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Diffstat (limited to 'include/consts.vh')
| -rw-r--r-- | include/consts.vh | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/include/consts.vh b/include/consts.vh new file mode 100644 index 0000000..49133a7 --- /dev/null +++ b/include/consts.vh @@ -0,0 +1,108 @@ +parameter ALU_A_SRC_PC = 2'b00; +parameter ALU_A_SRC_PC_BUF = 2'b01; +parameter ALU_A_SRC_RD1_BUF = 2'b10; +parameter ALU_A_SRC_0 = 2'b11; + +parameter ALU_B_SRC_RD2_BUF = 2'b00; +parameter ALU_B_SRC_IMM = 2'b01; +parameter ALU_B_SRC_4 = 2'b10; + +parameter RESULT_SRC_ALU_RESULT_BUF = 2'b00; +parameter RESULT_SRC_DATA_BUF = 2'b01; +parameter RESULT_SRC_ALU_RESULT = 2'b10; + +parameter MEM_ADDR_SRC_PC = 1'b0; +parameter MEM_ADDR_SRC_RESULT = 1'b1; + +parameter ARITHMETIC_OP_ADD = 2'b00; +parameter ARITHMETIC_OP_SUB = 2'b01; +parameter ARITHMETIC_OP_SLT = 2'b10; +parameter ARITHMETIC_OP_SLTU = 2'b11; + +parameter LOGIC_OP_AND = 2'b00; +parameter LOGIC_OP_OR = 2'b01; +parameter LOGIC_OP_XOR = 2'b10; + +parameter SHIFT_OP_SLL = 2'b00; +parameter SHIFT_OP_SRL = 2'b01; +parameter SHIFT_OP_SRA = 2'b11; + +parameter ALU_OP_ARITHMETIC = 2'b00; +parameter ALU_OP_LOGIC = 2'b01; +parameter ALU_OP_SHIFT = 2'b10; + +parameter ALU_OP_ADD = { ALU_OP_ARITHMETIC, ARITHMETIC_OP_ADD }; +parameter ALU_OP_SUB = { ALU_OP_ARITHMETIC, ARITHMETIC_OP_SUB }; +parameter ALU_OP_SLT = { ALU_OP_ARITHMETIC, ARITHMETIC_OP_SLT }; +parameter ALU_OP_SLTU = { ALU_OP_ARITHMETIC, ARITHMETIC_OP_SLTU }; +parameter ALU_OP_AND = { ALU_OP_LOGIC, LOGIC_OP_AND }; +parameter ALU_OP_OR = { ALU_OP_LOGIC, LOGIC_OP_OR }; +parameter ALU_OP_XOR = { ALU_OP_LOGIC, LOGIC_OP_XOR }; +parameter ALU_OP_SLL = { ALU_OP_SHIFT, SHIFT_OP_SLL }; +parameter ALU_OP_SRL = { ALU_OP_SHIFT, SHIFT_OP_SRL }; +parameter ALU_OP_SRA = { ALU_OP_SHIFT, SHIFT_OP_SRA }; + +parameter STATE_FETCH = 4'h0; +parameter STATE_DECODE = 4'h1; +parameter STATE_MEM_ADDR = 4'h2; +parameter STATE_MEM_LOAD = 4'h3; +parameter STATE_MEM_STORE = 4'h4; +parameter STATE_MEM_WB = 4'h5; +parameter STATE_EXECUTE_R = 4'h6; +parameter STATE_EXECUTE_I = 4'h7; +parameter STATE_JAL = 4'h8; +parameter STATE_JALR = 4'h9; +parameter STATE_LUI = 4'ha; +parameter STATE_ALU_WB = 4'hb; +parameter STATE_AUIPC = 4'hc; +parameter STATE_BRANCH = 4'hd; + +parameter INSTR_FORMAT_UNKNOWN = 3'b000; +parameter INSTR_FORMAT_R = 3'b001; +parameter INSTR_FORMAT_I = 3'b010; +parameter INSTR_FORMAT_S = 3'b011; +parameter INSTR_FORMAT_B = 3'b100; +parameter INSTR_FORMAT_U = 3'b101; +parameter INSTR_FORMAT_J = 3'b110; + +parameter OPCODE_LUI = 7'b0110111; +parameter OPCODE_AUIPC = 7'b0010111; +parameter OPCODE_JAL = 7'b1101111; +parameter OPCODE_JALR = 7'b1100111; +parameter OPCODE_BRANCH = 7'b1100011; +parameter OPCODE_LOAD = 7'b0000011; +parameter OPCODE_STORE = 7'b0100011; +parameter OPCODE_IMM = 7'b0010011; +parameter OPCODE_REG = 7'b0110011; +parameter OPCODE_SYNC = 7'b0001111; +parameter OPCODE_SYS = 7'b1110011; + +parameter FUNCT3_LS_B = 3'b000; +parameter FUNCT3_LS_H = 3'b001; +parameter FUNCT3_LS_W = 3'b010; +parameter FUNCT3_LS_BU = 3'b100; +parameter FUNCT3_LS_HU = 3'b101; + +parameter FUNCT3_ALU_ADD_SUB = 3'b000; +parameter FUNCT3_ALU_SLT = 3'b010; +parameter FUNCT3_ALU_SLTU = 3'b011; +parameter FUNCT3_ALU_XOR = 3'b100; +parameter FUNCT3_ALU_OR = 3'b110; +parameter FUNCT3_ALU_AND = 3'b111; +parameter FUNCT3_ALU_SLL = 3'b001; +parameter FUNCT3_ALU_SR = 3'b101; + +parameter FUNCT3_BRANCH_BEQ = 3'b000; +parameter FUNCT3_BRANCH_BNE = 3'b001; +parameter FUNCT3_BRANCH_BLT = 3'b100; +parameter FUNCT3_BRANCH_BGE = 3'b101; +parameter FUNCT3_BRANCH_BLTU = 3'b110; +parameter FUNCT3_BRANCH_BGEU = 3'b111; + +parameter FUNCT7_ALU_ADD = 7'b0000000; +parameter FUNCT7_ALU_SUB = 7'b0100000; +parameter FUNCT7_ALU_SRL = 7'b0000000; +parameter FUNCT7_ALU_SRA = 7'b0100000; + +parameter ALU_CTRL_OP = 1'b0; +parameter ALU_CTRL_ADD = 1'b1;
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