1 /* $NetBSD: quad.h,v 1.7 2012/08/06 02:31:54 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 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 * @(#)quad.h 8.1 (Berkeley) 6/4/93 36 */ 37 38 /* 39 * Quad arithmetic. 40 * 41 * This library makes the following assumptions: 42 * 43 * - The type long long (aka quad_t) exists. 44 * 45 * - A quad variable is exactly twice as long as `int'. 46 * 47 * - The machine's arithmetic is two's complement. 48 * 49 * This library can provide 128-bit arithmetic on a machine with 128-bit 50 * quads and 64-bit ints, for instance, or 96-bit arithmetic on machines 51 * with 48-bit ints. 52 */ 53 54 #include <sys/types.h> 55 #if !defined(_KERNEL) && !defined(_STANDALONE) 56 #include <limits.h> 57 #else 58 #include <machine/limits.h> 59 #endif 60 61 #if defined(__ARM_EABI__) && !defined(lint) 62 #define ARM_EABI_ALIAS(alias,sym) __strong_alias(alias,sym); 63 #else 64 #define ARM_EABI_ALIAS(alias,sym) /* nothing */ 65 #endif 66 67 /* 68 * Depending on the desired operation, we view a `long long' (aka quad_t) in 69 * one or more of the following formats. 70 */ 71 union uu { 72 quad_t q; /* as a (signed) quad */ 73 u_quad_t uq; /* as an unsigned quad */ 74 int sl[2]; /* as two signed ints */ 75 u_int ul[2]; /* as two unsigned ints */ 76 }; 77 78 /* 79 * Define high and low parts of a quad_t. 80 */ 81 #define H _QUAD_HIGHWORD 82 #define L _QUAD_LOWWORD 83 84 /* 85 * Total number of bits in a quad_t and in the pieces that make it up. 86 * These are used for shifting, and also below for halfword extraction 87 * and assembly. 88 */ 89 #define QUAD_BITS (sizeof(quad_t) * CHAR_BIT) 90 #define INT_BITS (sizeof(int) * CHAR_BIT) 91 #define HALF_BITS (sizeof(int) * CHAR_BIT / 2) 92 93 /* 94 * Extract high and low shortwords from longword, and move low shortword of 95 * longword to upper half of long, i.e., produce the upper longword of 96 * ((quad_t)(x) << (number_of_bits_in_int/2)). (`x' must actually be u_int.) 97 * 98 * These are used in the multiply code, to split a longword into upper 99 * and lower halves, and to reassemble a product as a quad_t, shifted left 100 * (sizeof(int)*CHAR_BIT/2). 101 */ 102 #define HHALF(x) ((u_int)(x) >> HALF_BITS) 103 #define LHALF(x) ((u_int)(x) & (((int)1 << (u_int)HALF_BITS) - 1)) 104 #define LHUP(x) ((u_int)(x) << (u_int)HALF_BITS) 105 106 /* 107 * XXX 108 * Compensate for gcc 1 vs gcc 2. Gcc 1 defines ?sh?di3's second argument 109 * as u_quad_t, while gcc 2 correctly uses int. Unfortunately, we still use 110 * both compilers. 111 */ 112 #if __GNUC_PREREQ__(2, 0) || defined(lint) 113 typedef unsigned int qshift_t; 114 #else 115 typedef u_quad_t qshift_t; 116 #endif 117 118 __BEGIN_DECLS 119 quad_t __adddi3(quad_t, quad_t); 120 quad_t __anddi3(quad_t, quad_t); 121 quad_t __ashldi3(quad_t, qshift_t); 122 quad_t __ashrdi3(quad_t, qshift_t); 123 int __cmpdi2(quad_t, quad_t); 124 quad_t __divdi3(quad_t, quad_t); 125 quad_t __fixtfdi(long double); 126 quad_t __fixdfdi(double); 127 quad_t __fixsfdi(float); 128 u_quad_t __fixunstfdi(long double); 129 u_quad_t __fixunsdfdi(double); 130 u_quad_t __fixunssfdi(float); 131 long double __floatditf(quad_t); 132 double __floatdidf(quad_t); 133 float __floatdisf(quad_t); 134 long double __floatunditf(u_quad_t); 135 double __floatundidf(u_quad_t); 136 float __floatundisf(u_quad_t); 137 quad_t __iordi3(quad_t, quad_t); 138 quad_t __lshldi3(quad_t, qshift_t); 139 quad_t __lshrdi3(quad_t, qshift_t); 140 quad_t __moddi3(quad_t, quad_t); 141 quad_t __muldi3(quad_t, quad_t); 142 quad_t __negdi2(quad_t); 143 quad_t __one_cmpldi2(quad_t); 144 u_quad_t __qdivrem(u_quad_t, u_quad_t, u_quad_t *); 145 quad_t __subdi3(quad_t, quad_t); 146 int __ucmpdi2(u_quad_t, u_quad_t); 147 u_quad_t __udivdi3(u_quad_t, u_quad_t ); 148 u_quad_t __umoddi3(u_quad_t, u_quad_t ); 149 quad_t __xordi3(quad_t, quad_t); 150 __END_DECLS 151
Indexes created Sat Sep 20 22:09:52 GMT 2025