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More yosys-smtbmc smtc features

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This commit is contained in:
Clifford Wolf 2016-08-24 23:18:29 +02:00
parent ee3e7a0e45
commit ad56ad44c3
5 changed files with 97 additions and 20 deletions
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74
backends/smt2/smtbmc.py
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@ -20,6 +20,7 @@
import os, sys, getopt, re
##yosys-sys-path##
from smtio import smtio, smtopts, mkvcd
from collections import defaultdict
skip_steps = 0
step_size = 1
@ -120,43 +121,70 @@ if tempind and len(inconstr) != 0:
sys.exit(1)
constr_asserts = dict()
constr_assumes = dict()
constr_asserts = defaultdict(list)
constr_assumes = defaultdict(list)
for fn in inconstr:
current_state = None
current_states = None
with open(fn, "r") as f:
for line in f:
if line.startswith("#"):
continue
tokens = line.split()
if len(tokens) == 0:
continue
if tokens[0] == "initial":
current_state = 0
current_states = set()
current_states.add(0)
continue
if tokens[0] == "state":
current_state = int(tokens[1])
current_states = set()
for token in tokens[1:]:
tok = token.split(":")
if len(tok) == 1:
current_states.add(int(token))
elif len(tok) == 2:
lower = int(tok[0])
if tok[1] == "*":
upper = num_steps
else:
upper = int(tok[1])
for i in range(lower, upper+1):
current_states.add(i)
else:
assert 0
continue
if tokens[0] == "always":
if len(tokens) == 1:
current_states = set(range(0, num_steps+1))
elif len(tokens) == 2:
i = int(tokens[1])
assert i < 0
current_states = set(range(-i, num_steps+1))
else:
assert 0
continue
if tokens[0] == "assert":
assert current_state is not None
assert current_states is not None
if current_state not in constr_asserts:
constr_asserts[current_state] = list()
for state in current_states:
constr_asserts[state].append(" ".join(tokens[1:]))
constr_asserts[current_state].append(" ".join(tokens[1:]))
continue
if tokens[0] == "assume":
assert current_state is not None
assert current_states is not None
if current_state not in constr_assumes:
constr_assumes[current_state] = list()
for state in current_states:
constr_assumes[state].append(" ".join(tokens[1:]))
constr_assumes[current_state].append(" ".join(tokens[1:]))
continue
assert 0
@ -166,9 +194,25 @@ def get_constr_expr(db, state):
if state not in db:
return "true"
netref_regex = re.compile(r'(^|[( ])\[(-?[0-9]+:|)([^\]]+)\](?=[ )]|$)')
def replace_netref(match):
state_sel = match.group(2)
if state_sel == "":
st = state
elif state_sel[0] == "-":
st = state + int(state_sel[:-1])
else:
st = int(state_sel[:-1])
expr = smt.net_expr(topmod, "s%d" % st, smt.get_path(topmod, match.group(3)))
return match.group(1) + expr
expr_list = list()
for expr in db[state]:
expr = re.sub(r'\[([^\]]+)\]', lambda match: smt.net_expr(topmod, "s%d" % state, smt.get_path(topmod, match.group(1))), expr)
expr = netref_regex.sub(replace_netref, expr)
expr_list.append(expr)
if len(expr_list) == 0:
@ -430,7 +474,7 @@ if tempind:
break
else: # not tempind, not gentrace
else: # not tempind
step = 0
retstatus = True
while step < num_steps: