  instr wrMem selC ulaFunc selB wrReg
0 add     0    0    000    0     1  
1 sub     0    0    001    0     1  
2 xor     0    0    010    0     1  
3 or      0    0    011    0     1  
4 and     0    0    100    0     1  
5 sll     0    0    101    0     1  
6 srl     0    0    110    0     1  
7 sra     0    0    111    0     1  
8 addi    0    0    000    1     1  
9 lw      0    1    000    1     1  
a sw      1    X    000    1     0  
