Function bitfrob::u64_region_mask

pub const fn u64_region_mask(low: u32, high: u32) -> u64

Generates a bit mask where all bits in the region are 1.

The low and high values form an inclusive bit range where the mask bits are 1.

This is largely a helper function for other functions in this crate, but you can use it yourself if you think it’s useful.

Panics

• low and high must be less than the number of bits in the type.
• low must be less than or equal to high.

assert_eq!(u64_region_mask(0, 0), 0b0000_0001_u64);
assert_eq!(u64_region_mask(0, 1), 0b0000_0011_u64);
assert_eq!(u64_region_mask(0, 2), 0b0000_0111_u64);
assert_eq!(u64_region_mask(1, 3), 0b0000_1110_u64);
assert_eq!(u64_region_mask(4, 7), 0b1111_0000_u64);
assert_eq!(u64_region_mask(4, 4), 0b0001_0000_u64);