This intrinsic inserts a UQSUB16 instruction into the instruction stream generated by the compiler. It enables you to perform two unsigned 16-bit integer subtractions, saturating the results to the 16-bit unsigned integer range 0 ≤ x ≤ 2¹⁶ - 1.

unsigned int __uqsub16(unsigned int val1, unsigned int val2)

Where:

The __uqsub16 intrinsic returns:

The results are saturated to the 16-bit unsigned integer range 0 ≤ x ≤ 2¹⁶ - 1.

Example:

unsigned int subtract_halfwords(unsigned int val1, unsigned int val2)
{
  unsigned int res;

    res = __uqsub16(val1,val2); /* res[15:0] = val1[15:0] - val2[15:0]
                                   res[31:16] = val1[31:16] - val2[31:16]
                                */
    return res;
}