Synopsis
int __smuadx(int16x2 val1,
int16x2 val2);
Description
__smuadx inserts a SMUADX instruction. __smuadx returns the equivalent of
- res = val1[0] * val2[1] + val1[1] * val2[0]
where [0] is the lower 16 bits and [1] is the upper 16 bits.
This operation sets the Q flag if overflow occurs on the addition.