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/* Generate table of tests in tst-strtod-round.c from
tst-strtod-round-data.
Copyright (C) 2012-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#define _GNU_SOURCE
#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <mpfr.h>
/* Work around incorrect ternary value from mpfr_strtofr
<https://sympa.inria.fr/sympa/arc/mpfr/2012-08/msg00005.html>. */
#define WORKAROUND
static int
string_to_fp (mpfr_t f, const char *s, mpfr_rnd_t rnd)
{
#ifdef WORKAROUND
mpfr_t f2;
mpfr_init2 (f2, 100000);
int r0 = mpfr_strtofr (f2, s, NULL, 0, rnd);
int r = mpfr_set (f, f2, rnd);
mpfr_subnormalize (f, r, rnd);
mpfr_clear (f2);
return r0 | r;
#else
int r = mpfr_strtofr (f, s, NULL, 0, rnd);
mpfr_subnormalize (f, r, rnd);
return r;
#endif
}
static void
print_fp (mpfr_t f, const char *suffix, const char *suffix2)
{
if (mpfr_inf_p (f))
mpfr_printf ("\t%sINFINITY%s", mpfr_signbit (f) ? "-" : "", suffix2);
else
mpfr_printf ("\t%Ra%s%s", f, suffix, suffix2);
}
static void
round_str (const char *s, const char *suffix,
int prec, int emin, int emax, bool need_exact)
{
mpfr_t f;
mpfr_set_default_prec (prec);
mpfr_set_emin (emin);
mpfr_set_emax (emax);
mpfr_init (f);
int r = string_to_fp (f, s, MPFR_RNDD);
if (need_exact)
{
assert (prec == 106 && emin == -1073 && emax == 1024);
/* The maximum value in IBM long double has discontiguous
mantissa bits. */
mpfr_t max_value;
mpfr_init2 (max_value, 107);
mpfr_set_str (max_value, "0x1.fffffffffffff7ffffffffffffcp+1023", 0,
MPFR_RNDN);
if (mpfr_cmpabs (f, max_value) > 0)
r = 1;
mpfr_printf ("\t%s,\n", r ? "false" : "true");
mpfr_clear (max_value);
}
print_fp (f, suffix, ",\n");
string_to_fp (f, s, MPFR_RNDN);
print_fp (f, suffix, ",\n");
string_to_fp (f, s, MPFR_RNDZ);
print_fp (f, suffix, ",\n");
string_to_fp (f, s, MPFR_RNDU);
print_fp (f, suffix, "");
mpfr_clear (f);
}
static void
round_for_all (const char *s)
{
static const struct fmt {
const char *suffix;
int prec;
int emin;
int emax;
bool need_exact;
} formats[7] = {
{ "f", 24, -148, 128, false },
{ "", 53, -1073, 1024, false },
{ "L", 53, -1073, 1024, false },
/* This is the Intel extended float format. */
{ "L", 64, -16444, 16384, false },
/* This is the Motorola extended float format. */
{ "L", 64, -16445, 16384, false },
{ "L", 106, -1073, 1024, true },
{ "L", 113, -16493, 16384, false },
};
mpfr_printf (" TEST (\"");
const char *p;
for (p = s; *p; p++)
{
putchar (*p);
if ((p - s) % 60 == 59 && p[1])
mpfr_printf ("\"\n\t\"");
}
mpfr_printf ("\",\n");
int i;
for (i = 0; i < 7; i++)
{
round_str (s, formats[i].suffix, formats[i].prec,
formats[i].emin, formats[i].emax, formats[i].need_exact);
if (i < 6)
mpfr_printf (",\n");
}
mpfr_printf ("),\n");
}
int
main (void)
{
char *p = NULL;
size_t len;
ssize_t nbytes;
while ((nbytes = getline (&p, &len, stdin)) != -1)
{
if (p[nbytes - 1] == '\n')
p[nbytes - 1] = 0;
round_for_all (p);
free (p);
p = NULL;
}
return 0;
}
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