1/* $NetBSD: modsi3.S,v 1.7 2014/03/04 04:03:49 matt 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 * the Systems Programming Group of the University of Utah Computer 9 * Science Department. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#include <machine/asm.h> 37 38#if defined(LIBC_SCCS) && !defined(lint) 39#if 0 40 RCSID("from: @(#)modsi3.s 5.1 (Berkeley) 6/7/90") 41#else 42 RCSID("$NetBSD: modsi3.S,v 1.7 2014/03/04 04:03:49 matt Exp $") 43#endif 44#endif /* LIBC_SCCS and not lint */ 45 46/* int % int */ 47#ifndef __mc68010__ 48ENTRY(__modsi3) 49 movel 4(%sp),%d1 50#ifdef __mcoldfire__ 51 remsl 8(%sp),%d0:%d1 52 divsl 8(%sp),%d1 53#else 54 divsll 8(%sp),%d0:%d1 55#endif 56 rts 57END(__modsi3) 58#else 59ENTRY(__modsi3) 60| NB: this requires that __udivsi3 preserve %a0 and return 61| the modulus in %d1: 62 movel (%sp)+, %a0 | pop return address 63 movel 4(%sp), %d1 | load the divisor 64 bpl 1f 65 negl 4(%sp) | store abs(divisor) 661: movel (%sp), %d0 | load the dividend 67 pea (.Lret,%pc) | push our return address 68 bpl 2f 69 negl 4(%sp) | store abs(dividend) 70 subql #2, (%sp) | adjust return address 712: jmp _C_LABEL(__udivsi3) 72 negl %d1 | negate modulus 73.Lret: movl %d1, %d0 | move modulus into %d0 74 jmp (%a0) 75END(__modsi3) 76#endif /* __mc68010__ */ 77