diff options
Diffstat (limited to 'py/objfloat.c')
| -rw-r--r-- | py/objfloat.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/py/objfloat.c b/py/objfloat.c index f544ade05..80f10e816 100644 --- a/py/objfloat.c +++ b/py/objfloat.c @@ -3,7 +3,7 @@ * * The MIT License (MIT) * - * Copyright (c) 2013, 2014 Damien P. George + * SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal @@ -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 |