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walnux/include/nuttx/lib/float.h
Alin Jerpelea a8a1308240 include: nuttx: update licenses to Apache 2.0 
The SGA from Gregory Nutt had been submitted and we can replace
the licenses to Apache 2.0

Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
2021-02-01 11:21:57 -03:00

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/****************************************************************************
* include/nuttx/lib/float.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __INCLUDE_NUTTX_LIB_FLOAT_H
#define __INCLUDE_NUTTX_LIB_FLOAT_H
/* TODO: These values could vary with architectures toolchains. This
* logic should be move at least to the include/arch directory.
*/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Radix of exponent representation, b. */
#define FLT_RADIX 2
/* Number of base-FLT_RADIX digits in the floating-point significand, p. */
#ifndef FLT_MANT_DIG /* May be defined in a toolchain header */
# define FLT_MANT_DIG 24
#endif
#ifndef DBL_MANT_DIG /* May be defined in a toolchain header */
# ifdef CONFIG_HAVE_DOUBLE
# define DBL_MANT_DIG 53
# else
# define DBL_MANT_DIG FLT_MANT_DIG
# endif
#endif
#ifndef LDBL_MANT_DIG /* May be defined in a toolchain header */
# ifdef CONFIG_HAVE_LONG_DOUBLE
# define LDBL_MANT_DIG DBL_MANT_DIG /* FIX ME */
# else
# define LDBL_MANT_DIG DBL_MANT_DIG
# endif
#endif
/* Number of decimal digits, n, such that any floating-point number in the
* widest supported floating type with pmax radix b digits can be rounded
* to a floating-point number with n decimal digits and back again without
* change to the value.
*/
#define DECIMAL_DIG 10
/* Number of decimal digits, q, such that any floating-point number with q
* decimal digits can be rounded into a floating-point number with p radix
* b digits and back again without change to the q decimal digits.
*/
#ifndef FLT_DIG /* May be defined in a toolchain header */
# define FLT_DIG 6
#endif
#ifndef DBL_DIG /* May be defined in a toolchain header */
# ifdef CONFIG_HAVE_DOUBLE
# define DBL_DIG 15 /* 10 */
# else
# define DBL_DIG FLT_DIG
# endif
#endif
#ifndef LDBL_DIG /* May be defined in a toolchain header */
# ifdef CONFIG_HAVE_LONG_DOUBLE
# define LDBL_DIG DBL_DIG /* FIX ME */
# else
# define LDBL_DIG DBL_DIG
# endif
#endif
/* Minimum negative integer such that FLT_RADIX raised to that power minus
* 1 is a normalized floating-point number, emin.
*/
#ifndef FLT_MIN_EXP /* May be defined in a toolchain header */
# define FLT_MIN_EXP (-125)
#endif
#ifndef DBL_MIN_EXP /* May be defined in a toolchain header */
# ifdef CONFIG_HAVE_DOUBLE
# define DBL_MIN_EXP (-1021)
# else
# define DBL_MIN_EXP FLT_MIN_EXP
# endif
#endif
#ifndef LDBL_MIN_EXP /* May be defined in a toolchain header */
# ifdef CONFIG_HAVE_LONG_DOUBLE
# define LDBL_MIN_EXP DBL_MIN_EXP /* FIX ME */
# else
# define LDBL_MIN_EXP DBL_MIN_EXP
# endif
#endif
/* Minimum negative integer such that 10 raised to that power is in the range
* of normalized floating-point numbers.
*/
#ifndef FLT_MIN_10_EXP /* May be defined in a toolchain header */
# define FLT_MIN_10_EXP (-37)
#endif
#ifndef DBL_MIN_10_EXP /* May be defined in a toolchain header */
# ifdef CONFIG_HAVE_DOUBLE
# define DBL_MIN_10_EXP (-307) /* -37 */
# else
# define DBL_MIN_10_EXP FLT_MIN_10_EXP
# endif
#endif
#ifndef LDBL_MIN_10_EXP /* May be defined in a toolchain header */
# ifdef CONFIG_HAVE_LONG_DOUBLE
# define LDBL_MIN_10_EXP DBL_MIN_10_EXP /* FIX ME */
# else
# define LDBL_MIN_10_EXP DBL_MIN_10_EXP
# endif
#endif
/* Maximum integer such that FLT_RADIX raised to that power minus 1 is a
* representable finite floating-point number, emax.
*/
#ifndef FLT_MAX_EXP /* May be defined in a toolchain header */
# define FLT_MAX_EXP 128
#endif
#ifndef DBL_MAX_EXP /* May be defined in a toolchain header */
# ifdef CONFIG_HAVE_DOUBLE
# define DBL_MAX_EXP 1024
# else
# define DBL_MAX_EXP FLT_MAX_EXP
# endif
#endif
#ifndef LDBL_MAX_EXP /* May be defined in a toolchain header */
# ifdef CONFIG_HAVE_LONG_DOUBLE
# define LDBL_MAX_EXP DBL_MAX_EXP /* FIX ME */
# else
# define LDBL_MAX_EXP DBL_MAX_EXP
# endif
#endif
/* Maximum integer such that 10 raised to that power is in the range of
* representable finite floating-point numbers.
*/
#ifndef FLT_MAX_10_EXP /* May be defined in toolchain header */
# define FLT_MAX_10_EXP 38 /* 37 */
#endif
#ifndef DBL_MAX_10_EXP /* May be defined in toolchain header */
# ifdef CONFIG_HAVE_DOUBLE
# define DBL_MAX_10_EXP 308 /* 37 */
# else
# define DBL_MAX_10_EXP FLT_MAX_10_EXP
# endif
#endif
#ifndef LDBL_MAX_10_EXP /* May be defined in toolchain header */
# ifdef CONFIG_HAVE_LONG_DOUBLE
# define LDBL_MAX_10_EXP DBL_MAX_10_EXP /* FIX ME */
# else
# define LDBL_MAX_10_EXP DBL_MAX_10_EXP
# endif
#endif
/* Maximum representable finite floating-point number. */
#ifndef FLT_MAX /* May be defined in toolchain header */
# define FLT_MAX 3.40282347e+38F /* 1E+37 */
#endif
#ifndef DBL_MAX /* May be defined in toolchain header */
# ifdef CONFIG_HAVE_DOUBLE
# define DBL_MAX 1.7976931348623157e+308 /* 1E+37 */
# else
# define DBL_MAX FLT_MAX
# endif
#endif
#ifndef LDBL_MAX /* May be defined in toolchain header */
# ifdef CONFIG_HAVE_LONG_DOUBLE
# define LDBL_MAX DBL_MAX /* FIX ME */
# else
# define LDBL_MAX DBL_MAX
# endif
#endif
/* The difference between 1 and the least value greater than 1 that is
* representable in the given floating-point type, b1-p.
*/
#ifndef FLT_EPSILON /* May be defined in toolchain header */
# define FLT_EPSILON 1.1920929e-07F /* 1E-5 */
#endif
#ifndef DBL_EPSILON /* May be defined in toolchain header */
# ifdef CONFIG_HAVE_DOUBLE
# define DBL_EPSILON 2.2204460492503131e-16 /* 1E-9 */
# else
# define DBL_EPSILON FLT_EPSILON
# endif
#endif
#ifndef LDBL_EPSILON /* May be defined in toolchain header */
# ifdef CONFIG_HAVE_LONG_DOUBLE
# define LDBL_EPSILON DBL_EPSILON /* FIX ME */
# else
# define LDBL_EPSILON DBL_EPSILON
# endif
#endif
/* Minimum normalized positive floating-point number, bemin -1. */
#ifndef FLT_MIN /* May be defined in toolchain header */
# define FLT_MIN 1.17549435e-38F /* 1E-37 */
#endif
#ifndef DBL_MIN /* May be defined in toolchain header */
# ifdef CONFIG_HAVE_DOUBLE
# define DBL_MIN 2.2250738585072014e-308 /* 1E-37 */
# else
# define DBL_MIN FLT_MIN
# endif
#endif
#ifndef LDBL_MIN /* May be defined in toolchain header */
# ifdef CONFIG_HAVE_LONG_DOUBLE
# define LDBL_MIN DBL_MIN /* FIX ME */
# else
# define LDBL_MIN DBL_MIN
# endif
#endif
#endif /* __INCLUDE_NUTTX_LIB_FLOAT_H */
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