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https://github.com/openhwgroup/cvw
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Fix items related to testing of TestFloat that were not always matching. The issue resulted due to the repeat statement that interferes with the always block. I separated the two to allow them to work correctly
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@ -75,11 +75,13 @@ module testbenchfp;
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logic [P.CVTLEN-1:0] CvtLzcInE; // input to the Leading Zero Counter (priority encoder)
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logic IntZero;
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logic CvtResSgnE;
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logic [P.NE:0] CvtCalcExpE; // the calculated expoent
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logic [P.NE:0] CvtCalcExpE; // the calculated exponent
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logic [P.LOGCVTLEN-1:0] CvtShiftAmtE; // how much to shift by
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logic [P.DIVb:0] Quot;
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logic CvtResSubnormUfE;
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logic DivStart, FDivBusyE, OldFDivBusyE;
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logic DivStart;
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logic FDivBusyE;
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logic OldFDivBusyE;
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logic reset = 1'b0;
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logic [$clog2(P.NF+2)-1:0] XZeroCnt, YZeroCnt;
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logic [P.DURLEN-1:0] Dur;
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@ -107,10 +109,14 @@ module testbenchfp;
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logic [2:0] Funct3E;
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logic [2:0] Funct3M;
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logic FlushE;
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logic IFDivStartE, FDivDoneE;
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logic IFDivStartE;
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logic FDivDoneE;
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logic [P.NE+1:0] QeM;
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logic [P.DIVb:0] QmM;
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logic [P.XLEN-1:0] FIntDivResultM;
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logic ResMatch; // Check if result matches
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logic FlagMatch; // Check if flag matches
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logic CheckNow; // Final check
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///////////////////////////////////////////////////////////////////////////////////////////////
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@ -805,6 +811,7 @@ module testbenchfp;
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endcase
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end
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end
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always_comb begin
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// select the result to check
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case (UnitVal)
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@ -825,11 +832,22 @@ module testbenchfp;
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endcase
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end
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logic ResMatch, FlagMatch, CheckNow;
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always @(posedge clk)
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OldFDivBusyE = FDivDoneE;
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// For FP division this adds extra clock cycles to make sure the
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// computation completes. 18 clocks cycles are utilize to handle
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// Quad, but this can be changed for each precision to go faster.
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always @(posedge clk) begin
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// Add extra clock cycles in beginning for fdivsqrt to adequate reset state
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if(~(FDivBusyE|DivStart)|(UnitVal != `DIVUNIT)) begin
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repeat (18)
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@(posedge clk);
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if (reset != 1'b1)
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VectorNum += 1; // increment the vector
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end
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end
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// check results on falling edge of clk
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always @(negedge clk) begin
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@ -896,14 +914,13 @@ module testbenchfp;
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///////////////////////////////////////////////////////////////////////////////////////////////
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// check if result is correct
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// - wait till the division result is done or one extra cylcle for early termination (to simulate the EM pipline stage)
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ResMatch = (Res === Ans | NaNGood | NaNGood === 1'bx);
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FlagMatch = (ResFlg === AnsFlg | AnsFlg === 5'bx);
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divsqrtop = OpCtrlVal == `SQRT_OPCTRL | OpCtrlVal == `DIV_OPCTRL;
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// wait till the division result is done or one extra cylcle for early termination (to simulate the EM pipline stage)
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assign ResMatch = ((Res === Ans) | NaNGood | (NaNGood === 1'bx));
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assign FlagMatch = ((ResFlg === AnsFlg) | (AnsFlg === 5'bx));
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assign divsqrtop = (OpCtrlVal == `SQRT_OPCTRL) | (OpCtrlVal == `DIV_OPCTRL);
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assign DivDone = OldFDivBusyE & ~FDivBusyE;
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//assign divsqrtop = OpCtrl[TestNum] == `SQRT_OPCTRL | OpCtrl[TestNum] == `DIV_OPCTRL;
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CheckNow = (DivDone | ~divsqrtop) & (UnitVal !== `CVTINTUNIT)&(UnitVal !== `CMPUNIT);
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assign CheckNow = (DivDone | ~divsqrtop) & (UnitVal !== `CVTINTUNIT) & (UnitVal !== `CMPUNIT);
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if (~(ResMatch & FlagMatch) & CheckNow) begin
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errors += 1;
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$display("TestNum %d OpCtrl %d", TestNum, OpCtrl[TestNum]);
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@ -928,14 +945,6 @@ module testbenchfp;
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$stop;
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end
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// Add extra clock cycles in beginning for fdivsqrt to adequate reset state
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if(~(FDivBusyE|DivStart)|(UnitVal != `DIVUNIT)) begin
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repeat (12)
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@(posedge clk);
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if (reset != 1'b1)
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VectorNum += 1; // increment the vector
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end
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if (TestVectors[VectorNum][0] === 1'bx & Tests[TestNum] !== "") begin // if reached the eof
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// increment the test
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TestNum += 1;
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@ -994,11 +1003,13 @@ module readvectors (
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logic XEn, YEn, ZEn;
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logic FPUActive;
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// apply test vectors on rising edge of clk
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// Format of vectors Inputs(1/2/3)_AnsFlg
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always @(VectorNum) begin
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#1;
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// Initial delay is given to allow vector to work for fdiv
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// otherwise it will fail on first vector - fix needed (jes)
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DivStart = 1'b0;
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#20;
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AnsFlg = TestVector[4:0];
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DivStart = 1'b0;
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case (Unit)
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