CORDIC
Approximation of Elementary Functions

CORDIC is a Python library which uses the CORDIC algorithm to evaluate certain functions, in particular the sine and cosine.

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Languages:

CORDIC is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.

Related Data and Programs:

FN, a Python library which approximates elementary and special functions using Chebyshev polynomials, by Wayne Fullerton.

POLPAK, a Python library which evaluates a variety of mathematical functions.

TEST_VALUES, a Python library which returns some tabulated values of various functions.

Reference:

1. Pitts Jarvis,
   Implementing CORDIC Algorithms,
   Dr. Dobb's Journal,
   October 1990.
2. Jean-Michel Muller,
   Elementary Functions: Algorithms and Implementation,
   Second Edition,
   Birkhaeuser, 2006,
   ISBN13: 978-0-8176-4372-0,
   LC: QA331.M866.
3. Allan Sultan,
   CORDIC: How Hand Calculators Calculate,
   The College Mathematics Journal,
   Volume 40, Number 2, March 2009, pages 87-92.
4. Jack Volder,
   The CORDIC Computing Technique,
   IRE Transactions on Electronic Computers,
   Volume 8, Number 3, pages 330-334, 1959.
5. Jack Volder,
   The Birth of CORDIC,
   Journal of VLSI Signal Processing Systems,
   Volume 25, Number 2, pages 101-105, June 2000.
6. Anthony Williams,
   Optimizing Math-Intensive Applications with Fixed-Point Arithmetic,
   Dr Dobb's Journal,
   Volume 33, Number 4, April 2008, pages 38-43.

Source Code:

• cordic.py, the source code;
• cordic_test.sh, a shell script which runs the tests;
• cordic_test.txt, the sample output.

You can go up one level to the Python source codes.