Returns the number of leading zero bits in the binary representation of an integer.
Elemental function
Same as I.
The result is the count of zero bits to the left of the leftmost one bit for I. If I has the value zero, the result is BIT_SIZE(I).
I = LEADZ(0_4) ! I=32
J = LEADZ(4_4) ! J=29
K = LEADZ(-1) ! K=0
M = LEADZ(0_8) ! M=64
N = LEADZ(1_8) ! N=63