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| author | Jeff Epler <jeff@adafruit.com> | 2020-10-27 11:47:44 -0500 |
|---|---|---|
| committer | Seon Rozenblum <seon@unexpectedmaker.com> | 2021-01-04 09:52:42 +1100 |
| commit | 2a5f3de1cdec92d412148cabaf605a750d238234 (patch) | |
| tree | 9c187db62ecbec0000b4533c95f4089901f3b5ae /py/objfloat.c | |
| parent | caca0609bdbc8f5b1b406fad19878505bb5492a5 (diff) | |
| parent | d0e54993e9546249911c2c380c870e6a7f2b9917 (diff) | |
Merge pull request #3608 from adafruit/6.0.x
Update main with latest 6.0.x
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 |