diff options
Diffstat (limited to 'gnuradio-core/src/lib/general/gr_math.h')
| -rw-r--r-- | gnuradio-core/src/lib/general/gr_math.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/gnuradio-core/src/lib/general/gr_math.h b/gnuradio-core/src/lib/general/gr_math.h index 957a0e12aa..f1bd208b8c 100644 --- a/gnuradio-core/src/lib/general/gr_math.h +++ b/gnuradio-core/src/lib/general/gr_math.h @@ -174,4 +174,48 @@ static inline unsigned int gr_branchless_quad_45deg_slicer(gr_complex x) return gr_branchless_quad_45deg_slicer(x.real(), x.imag()); } +/*! + * \param x any value + * \param pow2 must be a power of 2 + * \returns \p x rounded down to a multiple of \p pow2. + */ +static inline size_t +gr_p2_round_down(size_t x, size_t pow2) +{ + return x & -pow2; +} + +/*! + * \param x any value + * \param pow2 must be a power of 2 + * \returns \p x rounded up to a multiple of \p pow2. + */ +static inline size_t +gr_p2_round_up(size_t x, size_t pow2) +{ + return gr_p2_round_down(x + pow2 - 1, pow2); +} + +/*! + * \param x any value + * \param pow2 must be a power of 2 + * \returns \p x modulo \p pow2. + */ +static inline size_t +gr_p2_modulo(size_t x, size_t pow2) +{ + return x & (pow2 - 1); +} + +/*! + * \param x any value + * \param pow2 must be a power of 2 + * \returns \p pow2 - (\p x modulo \p pow2). + */ +static inline size_t +gr_p2_modulo_neg(size_t x, size_t pow2) +{ + return pow2 - gr_p2_modulo(x, pow2); +} + #endif /* _GR_MATH_H_ */ |