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parameter
LOW = 0,
HIGH = 1,
OP_CODE_LENGTH=3'd4,
AND = 4'b0000, // AND operation
ADD = 4'b0001, // ADD operation
SUB = 4'b0010, // SUB operation
ADDI = 4'b0011, // ADD Immediate
ANDI = 4'b0100, // AND Immediate
LW = 4'b0101, // Load Word
LoadByte = 4'b0110,
LBu = 4'b0110, // Load Byte unsigned
LBs = 4'b0110, // Load Byte signed
SW = 4'b0111, // Store Word
BranchGreater = 4'b1000, // Branch if Greater
BGT = 4'b1000, // Branch if Greater Than
BGTZ = 4'b1000, // Branch if Greater Than Zero
BranchLess = 4'b1001,
BLT = 4'b1001, // Branch if Less Than
BLTZ = 4'b1001, // Branch if Less Than Zero
BranchEqual = 4'b1010,
BEQ = 4'b1010, // Branch if Equal
BEQZ = 4'b1010, // Branch if Equal to Zero
BranchNotEqual = 4'b1011,
BNE = 4'b1011, // Branch if Not Equal
BNEZ = 4'b1011, // Branch if Not Equal to Zero
JMP = 4'b1100, // Jump
CALL = 4'b1101, // Call subroutine
RET = 4'b1110, // Return from subroutine
SV = 4'b1111, // Store value
R0 = 3'd0, // zero register
R1 = 3'd1, // general purpose register
R2 = 3'd2, // general purpose register
R3 = 3'd3, // general purpose register
R4 = 3'd4, // general purpose register
R5 = 3'd5, // general purpose register
R6 = 3'd6, // general purpose register
R7 = 3'd7, // general purpose register
ALU_OP_CODE_LENGTH=3'd2,
ALU_OP_AND = 2'b00,
ALU_OP_ADD = 2'b01,
ALU_OP_SUB = 2'b10;