diff options
Diffstat (limited to 'Include/pymath.h')
| -rw-r--r-- | Include/pymath.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Include/pymath.h b/Include/pymath.h index f869724334..63ca972784 100644 --- a/Include/pymath.h +++ b/Include/pymath.h @@ -227,4 +227,12 @@ PyAPI_FUNC(void) _Py_set_387controlword(unsigned short); * behavior. */ #define _Py_InIntegralTypeRange(type, v) (_Py_IntegralTypeMin(type) <= v && v <= _Py_IntegralTypeMax(type)) +/* Return the smallest integer k such that n < 2**k, or 0 if n == 0. + * Equivalent to floor(log2(x))+1. Also equivalent to: bitwidth_of_type - + * count_leading_zero_bits(x) + */ +#ifndef Py_LIMITED_API +PyAPI_FUNC(unsigned int) _Py_bit_length(unsigned long d); +#endif + #endif /* Py_PYMATH_H */ |