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. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)quad.h 8.1 (Berkeley) 6/4/93 34 * $FreeBSD: src/lib/libstand/quad.h,v 1.2 1999/08/28 00:05:33 peter Exp $ 35 */ 36 37 #ifndef _STAND_QUAD_H_ 38 #define _STAND_QUAD_H_ 39 40 #include <sys/cdefs.h> 41 #include <sys/types.h> 42 #include <limits.h> 43 44 _Static_assert(sizeof(quad_t) == sizeof(int) * 2, 45 "Bitwise function in libstand are broken on this architecture"); 46 47 /* 48 * Depending on the desired operation, we view a `long long' (aka quad_t) in 49 * one or more of the following formats. 50 */ 51 union uu { 52 quad_t q; /* as a (signed) quad */ 53 quad_t uq; /* as an unsigned quad */ 54 int sl[2]; /* as two signed ints */ 55 u_int ul[2]; /* as two unsigned ints */ 56 }; 57 58 #define HALF_BITS (sizeof(int) * CHAR_BIT / 2) 59 60 #define HHALF(x) ((x) >> HALF_BITS) 61 #define LHALF(x) ((x) & ((1 << HALF_BITS) - 1)) 62 63 u_quad_t __udivmoddi4 (u_quad_t, u_quad_t, u_quad_t *); 64 u_quad_t __udivdi3 (u_quad_t, u_quad_t); 65 u_quad_t __umoddi3 (u_quad_t, u_quad_t); 66 67 #endif /* !_STAND_QUAD_H_ */ 68