Function bitintr::arm::v8::cls

pub fn cls<T: Int>(x: T) -> T

Counts the leading most significant bits set.

When all bits of the operand are set it returns the size of the operand in bits.

Keywords: count leading sign bits, count leading ones, count leading bits set.

Assembly Instructions

• CLS:
  • Description: Count leading sign bits.
  • Architecture: ARMv8.
  • Registers: 32/64 bits.

Example

use bitintr::arm::v8::*;

let n = 0b1111_1111_1100_1010u16;

assert_eq!(n.cls(), 10);
assert_eq!(cls(0b1111_1111u8), 8);