If
E1 has an unsigned type, the value of the result
is
E1×2E2, reduced modulo
one more than the maximum value representable in the result type
. Otherwise, if
E1 has a signed type and non-negative value, and
E1×2E2 is
representable in the corresponding unsigned type of the result type, then
that value, converted to the result type, is the resulting value; otherwise, the
behavior is undefined
.