Verilog update

6 files changed, 407 insertions, 0 deletions

diff --git a/verilog/alu/v3/Makefile b/verilog/alu/v3/Makefile
new file mode 100644
index 0000000..11821cb
--- /dev/null
+++ b/verilog/alu/v3/Makefile
@@ -0,0 +1,35 @@
+PROJ=alu3
+VERION:=r0.2
+RM = rm -rf
+COPY = cp -a
+PATH_SEP = /
+
+
+crab: ${PROJ}.dfu
+
+dfu: ${PROJ}.dfu
+	dfu-util -D $<
+
+
+%.json: %.v
+	yosys -p "read_verilog $<; synth_ecp5 -top ${PROJ} -json $@"
+
+%_out.config: %.json
+	nextpnr-ecp5 --json $< --textcfg $@ --25k --package CSFBGA285 --lpf crab.pcf
+
+%.bit: %_out.config
+	ecppack --compress --freq 38.8 --input $< --bit $@
+
+%.dfu : %.bit
+	$(COPY) $< $@
+	dfu-suffix -v 1209 -p 5af0 -a $@
+
+sim:
+	verilator -Wall --cc --exe --build tbalu.cpp alu.v --trace && ./obj_dir/Valu > out
+simclean:
+	rm -rf obj_dir/* out
+
+clean:
+	$(RM) -f ${PROJ}.bit ${PROJ}_out.config ${PROJ}.json ${PROJ}.dfu
+
+.PHONY: prog clean
diff --git a/verilog/alu/v3/alu3.v b/verilog/alu/v3/alu3.v
new file mode 100644
index 0000000..556b226
--- /dev/null
+++ b/verilog/alu/v3/alu3.v
@@ -0,0 +1,41 @@
+`default_nettype none
+`timescale 1us/1ns
+
+`include "aluOp.vh"
+
+module alu3
+(
+input wire [31:0] alu_in_1,
+input wire[31:0] alu_in_2,
+input wire[3:0] alu_op_i,
+output wire[31:0] alu_output
+);
+
+
+wire [31:0] diff = alu_in_1 - alu_in_1;
+reg [31:0] result;
+
+always @ (*)
+begin
+	case(alu_op_i)
+		`ADD: result = alu_in_1 + alu_in_2;
+		`SUB: result = diff;
+		`XOR: result = alu_in_1 ^ alu_in_2;
+		`OR: result = alu_in_1 | alu_in_2;
+		`AND: result = alu_in_1 & alu_in_2;
+		`SLL: result = alu_in_1 >> alu_in_2;
+		`SRL: result = alu_in_1 << alu_in_2;
+		`SLTU: result = (alu_in_1 < alu_in_2 ? 32'b1 : 32'b0);
+		`NONE: result = alu_in_1;
+		`SLT: result = (alu_in_1[31] == alu_in_2[31] ? (diff[31] == 1'b0 ? 32'b0 : 32'b1) : (alu_in_1[31] == 1'b1 ? 32'b1 : 32'b0));
+		`SRA: result = 
+		(alu_in_1 >> alu_in_2) |
+		(alu_in_1[31] == 1'b0 ? 32'b0 :
+		(32'hFFFFFFFF << {~alu_in_2[4], ~alu_in_2[3], ~alu_in_2[2], ~alu_in_2[1], ~alu_in_2[0]}));
+		default: result = 32'b0;
+	endcase
+end
+
+assign alu_output = result;
+
+endmodule
diff --git a/verilog/alu/v3/aluOp.h b/verilog/alu/v3/aluOp.h
new file mode 100644
index 0000000..999dac2
--- /dev/null
+++ b/verilog/alu/v3/aluOp.h
@@ -0,0 +1,16 @@
+#ifndef ALU_OP
+#define ALU_OP
+
+#define ADD             0
+#define SUB             8
+#define XOR             4
+#define OR              6
+#define AND             7
+#define SLL             1
+#define SRL             5
+#define SRA             13
+#define SLT             2
+#define SLTU            3
+#define NONE            15
+
+#endif
diff --git a/verilog/alu/v3/aluOp.vh b/verilog/alu/v3/aluOp.vh
new file mode 100644
index 0000000..b6e916f
--- /dev/null
+++ b/verilog/alu/v3/aluOp.vh
@@ -0,0 +1,16 @@
+`ifndef ALU_OP
+`define ALU_OP
+
+`define ADD             4'b0000
+`define SUB             4'b1000
+`define XOR             4'b0100
+`define OR              4'b0110
+`define AND             4'b0111
+`define SLL             4'b0001
+`define SRL             4'b0101
+`define SRA             4'b1101
+`define SLT             4'b0010
+`define SLTU            4'b0011
+`define NONE            4'b1111
+
+`endif
diff --git a/verilog/alu/v3/crab.pcf b/verilog/alu/v3/crab.pcf
new file mode 100644
index 0000000..c0d91c5
--- /dev/null
+++ b/verilog/alu/v3/crab.pcf
@@ -0,0 +1,254 @@
+LOCATE COMP "clk48" SITE "A9";
+IOBUF PORT "clk48" IO_TYPE=LVCMOS33;
+FREQUENCY PORT "clk48" 48.0 MHz;
+
+LOCATE COMP "ddram_a[0]" SITE "C4";
+IOBUF PORT "ddram_a[0]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[0]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[1]" SITE "D2";
+IOBUF PORT "ddram_a[1]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[1]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[2]" SITE "D3";
+IOBUF PORT "ddram_a[2]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[2]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[3]" SITE "A3";
+IOBUF PORT "ddram_a[3]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[3]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[4]" SITE "A4";
+IOBUF PORT "ddram_a[4]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[4]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[5]" SITE "D4";
+IOBUF PORT "ddram_a[5]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[5]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[6]" SITE "C3";
+IOBUF PORT "ddram_a[6]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[6]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[7]" SITE "B2";
+IOBUF PORT "ddram_a[7]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[7]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[8]" SITE "B1";
+IOBUF PORT "ddram_a[8]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[8]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[9]" SITE "D1";
+IOBUF PORT "ddram_a[9]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[9]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[10]" SITE "A7";
+IOBUF PORT "ddram_a[10]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[10]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[11]" SITE "C2";
+IOBUF PORT "ddram_a[11]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[11]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[12]" SITE "B6";
+IOBUF PORT "ddram_a[12]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[12]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[13]" SITE "C1";
+IOBUF PORT "ddram_a[13]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[13]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[14]" SITE "A2";
+IOBUF PORT "ddram_a[14]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[14]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_a[15]" SITE "C7";
+IOBUF PORT "ddram_a[15]" SLEWRATE=FAST;
+IOBUF PORT "ddram_a[15]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_ba[0]" SITE "D6";
+IOBUF PORT "ddram_ba[0]" SLEWRATE=FAST;
+IOBUF PORT "ddram_ba[0]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_ba[1]" SITE "B7";
+IOBUF PORT "ddram_ba[1]" SLEWRATE=FAST;
+IOBUF PORT "ddram_ba[1]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_ba[2]" SITE "A6";
+IOBUF PORT "ddram_ba[2]" SLEWRATE=FAST;
+IOBUF PORT "ddram_ba[2]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_ras_n" SITE "C12";
+IOBUF PORT "ddram_ras_n" SLEWRATE=FAST;
+IOBUF PORT "ddram_ras_n" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_cas_n" SITE "D13";
+IOBUF PORT "ddram_cas_n" SLEWRATE=FAST;
+IOBUF PORT "ddram_cas_n" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_we_n" SITE "B12";
+IOBUF PORT "ddram_we_n" SLEWRATE=FAST;
+IOBUF PORT "ddram_we_n" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_cs_n" SITE "A12";
+IOBUF PORT "ddram_cs_n" SLEWRATE=FAST;
+IOBUF PORT "ddram_cs_n" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_dm[0]" SITE "D16";
+IOBUF PORT "ddram_dm[0]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dm[0]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_dm[1]" SITE "G16";
+IOBUF PORT "ddram_dm[1]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dm[1]" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_dq[0]" SITE "C17";
+IOBUF PORT "ddram_dq[0]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[0]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[0]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[1]" SITE "D15";
+IOBUF PORT "ddram_dq[1]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[1]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[1]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[2]" SITE "B17";
+IOBUF PORT "ddram_dq[2]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[2]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[2]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[3]" SITE "C16";
+IOBUF PORT "ddram_dq[3]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[3]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[3]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[4]" SITE "A15";
+IOBUF PORT "ddram_dq[4]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[4]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[4]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[5]" SITE "B13";
+IOBUF PORT "ddram_dq[5]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[5]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[5]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[6]" SITE "A17";
+IOBUF PORT "ddram_dq[6]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[6]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[6]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[7]" SITE "A13";
+IOBUF PORT "ddram_dq[7]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[7]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[7]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[8]" SITE "F17";
+IOBUF PORT "ddram_dq[8]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[8]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[8]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[9]" SITE "F16";
+IOBUF PORT "ddram_dq[9]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[9]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[9]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[10]" SITE "G15";
+IOBUF PORT "ddram_dq[10]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[10]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[10]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[11]" SITE "F15";
+IOBUF PORT "ddram_dq[11]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[11]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[11]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[12]" SITE "J16";
+IOBUF PORT "ddram_dq[12]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[12]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[12]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[13]" SITE "C18";
+IOBUF PORT "ddram_dq[13]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[13]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[13]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[14]" SITE "H16";
+IOBUF PORT "ddram_dq[14]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[14]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[14]" TERMINATION=OFF;
+LOCATE COMP "ddram_dq[15]" SITE "F18";
+IOBUF PORT "ddram_dq[15]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dq[15]" IO_TYPE=SSTL135_I;
+IOBUF PORT "ddram_dq[15]" TERMINATION=OFF;
+LOCATE COMP "ddram_dqs_p[0]" SITE "B15";
+IOBUF PORT "ddram_dqs_p[0]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dqs_p[0]" IO_TYPE=SSTL135D_I;
+IOBUF PORT "ddram_dqs_p[0]" TERMINATION=OFF;
+IOBUF PORT "ddram_dqs_p[0]" DIFFRESISTOR=100;
+LOCATE COMP "ddram_dqs_p[1]" SITE "G18";
+IOBUF PORT "ddram_dqs_p[1]" SLEWRATE=FAST;
+IOBUF PORT "ddram_dqs_p[1]" IO_TYPE=SSTL135D_I;
+IOBUF PORT "ddram_dqs_p[1]" TERMINATION=OFF;
+IOBUF PORT "ddram_dqs_p[1]" DIFFRESISTOR=100;
+LOCATE COMP "ddram_clk_p" SITE "J18";
+IOBUF PORT "ddram_clk_p" SLEWRATE=FAST;
+IOBUF PORT "ddram_clk_p" IO_TYPE=SSTL135D_I;
+LOCATE COMP "ddram_cke" SITE "D18";
+IOBUF PORT "ddram_cke" SLEWRATE=FAST;
+IOBUF PORT "ddram_cke" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_odt" SITE "C13";
+IOBUF PORT "ddram_odt" SLEWRATE=FAST;
+IOBUF PORT "ddram_odt" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_reset_n" SITE "L18";
+IOBUF PORT "ddram_reset_n" SLEWRATE=FAST;
+IOBUF PORT "ddram_reset_n" IO_TYPE=SSTL135_I;
+LOCATE COMP "ddram_vccio[0]" SITE "K16";
+IOBUF PORT "ddram_vccio[0]" SLEWRATE=FAST;
+IOBUF PORT "ddram_vccio[0]" IO_TYPE=SSTL135_II;
+LOCATE COMP "ddram_vccio[1]" SITE "D17";
+IOBUF PORT "ddram_vccio[1]" SLEWRATE=FAST;
+IOBUF PORT "ddram_vccio[1]" IO_TYPE=SSTL135_II;
+LOCATE COMP "ddram_vccio[2]" SITE "K15";
+IOBUF PORT "ddram_vccio[2]" SLEWRATE=FAST;
+IOBUF PORT "ddram_vccio[2]" IO_TYPE=SSTL135_II;
+LOCATE COMP "ddram_vccio[3]" SITE "K17";
+IOBUF PORT "ddram_vccio[3]" SLEWRATE=FAST;
+IOBUF PORT "ddram_vccio[3]" IO_TYPE=SSTL135_II;
+LOCATE COMP "ddram_vccio[4]" SITE "B18";
+IOBUF PORT "ddram_vccio[4]" SLEWRATE=FAST;
+IOBUF PORT "ddram_vccio[4]" IO_TYPE=SSTL135_II;
+LOCATE COMP "ddram_vccio[5]" SITE "C6";
+IOBUF PORT "ddram_vccio[5]" SLEWRATE=FAST;
+IOBUF PORT "ddram_vccio[5]" IO_TYPE=SSTL135_II;
+LOCATE COMP "ddram_gnd[0]" SITE "L15";
+IOBUF PORT "ddram_gnd[0]" SLEWRATE=FAST;
+IOBUF PORT "ddram_gnd[0]" IO_TYPE=SSTL135_II;
+LOCATE COMP "ddram_gnd[1]" SITE "L16";
+IOBUF PORT "ddram_gnd[1]" SLEWRATE=FAST;
+IOBUF PORT "ddram_gnd[1]" IO_TYPE=SSTL135_II;
+LOCATE COMP "rgb_led0_r" SITE "K4";
+IOBUF PORT "rgb_led0_r" IO_TYPE=LVCMOS33;
+LOCATE COMP "rgb_led0_g" SITE "M3";
+IOBUF PORT "rgb_led0_g" IO_TYPE=LVCMOS33;
+LOCATE COMP "rgb_led0_b" SITE "J3";
+IOBUF PORT "rgb_led0_b" IO_TYPE=LVCMOS33;
+LOCATE COMP "gpio_0" SITE "N17";
+IOBUF PORT "gpio_0" IO_TYPE=LVCMOS33;
+IOBUF PORT "gpio_0" PULLMODE=DOWN;
+LOCATE COMP "gpio_1" SITE "M18";
+IOBUF PORT "gpio_1" IO_TYPE=LVCMOS33;
+IOBUF PORT "gpio_1" PULLMODE=DOWN;
+LOCATE COMP "gpio_5" SITE "B10";
+IOBUF PORT "gpio_5" IO_TYPE=LVCMOS33;
+IOBUF PORT "gpio_5" PULLMODE=DOWN;
+LOCATE COMP "gpio_6" SITE "B9";
+IOBUF PORT "gpio_6" IO_TYPE=LVCMOS33;
+IOBUF PORT "gpio_6" PULLMODE=DOWN;
+LOCATE COMP "gpio_9" SITE "C8";
+IOBUF PORT "gpio_9" IO_TYPE=LVCMOS33;
+IOBUF PORT "gpio_9" PULLMODE=DOWN;
+LOCATE COMP "gpio_10" SITE "B8";
+IOBUF PORT "gpio_10" IO_TYPE=LVCMOS33;
+IOBUF PORT "gpio_10" PULLMODE=DOWN;
+LOCATE COMP "gpio_11" SITE "A8";
+IOBUF PORT "gpio_11" IO_TYPE=LVCMOS33;
+IOBUF PORT "gpio_11" PULLMODE=DOWN;
+LOCATE COMP "gpio_12" SITE "H2";
+IOBUF PORT "gpio_12" IO_TYPE=LVCMOS33;
+IOBUF PORT "gpio_12" PULLMODE=DOWN;
+LOCATE COMP "gpio_13" SITE "J2";
+IOBUF PORT "gpio_13" IO_TYPE=LVCMOS33;
+IOBUF PORT "gpio_13" PULLMODE=DOWN;
+LOCATE COMP "gpio_a0" SITE "L4";
+IOBUF PORT "gpio_a0" IO_TYPE=LVCMOS33;
+IOBUF PORT "gpio_a0" PULLMODE=DOWN;
+LOCATE COMP "gpio_a1" SITE "N3";
+IOBUF PORT "gpio_a1" IO_TYPE=LVCMOS33;
+IOBUF PORT "gpio_a1" PULLMODE=DOWN;
+LOCATE COMP "gpio_a2" SITE "N4";
+IOBUF PORT "gpio_a2" IO_TYPE=LVCMOS33;
+IOBUF PORT "gpio_a2" PULLMODE=DOWN;
+LOCATE COMP "gpio_a3" SITE "H4";
+IOBUF PORT "gpio_a3" IO_TYPE=LVCMOS33;
+IOBUF PORT "gpio_a3" PULLMODE=DOWN;
+LOCATE COMP "usr_btn" SITE "J17";
+IOBUF PORT "usr_btn" IO_TYPE=SSTL135_I;
+LOCATE COMP "rst_n" SITE "V17";
+IOBUF PORT "rst_n" IO_TYPE=LVCMOS33;
+LOCATE COMP "spiflash4x_cs_n" SITE "U17";
+IOBUF PORT "spiflash4x_cs_n" IO_TYPE=LVCMOS33;
+LOCATE COMP "spiflash4x_dq[0]" SITE "U18";
+IOBUF PORT "spiflash4x_dq[0]" IO_TYPE=LVCMOS33;
+LOCATE COMP "spiflash4x_dq[1]" SITE "T18";
+IOBUF PORT "spiflash4x_dq[1]" IO_TYPE=LVCMOS33;
+LOCATE COMP "spiflash4x_dq[2]" SITE "R18";
+IOBUF PORT "spiflash4x_dq[2]" IO_TYPE=LVCMOS33;
+LOCATE COMP "spiflash4x_dq[3]" SITE "N18";
+IOBUF PORT "spiflash4x_dq[3]" IO_TYPE=LVCMOS33;
+LOCATE COMP "usb_d_p" SITE "N1";
+IOBUF PORT "usb_d_p" IO_TYPE=LVCMOS33;
+LOCATE COMP "usb_d_n" SITE "M2";
+IOBUF PORT "usb_d_n" IO_TYPE=LVCMOS33;
+LOCATE COMP "usb_pullup" SITE "N2";
+IOBUF PORT "usb_pullup" IO_TYPE=LVCMOS33;
diff --git a/verilog/alu/v3/tbalu.cpp b/verilog/alu/v3/tbalu.cpp
new file mode 100644
index 0000000..b3947f8
--- /dev/null
+++ b/verilog/alu/v3/tbalu.cpp
@@ -0,0 +1,45 @@
+#include <stdlib.h>
+#include <iostream>
+#include <verilated.h>
+#include <verilated_vcd_c.h>
+#include "Valu.h"
+#include "aluOp.h"
+#define OP SRA
+#define OPSTR "SRA"
+#define SIGN "SRA"
+#define LOWER -10
+#define UPPER 0
+
+vluint64_t sim_time = 0;
+
+int main(int argc, char** argv, char** env) {
+	Valu *dut = new Valu;
+	
+	Verilated::traceEverOn(true);
+	VerilatedVcdC *m_trace = new VerilatedVcdC;
+	dut->trace(m_trace, 5);
+	m_trace->open("waveform.vcd");
+	
+	dut->op = OP;
+	for (dut->in1 = LOWER; (int) dut->in1 < UPPER; dut->in1++) {
+		for (dut->in2 = 0; (int) dut->in2 < 10; dut->in2++) {
+			dut->eval();
+			std::cout << OPSTR << ": " << (int) dut->in1 << " " <<  SIGN << " " << (int) dut->in2 << " = " << (int) dut->out << "\n";
+			sim_time++;
+			m_trace->dump(sim_time);
+		}
+	}
+
+	for (dut->in1 = 1; (int) dut->in1 < 10; dut->in1++) {
+		for (dut->in2 = 0; (int) dut->in2 < 10; dut->in2++) {
+			dut->eval();
+			std::cout << OPSTR << ": " << dut->in1 << " " <<  SIGN << " " << dut->in2 << " = " <<  dut->out << "\n";
+			sim_time++;
+			m_trace->dump(sim_time);
+		}
+	}
+	
+	m_trace->close();
+	delete dut;
+	exit(EXIT_SUCCESS);
+}