_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE mix(__CLC_GENTYPE a, __CLC_GENTYPE b, __CLC_GENTYPE c);
#ifndef __CLC_SCALAR
_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE mix(__CLC_GENTYPE a, __CLC_GENTYPE b, __CLC_SCALAR_GENTYPE c);
#endif