Whetstone was run on a Sun 3/75 using the F77 compiler with optimization turned on. The Sun 3/75 is based on a Motorola 68020 running at 16.67 MHz, and it includes a floating point coprocessor. The Sun compiler allows the floating point to be calculated with the coprocessor or using software routines, depending on compiler flags. A single iteration of Whetstone took 1.08 seconds using the coprocessor and 13.6 seconds using software. Assume
that the CPI using the coprocessor was measured to be 10, while the CPI using soft- ware was measured to be 6.