| /* Copyright (C) 1995-2014 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 "gmp.h" |
| #include "gmp-impl.h" |
| #include <ieee754.h> |
| #include <float.h> |
| |
| /* Convert a multi-precision integer of the needed number of bits (24 for |
| float) and an integral power of two to a `float' in IEEE754 single- |
| precision format. */ |
| |
| float |
| __mpn_construct_float (mp_srcptr frac_ptr, int expt, int sign) |
| { |
| union ieee754_float u; |
| |
| u.ieee.negative = sign; |
| u.ieee.exponent = expt + IEEE754_FLOAT_BIAS; |
| #if BITS_PER_MP_LIMB > FLT_MANT_DIG |
| u.ieee.mantissa = frac_ptr[0] & (((mp_limb_t) 1 << FLT_MANT_DIG) - 1); |
| #else |
| #error "mp_limb size " BITS_PER_MP_LIMB "not accounted for" |
| #endif |
| |
| return u.f; |
| } |