Computer Architecture - Control Word

Micro- Operation	DA	AA	BA	MB	FS	MD	RW
R8 = R7 + LSR2(R3 -1)
R15 = (R2 2) (R6 + 6)
R6 = R9 LSR(R4 + R7 + 1)
R11 = (R4 3) (R6 + 2)
R3 = (R2 4) LSL2(R2)

Assume the CPU used in this section has 17 registers. n FS D data Write Daddress 2xn Register file A address B address A data B data Function Code m Constant in n n n MB select 1 0 MUXB Bus A Bus Bn Address out Data out B FS FA 0000 F+ A+1 0001 FA+B 0010 F+ A+B+1 0011 F+ A+B 0100 F+ A+B+1 0101 F A-1 0110 FA 0111 Ft AB 1000 FAB 1001 Ft AB 1010 F 1011 Ft B 1100 Fts B 1101 Fts1 B 1110 Function unit Z Data in 0 1 MD select MEXD Suggest how to execute the following instructions on the given CPU. Find the control words: 1. R8 = R7 + LSR2(R3-1) (LSR2: Linear shift right by 2 positions) 2. R15 = (R2 + 2) (R6 + 6) 3. R6 = R9 A LSR(R4 + R7 + 1) (LSR: linear shift right 1 position) 4. R11 = (R4 x 3) ^ (R6 + 2) 5. R3 = (R2 =4) LSL2(R2) (LSL2: Linear shift Left by 2 positions) Assume the CPU used in this section has 17 registers. n FS D data Write Daddress 2xn Register file A address B address A data B data Function Code m Constant in n n n MB select 1 0 MUXB Bus A Bus Bn Address out Data out B FS FA 0000 F+ A+1 0001 FA+B 0010 F+ A+B+1 0011 F+ A+B 0100 F+ A+B+1 0101 F A-1 0110 FA 0111 Ft AB 1000 FAB 1001 Ft AB 1010 F 1011 Ft B 1100 Fts B 1101 Fts1 B 1110 Function unit Z Data in 0 1 MD select MEXD Suggest how to execute the following instructions on the given CPU. Find the control words: 1. R8 = R7 + LSR2(R3-1) (LSR2: Linear shift right by 2 positions) 2. R15 = (R2 + 2) (R6 + 6) 3. R6 = R9 A LSR(R4 + R7 + 1) (LSR: linear shift right 1 position) 4. R11 = (R4 x 3) ^ (R6 + 2) 5. R3 = (R2 =4) LSL2(R2) (LSL2: Linear shift Left by 2 positions)