atan2f4

NAME

atan2f4 - return arc tangents of division of float elements

SYNOPSIS

Procedure call syntax:

#include <simdmath.h>

vector float atan2f4(vector float y, vector float x);

Link with -lsimdmath

Inline call syntax:

#include <simdmath.h>

#include <atan2f4.h>

vector float _atan2f4(vector float y, vector float x);

Parameters
y,x	input vectors

DESCRIPTION

The atan2f4 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 atan2f4 returns a float 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 and PPU

CONFORMING TO

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

NOTES

Basis

ISO9899 (C99) atan2 functions.