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Added support for small -long double- types

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[SVN r22025]
This commit is contained in:
Guillaume Melquiond 2004-01-28 21:29:59 +00:00
parent 1fe4edab1f
commit 66a3211887
1 changed files with 22 additions and 12 deletions
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34
include/boost/numeric/interval/detail/x86_rounding_control.hpp
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@ -79,22 +79,32 @@ struct rounding_control<double>: detail::x86_rounding_control
{ volatile double r_ = r; return r_; }
};
namespace detail {
template<bool>
struct x86_rounding_control_long_double;
template<>
struct rounding_control<long double>: detail::x86_rounding_control
struct x86_rounding_control_long_double<false>: x86_rounding_control
{
static long double force_rounding(const long double& r)
{
// Some compilers use "double == long double", so we may need to
// round (from FPU registers into memory) in this case as well.
if(sizeof(long double) > 8) {
return r;
} else {
volatile long double r_ = r;
return r_;
}
}
static long double force_rounding(long double const &r)
{ volatile long double r_ = r; return r_; }
};
template<>
struct x86_rounding_control_long_double<true>: x86_rounding_control
{
static long double const &force_rounding(long double const &r)
{ return r; }
};
} // namespace detail
template<>
struct rounding_control<long double>:
detail::x86_rounding_control_long_double< (sizeof(long double) >= 10) >
{};
} // namespace interval_lib
} // namespace numeric
} // namespace boost