3. Set Rounding Modes

(Requires knowledge of macros.) Write a macro that sets the FPU rounding mode. The single input parameter is a two-letter code:

• RE: Round to nearest even

• RD: Round down toward negative infinity

• RU: Round up toward positive infinity

• RZ: Round toward zero (truncate)

Sample macro calls (case should not matter):

mRound Re mRound rd mRound RU mRound rZ Write a short test program that uses the FIST (store integer) instruction to test each of the possible rounding modes.