1 //===-- Unittests for Limits ----------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/__support/CPP/limits.h" 10 #include "src/__support/big_int.h" 11 #include "src/__support/macros/config.h" 12 #include "src/__support/macros/properties/types.h" // LIBC_TYPES_HAS_INT128 13 #include "test/UnitTest/Test.h" 14 15 namespace LIBC_NAMESPACE_DECL { 16 17 // This just checks against the C spec, almost all implementations will surpass 18 // this. 19 TEST(LlvmLibcLimitsTest, LimitsFollowSpec) { 20 ASSERT_EQ(cpp::numeric_limits<int>::max(), INT_MAX); 21 ASSERT_EQ(cpp::numeric_limits<int>::min(), INT_MIN); 22 23 ASSERT_EQ(cpp::numeric_limits<unsigned int>::max(), UINT_MAX); 24 25 ASSERT_EQ(cpp::numeric_limits<long>::max(), LONG_MAX); 26 ASSERT_EQ(cpp::numeric_limits<long>::min(), LONG_MIN); 27 28 ASSERT_EQ(cpp::numeric_limits<unsigned long>::max(), ULONG_MAX); 29 30 ASSERT_EQ(cpp::numeric_limits<long long>::max(), LLONG_MAX); 31 ASSERT_EQ(cpp::numeric_limits<long long>::min(), LLONG_MIN); 32 33 ASSERT_EQ(cpp::numeric_limits<unsigned long long>::max(), ULLONG_MAX); 34 } 35 36 TEST(LlvmLibcLimitsTest, UInt128Limits) { 37 auto umax128 = cpp::numeric_limits<LIBC_NAMESPACE::UInt<128>>::max(); 38 auto umax64 = LIBC_NAMESPACE::UInt<128>(cpp::numeric_limits<uint64_t>::max()); 39 EXPECT_GT(umax128, umax64); 40 ASSERT_EQ(~LIBC_NAMESPACE::UInt<128>(0), umax128); 41 #ifdef LIBC_TYPES_HAS_INT128 42 ASSERT_EQ(~__uint128_t(0), cpp::numeric_limits<__uint128_t>::max()); 43 #endif // LIBC_TYPES_HAS_INT128 44 } 45 46 } // namespace LIBC_NAMESPACE_DECL 47