diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128/math_ldbl.h')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/math_ldbl.h | 52 |
1 files changed, 41 insertions, 11 deletions
diff --git a/sysdeps/ieee754/ldbl-128/math_ldbl.h b/sysdeps/ieee754/ldbl-128/math_ldbl.h index b3faa04846..db2bc5e0c3 100644 --- a/sysdeps/ieee754/ldbl-128/math_ldbl.h +++ b/sysdeps/ieee754/ldbl-128/math_ldbl.h @@ -1,41 +1,61 @@ -#ifndef _MATH_PRIVATE_H_ -#error "Never use <math_ldbl.h> directly; include <math_private.h> instead." -#endif +/* Manipulation of the bit representation of 'long double' quantities. + Copyright (C) 1999-2018 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/>. */ + +#ifndef _MATH_LDBL_H_ +#define _MATH_LDBL_H_ 1 + +#include <stdint.h> +#include <endian.h> /* A union which permits us to convert between a long double and four 32 bit ints or two 64 bit ints. */ -#if __FLOAT_WORD_ORDER == BIG_ENDIAN +#if __FLOAT_WORD_ORDER == __BIG_ENDIAN typedef union { long double value; struct { - u_int64_t msw; - u_int64_t lsw; + uint64_t msw; + uint64_t lsw; } parts64; struct { - u_int32_t w0, w1, w2, w3; + uint32_t w0, w1, w2, w3; } parts32; } ieee854_long_double_shape_type; #endif -#if __FLOAT_WORD_ORDER == LITTLE_ENDIAN +#if __FLOAT_WORD_ORDER == __LITTLE_ENDIAN typedef union { long double value; struct { - u_int64_t lsw; - u_int64_t msw; + uint64_t lsw; + uint64_t msw; } parts64; struct { - u_int32_t w3, w2, w1, w0; + uint32_t w3, w2, w1, w0; } parts32; } ieee854_long_double_shape_type; @@ -88,3 +108,13 @@ do { \ sh_u.value = (d); \ (v) = sh_u.parts64.lsw; \ } while (0) + +/* + On a platform already supporting a binary128 long double, + _Float128 will alias to long double. This transformation + makes aliasing *l functions to *f128 trivial. +*/ +#define _Float128 long double +#define L(x) x##L + +#endif /* math_ldbl.h */ |