The llvm.hexagon.M2.mpyud.ll.s1 intrinsic; known as __builtin_HEXAGON_M2_mpyud_ll_s1 in GCC.
See Implementation
The llvm.hexagon.M2.mpyud.ll.s1 intrinsic; known as __builtin_HEXAGON_M2_mpyud_ll_s1 in GCC.