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/* Multiply a 'float' by a power of 2.
Copyright 2002-2003, 2007-2025 Free Software Foundation, Inc.
This file 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.
This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Paolo Bonzini and Bruno Haible. */
#include <config.h>
/* Specification. */
#include <math.h>
/* Avoid some warnings from "gcc -Wshadow".
This file doesn't use the exp() function. */
#undef exp
#define exp exponent
#if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
long double
ldexpl (long double x, int exp)
{
return ldexp (x, exp);
}
#else
# define USE_LONG_DOUBLE
# include "ldexp.c"
#endif
#if 0
int
main (void)
{
long double x;
int y;
for (y = 0; y < 29; y++)
printf ("%5d %.16Lg %.16Lg\n", y, ldexpl (0.8L, y), ldexpl (0.8L, -y) * ldexpl (0.8L, y));
}
#endif
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