<QFloat16>
This documentation was introduced in Qt 5.9.
Functions
| bool | qFuzzyCompare(qfloat16 p1, qfloat16 p2) |
| bool | qIsFinite(qfloat16 f) |
| bool | qIsInf(qfloat16 f) |
| bool | qIsNaN(qfloat16 f) |
| qint64 | qRound64(qfloat16 value) |
| int | qRound(qfloat16 value) |
This header file provides support for half-precision (16-bit) floating point data with the class qfloat16. 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.
函数
bool qFuzzyCompare(qfloat16 p1, qfloat16 p2)
Compares the floating point value p1 and p2 and returns true if they are considered equal, otherwise false.
The two numbers are compared in a relative way, where the exactness is stronger the smaller the numbers are.
bool qIsFinite(qfloat16 f)
Returns true if the qfloat16 f is a finite number.
参见 qIsFinite.
bool qIsInf(qfloat16 f)
Returns true if the qfloat16 f is equivalent to infinity.
参见 qIsInf.
bool qIsNaN(qfloat16 f)
Returns true if the qfloat16 f is not a number (NaN).
参见 qIsNaN.
qint64 qRound64(qfloat16 value)
Rounds value to the nearest 64-bit integer.
参见 qRound64.
int qRound(qfloat16 value)
Rounds value to the nearest integer.
参见 qRound.