feb1d5507e
-Werror warnings from clang 10.0.0, such as:
lib/libc/quad/fixdfdi.c:57:12: error: implicit conversion from 'long long' to 'double' changes value from 9223372036854775807 to 9223372036854775808 [-Werror,-Wimplicit-int-float-conversion]
if (x >= QUAD_MAX)
~~ ^~~~~~~~
/usr/obj/usr/src/powerpc.powerpc/tmp/usr/include/sys/limits.h:89:19: note: expanded from macro 'QUAD_MAX'
#define QUAD_MAX (__QUAD_MAX) /* max value for a quad_t */
^~~~~~~~~~
/usr/obj/usr/src/powerpc.powerpc/tmp/usr/include/machine/_limits.h:91:20: note: expanded from macro '__QUAD_MAX'
#define __QUAD_MAX __LLONG_MAX /* max value for a quad_t */
^~~~~~~~~~~
/usr/obj/usr/src/powerpc.powerpc/tmp/usr/include/machine/_limits.h:75:21: note: expanded from macro '__LLONG_MAX'
#define __LLONG_MAX 0x7fffffffffffffffLL /* max value for a long long */
^~~~~~~~~~~~~~~~~~~~
and many instances of:
lib/libc/quad/fixunsdfdi.c:73:17: error: shift count >= width of type [-Werror,-Wshift-count-overflow]
toppart = (x - ONE_HALF) / ONE;
^~~~~~~~
lib/libc/quad/fixunsdfdi.c:45:19: note: expanded from macro 'ONE_HALF'
#define ONE_HALF (ONE_FOURTH * 2.0)
^~~~~~~~~~
lib/libc/quad/fixunsdfdi.c:44:23: note: expanded from macro 'ONE_FOURTH'
#define ONE_FOURTH (1 << (LONG_BITS - 2))
^ ~~~~~~~~~~~~~~~
lib/libc/quad/fixunsdfdi.c:73:29: error: shift count >= width of type [-Werror,-Wshift-count-overflow]
toppart = (x - ONE_HALF) / ONE;
^~~
lib/libc/quad/fixunsdfdi.c:46:15: note: expanded from macro 'ONE'
#define ONE (ONE_FOURTH * 4.0)
^~~~~~~~~~
lib/libc/quad/fixunsdfdi.c:44:23: note: expanded from macro 'ONE_FOURTH'
#define ONE_FOURTH (1 << (LONG_BITS - 2))
^ ~~~~~~~~~~~~~~~
106 lines
3.8 KiB
C
106 lines
3.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)quad.h 8.1 (Berkeley) 6/4/93
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* $FreeBSD$
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*/
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/*
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* Quad arithmetic.
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*
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* This library makes the following assumptions:
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*
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* - The type long long (aka quad_t) exists.
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*
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* - A quad variable is exactly twice as long as `long'.
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*
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* - The machine's arithmetic is two's complement.
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*
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* This library can provide 128-bit arithmetic on a machine with 128-bit
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* quads and 64-bit longs, for instance, or 96-bit arithmetic on machines
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* with 48-bit longs.
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*/
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#include <sys/types.h>
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#include <limits.h>
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/*
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* Depending on the desired operation, we view a `long long' (aka quad_t) in
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* one or more of the following formats.
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*/
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union uu {
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quad_t q; /* as a (signed) quad */
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quad_t uq; /* as an unsigned quad */
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long sl[2]; /* as two signed longs */
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u_long ul[2]; /* as two unsigned longs */
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};
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/*
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* Define high and low longwords.
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*/
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#define H _QUAD_HIGHWORD
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#define L _QUAD_LOWWORD
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/*
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* Total number of bits in a quad_t and in the pieces that make it up.
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* These are used for shifting, and also below for halfword extraction
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* and assembly.
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*/
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#define QUAD_BITS (sizeof(quad_t) * CHAR_BIT)
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#define LONG_BITS (sizeof(long) * CHAR_BIT)
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#define HALF_BITS (sizeof(long) * CHAR_BIT / 2)
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/*
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* Extract high and low shortwords from longword, and move low shortword of
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* longword to upper half of long, i.e., produce the upper longword of
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* ((quad_t)(x) << (number_of_bits_in_long/2)). (`x' must actually be u_long.)
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*
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* These are used in the multiply code, to split a longword into upper
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* and lower halves, and to reassemble a product as a quad_t, shifted left
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* (sizeof(long)*CHAR_BIT/2).
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*/
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#define HHALF(x) ((x) >> HALF_BITS)
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#define LHALF(x) ((x) & ((1L << HALF_BITS) - 1))
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#define LHUP(x) ((x) << HALF_BITS)
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int __cmpdi2(quad_t a, quad_t b);
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quad_t __divdi3(quad_t a, quad_t b);
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quad_t __moddi3(quad_t a, quad_t b);
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u_quad_t __qdivrem(u_quad_t u, u_quad_t v, u_quad_t *rem);
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int __ucmpdi2(u_quad_t a, u_quad_t b);
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u_quad_t __udivdi3(u_quad_t a, u_quad_t b);
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u_quad_t __umoddi3(u_quad_t a, u_quad_t b);
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typedef unsigned int qshift_t;
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