1/* $NetBSD: udivsi3.S,v 1.2 1999/12/21 21:48:19 msaitoh Exp $ */ 2 3/*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * from: @(#)udivsi3.s 5.1 (Berkeley) 5/15/90 39 */ 40 41#include <machine/asm.h> 42#if defined(LIBC_SCCS) 43 RCSID("$NetBSD: udivsi3.S,v 1.2 1999/12/21 21:48:19 msaitoh Exp $") 44#endif 45 46/* r0 <= r4 / r5 */ 47ENTRY(__udivsi3) 48 tst r5, r5 49 bt div_by_zero 50 51 mov #0, r0 52 div0u 53#define DIVSTEP rotcl r4; div1 r5, r0 54 /* repeat 32 times */ 55 DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 56 DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 57 DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 58 DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 59#undef DIVSTEP 60 rotcl r4 61 62 rts 63 mov r4, r0 /* delay slot */ 64 65div_by_zero: 66#if defined(_KERNEL) || defined(_STANDALONE) 67 rts 68 mov #0, r0 /* delay slot */ 69#else 70 mov.l r14, @-r15 71 sts.l pr, @-r15 72 mov r15, r14 73 74 mov.l L_raise, r1 75 jsr @r1 76 mov #8, r4 /* delay slot */ 77 mov #0, r0 78 79 lds.l @r15+, pr 80 rts 81 mov.l @r15+, r14 /* delay slot */ 82 83 .align 2 84L_raise: 85 .long _raise 86#endif 87