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Rounding up and Down

include/math/round.h View source View on GitHub

Macros

Section titled “Macros”

ROUND_UP

Section titled “ROUND_UP”
#define ROUND_UP(x, y) (((x) + (y) - 1) / (y))

ROUND_DOWN

Section titled “ROUND_DOWN”
#define ROUND_DOWN(x, y) ((x) / (y))

ROUND

Section titled “ROUND”
#define ROUND(x, y) (((x) + ((y) / 2)) / (y))

ROUND_UP_TO_POWER_OF_2

Section titled “ROUND_UP_TO_POWER_OF_2”
#define ROUND_UP_TO_POWER_OF_2(x) (1 << (32 - __builtin_clz(x - 1)))

ROUND_DOWN_TO_POWER_OF_2

Section titled “ROUND_DOWN_TO_POWER_OF_2”
#define ROUND_DOWN_TO_POWER_OF_2(x) (1 << (31 - __builtin_clz(x)))

ROUND_TO_POWER_OF_2

Section titled “ROUND_TO_POWER_OF_2”
#define ROUND_TO_POWER_OF_2(x) (1 << (32 - __