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65 lines
2.4 KiB
C
65 lines
2.4 KiB
C
/*
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* Copyright (C) 2022 Ulrich Müller <ulm@gentoo.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see: <http://www.gnu.org/licenses/>.
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*
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*
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* Alternatively, at your option, you can distribute this file under
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* the terms of the 2-clause BSD license.
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*/
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#include "config.h"
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#include <assert.h>
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#include <math.h>
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#include <stdlib.h>
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#include "ieee80.h"
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int
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main(int argc, char **argv)
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{
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(void)argc; (void)argv; /* unused */
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/* Define only constants that can be exactly represented both in
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decimal and in binary, in order to avoid rounding errors */
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unsigned char in[][10] = {
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{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, /* 0 */
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{ 0x3f,0xff,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, /* 1 */
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{ 0xbf,0xff,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, /* -1 */
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{ 0x40,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, /* 2 */
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{ 0x3f,0xfe,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, /* 0.5 */
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{ 0x3f,0xf7,0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, /* 0.005859375 */
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{ 0x40,0x22,0x98,0x76,0x54,0x32,0x10,0x00,0x00,0x00 }, /* 40926266145 */
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{ 0x7f,0xff,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, /* inf */
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{ 0xff,0xff,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, /* -inf */
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{ 0x7f,0xff,0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x00 } /* nan */
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};
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assert(ieee_extended_to_double(in[0]) == 0.);
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assert(ieee_extended_to_double(in[1]) == 1.);
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assert(ieee_extended_to_double(in[2]) == -1.);
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assert(ieee_extended_to_double(in[3]) == 2.);
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assert(ieee_extended_to_double(in[4]) == 0.5);
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assert(ieee_extended_to_double(in[5]) == 0.005859375);
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assert(ieee_extended_to_double(in[6]) == 40926266145.);
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#ifdef INFINITY
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assert(ieee_extended_to_double(in[7]) == INFINITY);
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assert(ieee_extended_to_double(in[8]) == -INFINITY);
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#endif
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#ifdef NAN
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assert(isnan(ieee_extended_to_double(in[9])));
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#endif
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return EXIT_SUCCESS;
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}
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