atan2d2

NAME

atan2d2 - return arc tangents of division of double elements

SYNOPSIS

Procedure call syntax:

#include <simdmath.h>

vector double atan2d2(vector double y, vector double x);

Link with -lsimdmath

Inline call syntax:

#include <simdmath.h>

#include <atan2d2.h>

vector double _atan2d2(vector double y, vector double x);

Parameters
y,x	input vectors

DESCRIPTION

The atan2d2 function calculates the arc tangents of each of the elements in y and x. This function is similar to computing atan(y/x); however the sign of each of the elements is used to determine the quadrant of the result.

RETURN VALUE

The function atan2d2 returns a double vector in which each element is defined as the arc tangent of y/x using the signs of y and x to determine the quadrant of the result.

ENVIRONMENT

SPU only

CONFORMING TO

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

NOTES

Basis

ISO9899 (C99) atan2 functions.