diff options
Diffstat (limited to 'bits')
| -rw-r--r-- | bits/flt-eval-method.h | 42 | ||||
| -rw-r--r-- | bits/mathdef.h | 7 |
2 files changed, 42 insertions, 7 deletions
diff --git a/bits/flt-eval-method.h b/bits/flt-eval-method.h new file mode 100644 index 0000000000..8ecd6a6664 --- /dev/null +++ b/bits/flt-eval-method.h @@ -0,0 +1,42 @@ +/* Define __GLIBC_FLT_EVAL_METHOD. + Copyright (C) 2016 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_H +# error "Never use <bits/flt-eval-method.h> directly; include <math.h> instead." +#endif + +/* __GLIBC_FLT_EVAL_METHOD is the value of FLT_EVAL_METHOD used to + determine the evaluation method typedefs such as float_t and + double_t. It must be a value from C11 or TS 18661-3:2015, and not + -1. */ + +/* In the default version of this header, follow __FLT_EVAL_METHOD__. + -1 is mapped to 2 (considering evaluation as long double to be a + conservatively safe assumption), and if __FLT_EVAL_METHOD__ is not + defined then assume there is no excess precision and use the value + 0. */ + +#ifdef __FLT_EVAL_METHOD__ +# if __FLT_EVAL_METHOD__ == -1 +# define __GLIBC_FLT_EVAL_METHOD 2 +# else +# define __GLIBC_FLT_EVAL_METHOD __FLT_EVAL_METHOD__ +# endif +#else +# define __GLIBC_FLT_EVAL_METHOD 0 +#endif diff --git a/bits/mathdef.h b/bits/mathdef.h index d557d08582..6dedc51c83 100644 --- a/bits/mathdef.h +++ b/bits/mathdef.h @@ -22,13 +22,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -/* Expressions are evaluated with the range and precision of their - type. */ -typedef float float_t; /* `float' expressions are evaluated as - `float'. */ -typedef double double_t; /* `double' expressions are evaluated as - `double'. */ - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-2147483647) # define FP_ILOGBNAN 2147483647 |