vec_sum2s

Purpose

Returns a vector containing the results of performing a sum across 1/2 vector operation on two given vectors.

Syntax

d=vec_sum2s(a, b)

Result and argument types

The type of d, a, and b must be vector signed int.

Result value

The first and third elements of d are 0. The second element of d contains the saturated sum of the first and second elements of a and the second element of b. The fourth element of d contains the saturated sum of the third and fourth elements of a and the fourth element of b.

d[0] = 0
d[1] = a[0] + a[1] + b[1]
d[2] = 0
d[3] = a[2] + a[3] + b[3]