提供 16 位浮点支持。

qfloat16 class provides support for half-precision (16-bit) floating point data. It is fully compliant with IEEE 754 as a storage type. This implies that any arithmetic operation on a qfloat16 instance results in the value first being converted to a float . This conversion to and from float is performed by hardware when possible, but on processors that do not natively support half-precision, the conversion is performed through a sequence of lookup table operations.

qfloat16 should be treated as if it were a POD (plain old data) type. Consequently, none of the supported operations need any elaboration beyond stating that it supports all arithmetic operators incident to floating point types.

Defining this macro disables the arithmetic operators for qfloat16.

This is only necessary on Visual Studio 2017 (and earlier) when including <QFloat16> and <bitset> in the same translation unit, which would otherwise cause a compilation error due to a toolchain bug (see [QTBUG-72073]).

Returns a qfloat16 with the sign of sign but the rest of its value taken from this qfloat16. Serves as qfloat16’s equivalent of std::copysign().

实现 qFpClassify() for qfloat16.

另请参阅

qFpClassify()

返回 true 若此 qfloat16 值是有限的且采用正常形式。

另请参阅

qFpClassify()

转换 len qfloat16 from in to floats and stores them in out . Both in and out must have len allocated entries.

转换 len floats from in to qfloat16 and stores them in out . Both in and out must have len allocated entries.

比较浮点值 p1 and p2 并返回 true 若它们被认为相等，否则 false .

The two numbers are compared in a relative way, where the exactness is stronger the smaller the numbers are.

返回 true 若 qfloat16 f 是有限数。

另请参阅

qIsFinite

返回 true 若 qfloat16 f 相当于无穷大。

另请参阅

qIsInf

返回 true 若 qfloat16 f 是 NaN (非数字)。

另请参阅

qIsNaN

圆整 value 到最近整数。

另请参阅

qRound

圆整 value 到最近 64 位整数。

另请参阅

qRound64