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#include <cstdint>
#include <vector>
#include "profile/MemProfData.inc"
#include "gtest/gtest.h"
namespace llvm {
namespace memprof {
namespace {
TEST(MemProf, F16EncodeDecode) {
const std::vector<uint64_t> TestCases = {
0, 100, 4095, 4096, 5000, 8191, 65535, 1000000, 134213640, 200000000,
};
for (const uint64_t TestCase : TestCases) {
const uint16_t Encoded = encodeHistogramCount(TestCase);
const uint64_t Decoded = decodeHistogramCount(Encoded);
const uint64_t MaxRepresentable = static_cast<uint64_t>(MaxMantissa)
<< MaxExponent;
if (TestCase >= MaxRepresentable) {
EXPECT_EQ(Decoded, MaxRepresentable);
} else if (TestCase <= MaxMantissa) {
EXPECT_EQ(Decoded, TestCase);
} else {
// The decoded value should be close to the original value.
// The error should be less than 1/1024 for larger numbers.
EXPECT_NEAR(Decoded, TestCase, static_cast<double>(TestCase) / 1024.0);
}
}
}
} // namespace
} // namespace memprof
} // namespace llvm
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