ALU_OP_WIDTH = 4

ALU_OP_ADD = 0
ALU_OP_SLL = 1
ALU_OP_XOR = 4
ALU_OP_OR = 6
ALU_OP_AND = 7
ALU_OP_SRL = 5
ALU_OP_SEQ = 8
ALU_OP_SNE = 9
ALU_OP_SUB = 10
ALU_OP_SRA = 11
ALU_OP_SLT = 12
ALU_OP_SGE = 13
ALU_OP_SLTU = 14
ALU_OP_SGEU = 15
