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AK: Add 16-bit float type

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rmg-x 2024-11-09 14:25:05 -06:00 committed by Andrew Kaster
parent 653c8f231d
commit c1ec2ddb63
Notes: github-actions[bot] 2024-11-10 21:49:27 +00:00 
Author: https://github.com/rmg-x
Commit: https://github.com/LadybirdBrowser/ladybird/commit/c1ec2ddb639
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2184
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/trflynn89
5 changed files with 34 additions and 0 deletions
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7
AK/Format.cpp
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@ -1012,6 +1012,13 @@ ErrorOr<void> Formatter<long double>::format(FormatBuilder& builder, long double
return builder.put_f80(value, base, upper_case, m_use_separator, m_align, m_width.value(), m_precision.value(), m_fill, m_sign_mode, real_number_display_mode); return builder.put_f80(value, base, upper_case, m_use_separator, m_align, m_width.value(), m_precision.value(), m_fill, m_sign_mode, real_number_display_mode);
} }
ErrorOr<void> Formatter<f16>::format(FormatBuilder& builder, f16 value)
{
// FIXME: Create a proper put_f16() implementation
Formatter<double> formatter { *this };
return TRY(formatter.format(builder, static_cast<double>(value)));
}
ErrorOr<void> Formatter<double>::format(FormatBuilder& builder, double value) ErrorOr<void> Formatter<double>::format(FormatBuilder& builder, double value)
{ {
u8 base; u8 base;

11
AK/Format.h
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@ -551,6 +551,17 @@ struct Formatter<long double> : StandardFormatter {
ErrorOr<void> format(FormatBuilder&, long double value); ErrorOr<void> format(FormatBuilder&, long double value);
}; };
template<>
struct Formatter<f16> : StandardFormatter {
Formatter() = default;
explicit Formatter(StandardFormatter formatter)
: StandardFormatter(formatter)
{
}
ErrorOr<void> format(FormatBuilder&, f16 value);
};
template<> template<>
struct Formatter<nullptr_t> : Formatter<FlatPtr> { struct Formatter<nullptr_t> : Formatter<FlatPtr> {
ErrorOr<void> format(FormatBuilder& builder, nullptr_t) ErrorOr<void> format(FormatBuilder& builder, nullptr_t)

11
AK/NumericLimits.h
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@ -143,6 +143,17 @@ struct NumericLimits<long double> {
static constexpr size_t digits() { return __LDBL_MANT_DIG__; } static constexpr size_t digits() { return __LDBL_MANT_DIG__; }
}; };
template<>
struct NumericLimits<f16> {
static constexpr f16 lowest() { return -__FLT16_MAX__; }
static constexpr f16 min_normal() { return __FLT16_MIN__; }
static constexpr f16 min_denormal() { return __FLT16_DENORM_MIN__; }
static constexpr f16 max() { return __FLT16_MAX__; }
static constexpr f16 epsilon() { return __FLT16_EPSILON__; }
static constexpr bool is_signed() { return true; }
static constexpr size_t digits() { return __FLT16_MANT_DIG__; }
};
} }
#if USING_AK_GLOBALLY #if USING_AK_GLOBALLY

2
AK/StdLibExtraDetails.h
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@ -350,6 +350,8 @@ template<>
inline constexpr bool __IsFloatingPoint<double> = true; inline constexpr bool __IsFloatingPoint<double> = true;
template<> template<>
inline constexpr bool __IsFloatingPoint<long double> = true; inline constexpr bool __IsFloatingPoint<long double> = true;
template<>
inline constexpr bool __IsFloatingPoint<f16> = true;
template<typename T> template<typename T>
inline constexpr bool IsFloatingPoint = __IsFloatingPoint<RemoveCV<T>>; inline constexpr bool IsFloatingPoint = __IsFloatingPoint<RemoveCV<T>>;

3
AK/Types.h
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@ -17,6 +17,9 @@ using i32 = __INT32_TYPE__;
using i16 = __INT16_TYPE__; using i16 = __INT16_TYPE__;
using i8 = __INT8_TYPE__; using i8 = __INT8_TYPE__;
using f16 = _Float16;
static_assert(__FLT16_MANT_DIG__ == 11 && __FLT16_MAX_EXP__ == 16);
using f32 = float; using f32 = float;
static_assert(__FLT_MANT_DIG__ == 24 && __FLT_MAX_EXP__ == 128); static_assert(__FLT_MANT_DIG__ == 24 && __FLT_MAX_EXP__ == 128);