1 files changed, 67 insertions, 0 deletions
diff --git a/scripts/smtbmc/notrap_validop.v b/scripts/smtbmc/notrap_validop.v
new file mode 100644
index 0000000..8e50304
--- /dev/null
+++ b/scripts/smtbmc/notrap_validop.v
@@ -0,0 +1,67 @@
+module testbench(input clk, mem_ready);
+	`include "opcode.v"
+
+	reg resetn = 0;
+	always @(posedge clk) resetn <= 1;
+
+	(* keep *) wire trap, mem_valid, mem_instr;
+	(* keep *) wire [3:0] mem_wstrb;
+	(* keep *) wire [31:0] mem_addr, mem_wdata, mem_rdata;
+	(* keep *) wire [35:0] trace_data;
+
+	reg [31:0] mem [0:2**30-1];
+
+	assign mem_rdata = mem[mem_addr >> 2];
+
+	always @(posedge clk) begin
+		if (resetn && mem_valid && mem_ready) begin
+			if (mem_wstrb[3]) mem[mem_addr >> 2][31:24] <= mem_wdata[31:24];
+			if (mem_wstrb[2]) mem[mem_addr >> 2][23:16] <= mem_wdata[23:16];
+			if (mem_wstrb[1]) mem[mem_addr >> 2][15: 8] <= mem_wdata[15: 8];
+			if (mem_wstrb[0]) mem[mem_addr >> 2][ 7: 0] <= mem_wdata[ 7: 0];
+		end
+	end
+
+	reg [1:0] mem_ready_stall = 0;
+
+	always @(posedge clk) begin
+		mem_ready_stall <= {mem_ready_stall, mem_valid && !mem_ready};
+		restrict(&mem_ready_stall == 0);
+
+		if (mem_instr && mem_ready && mem_valid) begin
+			assume(opcode_valid(mem_rdata));
+			assume(!opcode_branch(mem_rdata));
+			assume(!opcode_load(mem_rdata));
+			assume(!opcode_store(mem_rdata));
+		end
+
+		if (!mem_valid)
+			assume(!mem_ready);
+
+		if (resetn)
+			assert(!trap);
+	end
+
+	picorv32 #(
+		// change this settings as you like
+		.ENABLE_REGS_DUALPORT(1),
+		.TWO_STAGE_SHIFT(1),
+		.BARREL_SHIFTER(0),
+		.TWO_CYCLE_COMPARE(0),
+		.TWO_CYCLE_ALU(0),
+		.COMPRESSED_ISA(0),
+		.ENABLE_MUL(0),
+		.ENABLE_DIV(0)
+	) cpu (
+		.clk         (clk        ),
+		.resetn      (resetn     ),
+		.trap        (trap       ),
+		.mem_valid   (mem_valid  ),
+		.mem_instr   (mem_instr  ),
+		.mem_ready   (mem_ready  ),
+		.mem_addr    (mem_addr   ),
+		.mem_wdata   (mem_wdata  ),
+		.mem_wstrb   (mem_wstrb  ),
+		.mem_rdata   (mem_rdata  )
+	);
+endmodule