Module bits

Utilities for bit manipulation.

Functions

contains_ones_byte_u16

Returns true if the unsigned 16-bit integer contains one or more bytes which have all bits set.

contains_ones_byte_u32

Returns true if the unsigned 32-bit integer contains one or more bytes which have all bits set.

contains_ones_byte_u64

Returns true if the unsigned 64-bit integer contains one or more bytes which have all bits set.

mask_at

Masks the bit at the specified bit index.

mask_lower

Masks all bits with an index less than idx.

mask_lower_eq

Masks all bits with an index less than or equal to idx.

mask_range

Masks out all bits in positions less than upper, but greater than or equal to lower (upper < bit <= lower)

mask_upper

Masks all bits with an index greater than idx.

mask_upper_eq

Masks all bits with an index greater than or equal to idx.

sign_extend_leq8_to_i8

Sign extends an arbitrary, 8-bit or less, signed two’s complement integer stored within an u8 to a full width i8.

sign_extend_leq16_to_i16

Sign extends an arbitrary, 16-bit or less, signed two’s complement integer stored within an u16 to a full width i16.

sign_extend_leq32_to_i32

Sign extends an arbitrary, 32-bit or less, signed two’s complement integer stored within an u32 to a full width i32.

sign_extend_leq64_to_i64

Sign extends an arbitrary, 64-bit or less, signed two’s complement integer stored within an u64 to a full width i64.

trailing_ones_u8

Returns the number of trailing ones in an unsigned 8-bit integer.

trailing_ones_u16

Returns the number of trailing ones in an unsigned 16-bit integer.

trailing_ones_u32

Returns the number of trailing ones in an unsigned 32-bit integer.

trailing_ones_u64

Returns the number of trailing ones in an unsigned 64-bit integer.