add generated number tests

README.md

@@ -38,6 +38,7 @@ All of sv2v's dependencies are free and open-source.
 * Test Dependencies
     * [Icarus Verilog](http://iverilog.icarus.com) - for Verilog simulation
     * [shUnit2](https://github.com/kward/shunit2) - test framework
+    * Python (any version) - for generating certain test cases
 
 
 ## Installation

test/number/.gitignore

@@ -0,0 +1 @@
+*.sv

test/number/gen.py

@@ -0,0 +1,50 @@
+import math
+import sys
+
+
+def gen_digits(digits, size):
+    if size <= 0:
+        raise Exception("size must be positive")
+    elif size == 1:
+        for digit in digits:
+            yield digit
+    else:
+        for base in gen_digits(digits, size - 1):
+            for digit in digits:
+                yield base + digit
+
+
+def gen(max_length, code, base, digits):
+    for length in range(1, max_length + 1):
+        min_bits = math.floor(1 + (length - 1) * math.log(base, 2))
+        max_bits = math.ceil(length * math.log(base, 2))
+        for number in gen_digits(digits, length):
+            yield "'" + code + number
+            yield "'s" + code + number
+
+            number_bin = number.replace("x", "0").replace("z", "0")
+            min_value = max(1, int(number_bin, base)) + 1
+            curr_min_bits = max(min_bits, math.ceil(math.log(min_value, 2)))
+
+            for bits in range(int(curr_min_bits), int(max_bits + 1)):
+                size = str(bits)
+                yield size + "'" + code + number
+                yield size + "'s" + code + number
+
+
+if __name__ == "__main__":
+    assert len(sys.argv) == 5
+    max_length = int(sys.argv[1])
+    code = sys.argv[2]
+    base = int(sys.argv[3])
+    digits = sys.argv[4]
+
+    print('`define T(n) $display(`"n => %b => %0d`", n, $bits(n));')
+    print("module top;")
+    print("initial begin")
+
+    for number in gen(max_length, code, base, digits):
+        print("`T({})".format(number))
+
+    print("end")
+    print("endmodule")

test/number/run.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+python gen.py 4 b 2 01xz > binary.sv
+python gen.py 2 o 8 01234567xz > octal.sv
+python gen.py 2 d 10 0123456789 > decimal.sv
+python gen.py 2 h 16 0123456789abcdefxz > hex.sv
+source ../lib/runner.sh