diff options
| author | Dan Halbert <halbert@halwitz.org> | 2020-11-25 15:07:57 -0500 |
|---|---|---|
| committer | Dan Halbert <halbert@halwitz.org> | 2020-11-25 15:09:27 -0500 |
| commit | 9dbea36eac9a78cf324bba8d32a5cb2c9940d411 (patch) | |
| tree | 7d54888455af9db4599a9928b709859296924a01 /py/objfloat.c | |
| parent | f868cc5dd02319957500180541281f41ec0d0573 (diff) | |
changed alarm.time API
Diffstat (limited to 'py/objfloat.c')
| -rw-r--r-- | py/objfloat.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/py/objfloat.c b/py/objfloat.c index 59f1eb2f6..80f10e816 100644 --- a/py/objfloat.c +++ b/py/objfloat.c @@ -333,6 +333,13 @@ mp_obj_t mp_obj_float_binary_op(mp_binary_op_t op, mp_float_t lhs_val, mp_obj_t return mp_obj_new_float(lhs_val); } +// Convert a uint64_t to a 32-bit float without invoking the double-precision math routines, +// which are large. +mp_float_t uint64_to_float(uint64_t ui64) { + // 4294967296 = 2^32 + return (mp_float_t) ((uint32_t) (ui64 >> 32) * 4294967296.0f + (uint32_t) (ui64 & 0xffffffff)); +} + #pragma GCC diagnostic pop #endif // MICROPY_PY_BUILTINS_FLOAT |