| /* Copyright (C) 2002, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3, or (at your option) |
| any later version. |
| |
| GCC 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 General Public License for more details. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* |
| * ISO C Standard: 5.2.4.2.2 Characteristics of floating types <float.h> |
| */ |
| |
| #ifndef _FLOAT_H___ |
| #define _FLOAT_H___ |
| |
| /* Radix of exponent representation, b. */ |
| #undef FLT_RADIX |
| #define FLT_RADIX __FLT_RADIX__ |
| |
| /* Number of base-FLT_RADIX digits in the significand, p. */ |
| #undef FLT_MANT_DIG |
| #undef DBL_MANT_DIG |
| #undef LDBL_MANT_DIG |
| #define FLT_MANT_DIG __FLT_MANT_DIG__ |
| #define DBL_MANT_DIG __DBL_MANT_DIG__ |
| #define LDBL_MANT_DIG __LDBL_MANT_DIG__ |
| |
| /* 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, |
| |
| p * log10(b) if b is a power of 10 |
| floor((p - 1) * log10(b)) otherwise |
| */ |
| #undef FLT_DIG |
| #undef DBL_DIG |
| #undef LDBL_DIG |
| #define FLT_DIG __FLT_DIG__ |
| #define DBL_DIG __DBL_DIG__ |
| #define LDBL_DIG __LDBL_DIG__ |
| |
| /* Minimum int x such that FLT_RADIX**(x-1) is a normalized float, emin */ |
| #undef FLT_MIN_EXP |
| #undef DBL_MIN_EXP |
| #undef LDBL_MIN_EXP |
| #define FLT_MIN_EXP __FLT_MIN_EXP__ |
| #define DBL_MIN_EXP __DBL_MIN_EXP__ |
| #define LDBL_MIN_EXP __LDBL_MIN_EXP__ |
| |
| /* Minimum negative integer such that 10 raised to that power is in the |
| range of normalized floating-point numbers, |
| |
| ceil(log10(b) * (emin - 1)) |
| */ |
| #undef FLT_MIN_10_EXP |
| #undef DBL_MIN_10_EXP |
| #undef LDBL_MIN_10_EXP |
| #define FLT_MIN_10_EXP __FLT_MIN_10_EXP__ |
| #define DBL_MIN_10_EXP __DBL_MIN_10_EXP__ |
| #define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__ |
| |
| /* Maximum int x such that FLT_RADIX**(x-1) is a representable float, emax. */ |
| #undef FLT_MAX_EXP |
| #undef DBL_MAX_EXP |
| #undef LDBL_MAX_EXP |
| #define FLT_MAX_EXP __FLT_MAX_EXP__ |
| #define DBL_MAX_EXP __DBL_MAX_EXP__ |
| #define LDBL_MAX_EXP __LDBL_MAX_EXP__ |
| |
| /* Maximum integer such that 10 raised to that power is in the range of |
| representable finite floating-point numbers, |
| |
| floor(log10((1 - b**-p) * b**emax)) |
| */ |
| #undef FLT_MAX_10_EXP |
| #undef DBL_MAX_10_EXP |
| #undef LDBL_MAX_10_EXP |
| #define FLT_MAX_10_EXP __FLT_MAX_10_EXP__ |
| #define DBL_MAX_10_EXP __DBL_MAX_10_EXP__ |
| #define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__ |
| |
| /* Maximum representable finite floating-point number, |
| |
| (1 - b**-p) * b**emax |
| */ |
| #undef FLT_MAX |
| #undef DBL_MAX |
| #undef LDBL_MAX |
| #define FLT_MAX __FLT_MAX__ |
| #define DBL_MAX __DBL_MAX__ |
| #define LDBL_MAX __LDBL_MAX__ |
| |
| /* The difference between 1 and the least value greater than 1 that is |
| representable in the given floating point type, b**1-p. */ |
| #undef FLT_EPSILON |
| #undef DBL_EPSILON |
| #undef LDBL_EPSILON |
| #define FLT_EPSILON __FLT_EPSILON__ |
| #define DBL_EPSILON __DBL_EPSILON__ |
| #define LDBL_EPSILON __LDBL_EPSILON__ |
| |
| /* Minimum normalized positive floating-point number, b**(emin - 1). */ |
| #undef FLT_MIN |
| #undef DBL_MIN |
| #undef LDBL_MIN |
| #define FLT_MIN __FLT_MIN__ |
| #define DBL_MIN __DBL_MIN__ |
| #define LDBL_MIN __LDBL_MIN__ |
| |
| /* Addition rounds to 0: zero, 1: nearest, 2: +inf, 3: -inf, -1: unknown. */ |
| /* ??? This is supposed to change with calls to fesetround in <fenv.h>. */ |
| #undef FLT_ROUNDS |
| #define FLT_ROUNDS 1 |
| |
| #if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L |
| /* The floating-point expression evaluation method. |
| -1 indeterminate |
| 0 evaluate all operations and constants just to the range and |
| precision of the type |
| 1 evaluate operations and constants of type float and double |
| to the range and precision of the double type, evaluate |
| long double operations and constants to the range and |
| precision of the long double type |
| 2 evaluate all operations and constants to the range and |
| precision of the long double type |
| |
| ??? This ought to change with the setting of the fp control word; |
| the value provided by the compiler assumes the widest setting. */ |
| #undef FLT_EVAL_METHOD |
| #define FLT_EVAL_METHOD __FLT_EVAL_METHOD__ |
| |
| /* 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, |
| |
| pmax * log10(b) if b is a power of 10 |
| ceil(1 + pmax * log10(b)) otherwise |
| */ |
| #undef DECIMAL_DIG |
| #define DECIMAL_DIG __DECIMAL_DIG__ |
| |
| #endif /* C99 */ |
| |
| #if defined (__STDC_VERSION__) && __STDC_VERSION__ > 199901L |
| /* Versions of DECIMAL_DIG for each floating-point type. */ |
| #undef FLT_DECIMAL_DIG |
| #undef DBL_DECIMAL_DIG |
| #undef LDBL_DECIMAL_DIG |
| #define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__ |
| #define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__ |
| #define LDBL_DECIMAL_DIG __DECIMAL_DIG__ |
| |
| /* Whether types support subnormal numbers. */ |
| #undef FLT_HAS_SUBNORM |
| #undef DBL_HAS_SUBNORM |
| #undef LDBL_HAS_SUBNORM |
| #define FLT_HAS_SUBNORM __FLT_HAS_DENORM__ |
| #define DBL_HAS_SUBNORM __DBL_HAS_DENORM__ |
| #define LDBL_HAS_SUBNORM __LDBL_HAS_DENORM__ |
| |
| /* Minimum positive values, including subnormals. */ |
| #undef FLT_TRUE_MIN |
| #undef DBL_TRUE_MIN |
| #undef LDBL_TRUE_MIN |
| #if __FLT_HAS_DENORM__ |
| #define FLT_TRUE_MIN __FLT_DENORM_MIN__ |
| #else |
| #define FLT_TRUE_MIN __FLT_MIN__ |
| #endif |
| #if __DBL_HAS_DENORM__ |
| #define DBL_TRUE_MIN __DBL_DENORM_MIN__ |
| #else |
| #define DBL_TRUE_MIN __DBL_MIN__ |
| #endif |
| #if __LDBL_HAS_DENORM__ |
| #define LDBL_TRUE_MIN __LDBL_DENORM_MIN__ |
| #else |
| #define LDBL_TRUE_MIN __LDBL_MIN__ |
| #endif |
| |
| #endif /* C1X */ |
| |
| #ifdef __STDC_WANT_DEC_FP__ |
| /* Draft Technical Report 24732, extension for decimal floating-point |
| arithmetic: Characteristic of decimal floating types <float.h>. */ |
| |
| /* Number of base-FLT_RADIX digits in the significand, p. */ |
| #undef DEC32_MANT_DIG |
| #undef DEC64_MANT_DIG |
| #undef DEC128_MANT_DIG |
| #define DEC32_MANT_DIG __DEC32_MANT_DIG__ |
| #define DEC64_MANT_DIG __DEC64_MANT_DIG__ |
| #define DEC128_MANT_DIG __DEC128_MANT_DIG__ |
| |
| /* Minimum exponent. */ |
| #undef DEC32_MIN_EXP |
| #undef DEC64_MIN_EXP |
| #undef DEC128_MIN_EXP |
| #define DEC32_MIN_EXP __DEC32_MIN_EXP__ |
| #define DEC64_MIN_EXP __DEC64_MIN_EXP__ |
| #define DEC128_MIN_EXP __DEC128_MIN_EXP__ |
| |
| /* Maximum exponent. */ |
| #undef DEC32_MAX_EXP |
| #undef DEC64_MAX_EXP |
| #undef DEC128_MAX_EXP |
| #define DEC32_MAX_EXP __DEC32_MAX_EXP__ |
| #define DEC64_MAX_EXP __DEC64_MAX_EXP__ |
| #define DEC128_MAX_EXP __DEC128_MAX_EXP__ |
| |
| /* Maximum representable finite decimal floating-point number |
| (there are 6, 15, and 33 9s after the decimal points respectively). */ |
| #undef DEC32_MAX |
| #undef DEC64_MAX |
| #undef DEC128_MAX |
| #define DEC32_MAX __DEC32_MAX__ |
| #define DEC64_MAX __DEC64_MAX__ |
| #define DEC128_MAX __DEC128_MAX__ |
| |
| /* The difference between 1 and the least value greater than 1 that is |
| representable in the given floating point type. */ |
| #undef DEC32_EPSILON |
| #undef DEC64_EPSILON |
| #undef DEC128_EPSILON |
| #define DEC32_EPSILON __DEC32_EPSILON__ |
| #define DEC64_EPSILON __DEC64_EPSILON__ |
| #define DEC128_EPSILON __DEC128_EPSILON__ |
| |
| /* Minimum normalized positive floating-point number. */ |
| #undef DEC32_MIN |
| #undef DEC64_MIN |
| #undef DEC128_MIN |
| #define DEC32_MIN __DEC32_MIN__ |
| #define DEC64_MIN __DEC64_MIN__ |
| #define DEC128_MIN __DEC128_MIN__ |
| |
| /* Minimum subnormal positive floating-point number. */ |
| #undef DEC32_SUBNORMAL_MIN |
| #undef DEC64_SUBNORMAL_MIN |
| #undef DEC128_SUBNORMAL_MIN |
| #define DEC32_SUBNORMAL_MIN __DEC32_SUBNORMAL_MIN__ |
| #define DEC64_SUBNORMAL_MIN __DEC64_SUBNORMAL_MIN__ |
| #define DEC128_SUBNORMAL_MIN __DEC128_SUBNORMAL_MIN__ |
| |
| /* The floating-point expression evaluation method. |
| -1 indeterminate |
| 0 evaluate all operations and constants just to the range and |
| precision of the type |
| 1 evaluate operations and constants of type _Decimal32 |
| and _Decimal64 to the range and precision of the _Decimal64 |
| type, evaluate _Decimal128 operations and constants to the |
| range and precision of the _Decimal128 type; |
| 2 evaluate all operations and constants to the range and |
| precision of the _Decimal128 type. */ |
| |
| #undef DEC_EVAL_METHOD |
| #define DEC_EVAL_METHOD __DEC_EVAL_METHOD__ |
| |
| #endif /* __STDC_WANT_DEC_FP__ */ |
| |
| #endif /* _FLOAT_H___ */ |
