vec_permi

Purpose

Returns a vector by permuting and combining the two eight-byte-long vector elements in a and b based on the value of c.

Syntax

d=vec_permi(a, b, c)

Result and argument types

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

d a b c
vector bool long long vector bool long long vector bool long long 0–3
vector signed long long vector signed long long vector signed long long
vector unsigned long long vector unsigned long long vector unsigned long long
vector double vector double vector double

Result value

If we use a[0] and a[1] to represent the first and second eight-byte-long elements in a, and use b[0] and b[1] for elements in b, then this function determines the elements in the result vector based on the binary value of c. This is illustrated as follows:
  • 00 - a[0], b[0]
  • 01 - a[0], b[1]
  • 10 - a[1], b[0]
  • 11 - a[1], b[1]