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Add first draft of functional SB_MAC16 model

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Signed-off-by: Clifford Wolf <clifford@clifford.at>
This commit is contained in:
Clifford Wolf 2019-02-19 13:42:21 +01:00
parent 5a853ed46c
commit 62493c91b2
4 changed files with 467 additions and 53 deletions
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199
techlibs/ice40/tests/test_dsp_model.v Normal file
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`timescale 1ns / 1ps
module testbench;
parameter [0:0] NEG_TRIGGER = 0;
parameter [0:0] C_REG = 0;
parameter [0:0] A_REG = 0;
parameter [0:0] B_REG = 0;
parameter [0:0] D_REG = 0;
parameter [0:0] TOP_8x8_MULT_REG = 0;
parameter [0:0] BOT_8x8_MULT_REG = 0;
parameter [0:0] PIPELINE_16x16_MULT_REG1 = 0;
parameter [0:0] PIPELINE_16x16_MULT_REG2 = 0;
parameter [1:0] TOPOUTPUT_SELECT = 0;
parameter [1:0] TOPADDSUB_LOWERINPUT = 2;
parameter [0:0] TOPADDSUB_UPPERINPUT = 1;
parameter [1:0] TOPADDSUB_CARRYSELECT = 2;
parameter [1:0] BOTOUTPUT_SELECT = 0;
parameter [1:0] BOTADDSUB_LOWERINPUT = 2;
parameter [0:0] BOTADDSUB_UPPERINPUT = 1;
parameter [1:0] BOTADDSUB_CARRYSELECT = 2;
parameter [0:0] MODE_8x8 = 0;
parameter [0:0] A_SIGNED = 0;
parameter [0:0] B_SIGNED = 0;
reg CLK, CE;
reg [15:0] C, A, B, D;
reg AHOLD, BHOLD, CHOLD, DHOLD;
reg IRSTTOP, IRSTBOT;
reg ORSTTOP, ORSTBOT;
reg OLOADTOP, OLOADBOT;
reg ADDSUBTOP, ADDSUBBOT;
reg OHOLDTOP, OHOLDBOT;
reg CI, ACCUMCI, SIGNEXTIN;
output [31:0] REF_O, UUT_O;
output REF_CO, REF_ACCUMCO, REF_SIGNEXTOUT;
output UUT_CO, UUT_ACCUMCO, UUT_SIGNEXTOUT;
integer errcount = 0;
task clkcycle;
begin
#5;
CLK = ~CLK;
#10;
CLK = ~CLK;
#2;
if (REF_O !== UUT_O) begin
$display("ERROR at %1t: REF_O=%b UUT_O=%b", $time, REF_O, UUT_O);
errcount = errcount + 1;
end
if (REF_CO !== UUT_CO) begin
$display("ERROR at %1t: REF_CO=%b UUT_CO=%b", $time, REF_CO, UUT_CO);
errcount = errcount + 1;
end
if (REF_ACCUMCO !== UUT_ACCUMCO) begin
$display("ERROR at %1t: REF_ACCUMCO=%b UUT_ACCUMCO=%b", $time, REF_ACCUMCO, UUT_ACCUMCO);
errcount = errcount + 1;
end
if (REF_SIGNEXTOUT !== UUT_SIGNEXTOUT) begin
$display("ERROR at %1t: REF_SIGNEXTOUT=%b UUT_SIGNEXTOUT=%b", $time, REF_SIGNEXTOUT, UUT_SIGNEXTOUT);
errcount = errcount + 1;
end
#3;
end
endtask
initial begin
$dumpfile("test_dsp_model.vcd");
$dumpvars(0, testbench);
#5;
CLK = NEG_TRIGGER;
CE = 1;
{C, A, B, D} = 0;
{AHOLD, BHOLD, CHOLD, DHOLD} = 0;
{IRSTTOP, IRSTBOT} = 0;
{ORSTTOP, ORSTBOT} = 0;
{OLOADTOP, OLOADBOT} = 0;
{ADDSUBTOP, ADDSUBBOT} = 0;
{OHOLDTOP, OHOLDBOT} = 0;
{CI, ACCUMCI, SIGNEXTIN} = 0;
// C = 10;
// A = 15;
// B = 22;
// D = 27;
repeat (10) clkcycle;
if (errcount == 0) begin
$display("All tests passed.");
end else begin
$display("Caught %1d errors.", errcount);
end
end
SB_MAC16 #(
.NEG_TRIGGER (NEG_TRIGGER ),
.C_REG (C_REG ),
.A_REG (A_REG ),
.B_REG (B_REG ),
.D_REG (D_REG ),
.TOP_8x8_MULT_REG (TOP_8x8_MULT_REG ),
.BOT_8x8_MULT_REG (BOT_8x8_MULT_REG ),
.PIPELINE_16x16_MULT_REG1 (PIPELINE_16x16_MULT_REG1),
.PIPELINE_16x16_MULT_REG2 (PIPELINE_16x16_MULT_REG2),
.TOPOUTPUT_SELECT (TOPOUTPUT_SELECT ),
.TOPADDSUB_LOWERINPUT (TOPADDSUB_LOWERINPUT ),
.TOPADDSUB_UPPERINPUT (TOPADDSUB_UPPERINPUT ),
.TOPADDSUB_CARRYSELECT (TOPADDSUB_CARRYSELECT ),
.BOTOUTPUT_SELECT (BOTOUTPUT_SELECT ),
.BOTADDSUB_LOWERINPUT (BOTADDSUB_LOWERINPUT ),
.BOTADDSUB_UPPERINPUT (BOTADDSUB_UPPERINPUT ),
.BOTADDSUB_CARRYSELECT (BOTADDSUB_CARRYSELECT ),
.MODE_8x8 (MODE_8x8 ),
.A_SIGNED (A_SIGNED ),
.B_SIGNED (B_SIGNED )
) ref (
.CLK (CLK ),
.CE (CE ),
.C (C ),
.A (A ),
.B (B ),
.D (D ),
.AHOLD (AHOLD ),
.BHOLD (BHOLD ),
.CHOLD (CHOLD ),
.DHOLD (DHOLD ),
.IRSTTOP (IRSTTOP ),
.IRSTBOT (IRSTBOT ),
.ORSTTOP (ORSTTOP ),
.ORSTBOT (ORSTBOT ),
.OLOADTOP (OLOADTOP ),
.OLOADBOT (OLOADBOT ),
.ADDSUBTOP (ADDSUBTOP ),
.ADDSUBBOT (ADDSUBBOT ),
.OHOLDTOP (OHOLDTOP ),
.OHOLDBOT (OHOLDBOT ),
.CI (CI ),
.ACCUMCI (ACCUMCI ),
.SIGNEXTIN (SIGNEXTIN ),
.O (REF_O ),
.CO (REF_CO ),
.ACCUMCO (REF_ACCUMCO ),
.SIGNEXTOUT (REF_SIGNEXTOUT)
);
SB_MAC16_UUT #(
.NEG_TRIGGER (NEG_TRIGGER ),
.C_REG (C_REG ),
.A_REG (A_REG ),
.B_REG (B_REG ),
.D_REG (D_REG ),
.TOP_8x8_MULT_REG (TOP_8x8_MULT_REG ),
.BOT_8x8_MULT_REG (BOT_8x8_MULT_REG ),
.PIPELINE_16x16_MULT_REG1 (PIPELINE_16x16_MULT_REG1),
.PIPELINE_16x16_MULT_REG2 (PIPELINE_16x16_MULT_REG2),
.TOPOUTPUT_SELECT (TOPOUTPUT_SELECT ),
.TOPADDSUB_LOWERINPUT (TOPADDSUB_LOWERINPUT ),
.TOPADDSUB_UPPERINPUT (TOPADDSUB_UPPERINPUT ),
.TOPADDSUB_CARRYSELECT (TOPADDSUB_CARRYSELECT ),
.BOTOUTPUT_SELECT (BOTOUTPUT_SELECT ),
.BOTADDSUB_LOWERINPUT (BOTADDSUB_LOWERINPUT ),
.BOTADDSUB_UPPERINPUT (BOTADDSUB_UPPERINPUT ),
.BOTADDSUB_CARRYSELECT (BOTADDSUB_CARRYSELECT ),
.MODE_8x8 (MODE_8x8 ),
.A_SIGNED (A_SIGNED ),
.B_SIGNED (B_SIGNED )
) uut (
.CLK (CLK ),
.CE (CE ),
.C (C ),
.A (A ),
.B (B ),
.D (D ),
.AHOLD (AHOLD ),
.BHOLD (BHOLD ),
.CHOLD (CHOLD ),
.DHOLD (DHOLD ),
.IRSTTOP (IRSTTOP ),
.IRSTBOT (IRSTBOT ),
.ORSTTOP (ORSTTOP ),
.ORSTBOT (ORSTBOT ),
.OLOADTOP (OLOADTOP ),
.OLOADBOT (OLOADBOT ),
.ADDSUBTOP (ADDSUBTOP ),
.ADDSUBBOT (ADDSUBBOT ),
.OHOLDTOP (OHOLDTOP ),
.OHOLDBOT (OHOLDBOT ),
.CI (CI ),
.ACCUMCI (ACCUMCI ),
.SIGNEXTIN (SIGNEXTIN ),
.O (UUT_O ),
.CO (UUT_CO ),
.ACCUMCO (UUT_ACCUMCO ),
.SIGNEXTOUT (UUT_SIGNEXTOUT)
);
endmodule