datapath

code/datapath.py

@@ -18,7 +18,6 @@ PC = 0
 
 
 def IF(BrPC, Brflush, stall, PC, IM):
-    PCplus4 = adder(PC, 4)
     if Brflush == '1':
         nPC = BrPC
     else:
@@ -39,7 +38,7 @@ def ID(PC, insn, RegWrite, Brflush, stall, REG, WB_data):
     opcode = insn[25:32]
     ALUSrc, MemtoReg, RegWritex, MemRead, MemWrite, ALUOp, Branch, JalrSel, RWSel = proc_controller(
         opcode)
-    ImmG = Imm_gen(insn)
+    ImmG = BintoInt(Imm_gen(insn))
     REG.write(RegWrite, rd, WB_data)
     RD1, RD2 = REG.read(rs1, rs2)
     return ALUSrc, MemtoReg, RegWritex, MemRead, MemWrite, ALUOp, Branch, JalrSel, RWSel, PC, RD1, RD2, ImmG, rs1, rs2, rd, funct3, funct7
@@ -56,7 +55,7 @@ def EX(ALUSrc, MemtoReg, RegWrite, MemRead, MemWrite, ALUOp, Branch, JalrSel,
     ALU_result = alu(tempA, tempB2, alu_ctrl)
     pc_plus_imm, pc_plus_4, branch_target, pc_sel = branch_unit(
         PC, ImmG, JalrSel, Branch, ALU_result)
-    return MemtoReg, RegWrite, MemWrite, RWSel, MemRead, pc_plus_imm, pc_plus_4, branch_target, pc_sel, ALU_result, rs1, rs2, rd, tempA, tempB, funct3, funct7
+    return MemtoReg, RegWrite, MemWrite, RWSel, MemRead, pc_plus_imm, pc_plus_4, branch_target, pc_sel, ALU_result, rs1, rs2, rd, tempA, tempB, funct3, funct7, stall
 
 
 MEMORY = data_mem()
@@ -64,7 +63,7 @@ MEMORY = data_mem()
 
 def MEM(MEMORY, MemtoReg, RegWrite, MemWrite, RWSel, MemRead, pc_plus_imm,
         pc_plus_4, ALU_result, rs1, rs2, rd, tempA, tempB, funct3, funct7):
-    data_out = MEMORY(MemWrite, MemRead, ALU_result, tempB, funct3)
+    data_out = MEMORY.mem(MemWrite, MemRead, ALU_result, tempB, funct3)
     return MemtoReg, RegWrite, RWSel, pc_plus_imm, pc_plus_4, data_out, tempB, rd
 
 
@@ -77,3 +76,133 @@ def WB(MemtoReg, RegWrite, RWSel, pc_plus_imm, pc_plus_4, data_out, tempB,
                                          mem_wb_rd, ex_mem_regwrite,
                                          mem_wb_regwrite)
     return WB_data, RegWrite, forward_a, forward_b
+
+
+def dataPath():
+    MemtoRegD = '0'
+    RegWriteD = '0'
+    RWSelD = '0' * 2
+    pc_plus_immD = 0
+    pc_plus_4D = 0
+    data_outD = 0
+    tempBD = 0
+    rdD = 0
+    rdC = 0
+    rs1B = 0
+    rs2B = 0
+    RegWriteC = '0'
+    MemtoRegC = '0'
+    MemWriteC = '0'
+    RWSelC = '0' * 2
+    MemReadC = '0'
+    pc_plus_immC = 0
+    pc_plus_4C = 0
+    ALU_resultC = 0
+    tempAC = 0
+    tempBC = 0
+    funct3C = '0' * 3
+    funct7C = '0' * 7
+    ALUSrcB = '0'
+    MemtoRegB = '0'
+    RegWriteB = '0'
+    MemReadB = '0'
+    MemWriteB = '0'
+    ALUOpB = '0' * 2
+    BranchB = '0'
+    JalrSelB = '0'
+    RWSelB = '0' * 2
+    PCB = 0
+    RD1B = 0
+    RD2B = 0
+    ImmGB = 0
+    rdB = 0
+    funct3B = '0' * 3
+    funct7B = '0' * 7
+    insnA = '0' * 32
+    ALU_resultB = 0
+    PCA = 0
+
+    while True:
+        WB_dataD, RegWriteD, forward_a, forward_b = WB(
+            MemtoRegD,
+            RegWriteD,
+            RWSelD,
+            pc_plus_immD,
+            pc_plus_4D,
+            data_outD,
+            tempBD,
+            ex_mem_rd=rdC,
+            mem_wb_rd=rdD,
+            ex_mem_rs1=rs1B,
+            ex_mem_rs2=rs2B,
+            ex_mem_regwrite=RegWriteC,
+            mem_wb_regwrite=RegWriteD)
+
+        MemtoRegC, RegWriteC, RWSelC, pc_plus_immC, pc_plus_4C, data_outC, tempBC, rdC = MEM(
+            MEMORY, MemtoRegC, RegWriteC, MemWriteC, RWSelC, MemReadC,
+            pc_plus_immC, pc_plus_4C, ALU_resultC, rs1B, rs2B, rdC, tempAC,
+            tempBC, funct3C, funct7C)
+
+        RegWriteD = RegWriteC
+        MemtoRegD = MemtoRegC
+        RWSelD = RWSelC
+        pc_plus_immD = pc_plus_immC
+        pc_plus_4D = pc_plus_4C
+        data_outD = data_outC
+        rdD = rdC
+        tempBD = tempBC
+
+        MemtoRegB, RegWriteB, MemWriteB, RWSelB, MemReadB, pc_plus_immB, pc_plus_4B, BrPC, Brflush, ALU_resultB, rs1B, rs2B, rdB, tempAB, tempBB, funct3B, funct7B, stall = EX(
+            ALUSrcB, MemtoRegB, RegWriteB, MemReadB, MemWriteB, ALUOpB,
+            BranchB, JalrSelB, RWSelB, PCB, RD1B, RD2B, ImmGB, rs1B, rs2B, rdB,
+            funct3B, funct7B, lastrs1=insnA[12:17], lastrs2=insnA[7:12], forwardA=forward_a, forwardB=forward_b,
+            WB_data=WB_dataD,
+            alu_out=ALU_resultB)
+
+        RegWriteC = RegWriteB
+        MemtoRegC = MemtoRegB
+        MemReadC = MemReadB
+        MemWriteC = MemWriteB
+        RWSelC = RWSelB
+        pc_plus_immC = pc_plus_immB
+        pc_plus_4C = pc_plus_4B
+        Imm_OutC = ImmGB
+        ALU_resultC = ALU_resultB
+        rdC = rdB
+        funct3C = funct3B
+        funct7C = funct7B
+        tempAC = tempAB
+        tempBC = tempBB
+
+        ALUSrc, MemtoReg, RegWritex, MemRead, MemWrite, ALUOp, Branch, JalrSel, RWSel, PCA, RD1, RD2, ImmG, rs1, rs2, rd, funct3, funct7 = ID(
+            PCA, insnA, RegWriteD, Brflush, stall, REG, WB_dataD)
+
+        ALUSrcB = ALUSrc
+        MemtoRegB = MemtoReg
+        RegWriteB = RegWritex
+        MemReadB = MemRead
+        MemWriteB = MemWrite
+        ALUOpB = ALUOp
+        BranchB = Branch
+        JalrSelB = JalrSel
+        RWSelB = RWSel
+        PCB = PCA
+        RD1B = RD1
+        RD2B = RD2
+        rs1B = insnA[12:17]
+        rs2B = insnA[7:12]
+        rdB = insnA[20:25]
+        ImmGB = ImmG
+        funct3B = insnA[17:20]
+        funct7B = insnA[0:7]
+        insnB = insnA
+
+        nPC, insn = IF(BrPC, Brflush, stall, PC, IM)
+        if Brflush == '1':
+            PCA = 4
+            insnA = '0' * 32
+        else:
+            PCA = nPC
+            insnA = insn
+        if insn == 32 * '0':
+            break