rsqrtf4

NAME

rsqrtf4 - return the reciprocals of the square roots of float elements

Procedure call syntax:

#include <simdmath.h>

vector float rsqrtf4(vector float x);

Link with -lsimdmath

Inline call syntax:

#include <simdmath.h>

#include <rsqrtf4.h>

vector float _rsqrtf4(vector float x);

Parameters
x	input vector

The rsqrtf4 function returns a vector of the reciprocals of the square roots of the corresponding elements of x.

The function rsqrtf4 returns a float vector in which each element is defined as:

the reciprocal of the square root of the corresponding element of x.
When an element of x is less than 0:
- on the PPU the result isNaN,
- on the SPU the result is undefined.
When an element of x is +Inf the result is +0.
When an element of x is 0 the result is Inf with the sign of the corresponding element of x.
When an element of x is NaN the result is NaN.

SPU and PPU

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