float_exponent

Get the exponent of an XFL enclosing number

C

🚧 Replaced by macro

This function was replaced by a macro. Please use the macro below in your code instead. To check the validity of the XFL please use float_mantissa in conjunction with this macro.

Concepts

• Floating Point Numbers (XFL)

Behaviour

C

• Return the exponent part of an XFL as a signed integer

Definition

C

Because exponents can be negative, and because negatives are reserved for error states, exponents cannot be returned from functions. Therefore this function has become a macro as shown below.

#define float_exponent(f)\
        (((int32_t)(((f) >> 54U) & 0xFFU)) - 97)

Javascript

const float_exponent = (f) => (Number(((f) >> 54n) & 0xFFn) - 97)

Example

C

int64_t exponent =
    float_exponent(float_one());

Parameters

C

Name	Type	Description
float1	int64_t	An XFL floating point enclosing number