vec_cnttz

Purpose

Counts the least significant zero bits of each element of the given vector.

Note: This built-in function is valid only when the -mcpu option is set to target POWER9 processors or higher.

Syntax

d=vec_cnttz(a)

Result and argument types

The following table describes the types of the returned value and the function argument.

Table 1. Result and argument types
d a
vector signed char vector signed char
vector unsigned char vector unsigned char
vector signed short vector signed short
vector unsigned short vector unsigned short
vector signed int vector signed int
vector unsigned int vector unsigned int
vector signed long long vector signed long long
vector unsigned long long vector unsigned long long

Result value

The value of each element of the result is set to the number of trailing zeros of the corresponding element of a.