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Yosys-smtbmc: Support for hierarchical VCD dumping

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This commit is contained in:
Clifford Wolf 2016-07-11 12:49:33 +02:00
parent 0153ad85d9
commit c71785d65e
2 changed files with 59 additions and 23 deletions
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13
backends/smt2/smtbmc.py
View file

@ -98,7 +98,7 @@ smt.setup("QF_AUFBV")
with open(args[0], "r") as f: with open(args[0], "r") as f:
for line in f: for line in f:
smt.write(line) smt.write(line)
smt.getinfo(line) smt.info(line)
if topmod is None: if topmod is None:
topmod = smt.topmod topmod = smt.topmod
@ -106,18 +106,19 @@ if topmod is None:
assert topmod is not None assert topmod is not None
assert topmod in smt.modinfo assert topmod in smt.modinfo
def write_vcd_model(steps): def write_vcd_model(steps):
print("%s Writing model to VCD file." % smt.timestamp()) print("%s Writing model to VCD file." % smt.timestamp())
vcd = mkvcd(open(vcdfile, "w")) vcd = mkvcd(open(vcdfile, "w"))
for netname in sorted(smt.modinfo[topmod].wsize.keys()): for netpath in sorted(smt.hiernets(topmod)):
width = len(smt.get_net_bin(topmod, netname, "s0")) width = len(smt.get_net_bin(topmod, netpath, "s0"))
vcd.add_net(netname, width) vcd.add_net([topmod] + netpath, width)
for i in range(steps): for i in range(steps):
vcd.set_time(i) vcd.set_time(i)
for netname in smt.modinfo[topmod].wsize.keys(): for netpath in sorted(smt.hiernets(topmod)):
vcd.set_net(netname, smt.get_net_bin(topmod, netname, "s%d" % i)) vcd.set_net([topmod] + netpath, smt.get_net_bin(topmod, netpath, "s%d" % i))
vcd.set_time(steps) vcd.set_time(steps)

69
backends/smt2/smtio.py
View file

@ -97,7 +97,7 @@ class smtio:
self.p.stdin.write(bytes(stmt + "\n", "ascii")) self.p.stdin.write(bytes(stmt + "\n", "ascii"))
self.p.stdin.flush() self.p.stdin.flush()
def getinfo(self, stmt): def info(self, stmt):
if not stmt.startswith("; yosys-smt2-"): if not stmt.startswith("; yosys-smt2-"):
return return
@ -129,6 +129,17 @@ class smtio:
self.modinfo[self.curmod].wires.add(fields[2]) self.modinfo[self.curmod].wires.add(fields[2])
self.modinfo[self.curmod].wsize[fields[2]] = int(fields[3]) self.modinfo[self.curmod].wsize[fields[2]] = int(fields[3])
def hiernets(self, top):
def hiernets_worker(nets, mod, cursor):
for netname in sorted(self.modinfo[mod].wsize.keys()):
nets.append(cursor + [netname])
for cellname, celltype in sorted(self.modinfo[mod].cells.items()):
hiernets_worker(nets, celltype, cursor + [cellname])
nets = list()
hiernets_worker(nets, top, [])
return nets
def read(self): def read(self):
stmt = [] stmt = []
count_brackets = 0 count_brackets = 0
@ -282,19 +293,32 @@ class smtio:
self.write("(get-value (%s))" % (expr)) self.write("(get-value (%s))" % (expr))
return self.parse(self.read())[0][1] return self.parse(self.read())[0][1]
def get_net(self, mod_name, net_name, state_name): def get_net(self, mod_name, net_path, state_name):
return self.get("(|%s_n %s| %s)" % (mod_name, net_name, state_name)) def mkexpr(mod, base, path):
if len(path) == 1:
assert mod in self.modinfo
assert path[0] in self.modinfo[mod].wsize
return "(|%s_n %s| %s)" % (mod, path[0], base)
def get_net_bool(self, mod_name, net_name, state_name): assert mod in self.modinfo
v = self.get_net(mod_name, net_name, state_name) assert path[0] in self.modinfo[mod].cells
nextmod = self.modinfo[mod].cells[path[0]]
nextbase = "(|%s_h %s| %s)" % (mod, path[0], base)
return mkexpr(nextmod, nextbase, path[1:])
return self.get(mkexpr(mod_name, state_name, net_path))
def get_net_bool(self, mod_name, net_path, state_name):
v = self.get_net(mod_name, net_path, state_name)
assert v in ["true", "false"] assert v in ["true", "false"]
return 1 if v == "true" else 0 return 1 if v == "true" else 0
def get_net_hex(self, mod_name, net_name, state_name): def get_net_hex(self, mod_name, net_path, state_name):
return self.bv2hex(self.get_net(mod_name, net_name, state_name)) return self.bv2hex(self.get_net(mod_name, net_path, state_name))
def get_net_bin(self, mod_name, net_name, state_name): def get_net_bin(self, mod_name, net_path, state_name):
return self.bv2bin(self.get_net(mod_name, net_name, state_name)) return self.bv2bin(self.get_net(mod_name, net_path, state_name))
def wait(self): def wait(self):
self.p.wait() self.p.wait()
@ -344,24 +368,35 @@ class mkvcd:
self.t = -1 self.t = -1
self.nets = dict() self.nets = dict()
def add_net(self, name, width): def add_net(self, path, width):
path = tuple(path)
assert self.t == -1 assert self.t == -1
key = "n%d" % len(self.nets) key = "n%d" % len(self.nets)
self.nets[name] = (key, width) self.nets[path] = (key, width)
def set_net(self, name, bits): def set_net(self, path, bits):
assert name in self.nets path = tuple(path)
assert self.t >= 0 assert self.t >= 0
print("b%s %s" % (bits, self.nets[name][0]), file=self.f) assert path in self.nets
print("b%s %s" % (bits, self.nets[path][0]), file=self.f)
def set_time(self, t): def set_time(self, t):
assert t >= self.t assert t >= self.t
if t != self.t: if t != self.t:
if self.t == -1: if self.t == -1:
print("$var event 1 ! smt_clock $end", file=self.f) print("$var event 1 ! smt_clock $end", file=self.f)
for name in sorted(self.nets): scope = []
key, width = self.nets[name] for path in sorted(self.nets):
print("$var wire %d %s %s $end" % (width, key, name), file=self.f) while len(scope)+1 > len(path) or (len(scope) > 0 and scope[-1] != path[len(scope)-1]):
print("$upscope $end", file=self.f)
scope = scope[:-1]
while len(scope)+1 < len(path):
print("$scope module %s $end" % path[len(scope)], file=self.f)
scope.append(path[len(scope)-1])
key, width = self.nets[path]
print("$var wire %d %s %s $end" % (width, key, path[-1]), file=self.f)
for i in range(len(scope)):
print("$upscope $end", file=self.f)
print("$enddefinitions $end", file=self.f) print("$enddefinitions $end", file=self.f)
self.t = t self.t = t
assert self.t >= 0 assert self.t >= 0