This intrinsic inserts a UXTB16 instruction into the instruction stream generated by the compiler. It enables you to extract two 8-bit values from an operand and zero-extend them to 16 bits each.

unsigned int __uxtb16(unsigned int val)

where val[7:0] and val[23:16] hold the two 8-bit values to be zero-extended.

The __uxtb16 intrinsic returns the 8-bit values zero-extended to 16-bit values.

Example:

unsigned int zero_extend(unsigned int val)
{
  unsigned int res;

    res = __uxtb16(val1,val2); /* res[15:0] = ZeroExtended(val[7:0])
                                  res[31:16] = ZeroExtended(val[23:16])
                                */
    return res;
}