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|
`timescale 1ns / 1ps
module testbench;
parameter integer A0REG = 1;
parameter integer A1REG = 1;
parameter integer B0REG = 1;
parameter integer B1REG = 1;
parameter integer CREG = 1;
parameter integer DREG = 1;
parameter integer MREG = 1;
parameter integer PREG = 1;
parameter integer CARRYINREG = 1;
parameter integer CARRYOUTREG = 1;
parameter integer OPMODEREG = 1;
parameter CARRYINSEL = "OPMODE5";
parameter RSTTYPE = "SYNC";
reg CLK;
reg CEA, CEB, CEC, CED, CEM, CEP, CECARRYIN, CEOPMODE;
reg RSTA, RSTB, RSTC, RSTD, RSTM, RSTP, RSTCARRYIN, RSTOPMODE;
reg [17:0] A;
reg [17:0] B;
reg [47:0] C;
reg [17:0] D;
reg [47:0] PCIN;
reg [7:0] OPMODE;
reg CARRYIN;
output CARRYOUTF, REF_CARRYOUTF;
output CARRYOUT, REF_CARRYOUT, REF_OLD_CARRYOUT;
output [35:0] M, REF_M;
output [47:0] P, REF_P, REF_OLD_P;
output [17:0] BCOUT, REF_BCOUT, REF_OLD_BCOUT;
output [47:0] PCOUT, REF_PCOUT, REF_OLD_PCOUT;
integer errcount = 0;
reg ERROR_FLAG = 0;
task clkcycle;
begin
#5;
CLK = ~CLK;
#10;
CLK = ~CLK;
#2;
ERROR_FLAG = 0;
if (REF_BCOUT !== BCOUT || REF_OLD_BCOUT != BCOUT) begin
$display("ERROR at %1t: REF_BCOUT=%b REF_OLD_BCOUT=%b UUT_BCOUT=%b DIFF=%b", $time, REF_BCOUT, REF_OLD_BCOUT, BCOUT, REF_BCOUT ^ BCOUT);
errcount = errcount + 1;
ERROR_FLAG = 1;
end
if (REF_M !== M) begin
$display("ERROR at %1t: REF_M=%b UUT_M=%b DIFF=%b", $time, REF_M, M, REF_M ^ M);
errcount = errcount + 1;
ERROR_FLAG = 1;
end
if (REF_P !== P || REF_OLD_P != P) begin
$display("ERROR at %1t: REF_P=%b REF_OLD_P=%b UUT_P=%b DIFF=%b", $time, REF_P, REF_OLD_P, P, REF_P ^ P);
errcount = errcount + 1;
ERROR_FLAG = 1;
end
if (REF_PCOUT !== PCOUT || REF_OLD_PCOUT != PCOUT) begin
$display("ERROR at %1t: REF_PCOUT=%b REF_OLD_PCOUT=%b UUT_PCOUT=%b DIFF=%b", $time, REF_PCOUT, REF_OLD_PCOUT, PCOUT, REF_PCOUT ^ PCOUT);
errcount = errcount + 1;
ERROR_FLAG = 1;
end
if (REF_CARRYOUT !== CARRYOUT || (REF_OLD_CARRYOUT != CARRYOUT && !CARRYOUTREG)) begin
$display("ERROR at %1t: REF_CARRYOUT=%b REF_OLD_CARRYOUT=%b UUT_CARRYOUT=%b DIFF=%b", $time, REF_CARRYOUT, REF_OLD_CARRYOUT, CARRYOUT, REF_CARRYOUT ^ CARRYOUT);
errcount = errcount + 1;
ERROR_FLAG = 1;
end
if (REF_CARRYOUTF !== CARRYOUTF) begin
$display("ERROR at %1t: REF_CARRYOUTF=%b UUT_CARRYOUTF=%b", $time, REF_CARRYOUTF, CARRYOUTF);
errcount = errcount + 1;
ERROR_FLAG = 1;
end
#3;
end
endtask
reg config_valid = 0;
task drc;
begin
config_valid = 1;
if (OPMODE[1:0] == 2'b10 && PREG != 1) config_valid = 0;
if (OPMODE[3:2] == 2'b10 && PREG != 1) config_valid = 0;
end
endtask
initial begin
$dumpfile("test_dsp48a1_model.vcd");
$dumpvars(0, testbench);
#2;
CLK = 1'b0;
{CEA, CEB, CEC, CED, CEM, CEP, CECARRYIN, CEOPMODE} = 8'b11111111;
{A, B, C, D, PCIN, OPMODE, CARRYIN} = 0;
{RSTA, RSTB, RSTC, RSTD, RSTM, RSTP, RSTCARRYIN, RSTOPMODE} = 8'b11111111;
repeat (10) begin
#10;
CLK = 1'b1;
#10;
CLK = 1'b0;
#10;
CLK = 1'b1;
#10;
CLK = 1'b0;
end
{RSTA, RSTB, RSTC, RSTD, RSTM, RSTP, RSTCARRYIN, RSTOPMODE} = 0;
repeat (10000) begin
clkcycle;
config_valid = 0;
while (!config_valid) begin
A = $urandom;
B = $urandom;
C = {$urandom, $urandom};
D = $urandom;
PCIN = {$urandom, $urandom};
{CEA, CEB, CEC, CED, CEM, CEP, CECARRYIN, CEOPMODE} = $urandom | $urandom | $urandom;
{RSTA, RSTB, RSTC, RSTD, RSTM, RSTP, RSTCARRYIN, RSTOPMODE} = $urandom & $urandom & $urandom & $urandom & $urandom & $urandom;
{CARRYIN, OPMODE} = $urandom;
drc;
end
end
if (errcount == 0) begin
$display("All tests passed.");
$finish;
end else begin
$display("Caught %1d errors.", errcount);
$stop;
end
end
DSP48A #(
.A0REG (A0REG),
.A1REG (A1REG),
.B0REG (B0REG),
.B1REG (B1REG),
.CREG (CREG),
.DREG (DREG),
.MREG (MREG),
.PREG (PREG),
.CARRYINREG (CARRYINREG),
.OPMODEREG (OPMODEREG),
.CARRYINSEL (CARRYINSEL),
.RSTTYPE (RSTTYPE)
) ref_old (
.A (A),
.B (B),
.C (C),
.D (D),
.PCIN (PCIN),
.CARRYIN (CARRYIN),
.OPMODE (OPMODE),
.BCOUT (REF_OLD_BCOUT),
.CARRYOUT (REF_OLD_CARRYOUT),
.P (REF_OLD_P),
.PCOUT (REF_OLD_PCOUT),
.CEA (CEA),
.CEB (CEB),
.CEC (CEC),
.CED (CED),
.CEM (CEM),
.CEP (CEP),
.CECARRYIN (CECARRYIN),
.CEOPMODE (CEOPMODE),
.CLK (CLK),
.RSTA (RSTA),
.RSTB (RSTB),
.RSTC (RSTC),
.RSTD (RSTD),
.RSTM (RSTM),
.RSTP (RSTP),
.RSTCARRYIN (RSTCARRYIN),
.RSTOPMODE (RSTOPMODE)
);
DSP48A1 #(
.A0REG (A0REG),
.A1REG (A1REG),
.B0REG (B0REG),
.B1REG (B1REG),
.CREG (CREG),
.DREG (DREG),
.MREG (MREG),
.PREG (PREG),
.CARRYINREG (CARRYINREG),
.CARRYOUTREG (CARRYOUTREG),
.OPMODEREG (OPMODEREG),
.CARRYINSEL (CARRYINSEL),
.RSTTYPE (RSTTYPE)
) ref (
.A (A),
.B (B),
.C (C),
.D (D),
.PCIN (PCIN),
.CARRYIN (CARRYIN),
.OPMODE (OPMODE),
.BCOUT (REF_BCOUT),
.CARRYOUTF (REF_CARRYOUTF),
.CARRYOUT (REF_CARRYOUT),
.P (REF_P),
.M (REF_M),
.PCOUT (REF_PCOUT),
.CEA (CEA),
.CEB (CEB),
.CEC (CEC),
.CED (CED),
.CEM (CEM),
.CEP (CEP),
.CECARRYIN (CECARRYIN),
.CEOPMODE (CEOPMODE),
.CLK (CLK),
.RSTA (RSTA),
.RSTB (RSTB),
.RSTC (RSTC),
.RSTD (RSTD),
.RSTM (RSTM),
.RSTP (RSTP),
.RSTCARRYIN (RSTCARRYIN),
.RSTOPMODE (RSTOPMODE)
);
DSP48A1_UUT #(
.A0REG (A0REG),
.A1REG (A1REG),
.B0REG (B0REG),
.B1REG (B1REG),
.CREG (CREG),
.DREG (DREG),
.MREG (MREG),
.PREG (PREG),
.CARRYINREG (CARRYINREG),
.CARRYOUTREG (CARRYOUTREG),
.OPMODEREG (OPMODEREG),
.CARRYINSEL (CARRYINSEL),
.RSTTYPE (RSTTYPE)
) uut (
.A (A),
.B (B),
.C (C),
.D (D),
.PCIN (PCIN),
.CARRYIN (CARRYIN),
.OPMODE (OPMODE),
.BCOUT (BCOUT),
.CARRYOUTF (CARRYOUTF),
.CARRYOUT (CARRYOUT),
.P (P),
.M (M),
.PCOUT (PCOUT),
.CEA (CEA),
.CEB (CEB),
.CEC (CEC),
.CED (CED),
.CEM (CEM),
.CEP (CEP),
.CECARRYIN (CECARRYIN),
.CEOPMODE (CEOPMODE),
.CLK (CLK),
.RSTA (RSTA),
.RSTB (RSTB),
.RSTC (RSTC),
.RSTD (RSTD),
.RSTM (RSTM),
.RSTP (RSTP),
.RSTCARRYIN (RSTCARRYIN),
.RSTOPMODE (RSTOPMODE)
);
endmodule
module mult_noreg;
testbench #(
.A0REG (0),
.A1REG (0),
.B0REG (0),
.B1REG (0),
.CREG (0),
.DREG (0),
.MREG (0),
.PREG (0),
.CARRYINREG (0),
.CARRYOUTREG (0),
.OPMODEREG (0),
.CARRYINSEL ("CARRYIN"),
.RSTTYPE ("SYNC")
) testbench ();
endmodule
module mult_allreg;
testbench #(
.A0REG (1),
.A1REG (1),
.B0REG (1),
.B1REG (1),
.CREG (1),
.DREG (1),
.MREG (1),
.PREG (1),
.CARRYINREG (1),
.CARRYOUTREG (1),
.OPMODEREG (1),
.CARRYINSEL ("OPMODE5"),
.RSTTYPE ("SYNC")
) testbench ();
endmodule
module mult_inreg;
testbench #(
.A0REG (1),
.A1REG (1),
.B0REG (1),
.B1REG (1),
.CREG (1),
.DREG (1),
.MREG (0),
.PREG (0),
.CARRYINREG (1),
.CARRYOUTREG (0),
.OPMODEREG (0),
.CARRYINSEL ("CARRYIN"),
.RSTTYPE ("SYNC")
) testbench ();
endmodule
|
