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Merged
mborland merged 1 commit into from
Jul 9, 2026
Merged

Update vendor copy of int128 #235

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4 changes: 0 additions & 4 deletions include/boost/safe_numbers.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -5,8 +5,6 @@
#ifndef BOOST_SAFENUMBERS_HPP
#define BOOST_SAFENUMBERS_HPP

#define BOOST_SAFE_NUMBERS_DETAIL_INT128_ALLOW_SIGN_CONVERSION

#include <boost/safe_numbers/unsigned_integers.hpp>
#include <boost/safe_numbers/signed_integers.hpp>
#include <boost/safe_numbers/bounded_integers.hpp>
Expand All @@ -23,6 +21,4 @@
#include <boost/safe_numbers/cmath.hpp>
#include <boost/safe_numbers/functional.hpp>

#undef BOOST_SAFE_NUMBERS_DETAIL_INT128_ALLOW_SIGN_CONVERSION

#endif //BOOST_SAFENUMBERS_HPP
20 changes: 12 additions & 8 deletions include/boost/safe_numbers/detail/int128/charconv.hpp
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Expand Up @@ -16,6 +16,10 @@
# define BOOST_CHARCONV_ENABLE_CUDA
#endif

#if defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_ENABLE_SYCL) && !defined(BOOST_CHARCONV_ENABLE_SYCL)
# define BOOST_CHARCONV_ENABLE_SYCL
#endif

#include <boost/safe_numbers/detail/int128/int128.hpp>
#include <boost/safe_numbers/detail/int128/literals.hpp>
#include <boost/charconv.hpp>
Expand Down Expand Up @@ -44,23 +48,23 @@ struct make_signed<int128::uint128_t> { using type = int128::int128_t; };
template <>
struct make_signed<int128::int128_t> { using type = int128::int128_t; };

#if defined(__CUDACC__) && defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_ENABLE_CUDA)
#if defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_HAS_GPU_SUPPORT)

template <>
__host__ __device__ constexpr int128::uint128_t get_max_value<int128::uint128_t>()
BOOST_SAFE_NUMBERS_DETAIL_INT128_HOST_DEVICE constexpr int128::uint128_t get_max_value<int128::uint128_t>()
{
return std::numeric_limits<int128::uint128_t>::max();
}

template <>
__host__ __device__ constexpr int128::int128_t get_max_value<int128::int128_t>()
BOOST_SAFE_NUMBERS_DETAIL_INT128_HOST_DEVICE constexpr int128::int128_t get_max_value<int128::int128_t>()
{
return std::numeric_limits<int128::int128_t>::max();
}

#endif // __NVCC__
#endif

#if !(defined(__CUDACC__) && defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_ENABLE_CUDA))
#if !defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_HAS_GPU_SUPPORT)

BOOST_SAFE_NUMBERS_DETAIL_INT128_INLINE_CONSTEXPR int128::uint128_t int128_pow10[39] =
{
Expand Down Expand Up @@ -109,7 +113,7 @@ BOOST_SAFE_NUMBERS_DETAIL_INT128_INLINE_CONSTEXPR int128::uint128_t int128_pow10

BOOST_SAFE_NUMBERS_DETAIL_INT128_HOST_DEVICE constexpr int num_digits(const int128::uint128_t& x) noexcept
{
#if defined(__CUDACC__) && defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_ENABLE_CUDA)
#if defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_HAS_GPU_SUPPORT)

constexpr int128::uint128_t int128_pow10[39] =
{
Expand Down Expand Up @@ -187,7 +191,7 @@ BOOST_SAFE_NUMBERS_DETAIL_INT128_HOST_DEVICE constexpr int num_digits(const int1

BOOST_SAFE_NUMBERS_DETAIL_INT128_HOST_DEVICE BOOST_CHARCONV_CONSTEXPR to_chars_result to_chars(char* first, char* last, const int128::uint128_t value, const int base = 10) noexcept
{
#if !(defined(__CUDACC__) && defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_ENABLE_CUDA))
#if !defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_HAS_GPU_SUPPORT)

if (base == 10)
{
Expand All @@ -201,7 +205,7 @@ BOOST_SAFE_NUMBERS_DETAIL_INT128_HOST_DEVICE BOOST_CHARCONV_CONSTEXPR to_chars_r

BOOST_SAFE_NUMBERS_DETAIL_INT128_HOST_DEVICE BOOST_CHARCONV_CONSTEXPR to_chars_result to_chars(char* first, char* last, const int128::int128_t value, const int base = 10) noexcept
{
#if !(defined(__CUDACC__) && defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_ENABLE_CUDA))
#if !defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_HAS_GPU_SUPPORT)

if (base == 10)
{
Expand Down
27 changes: 14 additions & 13 deletions include/boost/safe_numbers/detail/int128/cstdlib.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -61,15 +61,6 @@ BOOST_SAFE_NUMBERS_DETAIL_INT128_EXPORT BOOST_SAFE_NUMBERS_DETAIL_INT128_HOST_DE
return i128div_t{0, 0};
}

#if defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_HAS_INT128)

const auto builtin_x {static_cast<detail::builtin_i128>(x)};
const auto builtin_y {static_cast<detail::builtin_i128>(y)};
return i128div_t{static_cast<int128_t>(builtin_x / builtin_y),
static_cast<int128_t>(builtin_x % builtin_y)};

#else

const auto abs_lhs {static_cast<uint128_t>(abs(x))};
const auto abs_rhs {static_cast<uint128_t>(abs(y))};

Expand All @@ -78,19 +69,29 @@ BOOST_SAFE_NUMBERS_DETAIL_INT128_EXPORT BOOST_SAFE_NUMBERS_DETAIL_INT128_HOST_DE
return {0, x};
}

const auto unsigned_res {div(abs_lhs, abs_rhs)};

const auto negative_quot {(x.high < 0) != (y.high < 0)};
const auto negative_rem {x.high < 0};

#if defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_HAS_INT128)

if (abs_rhs.high != 0)
{
const auto builtin_x {static_cast<detail::builtin_i128>(x)};
const auto builtin_y {static_cast<detail::builtin_i128>(y)};
return i128div_t{static_cast<int128_t>(builtin_x / builtin_y),
static_cast<int128_t>(builtin_x % builtin_y)};
}

#endif

const auto unsigned_res {div(abs_lhs, abs_rhs)};

i128div_t res {static_cast<int128_t>(unsigned_res.quot), static_cast<int128_t>(unsigned_res.rem)};

res.quot = negative_quot ? -res.quot : res.quot;
res.rem = negative_rem ? -res.rem : res.rem;

return res;

#endif
}

} // namespace int128
Expand Down
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