Based on the first operand of the first step of the execute stage in Figures 4.18 to 4.21, write an HCL description for the signal aluB in SEQ.

Figures 4.18

Figures 4.21

Transcribed Image Text:

Stage Fetch Decode Execute Memory Write back PC update OPq rA, rB icode: ifun rA:B ← M₁ [PC] M₁ [PC + 1] valp PC+2 valA - R[rA] valB ← R[RB] valEvalB OP valA Set CC R[rB] ←valE PC - valP rrmovą rA, rB icode: ifun TA:rB valp PC+2 valA - R[RA] valE - M₁[PC] M₁[PC + 1] PC - 0 + valA R[RB] valE valP irmovą V, rB icode: ifun + M₁[PC] rA:rB ← M₁[PC + 1] valc ← Mg[PC + 2] valp ← PC + 10 valE 0+ valC R[RB] 4 valE PC - valp