clang/test/Sema/constant-builtins-fmax.cpp

   1 // RUN: %clang_cc1 -std=c++17 -fsyntax-only -verify %s
   2 // expected-no-diagnostics
   3
   4 constexpr double NaN = __builtin_nan("");
   5 constexpr double Inf = __builtin_inf();
   6 constexpr double NegInf = -__builtin_inf();
   7
   8 #define FMAX_TEST_SIMPLE(T, FUNC)                           \
   9     static_assert(T(6.7890) == FUNC(T(1.2345), T(6.7890))); \
  10     static_assert(T(6.7890) == FUNC(T(6.7890), T(1.2345)));
  11
  12 #define FMAX_TEST_NAN(T, FUNC)                          \
  13     static_assert(Inf == FUNC(NaN, Inf));               \
  14     static_assert(NegInf == FUNC(NegInf, NaN));         \
  15     static_assert(0.0 == FUNC(NaN, 0.0));               \
  16     static_assert(-0.0 == FUNC(-0.0, NaN));             \
  17     static_assert(T(-1.2345) == FUNC(NaN, T(-1.2345))); \
  18     static_assert(T(1.2345) == FUNC(T(1.2345), NaN));   \
  19     static_assert(__builtin_isnan(FUNC(NaN, NaN)));
  20
  21 #define FMAX_TEST_INF(T, FUNC)                  \
  22     static_assert(Inf == FUNC(NegInf, Inf));    \
  23     static_assert(Inf == FUNC(Inf, 0.0));       \
  24     static_assert(Inf == FUNC(-0.0, Inf));      \
  25     static_assert(Inf == FUNC(Inf, T(1.2345))); \
  26     static_assert(Inf == FUNC(T(-1.2345), Inf));
  27
  28 #define FMAX_TEST_NEG_INF(T, FUNC)                         \
  29     static_assert(Inf == FUNC(Inf, NegInf));               \
  30     static_assert(0.0 == FUNC(NegInf, 0.0));               \
  31     static_assert(-0.0 == FUNC(-0.0, NegInf));             \
  32     static_assert(T(-1.2345) == FUNC(NegInf, T(-1.2345))); \
  33     static_assert(T(1.2345) == FUNC(T(1.2345), NegInf));
  34
  35 #define FMAX_TEST_BOTH_ZERO(T, FUNC)       \
  36     static_assert(__builtin_copysign(1.0, FUNC(0.0, 0.0)) == 1.0);  \
  37     static_assert(__builtin_copysign(1.0, FUNC(-0.0, 0.0)) == 1.0);  \
  38     static_assert(__builtin_copysign(1.0, FUNC(0.0, -0.0)) == 1.0);  \
  39     static_assert(__builtin_copysign(1.0, FUNC(-0.0, -0.0)) == -1.0);
  40
  41 #define LIST_FMAX_TESTS(T, FUNC) \
  42     FMAX_TEST_SIMPLE(T, FUNC)    \
  43     FMAX_TEST_NAN(T, FUNC)       \
  44     FMAX_TEST_INF(T, FUNC)       \
  45     FMAX_TEST_NEG_INF(T, FUNC)   \
  46     FMAX_TEST_BOTH_ZERO(T, FUNC)
  47
  48 LIST_FMAX_TESTS(double, __builtin_fmax)
  49 LIST_FMAX_TESTS(float, __builtin_fmaxf)
  50 LIST_FMAX_TESTS((long double), __builtin_fmaxl)
  51 LIST_FMAX_TESTS(__fp16, __builtin_fmaxf16)
  52 #ifdef __FLOAT128__
  53 LIST_FMAX_TESTS(__float128, __builtin_fmaxf128)
  54 #endif