fmtlib/fmt
1
0
Fork 1
mirror of https://github.com/fmtlib/fmt.git synced 2025-11-27 21:00:01 +01:00
Code Issues Packages Projects Releases Wiki Activity

Add __float128 support

Browse Source
This commit is contained in:
Victor Zverovich
2022-04-03 08:44:51 -07:00
parent 686de58886
commit f607e3e970
3 changed files with 29 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
include/fmt/format-inl.h
View File

@@ -234,10 +234,10 @@ template <typename F> struct basic_fp {
// The predecessor is closer if n is a normalized power of 2 (f == 0) other
// than the smallest normalized number (biased_e > 1).
auto is_predecessor_closer = f == 0 && biased_e > 1;
if (biased_e != 0)
f += static_cast<F>(implicit_bit);
else
if (biased_e == 0)
biased_e = 1; // Subnormals use biased exponent 1 (min exponent).
else if (has_implicit_bit<Float>())
f += static_cast<F>(implicit_bit);
e = biased_e - exponent_bias<Float>() - num_float_significand_bits;
if (!has_implicit_bit<Float>()) ++e;
return is_predecessor_closer;
@@ -2049,9 +2049,9 @@ enum dragon {
// Formats a floating-point number using a variation of the Fixed-Precision
// Positive Floating-Point Printout ((FPP)^2) algorithm by Steele & White:
// https://fmt.dev/papers/p372-steele.pdf.
FMT_CONSTEXPR20 inline void format_dragon(fp value, unsigned flags,
int num_digits, buffer<char>& buf,
int& exp10) {
FMT_CONSTEXPR20 inline void format_dragon(basic_fp<uint128_t> value,
unsigned flags, int num_digits,
buffer<char>& buf, int& exp10) {
bigint numerator; // 2 * R in (FPP)^2.
bigint denominator; // 2 * S in (FPP)^2.
// lower and upper are differences between value and corresponding boundaries.
@@ -2255,7 +2255,7 @@ FMT_HEADER_ONLY_CONSTEXPR20 int format_float(Float value, int precision,
}
}
if (use_dragon) {
auto f = fp();
auto f = basic_fp<uint128_t>();
bool is_predecessor_closer = specs.binary32
? f.assign(static_cast<float>(value))
: f.assign(converted_value);