Merge pull request #97 from rlutz/hlc-fixes

Fixes to high-level configuration converters

1 files changed, 44 insertions, 0 deletions

diff --git a/icebox/tc_logic_xpr.py b/icebox/tc_logic_xpr.py
new file mode 100644
index 0000000..10f031c
--- /dev/null
+++ b/icebox/tc_logic_xpr.py
@@ -0,0 +1,44 @@
+# Test case for `icebox_asc2hlc' and `icebox_hlc2asc': Does conversion
+#   from LUT strings to logic expressions and back work correctly?
+# Copyright (C) 2017 Roland Lutz
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import sys
+import icebox
+from icebox_asc2hlc import lut_to_logic_expression
+from icebox_hlc2asc import logic_expression_to_lut
+
+def main():
+    sys.stderr.write("testing conversion from LUT strings "
+                     "to logic expressions and back")
+
+    for i in range(65536):
+        if i % 4096 == 0:
+            sys.stderr.write(".")
+            sys.stderr.flush()
+
+        lut = bin(i)[2:].zfill(16)
+        s = lut_to_logic_expression(lut, ('a', 'b', 'c', 'd'))
+        l = logic_expression_to_lut(s, ('a', 'b', 'c', 'd'))
+
+        if l != lut:
+            sys.stderr.write("\nERROR at LUT  = %s\n" % lut)
+            sys.stderr.write("stringified   = %s\n" % s)
+            sys.stderr.write("resulting LUT = %s\n" % l)
+            sys.exit(1)
+
+    sys.stderr.write("\n")
+
+if __name__ == '__main__':
+    main()