The following is a sequence of LEGv8 instructions.

(a) Complete the table. Each row of the table should contain the state of the registers

immediately after the instruction at the code line is completed. Stop after reaching

R.

Leave table entries blank until the first time a register is initialized/used.

Only make entries in the table when updating one of the four registers tracked (SP,

LR, X0, X7).

Assume in the beginning of the run (line J) the value of register SP is M.

(b) What does this procedure do?

J: J+4: R: ADDI XO, XZR, #2 BLP # some more code ... P: SUBI SP, SP, #16 P+4: STUR LR, [SP, #8] P+8: STUR XO, [SP, #0] P+12: SUBIS XZR, XO, , #2 P+16: B.GE L T: T+4: T+8: ADDI X7, XZR, #1 ADDI SP, SP, #16 BR LR L: L+4: SUB XO, XO, #1 BL P S: LDUR XO, [SP, #O] S+4: LDUR LR, [SP, #8] S+8: ADDI SP, SP, #16 S+12: MUL X7, X7, X0 S+16: BR LR PC SP LR XO X7