a6Schristos * Redistribution and use in source and binary forms, with or without 1237c9f0a6Schristos * modification, are permitted provided that the following conditions 1337c9f0a6Schristos * are met: 1437c9f0a6Schristos * 1. Redistributions of source code must retain the above copyright 1537c9f0a6Schristos * notice, this list of conditions and the following disclaimer. 1637c9f0a6Schristos * 2. Redistributions in binary form must reproduce the above copyright 1737c9f0a6Schristos * notice, this list of conditions and the following disclaimer in the 1837c9f0a6Schristos * documentation and/or other materials provided with the distribution. 1937c9f0a6Schristos * 2037c9f0a6Schristos * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 2137c9f0a6Schristos * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 2237c9f0a6Schristos * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2337c9f0a6Schristos * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 2437c9f0a6Schristos * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 2537c9f0a6Schristos * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 2637c9f0a6Schristos * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 2737c9f0a6Schristos * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 2837c9f0a6Schristos * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 2937c9f0a6Schristos * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 3037c9f0a6Schristos * POSSIBILITY OF SUCH DAMAGE. 3137c9f0a6Schristos */ 3237c9f0a6Schristos 3337c9f0a6Schristos#include <machine/asm.h> 3437c9f0a6Schristos 3537c9f0a6Schristos#if defined(LIBC_SCCS) && !defined(lint) 36*18ec38eaSchs RCSID("$NetBSD: strcmp.S,v 1.7 2013/09/07 19:06:29 chs Exp $") 3737c9f0a6Schristos#endif /* LIBC_SCCS and not lint */ 3837c9f0a6Schristos 391d398a17Smatt#ifdef __mcoldfire__ 401d398a17Smatt#define GETC(a,b) mvsb a,b 411d398a17Smatt#define SUBC(a,b) mvsb a,%d0; subl %d0,b 421d398a17Smatt#else 431d398a17Smatt#define GETC(a,b) movb a,b 441d398a17Smatt#define SUBC(a,b) subb a,b 451d398a17Smatt#endif 461d398a17Smatt 4737c9f0a6SchristosENTRY(strcmp) 4807a0a325Smatt movl 4(%sp),%a0 4907a0a325Smatt movl 8(%sp),%a1 50*18ec38eaSchs.L1: /* unrolled by 4 for 680[23]0's */ 511d398a17Smatt GETC((%a0)+,%d1) 52*18ec38eaSchs jeq .L2 531d398a17Smatt SUBC((%a1)+,%d1) 54*18ec38eaSchs jne .L3 5537c9f0a6Schristos 561d398a17Smatt GETC((%a0)+,%d1) 57*18ec38eaSchs jeq .L2 581d398a17Smatt SUBC((%a1)+,%d1) 59*18ec38eaSchs jne .L3 6037c9f0a6Schristos 611d398a17Smatt GETC((%a0)+,%d1) 62*18ec38eaSchs jeq .L2 631d398a17Smatt SUBC((%a1)+,%d1) 64*18ec38eaSchs jne .L3 6537c9f0a6Schristos 661d398a17Smatt GETC((%a0)+,%d1) 67*18ec38eaSchs jeq .L2 681d398a17Smatt SUBC((%a1)+,%d1) 69*18ec38eaSchs jeq .L1 7037c9f0a6Schristos 71*18ec38eaSchs.L3: 72cb2ad9b1Smatt#ifdef __mcoldfire__ 731d398a17Smatt movl %d1,%d0 74cb2ad9b1Smatt#else 75cb2ad9b1Smatt scs %d0 76cb2ad9b1Smatt EXTBL(%d0) 77cb2ad9b1Smatt movb %d1,%d0 78cb2ad9b1Smatt#endif 7937c9f0a6Schristos rts 8037c9f0a6Schristos 81*18ec38eaSchs.L2: movq #0,%d0 8207a0a325Smatt movb (%a1),%d0 8337c9f0a6Schristos negl %d0 8437c9f0a6Schristos rts 8565726debSmattEND(strcmp) 86