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- /*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * 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. 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.
- *
- * @(#)quad.h 8.1 (Berkeley) 6/4/93
- * $FreeBSD$
- */
- /*
- * Quad arithmetic.
- *
- * This library makes the following assumptions:
- *
- * - The type long long (aka quad_t) exists.
- *
- * - A quad variable is exactly twice as long as `long'.
- *
- * - The machine's arithmetic is two's complement.
- *
- * This library can provide 128-bit arithmetic on a machine with 128-bit
- * quads and 64-bit longs, for instance, or 96-bit arithmetic on machines
- * with 48-bit longs.
- */
- #include <sys/types.h>
- #include <limits.h>
- /*
- * Depending on the desired operation, we view a `long long' (aka quad_t) in
- * one or more of the following formats.
- */
- union uu {
- quad_t q; /* as a (signed) quad */
- quad_t uq; /* as an unsigned quad */
- long sl[2]; /* as two signed longs */
- u_long ul[2]; /* as two unsigned longs */
- };
- /*
- * Define high and low longwords.
- */
- #define H _QUAD_HIGHWORD
- #define L _QUAD_LOWWORD
- /*
- * Total number of bits in a quad_t and in the pieces that make it up.
- * These are used for shifting, and also below for halfword extraction
- * and assembly.
- */
- #define QUAD_BITS (sizeof(quad_t) * CHAR_BIT)
- #define LONG_BITS (sizeof(long) * CHAR_BIT)
- #define HALF_BITS (sizeof(long) * CHAR_BIT / 2)
- /*
- * Extract high and low shortwords from longword, and move low shortword of
- * longword to upper half of long, i.e., produce the upper longword of
- * ((quad_t)(x) << (number_of_bits_in_long/2)). (`x' must actually be u_long.)
- *
- * These are used in the multiply code, to split a longword into upper
- * and lower halves, and to reassemble a product as a quad_t, shifted left
- * (sizeof(long)*CHAR_BIT/2).
- */
- #define HHALF(x) ((x) >> HALF_BITS)
- #define LHALF(x) ((x) & ((1L << HALF_BITS) - 1))
- #define LHUP(x) ((x) << HALF_BITS)
- int __cmpdi2(quad_t a, quad_t b);
- quad_t __divdi3(quad_t a, quad_t b);
- quad_t __moddi3(quad_t a, quad_t b);
- u_quad_t __qdivrem(u_quad_t u, u_quad_t v, u_quad_t *rem);
- int __ucmpdi2(u_quad_t a, u_quad_t b);
- u_quad_t __udivdi3(u_quad_t a, u_quad_t b);
- u_quad_t __umoddi3(u_quad_t a, u_quad_t b);
- typedef unsigned int qshift_t;
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