Skip to main content

Python bindings for CRlibm, an efficient and proven correctly-rounded mathematical library

Project description

Travis CI build status (Linux) AppVeyor CI build status (Windows) Latest PyPI version Documentation Status

Python bindings for CRlibm, an efficient and proven correctly-rounded mathematical library.

CRlibm is a free mathematical library (libm) which provides:

  • implementations of the double-precision C99 standard elementary functions,

  • correctly rounded in the four IEEE-754 rounding modes,

  • with a comprehensive proof of both the algorithms used and their implementation,

  • sufficiently efficient in average time, worst-case time, and memory consumption to replace existing libms transparently.

Installation

At the command line:

$ pip install crlibm

On Microsoft Windows pip will try first to download a binary archive in wheel format, and if no such a wheel can be found for your Python version, pip will try to compile the library. In order to do so, it is strongly recommended to have MinGW-w64 installed under MSYS2, for instance by following the instructions in http://stackoverflow.com/a/30071634.

Usage

In Python:

>>> import crlibm
>>> crlibm.exp_ru(1)
2.7182818284590455

>>> crlibm.exp_rd(1)
2.718281828459045

Features

  • This project provides the bindings for the functions in the following table:

f(x)

Round to nearest

Round up (to +∞)

Round down (to -∞)

Round to 0

Exponentials and logarithms

exp(x)

exp_rn

exp_ru

exp_rd

exp_rz

exp(x)-1

expm1_rn

expm1_ru

expm1_rd

expm1_rz

log(x)

log_rn

log_ru

log_rd

log_rz

log(1+x)

log1p_rn

log1p_ru

log1p_rd

log1p_rz

log(x)/log(2)

log2_rn

log2_ru

log2_rd

log2_rz

log(x)/log(10)

log10_rn

log10_ru

log10_rd

log10_rz

sinh(x)

sinh_rn

sinh_ru

sinh_rd

sinh_rz

cosh(x)

cosh_rn

cosh_ru

cosh_rd

cosh_rz

Trigonometry

sin(x)

sin_rn

sin_ru

sin_rd

sin_rz

cos(x)

cos_rn

cos_ru

cos_rd

cos_rz

tan(x)

tan_rn

tan_ru

tan_rd

tan_rz

asin(x)

asin_rn

asin_ru

asin_rd

asin_rz

acos(x)

acos_rn

acos_ru

acos_rd

acos_rz

atan(x)

atan_rn

atan_ru

atan_rd

atan_rz

Trigonometry in multiples of π

sin(π * x)

sinpi_rn

sinpi_ru

sinpi_rd

sinpi_rz

cos(π * x)

cospi_rn

cospi_ru

cospi_rd

cospi_rz

tan(π * x)

tanpi_rn

tanpi_ru

tanpi_rd

tanpi_rz

asin(x)/π

asinpi_rn

asinpi_ru

asinpi_rd

asinpi_rz

acos(x)/π

acospi_rn

acospi_ru

acospi_rd

acospi_rz

atan(x)/π

atanpi_rn

atanpi_ru

atanpi_rd

atanpi_rz

  • The function pow in CRlibm is not exported.

License

Both the CRlibm library and the Python bindings are distributed under the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

Authors

David Defour, Catherine Daramy, Florent de Dinechin, Matthieu Gallet, Nicolas Gast, Christoph Lauter, Jean-Michel Muller.

Python bindings by Stefano Taschini.

History

1.0.3 (2016-06-09)

  • Fixed the compilation with Python 3.5 on Windows.

1.0.2 (2016-06-06)

  • Added support for Python 3.

1.0.1 (2015-11-15)

  • Improvements to the build process on MS Windows;

  • Automatic upload of release files to PyPI using Appveyor.

1.0.0 (2015-10-27)

  • Spun off these binding from PyInterval, a project for interval arithmetic in Python.

  • First release on PyPI.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

crlibm-1.0.3.tar.gz (1.6 MB view hashes)

Uploaded source

Built Distributions

crlibm-1.0.3-cp35-cp35m-win_amd64.whl (231.0 kB view hashes)

Uploaded cp35

crlibm-1.0.3-cp35-cp35m-win32.whl (227.4 kB view hashes)

Uploaded cp35

crlibm-1.0.3-cp34-cp34m-win_amd64.whl (231.0 kB view hashes)

Uploaded cp34

crlibm-1.0.3-cp34-cp34m-win32.whl (227.4 kB view hashes)

Uploaded cp34

crlibm-1.0.3-cp33-none-win_amd64.whl (231.0 kB view hashes)

Uploaded cp33

crlibm-1.0.3-cp33-none-win32.whl (227.4 kB view hashes)

Uploaded cp33

crlibm-1.0.3-cp27-cp27m-win_amd64.whl (231.0 kB view hashes)

Uploaded 2 7

crlibm-1.0.3-cp27-cp27m-win32.whl (227.4 kB view hashes)

Uploaded 2 7

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Huawei Huawei PSF Sponsor Microsoft Microsoft PSF Sponsor NVIDIA NVIDIA PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page