| 1 | /*-␊ |
| 2 | * Copyright (c) 1992, 1993␊ |
| 3 | *␉The Regents of the University of California. All rights reserved.␊ |
| 4 | *␊ |
| 5 | * This software was developed by the Computer Systems Engineering group␊ |
| 6 | * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and␊ |
| 7 | * contributed to Berkeley.␊ |
| 8 | *␊ |
| 9 | * Redistribution and use in source and binary forms, with or without␊ |
| 10 | * modification, are permitted provided that the following conditions␊ |
| 11 | * are met:␊ |
| 12 | * 1. Redistributions of source code must retain the above copyright␊ |
| 13 | * notice, this list of conditions and the following disclaimer.␊ |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright␊ |
| 15 | * notice, this list of conditions and the following disclaimer in the␊ |
| 16 | * documentation and/or other materials provided with the distribution.␊ |
| 17 | * 3. All advertising materials mentioning features or use of this software␊ |
| 18 | * must display the following acknowledgement:␊ |
| 19 | *␉This product includes software developed by the University of␊ |
| 20 | *␉California, Berkeley and its contributors.␊ |
| 21 | * 4. Neither the name of the University nor the names of its contributors␊ |
| 22 | * may be used to endorse or promote products derived from this software␊ |
| 23 | * without specific prior written permission.␊ |
| 24 | *␊ |
| 25 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND␊ |
| 26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE␊ |
| 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE␊ |
| 28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE␊ |
| 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL␊ |
| 30 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS␊ |
| 31 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)␊ |
| 32 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT␊ |
| 33 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY␊ |
| 34 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF␊ |
| 35 | * SUCH DAMAGE.␊ |
| 36 | *␊ |
| 37 | * $FreeBSD: src/sys/libkern/divdi3.c,v 1.6 1999/08/28 00:46:31 peter Exp $␊ |
| 38 | */␊ |
| 39 | ␊ |
| 40 | #include "quad.h"␊ |
| 41 | ␊ |
| 42 | /*␊ |
| 43 | * Divide two signed quads.␊ |
| 44 | * ??? if -1/2 should produce -1 on this machine, this code is wrong␊ |
| 45 | */␊ |
| 46 | quad_t␊ |
| 47 | __divdi3(a, b)␊ |
| 48 | quad_t a, b;␊ |
| 49 | {␊ |
| 50 | ␉u_quad_t ua, ub, uq;␊ |
| 51 | ␉int neg;␊ |
| 52 | ␊ |
| 53 | ␉if (a < 0)␊ |
| 54 | ␉␉ua = -(u_quad_t)a, neg = 1;␊ |
| 55 | ␉else␊ |
| 56 | ␉␉ua = a, neg = 0;␊ |
| 57 | ␉if (b < 0)␊ |
| 58 | ␉␉ub = -(u_quad_t)b, neg ^= 1;␊ |
| 59 | ␉else␊ |
| 60 | ␉␉ub = b;␊ |
| 61 | ␉uq = __qdivrem(ua, ub, (u_quad_t *)0);␊ |
| 62 | ␉return (neg ? -uq : uq);␊ |
| 63 | }␊ |
| 64 | |
