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| ///////////////////////////////////////////////////////////////
| // Copyright 2012 John Maddock. Distributed under the Boost
| // Software License, Version 1.0. (See accompanying file
| // LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
| //
| // Comparison operators for cpp_int_backend:
| //
| #ifndef BOOST_MP_CPP_INT_ADD_HPP
| #define BOOST_MP_CPP_INT_ADD_HPP
|
| #include <boost/multiprecision/detail/constexpr.hpp>
| #include <boost/multiprecision/cpp_int/add_unsigned.hpp>
|
| namespace boost { namespace multiprecision { namespace backends {
|
| #ifdef _MSC_VER
| #pragma warning(push)
| #pragma warning(disable : 4127) // conditional expression is constant
| #endif
|
| //
| // As above, but for adding a single limb to a non-trivial cpp_int:
| //
| template <class CppInt1, class CppInt2>
| inline BOOST_MP_CXX14_CONSTEXPR void add_unsigned(CppInt1& result, const CppInt2& a, const limb_type& o) BOOST_MP_NOEXCEPT_IF(is_non_throwing_cpp_int<CppInt1>::value)
| {
| // Addition using modular arithmetic.
| // Nothing fancy, just let uintmax_t take the strain:
| if (&result != &a)
| result.resize(a.size(), a.size());
| double_limb_type carry = o;
| typename CppInt1::limb_pointer pr = result.limbs();
| typename CppInt2::const_limb_pointer pa = a.limbs();
| unsigned i = 0;
| // Addition with carry until we either run out of digits or carry is zero:
| for (; carry && (i < result.size()); ++i)
| {
| carry += static_cast<double_limb_type>(pa[i]);
| #ifdef __MSVC_RUNTIME_CHECKS
| pr[i] = static_cast<limb_type>(carry & ~static_cast<limb_type>(0));
| #else
| pr[i] = static_cast<limb_type>(carry);
| #endif
| carry >>= CppInt1::limb_bits;
| }
| // Just copy any remaining digits:
| if (&a != &result)
| {
| std_constexpr::copy(pa + i, pa + a.size(), pr + i);
| }
| if (carry)
| {
| // We overflowed, need to add one more limb:
| unsigned x = result.size();
| result.resize(x + 1, x + 1);
| if (result.size() > x)
| result.limbs()[x] = static_cast<limb_type>(carry);
| }
| result.normalize();
| result.sign(a.sign());
| }
| //
| // And again to subtract a single limb:
| //
| template <class CppInt1, class CppInt2>
| inline BOOST_MP_CXX14_CONSTEXPR void subtract_unsigned(CppInt1& result, const CppInt2& a, const limb_type& b) BOOST_MP_NOEXCEPT_IF(is_non_throwing_cpp_int<CppInt1>::value)
| {
| // Subtract one limb.
| // Nothing fancy, just let uintmax_t take the strain:
| #ifdef BOOST_NO_CXX14_CONSTEXPR
| BOOST_STATIC_CONSTANT(double_limb_type, borrow = static_cast<double_limb_type>(CppInt1::max_limb_value) + 1);
| #else
| constexpr double_limb_type borrow = static_cast<double_limb_type>(CppInt1::max_limb_value) + 1;
| #endif
| result.resize(a.size(), a.size());
| typename CppInt1::limb_pointer pr = result.limbs();
| typename CppInt2::const_limb_pointer pa = a.limbs();
| if (*pa >= b)
| {
| *pr = *pa - b;
| if (&result != &a)
| {
| std_constexpr::copy(pa + 1, pa + a.size(), pr + 1);
| result.sign(a.sign());
| }
| else if ((result.size() == 1) && (*pr == 0))
| {
| result.sign(false); // zero is unsigned.
| }
| }
| else if (result.size() == 1)
| {
| *pr = b - *pa;
| result.sign(!a.sign());
| }
| else
| {
| *pr = static_cast<limb_type>((borrow + *pa) - b);
| unsigned i = 1;
| while (!pa[i])
| {
| pr[i] = CppInt1::max_limb_value;
| ++i;
| }
| pr[i] = pa[i] - 1;
| if (&result != &a)
| {
| ++i;
| std_constexpr::copy(pa + i, pa + a.size(), pr + i);
| }
| result.normalize();
| result.sign(a.sign());
| }
| }
|
| //
| // Now the actual functions called by the front end, all of which forward to one of the above:
| //
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1, unsigned MinBits2, unsigned MaxBits2, cpp_integer_type SignType2, cpp_int_check_type Checked2, class Allocator2>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<!is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && !is_trivial_cpp_int<cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2> >::value>::type
| eval_add(
| cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2>& o) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| eval_add(result, result, o);
| }
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1, unsigned MinBits2, unsigned MaxBits2, cpp_integer_type SignType2, cpp_int_check_type Checked2, class Allocator2, unsigned MinBits3, unsigned MaxBits3, cpp_integer_type SignType3, cpp_int_check_type Checked3, class Allocator3>
| inline BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<!is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && !is_trivial_cpp_int<cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2> >::value && !is_trivial_cpp_int<cpp_int_backend<MinBits3, MaxBits3, SignType3, Checked3, Allocator3> >::value>::type
| eval_add(
| cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2>& a,
| const cpp_int_backend<MinBits3, MaxBits3, SignType3, Checked3, Allocator3>& b) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| if (a.sign() != b.sign())
| {
| subtract_unsigned(result, a, b);
| return;
| }
| add_unsigned(result, a, b);
| }
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<!is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value>::type
| eval_add(cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result, const limb_type& o) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| if (result.sign())
| {
| subtract_unsigned(result, result, o);
| }
| else
| add_unsigned(result, result, o);
| }
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1, unsigned MinBits2, unsigned MaxBits2, cpp_integer_type SignType2, cpp_int_check_type Checked2, class Allocator2>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<!is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && !is_trivial_cpp_int<cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2> >::value>::type
| eval_add(
| cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2>& a,
| const limb_type& o) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| if (a.sign())
| {
| subtract_unsigned(result, a, o);
| }
| else
| add_unsigned(result, a, o);
| }
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<!is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value>::type
| eval_add(
| cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const signed_limb_type& o) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| if (o < 0)
| eval_subtract(result, static_cast<limb_type>(boost::multiprecision::detail::unsigned_abs(o)));
| else if (o > 0)
| eval_add(result, static_cast<limb_type>(o));
| }
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1, unsigned MinBits2, unsigned MaxBits2, cpp_integer_type SignType2, cpp_int_check_type Checked2, class Allocator2>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<!is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && !is_trivial_cpp_int<cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2> >::value>::type
| eval_add(
| cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2>& a,
| const signed_limb_type& o) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| if (o < 0)
| eval_subtract(result, a, static_cast<limb_type>(boost::multiprecision::detail::unsigned_abs(o)));
| else if (o > 0)
| eval_add(result, a, static_cast<limb_type>(o));
| else if (&result != &a)
| result = a;
| }
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<!is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value>::type
| eval_subtract(
| cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const limb_type& o) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| if (result.sign())
| {
| add_unsigned(result, result, o);
| }
| else
| subtract_unsigned(result, result, o);
| }
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1, unsigned MinBits2, unsigned MaxBits2, cpp_integer_type SignType2, cpp_int_check_type Checked2, class Allocator2>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<!is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && !is_trivial_cpp_int<cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2> >::value>::type
| eval_subtract(
| cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2>& a,
| const limb_type& o) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| if (a.sign())
| {
| add_unsigned(result, a, o);
| }
| else
| {
| subtract_unsigned(result, a, o);
| }
| }
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<!is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value>::type
| eval_subtract(
| cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const signed_limb_type& o) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| if (o)
| {
| if (o < 0)
| eval_add(result, static_cast<limb_type>(boost::multiprecision::detail::unsigned_abs(o)));
| else
| eval_subtract(result, static_cast<limb_type>(o));
| }
| }
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1, unsigned MinBits2, unsigned MaxBits2, cpp_integer_type SignType2, cpp_int_check_type Checked2, class Allocator2>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<!is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && !is_trivial_cpp_int<cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2> >::value>::type
| eval_subtract(
| cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2>& a,
| const signed_limb_type& o) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| if (o)
| {
| if (o < 0)
| eval_add(result, a, static_cast<limb_type>(boost::multiprecision::detail::unsigned_abs(o)));
| else
| eval_subtract(result, a, static_cast<limb_type>(o));
| }
| else if (&result != &a)
| result = a;
| }
|
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<!is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value>::type
| eval_increment(cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| #ifdef BOOST_NO_CXX14_CONSTEXPR
| static const limb_type one = 1;
| #else
| constexpr const limb_type one = 1;
| #endif
| if (!result.sign() && (result.limbs()[0] < cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>::max_limb_value))
| ++result.limbs()[0];
| else if (result.sign() && result.limbs()[0])
| {
| --result.limbs()[0];
| if (!result.limbs()[0])
| result.sign(false);
| }
| else
| eval_add(result, one);
| }
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<!is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value>::type
| eval_decrement(cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| #ifdef BOOST_NO_CXX14_CONSTEXPR
| static const limb_type one = 1;
| #else
| constexpr const limb_type one = 1;
| #endif
| if (!result.sign() && result.limbs()[0])
| --result.limbs()[0];
| else if (result.sign() && (result.limbs()[0] < cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>::max_limb_value))
| ++result.limbs()[0];
| else
| eval_subtract(result, one);
| }
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1, unsigned MinBits2, unsigned MaxBits2, cpp_integer_type SignType2, cpp_int_check_type Checked2, class Allocator2>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<!is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && !is_trivial_cpp_int<cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2> >::value>::type
| eval_subtract(
| cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2>& o) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| eval_subtract(result, result, o);
| }
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1, unsigned MinBits2, unsigned MaxBits2, cpp_integer_type SignType2, cpp_int_check_type Checked2, class Allocator2, unsigned MinBits3, unsigned MaxBits3, cpp_integer_type SignType3, cpp_int_check_type Checked3, class Allocator3>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<!is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && !is_trivial_cpp_int<cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2> >::value && !is_trivial_cpp_int<cpp_int_backend<MinBits3, MaxBits3, SignType3, Checked3, Allocator3> >::value>::type
| eval_subtract(
| cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const cpp_int_backend<MinBits2, MaxBits2, SignType2, Checked2, Allocator2>& a,
| const cpp_int_backend<MinBits3, MaxBits3, SignType3, Checked3, Allocator3>& b) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| if (a.sign() != b.sign())
| {
| add_unsigned(result, a, b);
| return;
| }
| subtract_unsigned(result, a, b);
| }
|
| //
| // Simple addition and subtraction routine for trivial cpp_int's come last:
| //
| // One of the arguments is signed:
| //
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1>
| inline BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<
| is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && (is_signed_number<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value || is_signed_number<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value)>::type
| eval_add(
| cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& o) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| if (result.sign() != o.sign())
| {
| if (*o.limbs() > *result.limbs())
| {
| *result.limbs() = detail::checked_subtract(*o.limbs(), *result.limbs(), typename cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>::checked_type());
| result.negate();
| }
| else
| *result.limbs() = detail::checked_subtract(*result.limbs(), *o.limbs(), typename cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>::checked_type());
| }
| else
| *result.limbs() = detail::checked_add(*result.limbs(), *o.limbs(), typename cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>::checked_type());
| result.normalize();
| }
| // Simple version for two unsigned arguments:
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<
| is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && is_unsigned_number<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && is_unsigned_number<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value>::type
| eval_add(cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& o) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| *result.limbs() = detail::checked_add(*result.limbs(), *o.limbs(), typename cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>::checked_type());
| result.normalize();
| }
|
| // signed subtraction:
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1>
| inline BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<
| is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && (is_signed_number<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value || is_signed_number<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value)>::type
| eval_subtract(
| cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& o) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| if (result.sign() != o.sign())
| {
| *result.limbs() = detail::checked_add(*result.limbs(), *o.limbs(), typename cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>::checked_type());
| }
| else if (*result.limbs() < *o.limbs())
| {
| *result.limbs() = detail::checked_subtract(*o.limbs(), *result.limbs(), typename cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>::checked_type());
| result.negate();
| }
| else
| *result.limbs() = detail::checked_subtract(*result.limbs(), *o.limbs(), typename cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>::checked_type());
| result.normalize();
| }
|
| template <unsigned MinBits1, unsigned MaxBits1, cpp_integer_type SignType1, cpp_int_check_type Checked1, class Allocator1>
| BOOST_MP_FORCEINLINE BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<
| is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && is_trivial_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && is_unsigned_number<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value && is_unsigned_number<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value>::type
| eval_subtract(
| cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& result,
| const cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>& o) BOOST_MP_NOEXCEPT_IF((is_non_throwing_cpp_int<cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1> >::value))
| {
| *result.limbs() = detail::checked_subtract(*result.limbs(), *o.limbs(), typename cpp_int_backend<MinBits1, MaxBits1, SignType1, Checked1, Allocator1>::checked_type());
| result.normalize();
| }
|
| #ifdef _MSC_VER
| #pragma warning(pop)
| #endif
|
| }}} // namespace boost::multiprecision::backends
|
| #endif
|
|
