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Bit Ranges

include/math/bit_range.h

Section titled “include/math/bit_range.h”

Defines

Section titled “Defines”

BIT_RANGE(val, lo, hi)

Section titled “BIT_RANGE(val, lo, hi)”
#define BIT_RANGE(val, lo, hi)                                                 \ (((val) >> (lo)) & ((1u << ((hi) - (lo) + 1)) - 1))

BIT_MASK(lo, hi)

Section titled “BIT_MASK(lo, hi)”
#define BIT_MASK(lo, hi) (((1u << ((hi) - (lo) + 1)) - 1) << (lo))

SET_FIELD(val, field_val, lo, hi)

Section titled “SET_FIELD(val, field_val, lo, hi)”
#define SET_FIELD(val, field_val, lo, hi)                                      \ (((val) & ~BIT_MASK(lo, hi)) | (((field_val) << (lo)) & BIT_MASK(lo, hi)))