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Diffstat (limited to 'sys/lib/libkern/moddi3.c')
| -rw-r--r-- | sys/lib/libkern/moddi3.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/sys/lib/libkern/moddi3.c b/sys/lib/libkern/moddi3.c new file mode 100644 index 00000000000..1d16c88d943 --- /dev/null +++ b/sys/lib/libkern/moddi3.c @@ -0,0 +1,73 @@ +/* $NetBSD: moddi3.c,v 1.5 1995/10/07 09:26:31 mycroft Exp $ */ + +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * This software was developed by the Computer Systems Engineering group + * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and + * contributed to Berkeley. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +#if 0 +static char sccsid[] = "@(#)moddi3.c 8.1 (Berkeley) 6/4/93"; +#else +static char rcsid[] = "$NetBSD: moddi3.c,v 1.5 1995/10/07 09:26:31 mycroft Exp $"; +#endif +#endif /* LIBC_SCCS and not lint */ + +#include "quad.h" + +/* + * Return remainder after dividing two signed quads. + * + * XXX + * If -1/2 should produce -1 on this machine, this code is wrong. + */ +quad_t +__moddi3(a, b) + quad_t a, b; +{ + u_quad_t ua, ub, ur; + int neg; + + if (a < 0) + ua = -(u_quad_t)a, neg = 1; + else + ua = a, neg = 0; + if (b < 0) + ub = -(u_quad_t)b, neg ^= 1; + else + ub = b; + (void)__qdivrem(ua, ub, &ur); + return (neg ? -ur : ur); +} |