__vpmsumw
Purpose
Performs the exclusive-OR operation on each even-odd pair of the polynomial-multiplication result of corresponding elements.
Prototype
vector unsigned int __vpmsumw (vector unsigned int a, vector unsigned int b);
Result
For each i (0 <= i < 4), let prod[i] be the result of polynomial multiplication of word elements i of a and b.
For
each i (0 <= i < 2), each
doubleword element i of the result is set as follows:
- Bit 0 is set to 0.
- Bits 1 - 63 are set to prod[2*i] (xor) prod[2*i+1].
