| /* Helper macros for type generic function implementations within libm. |
| Copyright (C) 2016-2018 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_TYPE_MACROS |
| #define _MATH_TYPE_MACROS |
| |
| /* Each type imports a header which is expected to |
| define: |
| |
| M_LIT(x) - Paste the type specific suffix onto the constant x. |
| M_MLIT(x) - Paste the type specific suffix used by the macro |
| constants in math.h, i.e M_PI or M_PIl. |
| M_PFX - The prefixed used by float.h macros like FLT_MANT_DIG. |
| M_SUF(x) - Paste the the type specific suffix used by functions |
| i.e expf expl exp. |
| FLOAT - Resolves to the C typename of M_TYPE. |
| CFLOAT - Resolves to the complex typename of M_TYPE. |
| M_STRTO_NAN - Resolves to the internal libc function which |
| converts a string into the appropriate FLOAT nan |
| value. |
| |
| declare_mgen_alias(from,to) |
| This exposes the appropriate symbol(s) for a |
| function f of type FLOAT. |
| |
| declare_mgen_alias_r(from,to) |
| This exposes the appropriate symbol(s) for a |
| function f_r of type FLOAT. */ |
| |
| #ifndef M_PFX |
| # error "M_PFX must be defined." |
| #endif |
| #ifndef M_LIT |
| # error "M_LIT must be defined." |
| #endif |
| #ifndef M_MLIT |
| # error "M_MLIT must be defined." |
| #endif |
| #ifndef M_SUF |
| # error "M_SUF must be defined." |
| #endif |
| #ifndef FLOAT |
| # error "FLOAT must be defined." |
| #endif |
| #ifndef CFLOAT |
| # error "CFLOAT must be defined." |
| #endif |
| #ifndef declare_mgen_alias |
| # error "declare_mgen_alias must be defined." |
| #endif |
| #ifndef declare_mgen_alias_r |
| # error "declare_mgen_alias_r must be defined." |
| #endif |
| |
| #define __M_CONCAT(a,b) a ## b |
| #define __M_CONCATX(a,b) __M_CONCAT(a,b) |
| |
| #define M_NAN M_SUF (__builtin_nan) ("") |
| #define M_MIN_EXP __M_CONCATX (M_PFX, _MIN_EXP) |
| #define M_MAX_EXP __M_CONCATX (M_PFX, _MAX_EXP) |
| #define M_MIN __M_CONCATX (M_PFX, _MIN) |
| #define M_MAX __M_CONCATX (M_PFX, _MAX) |
| #define M_MANT_DIG __M_CONCATX (M_PFX, _MANT_DIG) |
| #define M_HUGE_VAL (M_SUF (__builtin_huge_val) ()) |
| |
| /* Helper macros for commonly used functions. */ |
| #define M_COPYSIGN M_SUF (__copysign) |
| #define M_FABS M_SUF (fabs) |
| #define M_SINCOS M_SUF (__sincos) |
| #define M_SCALBN M_SUF (__scalbn) |
| #define M_LOG1P M_SUF (__log1p) |
| |
| #define M_ATAN2 M_SUF (__ieee754_atan2) |
| #define M_COSH M_SUF (__ieee754_cosh) |
| #define M_EXP M_SUF (__ieee754_exp) |
| #define M_HYPOT M_SUF (__ieee754_hypot) |
| #define M_LOG M_SUF (__ieee754_log) |
| #define M_SINH M_SUF (__ieee754_sinh) |
| #define M_SQRT M_SUF (__ieee754_sqrt) |
| |
| /* Needed to evaluate M_MANT_DIG below. */ |
| #include <float.h> |
| |
| /* Use a special epsilon value for IBM long double |
| to avoid spurious overflows/underflows. */ |
| #if M_MANT_DIG != 106 |
| # define M_EPSILON __M_CONCATX (M_PFX, _EPSILON) |
| #else |
| # define M_EPSILON M_LIT (0x1p-106) |
| #endif |
| |
| /* Enable overloading of function name to assist reuse. */ |
| #ifndef M_DECL_FUNC |
| # define M_DECL_FUNC(f) M_SUF (f) |
| #endif |
| |
| #endif /* _MATH_TYPE_MACROS */ |