modfd2

NAME

modfd2 - return signed integer and fraction values from double elements

SYNOPSIS

Procedure call syntax:

#include <simdmath.h>

vector double modfd2(vector double x, vector double *pint);

Link with -lsimdmath

Inline call syntax:

#include <simdmath.h>

#include <modfd2.h>

vector double _modfd2(vector double x, vector double *pint);

Parameters
x	input vector
*pint	pointer to output vector of integers

DESCRIPTION

The modfd2 function determines an integer i plus a fraction frac that represent the value of each element of x. It returns a vector of the values frac and stores a vector of the integers i in *pint for each corresponding element of x, such that:

x = frac + i,
|frac| is in the interval [0,1), and
both frac and i have the same sign as the element of x.

RETURN VALUE

The function modfd2 returns a double vector such that:

the signed fractional portion of the corresponding element of x is returned, and
the integral portion of each corresponding element of x is stored in the vector pointed to by pint.

If an element of y is zero the corresponding element of the result is undefined.

ENVIRONMENT

SPU only

CONFORMING TO

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

NOTES

Basis

ISO9899 (C99) modf functions.