Module ATAN2 in FDLIBM

General Information

Arctan(y,x). A portable C implementation for machines that support IEEE 754 floating point arithmetic. A wrapper routine is provided for other standards such as SVID, X/OPEN, or POSIX/ANSI.

Usage

r = __ieee754_atan2(y, x)

Classification

C4a	Trigonometric, inverse trigonometric functions

Type

subroutine in FDLIBM package

Language

C

Availability

Public domain, Portable

Precision

Double Precision

Download from NETLIB; Public access repository

Location

The University of Tennessee at Knoxville and Bell Laboratories

Contact

Jack Dongarra, ORNL (dongarra@cs.utk.edu) and Eric Grosse, Bell Labs (ehg@research.att.com)