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#!/usr/bin/python
from __future__ import division
from __future__ import print_function
import sys
import random
from contextlib import contextmanager
@contextmanager
def redirect_stdout(new_target):
old_target, sys.stdout = sys.stdout, new_target
try:
yield new_target
finally:
sys.stdout = old_target
def maybe_plus_e(expr):
if random.randint(0, 4) == 0:
return "(%s + e)" % expr
else:
return expr
for idx in range(100):
with file('temp/uut_%05d.v' % idx, 'w') as f, redirect_stdout(f):
print('module uut_%05d(a, b, c, d, e, s, y);' % (idx))
ac_signed = random.choice(['', ' signed'])
bd_signed = random.choice(['', ' signed'])
op = random.choice(['+', '-', '*', '/', '%', '<<', '>>', '<<<', '>>>'])
print(' input%s [%d:0] a;' % (ac_signed, random.randint(0, 8)))
print(' input%s [%d:0] b;' % (bd_signed, random.randint(0, 8)))
print(' input%s [%d:0] c;' % (ac_signed, random.randint(0, 8)))
print(' input%s [%d:0] d;' % (bd_signed, random.randint(0, 8)))
print(' input signed [%d:0] e;' % random.randint(0, 8))
print(' input s;')
print(' output [%d:0] y;' % random.randint(0, 8))
print(' assign y = (s ? %s(%s %s %s) : %s(%s %s %s))%s;' %
(random.choice(['', '$signed', '$unsigned']), maybe_plus_e('a'), op, maybe_plus_e('b'),
random.choice(['', '$signed', '$unsigned']), maybe_plus_e('c'), op, maybe_plus_e('d'),
' + e' if random.randint(0, 4) == 0 else ''))
print('endmodule')
with file('temp/uut_%05d.ys' % idx, 'w') as f, redirect_stdout(f):
print('read_verilog temp/uut_%05d.v' % idx)
print('proc;;')
print('copy uut_%05d gold' % idx)
print('rename uut_%05d gate' % idx)
print('share -aggressive gate')
print('miter -equiv -flatten -ignore_gold_x -make_outputs -make_outcmp gold gate miter')
print('sat -set-def-inputs -verify -prove trigger 0 -show-inputs -show-outputs miter')
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