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executeblock.sv
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executeblock.sv
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`include "param_mod.sv"
class goldenref_execute;
virtual dut_Probe_Exec dut_exec;
//internal signals
logic [3:0] internal_execute_opcode;
//logic [15:0] dut_exec.internal_execute_alu1;
//logic [15:0] dut_exec.internal_execute_alu2;
logic [1:0] internal_execute_pcselect1;
logic internal_execute_pcselect2;
logic [15:0] internal_execute_imm5;
logic [15:0] internal_execute_offset6;
logic [15:0] internal_execute_offset9;
logic [15:0] internal_execute_offset11;
logic [15:0] internal_execute_pcout1;
logic [15:0] internal_execute_pcout2;
logic [15:0] mdata_int;
int flag_aluout;
function new(virtual dut_Probe_Exec dut_exec);
this.dut_exec=dut_exec;
this.flag_aluout = 0;
endfunction
task run();
fork
/*begin
forever
begin
//@(posedge dut_exec.execute_clk);
//#1
if(dut_exec.execute_reset) //reset = 1
begin
dut_exec.goldenref_sr1=3'b0;
dut_exec.goldenref_sr2=3'b0;
end
else // reset = 0
begin
dut_exec.goldenref_sr1 = dut_exec.execute_IR[8:6];
if(dut_exec.execute_IR[15:12] == ADDX || dut_exec.execute_IR[15:12] == ANDX || dut_exec.execute_IR[15:12] == NOTX )
begin
dut_exec.goldenref_sr2 = dut_exec.execute_IR[2:0];
//$display($time, "inside ALU");
end
else if(dut_exec.execute_IR[15:12] == STX || dut_exec.execute_IR[15:12] == STRX || dut_exec.execute_IR[15:12] == STIX)
dut_exec.goldenref_sr2 = dut_exec.execute_IR[11:9];
else
dut_exec.goldenref_sr2 = 3'b0;
end
end
end*/
begin
forever
begin
@(posedge dut_exec.execute_clk);
#1
if(dut_exec.execute_reset) //reset = 1
begin
dut_exec.goldenref_NZP=3'b0;
@(posedge dut_exec.execute_clk);
//#1
dut_exec.goldenref_sr1=3'b0;
dut_exec.goldenref_sr2=3'b0;
end
else // reset = 0
begin
dut_exec.goldenref_sr1 = dut_exec.execute_IR[8:6];
if(dut_exec.execute_IR[15:12] == ADDX || dut_exec.execute_IR[15:12] == ANDX || dut_exec.execute_IR[15:12] == NOTX )
begin
dut_exec.goldenref_sr2 = dut_exec.execute_IR[2:0];
//$display($time, "inside ALU");
end
else if(dut_exec.execute_IR[15:12] == STX || dut_exec.execute_IR[15:12] == STRX || dut_exec.execute_IR[15:12] == STIX)
dut_exec.goldenref_sr2 = dut_exec.execute_IR[11:9];
else
dut_exec.goldenref_sr2 = 3'b0;
end
#5
if(dut_exec.execute_reset) // reset = 1
begin
dut_exec.goldenref_W_Control_out=2'b0;
dut_exec.goldenref_Mem_Control_out=1'b0;
dut_exec.goldenref_aluout=16'b0;
dut_exec.goldenref_pcout=16'b0;
dut_exec.goldenref_dr=3'b0;
dut_exec.goldenref_IR_Exec=16'b0;
dut_exec.goldenref_NZP=3'b0;
dut_exec.goldenref_M_Data =16'b0;
dut_exec.internal_execute_alu1 =16'b0;
dut_exec.internal_execute_alu2 =16'b0;
internal_execute_imm5 =16'b0;
internal_execute_offset6 =16'b0;
internal_execute_offset9 =16'b0;
internal_execute_offset11 =16'b0;
internal_execute_pcout1 =16'b0;
internal_execute_pcout2 =16'b0;
end
else // reset = 0
begin
internal_execute_imm5 = {{11{dut_exec.execute_IR[4]}},dut_exec.execute_IR[4:0]};
internal_execute_offset6 = {{10{dut_exec.execute_IR[5]}},dut_exec.execute_IR[5:0]};
internal_execute_offset9 = {{7{dut_exec.execute_IR[8]}},dut_exec.execute_IR[8:0]};
internal_execute_offset11 = {{5{dut_exec.execute_IR[10]}},dut_exec.execute_IR[10:0]};
internal_execute_pcselect1 = dut_exec.execute_E_control[3:2];
internal_execute_pcselect2 = dut_exec.execute_E_control[1];
internal_execute_opcode = dut_exec.execute_IR[15:12];
//PCOUT1
case (internal_execute_pcselect1)
2'b00:internal_execute_pcout1 = internal_execute_offset11;
2'b01:internal_execute_pcout1 = internal_execute_offset9;
2'b10:internal_execute_pcout1 = internal_execute_offset6;
2'b11:internal_execute_pcout1 = 0;
endcase
//PCOUT2
if (internal_execute_pcselect2)
internal_execute_pcout2 = dut_exec.execute_npc_in - 1;
else
begin
if(dut_exec.execute_bypass_mem_1)
internal_execute_pcout2 = dut_exec.execute_Mem_Bypass_Val;
else if(dut_exec.execute_bypass_alu_1)
internal_execute_pcout2 = dut_exec.goldenref_aluout;
else
internal_execute_pcout2 = dut_exec.execute_VSR1;
end
//ALUIN1
if(dut_exec.execute_bypass_mem_1)
dut_exec.internal_execute_alu1 = dut_exec.execute_Mem_Bypass_Val;
else if(dut_exec.execute_bypass_alu_1)
dut_exec.internal_execute_alu1 = dut_exec.goldenref_aluout;
else
dut_exec.internal_execute_alu1 = dut_exec.execute_VSR1;
//ALUIN2
if(dut_exec.execute_E_control[0] == 1'b0)
dut_exec.internal_execute_alu2 = internal_execute_imm5;
else
begin
if(dut_exec.execute_bypass_mem_2)
dut_exec.internal_execute_alu2 = dut_exec.execute_Mem_Bypass_Val;
else if(dut_exec.execute_bypass_alu_2)
dut_exec.internal_execute_alu2 = dut_exec.goldenref_aluout;
else
dut_exec.internal_execute_alu2 = dut_exec.execute_VSR2;
end
//MData
if(dut_exec.execute_enable_execute && dut_exec.execute_bypass_alu_2)
begin
flag_aluout = 1;
dut_exec.goldenref_M_Data = dut_exec.goldenref_aluout;
end
/*else if(flag_aluout == 1)
begin
flag_aluout = 0;
dut_exec.goldenref_M_Data = mdata_int;
end*/
if(dut_exec.execute_enable_execute && !dut_exec.execute_bypass_alu_2)
dut_exec.goldenref_M_Data = dut_exec.execute_VSR2;
//Synchronous signals
if(dut_exec.execute_enable_execute) // enable = 1
begin
dut_exec.goldenref_W_Control_out = dut_exec.execute_W_Control_in;
dut_exec.goldenref_Mem_Control_out = dut_exec.execute_Mem_Control_in;
dut_exec.goldenref_IR_Exec = dut_exec.execute_IR;
//ALUOUT
case(dut_exec.execute_E_control[5:4])
2'b00: dut_exec.goldenref_aluout = dut_exec.internal_execute_alu1+dut_exec.internal_execute_alu2;
2'b01: dut_exec.goldenref_aluout = dut_exec.internal_execute_alu1&dut_exec.internal_execute_alu2;
2'b10: dut_exec.goldenref_aluout = ~(dut_exec.internal_execute_alu1);
endcase
dut_exec.goldenref_pcout = internal_execute_pcout1+internal_execute_pcout2;
if(internal_execute_opcode == ADDX || internal_execute_opcode == ANDX || internal_execute_opcode == NOTX)
dut_exec.goldenref_pcout = dut_exec.goldenref_aluout;
else
dut_exec.goldenref_aluout = dut_exec.goldenref_pcout;
//Destination register
if(internal_execute_opcode == ADDX || internal_execute_opcode == ANDX || internal_execute_opcode == NOTX ||
internal_execute_opcode == LDX || internal_execute_opcode == LDRX || internal_execute_opcode == LDIX ||
internal_execute_opcode == LEAX)
dut_exec.goldenref_dr = dut_exec.execute_IR[11:9];
else
dut_exec.goldenref_dr = 0;
//NZP
if(internal_execute_opcode == BRX)
dut_exec.goldenref_NZP = dut_exec.execute_IR[11:9];
else if(internal_execute_opcode == JMPX)
dut_exec.goldenref_NZP = 3'b111;
else
dut_exec.goldenref_NZP = 0;
end
else // enable = 0
begin
dut_exec.goldenref_W_Control_out = dut_exec.goldenref_W_Control_out;
dut_exec.goldenref_Mem_Control_out = dut_exec.goldenref_Mem_Control_out;
dut_exec.goldenref_IR_Exec = dut_exec.goldenref_IR_Exec;
dut_exec.goldenref_dr = dut_exec.goldenref_dr;
dut_exec.goldenref_NZP = 0;
dut_exec.goldenref_pcout = dut_exec.goldenref_pcout;
dut_exec.goldenref_aluout = dut_exec.goldenref_aluout;
dut_exec.goldenref_M_Data = dut_exec.goldenref_M_Data;
end
end
end
end
join
endtask : run
task checker_execute_sync();
forever
begin
@(posedge dut_exec.execute_clk);
#1
if(dut_exec.goldenref_W_Control_out !== dut_exec.execute_W_Control_out && dut_exec.execute_reset==0)
$display($time,"In Execute stage Golden reference value of W Control out %h and value from DUT of W Control out %h dont match", dut_exec.goldenref_W_Control_out, dut_exec.execute_W_Control_out);
if(dut_exec.goldenref_Mem_Control_out !== dut_exec.execute_Mem_Control_out && dut_exec.execute_reset==0)
$display($time,"In Execute stage Golden reference value of Mem Control out %h and value from DUT of Mem Control out %h dont match", dut_exec.goldenref_Mem_Control_out, dut_exec.execute_Mem_Control_out);
if(dut_exec.goldenref_aluout !== dut_exec.execute_aluout && dut_exec.execute_reset==0)
$display($time,"In Execute stage Golden reference value of ALU out %h and value from DUT of ALU out %h dont match",dut_exec.goldenref_aluout,dut_exec.execute_aluout);
if(dut_exec.goldenref_pcout !== dut_exec.execute_pcout && dut_exec.execute_reset==0)
$display($time,"In Execute stage Golden reference value of PCOUT %h and value from DUT of PCOUT %h dont match",dut_exec.goldenref_pcout,dut_exec.execute_pcout);
if(dut_exec.goldenref_dr !== dut_exec.execute_dr && dut_exec.execute_reset==0)
$display($time,"In Execute stage Golden reference value of Destination Register %h and value from DUT of Destination Register %h dont match",dut_exec.goldenref_dr,dut_exec.execute_dr);
if(dut_exec.goldenref_IR_Exec !== dut_exec.execute_IR_Exec && dut_exec.execute_reset==0)
$display($time,"In Execute stage Golden reference value of IR EXEC %h and value from DUT of IR EXEC %h dont match",dut_exec.goldenref_IR_Exec,dut_exec.execute_IR_Exec);
if(dut_exec.goldenref_NZP !== dut_exec.execute_NZP && dut_exec.execute_reset==0)
$display($time,"In Execute stage Golden reference value of NZP %h and value from DUT of NZP %h dont match",dut_exec.goldenref_NZP,dut_exec.execute_NZP);
if(dut_exec.goldenref_M_Data !== dut_exec.execute_M_Data && dut_exec.execute_reset==0)
$display($time,"In Execute stage Golden reference value of M Data %h and value from DUT of M Data %h dont match",dut_exec.goldenref_M_Data,dut_exec.execute_M_Data);
end
endtask : checker_execute_sync
task checker_execute_async();
forever
begin
@(negedge dut_exec.execute_clk);
if(dut_exec.goldenref_sr1 !== dut_exec.execute_sr1)
$display($time,"In Execute stage Golden reference value of Source Register 1 %h and value from DUT of Source Register 1 %h dont match",dut_exec.goldenref_sr1,dut_exec.execute_sr1);
if(dut_exec.goldenref_sr2 !== dut_exec.execute_sr2)
$display($time,"In Execute stage Golden reference value of Source Register 2 %h and value from DUT of Source Register 2 %h dont match",dut_exec.goldenref_sr2,dut_exec.execute_sr2);
end
endtask : checker_execute_async
endclass:goldenref_execute