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[platform] Fix Utils::IsInt on unsigned values.
Also add unsigned value tests for IsUint and MagnitudeIsUint to verify they don't have similar issues. TEST=vm/cc/IsInt, vm/cc/IsUint, vm/cc/MagnitudeIsUint Change-Id: I3c8dcb93b9d019117948bb5c3dac0d1d619931b9 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/333083 Commit-Queue: Tess Strickland <sstrickl@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com>
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@ -300,14 +300,13 @@ class Utils {
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constexpr intptr_t value_size_in_bits = kBitsPerByte * sizeof(T);
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if constexpr (std::is_signed<T>::value) {
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if (N >= value_size_in_bits) return true; // Trivially fits.
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const T limit = static_cast<T>(1) << (N - 1);
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return (-limit <= value) && (value < limit);
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} else {
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if (N > value_size_in_bits) return true; // Trivially fits.
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if (N == value_size_in_bits) {
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return static_cast<typename std::make_signed<T>::type>(value) >= 0;
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}
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const T limit = static_cast<T>(1) << (N - 1);
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return value < limit;
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}
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const T limit = static_cast<T>(1) << (N - 1);
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return (-limit <= value) && (value < limit);
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}
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template <typename T>
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@ -276,54 +276,97 @@ VM_UNIT_TEST_CASE(ReverseBitsWord) {
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VM_UNIT_TEST_CASE(IsInt) {
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EXPECT(Utils::IsInt(8, 16));
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EXPECT(Utils::IsInt(8, 16U));
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EXPECT(Utils::IsInt(8, 127));
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EXPECT(Utils::IsInt(8, 127U));
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EXPECT(Utils::IsInt(8, -128));
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EXPECT(!Utils::IsInt(8, static_cast<unsigned int>(-128)));
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EXPECT(!Utils::IsInt(8, 255));
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EXPECT(!Utils::IsInt(8, 255U));
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EXPECT(Utils::IsInt(16, 16));
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EXPECT(Utils::IsInt(16, 16U));
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EXPECT(!Utils::IsInt(16, 65535));
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EXPECT(!Utils::IsInt(16, 65535U));
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EXPECT(Utils::IsInt(16, 32767));
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EXPECT(Utils::IsInt(16, 32767U));
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EXPECT(Utils::IsInt(16, -32768));
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EXPECT(!Utils::IsInt(16, static_cast<unsigned int>(-32768)));
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EXPECT(Utils::IsInt(32, 16LL));
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EXPECT(Utils::IsInt(32, 16ULL));
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EXPECT(Utils::IsInt(32, 2147483647LL));
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EXPECT(Utils::IsInt(32, 2147483647ULL));
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EXPECT(Utils::IsInt(32, -2147483648LL));
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EXPECT(!Utils::IsInt(32, static_cast<uint64_t>(-2147483648LL)));
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EXPECT(!Utils::IsInt(32, 4294967295LL));
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EXPECT(!Utils::IsInt(32, 4294967295ULL));
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}
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VM_UNIT_TEST_CASE(IsUint) {
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EXPECT(Utils::IsUint(8, 16));
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EXPECT(Utils::IsUint(8, 16U));
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EXPECT(Utils::IsUint(8, 0));
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EXPECT(Utils::IsUint(8, 0U));
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EXPECT(Utils::IsUint(8, 255));
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EXPECT(Utils::IsUint(8, 255U));
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EXPECT(!Utils::IsUint(8, 256));
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EXPECT(!Utils::IsUint(8, 256U));
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EXPECT(Utils::IsUint(16, 16));
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EXPECT(Utils::IsUint(16, 16U));
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EXPECT(Utils::IsUint(16, 0));
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EXPECT(Utils::IsUint(16, 0U));
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EXPECT(Utils::IsUint(16, 65535));
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EXPECT(Utils::IsUint(16, 65535U));
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EXPECT(!Utils::IsUint(16, 65536));
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EXPECT(!Utils::IsUint(16, 65536U));
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EXPECT(Utils::IsUint(32, 16LL));
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EXPECT(Utils::IsUint(32, 16ULL));
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EXPECT(Utils::IsUint(32, 0LL));
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EXPECT(Utils::IsUint(32, 0ULL));
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EXPECT(Utils::IsUint(32, 4294967295LL));
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EXPECT(Utils::IsUint(32, 4294967295ULL));
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EXPECT(!Utils::IsUint(32, 4294967296LL));
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EXPECT(!Utils::IsUint(32, 4294967296ULL));
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}
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VM_UNIT_TEST_CASE(MagnitudeIsUint) {
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EXPECT(Utils::MagnitudeIsUint(8, 16));
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EXPECT(Utils::MagnitudeIsUint(8, 16U));
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EXPECT(Utils::MagnitudeIsUint(8, 0));
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EXPECT(Utils::MagnitudeIsUint(8, 0U));
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EXPECT(Utils::MagnitudeIsUint(8, -128));
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EXPECT(!Utils::MagnitudeIsUint(8, static_cast<unsigned int>(-128)));
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EXPECT(Utils::MagnitudeIsUint(8, 255));
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EXPECT(Utils::MagnitudeIsUint(8, 255U));
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EXPECT(!Utils::MagnitudeIsUint(8, 256));
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EXPECT(!Utils::MagnitudeIsUint(8, 256U));
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EXPECT(Utils::MagnitudeIsUint(12, 4095));
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EXPECT(Utils::MagnitudeIsUint(12, 4095U));
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EXPECT(Utils::MagnitudeIsUint(12, -4095));
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EXPECT(!Utils::MagnitudeIsUint(12, static_cast<unsigned int>(-4095)));
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EXPECT(!Utils::MagnitudeIsUint(12, 4096));
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EXPECT(!Utils::MagnitudeIsUint(12, 4096U));
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EXPECT(!Utils::MagnitudeIsUint(12, -4096));
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EXPECT(!Utils::MagnitudeIsUint(12, static_cast<unsigned int>(-4096)));
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EXPECT(Utils::MagnitudeIsUint(16, 16));
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EXPECT(Utils::MagnitudeIsUint(16, 16U));
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EXPECT(Utils::MagnitudeIsUint(16, 0));
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EXPECT(Utils::MagnitudeIsUint(16, 0U));
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EXPECT(Utils::MagnitudeIsUint(16, 65535));
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EXPECT(Utils::MagnitudeIsUint(16, 65535U));
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EXPECT(Utils::MagnitudeIsUint(16, -32768));
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EXPECT(!Utils::MagnitudeIsUint(16, static_cast<unsigned int>(-32768)));
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EXPECT(!Utils::MagnitudeIsUint(16, 65536));
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EXPECT(!Utils::MagnitudeIsUint(16, 65536U));
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EXPECT(Utils::MagnitudeIsUint(32, 16LL));
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EXPECT(Utils::MagnitudeIsUint(32, 16ULL));
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EXPECT(Utils::MagnitudeIsUint(32, 0LL));
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EXPECT(Utils::MagnitudeIsUint(32, 0ULL));
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EXPECT(Utils::MagnitudeIsUint(32, -2147483648LL));
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EXPECT(!Utils::MagnitudeIsUint(32, static_cast<uint64_t>(-2147483648LL)));
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EXPECT(Utils::MagnitudeIsUint(32, 4294967295LL));
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EXPECT(Utils::MagnitudeIsUint(32, 4294967295ULL));
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EXPECT(!Utils::MagnitudeIsUint(32, 4294967296LL));
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EXPECT(!Utils::MagnitudeIsUint(32, 4294967296ULL));
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}
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VM_UNIT_TEST_CASE(LowBits) {
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