Function safe_arch::population_deposit_u32

#[must_use]pub fn population_deposit_u32(a: u32, index: u32) -> u32

This is supported with target feature bmi2 only.

Deposit contiguous low bits from a u32 according to a mask.

Other bits are zero.

assert_eq!(population_deposit_u32(0b1001, 0b1111), 0b1001);
assert_eq!(population_deposit_u32(0b1001, 0b1110), 0b0010);
assert_eq!(population_deposit_u32(0b1001, 0b1100), 0b0100);