diff options
Diffstat (limited to 'REORG.TODO/sysdeps/ieee754/flt-32/mpn2flt.c')
-rw-r--r-- | REORG.TODO/sysdeps/ieee754/flt-32/mpn2flt.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/ieee754/flt-32/mpn2flt.c b/REORG.TODO/sysdeps/ieee754/flt-32/mpn2flt.c new file mode 100644 index 0000000000..abf6510f4e --- /dev/null +++ b/REORG.TODO/sysdeps/ieee754/flt-32/mpn2flt.c @@ -0,0 +1,41 @@ +/* Copyright (C) 1995-2017 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; +} |