Format: TSTMAX dest, destPredWrite, sourceLHS, sourceRHS.

Phase0: -

Phase1: -

Phase2: TSTMAX{.type} FTT, (P0|_), IS1{.F16}{.E0|.E1|.E2|.E3}, IS2{.F16}{.E0|.E1|.E2|.E3}

Description: Test maximum.

LHS >= RHS