Question
Consider the following LEGv8 loop: LOOP: SUBIS X1, X1, #0 B.LE DONE SUBI X1, X1, #1 ADDI X0, X0, #2 B LOOP DONE: Where SUBIS
Consider the following LEGv8 loop: LOOP: SUBIS X1, X1, #0 B.LE DONE SUBI X1, X1, #1 ADDI X0, X0, #2 B LOOP DONE: Where SUBIS means: Subtract and set flags Immediate. - Assume that the register X1 is initialized to the value 10. What is the final value in register X0 assuming the X0 is initially zero? - For the loop above, write the equivalent C code. Assume that the registers X0, and X1 are integers j and i respectively. - For the loop written in LEGv8 assembly above, assume that the register X1 is initialized to the value N. How many LEGv8 instructions are executed? - For the loop written in LEGv8 assembly above, replace the instruction B.LE DONE with B.MI DONE. What is the final value in register X0 assuming the X0 is initially zero? Note B.MI = Branch on minus. - For the loop written in LEGv8 assembly above, replace the instruction B.LE DONE instruction with B.MI DONE and write equivalent C code
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