frexpd2

NAME

frexpd2 - return fractions and exponents of double elements

SYNOPSIS

Procedure call syntax:

#include <simdmath.h>

vector double frexpd2(vector double x, vector signed long long *pexp);

Link with -lsimdmath

Inline call syntax:

#include <simdmath.h>

#include <frexpd2.h>

vector double _frexpd2(vector double x, vector signed long long *pexp);

Parameters
x	input vector
*pexp	pointer to output vector

DESCRIPTION

The frexpd2 function is used to split the values of the elements in x into a normalized fraction and an exponent. frexpd2 returns a vector of fractions and a vector of exponent integers in *pexp.

Each fraction element frac, and each exponent integer element exp, represent the value of the corresponding element x, such that:

Every element of |frac| is in the interval or is 0.
$x=frac*2^exp$
If an element of x is 0 the corresponding element of *pexp is also 0.

RETURN VALUE

The function frexpd2 returns:

a double vector in which each element is defined as the normalized fraction of the corresponding element of x, and
a signed long long* vector in which each element is defined as the exponent such that 2 raised to this value and multiplied by the normalized fraction is equal to x.

ENVIRONMENT

SPU only

CONFORMING TO

SIMD Math library specification for the Cell Broadband Engine™ Architecture.

NOTES

Basis

ISO9899 (C99) frexp functions.