JCL Help:MakeSignalingNaN@Double@TNaNTag

 JCL Help: MakeSignalingNaN Function

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Summary

Makes X a signaling NaN.

Pascal

 procedure MakeSignalingNaN(var X: Single; Tag: TNaNTag = 0); overload;
procedure MakeSignalingNaN(var X: Double; Tag: TNaNTag = 0); overload;
procedure MakeSignalingNaN(var X: Extended; Tag: TNaNTag = 0); overload;

Parameters

Parameters	Description
var X: Single	The floating point variable to change into a SNaN.
Tag: TNaNTag = 0	An integer value to be encoded in the resulting NaN value.

Description

Makes a floating point variable X a signaling NaN (SNaN). An SNaN is a NaN with the most significant fraction bit clear. SNaNs generally signal an floating-point invalidoperation exception whenever they appear as operands in arithmetic operations. SNaNs are typically used to trap or invoke an exception handler. They must be inserted by software; that is, the processor never generates an SNaN as a result of a floating-point operation.

See Also

TFloatingPointClass TNaNTag MakeQuietNaN GetNaNTag

About

Unit

JclMath

Donator

Robert Rossmair

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