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Add macOS long double to fp_traits for double precision #1283

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merged 2 commits into from
Aug 29, 2025
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Add macOS long double to fp_traits for double precision #1283

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83d7b1a
Add macOS long double to fp_traits for double precision
mborland Jun 30, 2025
008a31c
MSVC also uses 64-bit long doubles
mborland Jul 3, 2025
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26 changes: 2 additions & 24 deletions include/boost/math/special_functions/detail/fp_traits.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -270,7 +270,7 @@ template<> struct fp_traits_non_native<double, double_precision>
// long double (64 bits) -------------------------------------------------------

#if defined(BOOST_NO_INT64_T) || defined(BOOST_NO_INCLASS_MEMBER_INITIALIZATION)\
|| defined(BOOST_BORLANDC) || defined(__CODEGEAR__)
|| defined(BOOST_BORLANDC) || defined(__CODEGEAR__) || (defined(__APPLE__) && defined(__aarch64__)) || defined(_MSC_VER)

template<> struct fp_traits_non_native<long double, double_precision>
{
Expand All @@ -297,31 +297,9 @@ template<> struct fp_traits_non_native<long double, double_precision>
static constexpr int offset_ = BOOST_MATH_ENDIAN_BIG_BYTE ? 0 : 4;
};

//..............................................................................

#else

template<> struct fp_traits_non_native<long double, double_precision>
{
typedef ieee_copy_all_bits_tag method;

static const uint64_t sign = static_cast<uint64_t>(0x80000000u) << 32;
static const uint64_t exponent = static_cast<uint64_t>(0x7ff00000) << 32;
static const uint64_t flag = 0;
static const uint64_t significand
= (static_cast<uint64_t>(0x000fffff) << 32) + static_cast<uint64_t>(0xffffffffu);

typedef uint64_t bits;
static void get_bits(long double x, uint64_t& a) { std::memcpy(&a, &x, 8); }
static void set_bits(long double& x, uint64_t a) { std::memcpy(&x, &a, 8); }
};

#endif


// long double (>64 bits), x86 and x64 -----------------------------------------

#if defined(__i386) || defined(__i386__) || defined(_M_IX86) \
#elif defined(__i386) || defined(__i386__) || defined(_M_IX86) \
|| defined(__amd64) || defined(__amd64__) || defined(_M_AMD64) \
|| defined(__x86_64) || defined(__x86_64__) || defined(_M_X64)

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