From 9dbea36eac9a78cf324bba8d32a5cb2c9940d411 Mon Sep 17 00:00:00 2001 From: Dan Halbert Date: Wed, 25 Nov 2020 15:07:57 -0500 Subject: changed alarm.time API --- py/objfloat.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'py/objfloat.c') 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 -- cgit v1.2.3