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Improve __float128 support

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This commit is contained in:
Victor Zverovich
2022-03-19 09:33:40 -07:00
parent 71778e8b90
commit 3f9b7433a3
2 changed files with 13 additions and 6 deletions
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8
include/fmt/format-inl.h
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@@ -217,8 +217,10 @@ template <typename F> struct basic_fp {
template <typename Float> FMT_CONSTEXPR basic_fp(Float n) { assign(n); }
template <typename Float>
using is_supported = bool_constant<std::numeric_limits<Float>::is_iec559 &&
std::numeric_limits<Float>::digits <= 113>;
using is_supported =
bool_constant<(std::numeric_limits<Float>::is_iec559 &&
std::numeric_limits<Float>::digits <= 113) ||
is_float128<Float>::value>;
// Assigns d to this and return true iff predecessor is closer than successor.
template <typename Float, FMT_ENABLE_IF(is_supported<Float>::value)>
@@ -229,7 +231,7 @@ template <typename F> struct basic_fp {
<< detail::num_significand_bits<Float>();
const carrier_uint significand_mask = implicit_bit - 1;
auto u = bit_cast<carrier_uint>(n);
f = static_cast<uint64_t>(u & significand_mask);
f = static_cast<F>(u & significand_mask);
int biased_e = static_cast<int>((u & exponent_mask<Float>()) >>
detail::num_significand_bits<Float>());
// The predecessor is closer if n is a normalized power of 2 (f == 0) other