float_helpers.h (897B)
1 /* 2 * Common Float Helpers 3 * 4 * Copyright (c) 2019 Linaro 5 * 6 * SPDX-License-Identifier: GPL-3.0-or-later 7 */ 8 9 #include <inttypes.h> 10 11 /* Some hosts do not have support for all of these; not required by ISO C. */ 12 #ifndef FE_OVERFLOW 13 #define FE_OVERFLOW 0 14 #endif 15 #ifndef FE_UNDERFLOW 16 #define FE_UNDERFLOW 0 17 #endif 18 #ifndef FE_DIVBYZERO 19 #define FE_DIVBYZERO 0 20 #endif 21 #ifndef FE_INEXACT 22 #define FE_INEXACT 0 23 #endif 24 #ifndef FE_INVALID 25 #define FE_INVALID 0 26 #endif 27 28 /* Number of constants in each table */ 29 int get_num_f16(void); 30 int get_num_f32(void); 31 int get_num_f64(void); 32 33 /* Accessor helpers, overflows will automatically wrap */ 34 uint16_t get_f16(int i); /* use _Float16 when we can */ 35 float get_f32(int i); 36 double get_f64(int i); 37 38 /* Return format strings, free after use */ 39 char * fmt_f16(uint16_t); 40 char * fmt_f32(float); 41 char * fmt_f64(double); 42 /* exception flags */ 43 char * fmt_flags(void);