--- valgrind-3.8.0/memcheck/mc_translate.c (revision 12883) +++ valgrind-3.8.0/memcheck/mc_translate.c (revision 12884) @@ -3313,6 +3313,8 @@ case Iop_DivModS128to64: return mkLazy2(mce, Ity_I128, vatom1, vatom2); + case Iop_8HLto16: + return assignNew('V', mce, Ity_I16, binop(op, vatom1, vatom2)); case Iop_16HLto32: return assignNew('V', mce, Ity_I32, binop(op, vatom1, vatom2)); case Iop_32HLto64: