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[Clang] Support constexpr builtin fmax
Support constexpr version of __builtin_fmax and its variations. Reviewed By: jcranmer-intel Differential Revision: https://reviews.llvm.org/D134369
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// RUN: %clang_cc1 -fsyntax-only -verify %s | ||
// expected-no-diagnostics | ||
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constexpr double NaN = __builtin_nan(""); | ||
constexpr double Inf = __builtin_inf(); | ||
constexpr double NegInf = -__builtin_inf(); | ||
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#define FMAX_TEST_SIMPLE(T, FUNC) \ | ||
static_assert(T(6.7890) == FUNC(T(1.2345), T(6.7890))); \ | ||
static_assert(T(6.7890) == FUNC(T(6.7890), T(1.2345))); | ||
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#define FMAX_TEST_NAN(T, FUNC) \ | ||
static_assert(Inf == FUNC(NaN, Inf)); \ | ||
static_assert(NegInf == FUNC(NegInf, NaN)); \ | ||
static_assert(0.0 == FUNC(NaN, 0.0)); \ | ||
static_assert(-0.0 == FUNC(-0.0, NaN)); \ | ||
static_assert(T(-1.2345) == FUNC(NaN, T(-1.2345))); \ | ||
static_assert(T(1.2345) == FUNC(T(1.2345), NaN)); \ | ||
static_assert(__builtin_isnan(FUNC(NaN, NaN))); | ||
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#define FMAX_TEST_INF(T, FUNC) \ | ||
static_assert(Inf == FUNC(NegInf, Inf)); \ | ||
static_assert(Inf == FUNC(Inf, 0.0)); \ | ||
static_assert(Inf == FUNC(-0.0, Inf)); \ | ||
static_assert(Inf == FUNC(Inf, T(1.2345))); \ | ||
static_assert(Inf == FUNC(T(-1.2345), Inf)); | ||
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#define FMAX_TEST_NEG_INF(T, FUNC) \ | ||
static_assert(Inf == FUNC(Inf, NegInf)); \ | ||
static_assert(0.0 == FUNC(NegInf, 0.0)); \ | ||
static_assert(-0.0 == FUNC(-0.0, NegInf)); \ | ||
static_assert(T(-1.2345) == FUNC(NegInf, T(-1.2345))); \ | ||
static_assert(T(1.2345) == FUNC(T(1.2345), NegInf)); | ||
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#define FMAX_TEST_BOTH_ZERO(T, FUNC) \ | ||
static_assert(__builtin_copysign(1.0, FUNC(0.0, 0.0)) == 1.0); \ | ||
static_assert(__builtin_copysign(1.0, FUNC(-0.0, 0.0)) == 1.0); \ | ||
static_assert(__builtin_copysign(1.0, FUNC(0.0, -0.0)) == 1.0); \ | ||
static_assert(__builtin_copysign(1.0, FUNC(-0.0, -0.0)) == -1.0); | ||
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#define LIST_FMAX_TESTS(T, FUNC) \ | ||
FMAX_TEST_SIMPLE(T, FUNC) \ | ||
FMAX_TEST_NAN(T, FUNC) \ | ||
FMAX_TEST_INF(T, FUNC) \ | ||
FMAX_TEST_NEG_INF(T, FUNC) \ | ||
FMAX_TEST_BOTH_ZERO(T, FUNC) | ||
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LIST_FMAX_TESTS(double, __builtin_fmax) | ||
LIST_FMAX_TESTS(float, __builtin_fmaxf) | ||
LIST_FMAX_TESTS((long double), __builtin_fmaxl) | ||
LIST_FMAX_TESTS(__fp16, __builtin_fmaxf16) | ||
#ifdef __FLOAT128__ | ||
LIST_FMAX_TESTS(__float128, __builtin_fmaxf128) | ||
#endif |