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[flang] Fold double bessel functions on Windows. #130253

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Apr 2, 2025
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[flang] Fold double bessel functions on Windows. #130253

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17 changes: 17 additions & 0 deletions flang/lib/Evaluate/intrinsics-library.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -559,6 +559,23 @@ struct HostRuntimeLibrary<long double, LibraryVersion::LibmExtensions> {
#endif // HAS_FLOAT80 || HAS_LDBL128
#endif //_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600

#ifdef _WIN32
template <> struct HostRuntimeLibrary<double, LibraryVersion::LibmExtensions> {
using F = FuncPointer<double, double>;
using FN = FuncPointer<double, int, double>;
static constexpr HostRuntimeFunction table[]{
FolderFactory<F, F{::_j0}>::Create("bessel_j0"),
FolderFactory<F, F{::_j1}>::Create("bessel_j1"),
FolderFactory<FN, FN{::_jn}>::Create("bessel_jn"),
FolderFactory<F, F{::_y0}>::Create("bessel_y0"),
FolderFactory<F, F{::_y1}>::Create("bessel_y1"),
FolderFactory<FN, FN{::_yn}>::Create("bessel_yn"),
};
static constexpr HostRuntimeMap map{table};
static_assert(map.Verify(), "map must be sorted");
};
#endif

/// Define pgmath description
#if LINK_WITH_LIBPGMATH
// Only use libpgmath for folding if it is available.
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