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tests_basic.py
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tests_basic.py
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#!/usr/bin/env python3
##############################################################################
## ##
## FP_TEST_GENERATOR ##
## ##
## Copyright (C) 2020, Florian Schanda ##
## ##
## This file is part of FP_Test_Generator. ##
## ##
## FP_Test_Generator is free software: you can redistribute it and/or ##
## modify it under the terms of the GNU General Public License as ##
## published by the Free Software Foundation, either version 3 of the ##
## License, or (at your option) any later version. ##
## ##
## FP_Test_Generator is distributed in the hope that it will be useful, ##
## but WITHOUT ANY WARRANTY; without even the implied warranty of ##
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ##
## GNU General Public License for more details. ##
## ##
## You should have received a copy of the GNU General Public License ##
## along with FP_Test_Generator. If not, see ##
## <http://www.gnu.org/licenses/>. ##
## ##
##############################################################################
import os
import multiprocessing
from mpf.floats import MPF, Unspecified, smtlib_eq
import attributes
import smtlib
import validation
import validation_host
import validation_mpfr
from core import Seed, Work_Package, precision_name
from float_vectors import fp_test_points, Float_Vector, Float_Vector_With_RM
class Basic_Test_WP(Work_Package):
def __init__(self, fp_op, eb, sb, vec):
self.fp_op = fp_op
self.eb = eb
self.sb = sb
self.vec = vec
def basic_test_build(wp):
assert isinstance(wp, Basic_Test_WP)
attr = attributes.get_simple(wp.fp_op)
# Setup seed
seed = Seed()
seed.set_key("operation", wp.fp_op)
for i in range(attr.arity):
seed.set_key("input_kind_%u" % (i + 1),
wp.vec.vec[i])
if attr.rounding:
seed.set_key("rounding_mode", wp.vec.rm)
# Get rng based on seed
rng = seed.get_rng()
# Create inputs
inputs = []
for input_id, input_kind in enumerate(wp.vec.vec, 1):
inputs.append(("input_%u" % input_id,
fp_test_points[input_kind](wp.eb, wp.sb, rng)))
# Decide if this test should be sat or unsat
expect_unsat = rng.random_bool()
# Compute result
args = []
if attr.rounding:
args.append(wp.vec.rm)
args += [input_value for _, input_value in inputs]
try:
expected_result = attr.function(*args)
unspecified = False
except Unspecified:
unspecified = True
if wp.fp_op in ("fp.min", "fp.max"):
if rng.random_bool():
expected_result = inputs[0][1]
else:
expected_result = inputs[1][1]
expect_unsat = True
else:
assert False
# Validate, if the answer is not unspecified
validation_ok = True
validators = set(["PyMPF"])
if not unspecified:
if attr.mpfr_function is not None:
try:
mpfr_result = attr.mpfr_function(*args)
if smtlib_eq(mpfr_result, expected_result):
validators.add(validation_mpfr.NAME)
else:
print("Validation failed for %s:" % wp.fp_op)
for arg in args:
print(" ", arg)
print("PyMPF result: %s" % expected_result)
print("MPFR result: %s" % mpfr_result)
validation_ok = False
except validation.Unsupported:
pass
if attr.host_function is not None:
try:
host_result = attr.host_function(*args)
if smtlib_eq(host_result, expected_result):
validators.add(validation_host.NAME)
else:
print("Validation failed for %s:" % wp.fp_op)
for arg in args:
if isinstance(arg, MPF):
print(" ", arg, arg.bv)
else:
print(arg)
print("PyMPF result: %s" % expected_result)
print("Host result: %s" % host_result)
validation_ok = False
except validation.Unsupported:
pass
# Decide on filename
if not validation_ok:
prefix = "controversial"
elif len(validators) > 1:
prefix = "tests_validated"
else:
prefix = "tests"
prefix = os.path.join("fptg_testsuite",
prefix,
precision_name(wp.eb, wp.sb),
wp.fp_op)
if attr.rounding:
filename = "%s_%s.smt2" % (wp.vec.rm,
seed.get_base_filename())
else:
filename = "%s.smt2" % seed.get_base_filename()
# Build testcase
os.makedirs(prefix, exist_ok=True)
with open(os.path.join(prefix, filename), "w") as fd:
# Create smtlib output for this test
smtlib.write_header(fd, seed, validators)
if unspecified:
smtlib.set_status(fd, "sat")
smtlib.comment(fd,
"this result exploits unspecified behaviour")
else:
smtlib.set_status(fd, "unsat" if expect_unsat else "sat")
smtlib.set_logic(fd, "QF_FP")
# Emit inputs
for input_name, input_value in inputs:
smtlib.define_fp_const(fd, input_name, input_value)
# Emit expected result
if attr.returns == "bool":
assert isinstance(expected_result, bool)
smtlib.define_const(fd, "expected_result", "Bool",
str(expected_result).lower())
else:
assert isinstance(expected_result, MPF)
smtlib.define_fp_const(fd, "expected_result", expected_result)
# Emit caluclation
result_sort = (expected_result.smtlib_sort()
if attr.returns == "float"
else "Bool")
args = []
if attr.rounding:
args.append(wp.vec.rm)
args += [input_name for input_name, _ in inputs]
smtlib.define_const(fd, "computed_result", result_sort,
"(%s %s)" % (wp.fp_op, " ".join(args)))
# Emit goal
smtlib.goal_eq(fd, "expected_result", "computed_result",
expect_unsat)
# Finish
smtlib.write_footer(fd)
def create(eb, sb, fp_op, reduced):
print("Generating %s (%s)" % (fp_op,
precision_name(eb, sb)))
attr = attributes.get_simple(fp_op)
generator_class = (Float_Vector_With_RM
if attr.rounding
else Float_Vector)
def build_wp():
for vec in generator_class.generate(eb, sb, attr.arity, reduced):
yield Basic_Test_WP(fp_op, eb, sb, vec)
pool = multiprocessing.Pool()
for _ in pool.imap_unordered(basic_test_build, build_wp(), 5):
pass