diff options
Diffstat (limited to 'py/mpconfig.h')
| -rw-r--r-- | py/mpconfig.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/py/mpconfig.h b/py/mpconfig.h index c316aa4b2..caa63fef3 100644 --- a/py/mpconfig.h +++ b/py/mpconfig.h @@ -861,6 +861,27 @@ typedef double mp_float_t; #define MICROPY_PY_BUILTINS_COMPLEX (MICROPY_PY_BUILTINS_FLOAT) #endif +// Float to string conversion implementations +// +// Note that the EXACT method is only available if the compiler supports +// floating points larger than mp_float_t: +// - with MICROPY_FLOAT_IMPL_FLOAT, the compiler needs to support `double` +// - with MICROPY_FLOAT_IMPL_DOUBLE, the compiler needs to support `long double` +// +#define MICROPY_FLOAT_FORMAT_IMPL_BASIC (0) // smallest code, but inexact +#define MICROPY_FLOAT_FORMAT_IMPL_APPROX (1) // slightly bigger, almost perfect +#define MICROPY_FLOAT_FORMAT_IMPL_EXACT (2) // bigger code, and 100% exact repr + +#ifndef MICROPY_FLOAT_FORMAT_IMPL +#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT +#define MICROPY_FLOAT_FORMAT_IMPL (MICROPY_FLOAT_FORMAT_IMPL_APPROX) +#elif defined(__SIZEOF_LONG_DOUBLE__) && __SIZEOF_LONG_DOUBLE__ > __SIZEOF_DOUBLE__ +#define MICROPY_FLOAT_FORMAT_IMPL (MICROPY_FLOAT_FORMAT_IMPL_EXACT) +#else +#define MICROPY_FLOAT_FORMAT_IMPL (MICROPY_FLOAT_FORMAT_IMPL_APPROX) +#endif +#endif + // Whether to use the native _Float16 for 16-bit float support #ifndef MICROPY_FLOAT_USE_NATIVE_FLT16 #ifdef __FLT16_MAX__ |