bitfield

Overview ¶

Package bitfield provides bit-field access helpers.

Bit numbering: bit k of the memory at base is bit (k % 8) of byte (k / 8), where bit 0 of a byte is its least significant bit (little-endian bit allocation, as on x86-64 and AArch64).

Unsigned, Signed and Set require 1 <= width <= 64 and touch only the bytes that contain at least one bit of the range [off, off+width). A range of up to 64 bits can span 9 bytes when it is not byte-aligned; that case is handled explicitly. The helpers are not atomic.