XL Fortran for AIX 8.1

Language Reference

+-------------------------------IBM Extension--------------------------------+


Returns the number of leading zero-bits in the binary representation of an integer.

must be of type integer.


Elemental function

Result Type and Attributes

Same as I.

Result Value

The result is the count of zero-bits to the left of the leftmost one-bit for an integer.


 I = LEADZ(0_4)  ! I=32
 J = LEADZ(4_4)  ! J=29
 K = LEADZ(-1_4) ! K=0

+----------------------------End of IBM Extension----------------------------+

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