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sucessfully simulate first 30 instructions

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still need to find a better solution to InstrAccessFault/DataAccessFault though
This commit is contained in:
Noah Boorstin 2021-01-23 19:01:44 -05:00
parent 71883dca82
commit 6d84658369
1 changed files with 29 additions and 17 deletions
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32
wally-pipelined/src/testbench-busybear.sv
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@ -37,15 +37,6 @@ module testbench_busybear #(parameter XLEN=64, MISA=32'h00000104, ZCSR = 1, ZCOU
$display("file couldn't be opened"); $display("file couldn't be opened");
$stop; $stop;
end end
// scan_file = $fscanf(data_file, "%x\n", read_data);
// $display("%x", read_data);
// scan_file = $fscanf(data_file, "%s\n", read_data);
// $display("%s", read_data);
// //if (!$feof(data_file)) begin
// // $display(read_data);
// //end
// end
end end
// read register trace file // read register trace file
@ -98,18 +89,39 @@ module testbench_busybear #(parameter XLEN=64, MISA=32'h00000104, ZCSR = 1, ZCOU
end end
end end
logic speculative, nextSpec;
initial begin
speculative = 0;
nextSpec = 0;
end
always @(PCF) begin always @(PCF) begin
speculative <= nextSpec;
if (speculative) begin
speculative <= (PCF != pcExpected);
end
if (~speculative) begin
// first read instruction // first read instruction
scan_file_PC = $fscanf(data_file_PC, "%x\n", InstrF); scan_file_PC = $fscanf(data_file_PC, "%x\n", InstrF);
// then expected PC value // then expected PC value
scan_file_PC = $fscanf(data_file_PC, "%x\n", pcExpected); scan_file_PC = $fscanf(data_file_PC, "%x\n", pcExpected);
// are we at a branch/jump?
case (InstrF[6:0]) //todo: add C versions of these
7'b1101111, //JAL
7'b1100111, //JALR
7'b1100011: //B
nextSpec <= 1;
default:
nextSpec <= 0;
endcase
//check things! //check things!
if (PCF !== pcExpected) begin if ((~nextSpec) && (PCF !== pcExpected)) begin
$display("%t ps: PC does not equal PC expected: %x, %x", $time, PCF, pcExpected); $display("%t ps: PC does not equal PC expected: %x, %x", $time, PCF, pcExpected);
// $stop; // $stop;
end end
end end
end
// Track names of instructions // Track names of instructions
string InstrFName, InstrDName, InstrEName, InstrMName, InstrWName; string InstrFName, InstrDName, InstrEName, InstrMName, InstrWName;