Adding decode test

3 files changed, 74 insertions, 31 deletions

diff --git a/rtl/top/decode_test.sv b/rtl/top/decode_test.sv
new file mode 100644
index 0000000..f701aff
--- /dev/null
+++ b/rtl/top/decode_test.sv
@@ -0,0 +1,23 @@
+`timescale 1 ns / 1 ps
+
+module decode_test
+(
+    input  word            insn,
+	input  logic           n, z, c, v
+
+	output datapath_decode ctrl,
+	output psr_decode      psr_ctrl,
+	output branch_decode   branch_ctrl,
+	output snd_decode      snd_ctrl,
+	output data_decode     data_ctrl,
+	output ldst_decode     ldst_ctrl,
+	output mul_decode      mul_ctrl,
+	output coproc_decode   coproc_ctrl
+
+);
+    psr_flags nzcv;
+	assign {n, z, c, v} = nzcv;
+
+    core_decode DUT (.*);
+
+endmodule
\ No newline at end of file
diff --git a/tb/top/decode_test.cpp b/tb/top/decode_test.cpp
new file mode 100644
index 0000000..3d8589a
--- /dev/null
+++ b/tb/top/decode_test.cpp
@@ -0,0 +1,50 @@
+#include <cstdio>
+
+#include <verilated.h>
+#include <verilated_vcd_c.h>
+
+#include "Vdecode_test.h"               // From Verilating "top.v"
+
+int main(int argc, char** argv) {
+    Verilated::commandArgs(argc, argv);   // Remember args
+	Verilated::traceEverOn(true);
+
+	Vdecode_test top;
+	VerilatedVcdC trace;
+
+	top.trace(&trace, 0);
+	trace.open("decode_test.vcd");
+
+    int instructions[4] = {};
+    top.n = 0;
+    top.z = 0;
+    top.c = 0;
+    top.v = 0;
+
+    int clk_tick = 0;
+	int time = 0;
+
+	for(int i = 0; i < sizeof(instructions); ++i) 
+    {
+        top.insn = instructions[i];
+        top.n = 0;
+        top.z = 0;
+        top.c = 0;
+        top.v = 0;
+
+        top.eval();
+        trace.dump(time++);
+
+        std::printf(" [%c%c%c%c]\n",
+            top.n ? 'N' : 'n',
+            top.z ? 'Z' : 'z',
+            top.c ? 'C' : 'c',
+            top.v ? 'V' : 'v');
+
+        std::printf("insn=%d, ctrl=%d", 
+                    instructions[i], top.ctrl);
+    }
+
+	trace.close();
+    top.final();               // Done simulating
+}
diff --git a/tb/top/mul_test.cpp b/tb/top/mul_test.cpp
index 1dcebdc..cd99760 100644
--- a/tb/top/mul_test.cpp
+++ b/tb/top/mul_test.cpp
@@ -68,34 +68,4 @@ int main(int argc, char** argv) {
 
 	trace.close();
     top.final();               // Done simulating
-}
-
-/*
-
-module mul_tb();
-
-	logic clk,rst,start;
-	logic[7:0]X,Y;
-	logic[15:0]Z;
-	logic valid;
-
-	always #5 clk = ~clk;
-
-	core_mul_mul #(.W(8)) inst (.clk(clk),.rst(rst),.start(start),.a(X),.b(Y),.rdy(valid),.result(Z));
-
-	initial
-	$monitor($time,"a=%d, b=%d, ready=%d, Z=%d ",X,Y,valid,Z);
-	initial
-	begin
-	X=255;Y=150;clk=1'b1;rst=1'b0;start=1'b0;
-	#10 rst = 1'b1;
-	#10 start = 1'b1;
-	#10 start = 1'b0;
-	@valid
-	#10 X=-80;Y=-10;start = 1'b1;
-	#10 start = 1'b0;
-	end      
-endmodule
-
-
-*/
\ No newline at end of file
+}
\ No newline at end of file