The llvm.hexagon.M2.mpyu.acc.hh.s1 intrinsic; known as __builtin_HEXAGON_M2_mpyu_acc_hh_s1 in GCC.
See Implementation
The llvm.hexagon.M2.mpyu.acc.hh.s1 intrinsic; known as __builtin_HEXAGON_M2_mpyu_acc_hh_s1 in GCC.