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[yul-phaser] Add --relative-metric-scale option

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This commit is contained in:
Kamil Śliwak 2020-02-25 19:33:54 +01:00
parent 8e64c5c6f0
commit 01050940fd
3 changed files with 28 additions and 1 deletions
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13
test/yulPhaser/Phaser.cpp
View File

@ -62,6 +62,7 @@ protected:
Program m_program = get<Program>(Program::load(m_sourceStream));
FitnessMetricFactory::Options m_options = {
/* metric = */ MetricChoice::CodeSize,
/* relativeMetricScale = */ 5,
/* chromosomeRepetitions = */ 1,
};
};
@ -163,6 +164,18 @@ BOOST_FIXTURE_TEST_CASE(build_should_respect_chromosome_repetitions_option, Fitn
BOOST_TEST(programSizeMetric->repetitionCount() == m_options.chromosomeRepetitions);
}
BOOST_FIXTURE_TEST_CASE(build_should_set_relative_metric_scale, FitnessMetricFactoryFixture)
{
m_options.metric = MetricChoice::RelativeCodeSize;
m_options.relativeMetricScale = 10;
unique_ptr<FitnessMetric> metric = FitnessMetricFactory::build(m_options, m_program);
BOOST_REQUIRE(metric != nullptr);
auto relativeProgramSizeMetric = dynamic_cast<RelativeProgramSize*>(metric.get());
BOOST_REQUIRE(relativeProgramSizeMetric != nullptr);
BOOST_TEST(relativeProgramSizeMetric->fixedPointPrecision() == m_options.relativeMetricScale);
}
BOOST_AUTO_TEST_SUITE_END()
BOOST_AUTO_TEST_SUITE(PopulationFactoryTest)

15
tools/yulPhaser/Phaser.cpp
View File

@ -139,6 +139,7 @@ FitnessMetricFactory::Options FitnessMetricFactory::Options::fromCommandLine(po:
{
return {
_arguments["metric"].as<MetricChoice>(),
_arguments["relative-metric-scale"].as<size_t>(),
_arguments["chromosome-repetitions"].as<size_t>(),
};
}
@ -158,7 +159,7 @@ unique_ptr<FitnessMetric> FitnessMetricFactory::build(
case MetricChoice::RelativeCodeSize:
return make_unique<RelativeProgramSize>(
move(_program),
3,
_options.relativeMetricScale,
_options.chromosomeRepetitions
);
default:
@ -421,6 +422,18 @@ Phaser::CommandLineDescription Phaser::buildCommandLineDescription()
po::value<MetricChoice>()->value_name("<NAME>")->default_value(MetricChoice::CodeSize),
"Metric used to evaluate the fitness of a chromosome."
)
(
"relative-metric-scale",
po::value<size_t>()->value_name("<EXPONENT>")->default_value(3),
"Scaling factor for values produced by relative fitness metrics. \n"
"Since all metrics must produce integer values, the fractional part of the result is discarded. "
"To keep the numbers meaningful, a relative metric multiples its values by a scaling factor "
"and this option specifies the exponent of this factor. "
"For example with value of 3 the factor is 10^3 = 1000 and the metric will return "
"500 to represent 0.5, 1000 for 1.0, 2000 for 2.0 and so on. "
"Using a bigger factor allows discerning smaller relative differences between chromosomes "
"but makes the numbers less readable and may also lose precision if the numbers are very large."
)
(
"chromosome-repetitions",
po::value<size_t>()->value_name("<COUNT>")->default_value(1),

1
tools/yulPhaser/Phaser.h
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@ -100,6 +100,7 @@ public:
struct Options
{
MetricChoice metric;
size_t relativeMetricScale;
size_t chromosomeRepetitions;
static Options fromCommandLine(boost::program_options::variables_map const& _arguments);