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https://github.com/YosysHQ/yosys
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a1de898fcc
This is per fmt's (effective) use, as it turns out, so we're not losing any fidelity in the comparison.
45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
#include "fuzztest/fuzztest.h"
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#include "gtest/gtest.h"
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#include <sstream>
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#include "backends/cxxrtl/cxxrtl.h"
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#include "libs/bigint/BigUnsigned.hh"
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using namespace cxxrtl_yosys;
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void Formats128BitIntegers(chunk_t x0, chunk_t x1, chunk_t x2, chunk_t x3, bool signed_)
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{
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// Compare output to BigUnsigned.
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value<128> v;
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v = v.blit<127, 64>(value<64>{x1, x0});
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v = v.blit<63, 0>(value<64>{x3, x2});
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std::ostringstream oss;
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oss << value_formatted<128>(v, false, false, ' ', 0, 10, signed_, false, false);
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auto actual = oss.str();
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BigUnsigned u;
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bool negative = signed_ && v.is_neg();
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if (negative)
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v = v.neg();
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u.bitShiftLeft(v.slice<127, 64>().val().get<uint64_t>(), 64);
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u.bitOr(u, v.slice<63, 0>().val().get<uint64_t>());
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std::string expected;
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if (u.isZero()) {
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expected = "0";
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} else {
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while (!u.isZero()) {
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expected += '0' + (u % 10).toInt();
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u /= 10;
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}
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if (negative)
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expected += '-';
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std::reverse(expected.begin(), expected.end());
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}
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EXPECT_EQ(actual, expected);
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}
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FUZZ_TEST(CxxrtlDivisionFuzz, Formats128BitIntegers);
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