1 /* AVR-GCC does not have real double datatype. Instead its double
2 * is equal to float, i.e. 32 bit value. If you need to communicate
3 * with other systems that use double in their .proto files, you
4 * need to do some conversion.
6 * These functions use bitwise operations to mangle floats into doubles
7 * and then store them in uint64_t datatype.
10 #ifndef DOUBLE_CONVERSION
11 #define DOUBLE_CONVERSION
15 /* Convert native 4-byte float into a 8-byte double. */
16 extern uint64_t float_to_double(float value);
18 /* Convert 8-byte double into native 4-byte float.
19 * Values are rounded to nearest, 0.5 away from zero.
20 * Overflowing values are converted to Inf or -Inf.
22 extern float double_to_float(uint64_t value);