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/* Copyright (C) 2012-2019 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/>. */
#include <math.h>
#include <math_private.h>
#include <float.h>
static const _Float128 log10_high = L(0x2.4d763776aaa2bp0);
static const _Float128 log10_low = L(0x5.ba95b58ae0b4c28a38a3fb3e7698p-60);
_Float128
__ieee754_exp10l (_Float128 arg)
{
ieee854_long_double_shape_type u;
_Float128 arg_high, arg_low;
_Float128 exp_high, exp_low;
if (!isfinite (arg))
return __ieee754_expl (arg);
if (arg < LDBL_MIN_10_EXP - LDBL_DIG - 10)
return LDBL_MIN * LDBL_MIN;
else if (arg > LDBL_MAX_10_EXP + 1)
return LDBL_MAX * LDBL_MAX;
else if (fabsl (arg) < L(0x1p-116))
return 1;
u.value = arg;
u.parts64.lsw &= 0xfe00000000000000LL;
arg_high = u.value;
arg_low = arg - arg_high;
exp_high = arg_high * log10_high;
exp_low = arg_high * log10_low + arg_low * M_LN10l;
return __ieee754_expl (exp_high) * __ieee754_expl (exp_low);
}
strong_alias (__ieee754_exp10l, __exp10l_finite)
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