Fused multiply-add (with a single rounding) for Python.

Nico Schlömer

Last update: Nov 8, 2022

Related tags

Miscellaneous python pypi

Overview

pyfma

Fused multiply-add computes (x*y) + z with a single rounding. Useful for dot products, matrix multiplications, polynomial evaluations (e.g., with Horner's rule), Newton's method for evaluating functions, convolutions, artificial neural networks etc.

Use as

import pyfma

out = pyfma.fma(3.0, 2.0, 1.0)  # 3.0*2.0 + 1.0 = 7.0

Also works with NumPy inputs:

import numpy
import pyfma

x = numpy.random.rand(3, 4, 5)
y = numpy.random.rand(3, 4, 5)
z = numpy.random.rand(3, 4, 5)

out = pyfma.fma(x, y, z)

Built with pybind11.

Caution The C/C++ implementation of FMA in MS Windows is reportedly broken. Use with care.

Installation

pyfma can be installed from the Python Package Index, so with

pip install pyfma

you can install/upgrade.

Manual installation

For manual installation (if you're a developer or just really keen on getting the bleeding edge version of pyfma), there are two possibilities:

Get the sources, do pip install .. This does the trick most the time.
As a fallback, there's a CMake-based installation. Simply go cmake /path/to/sources/ and make.

Testing

To run the pyfma unit tests, check out this repository and type

tox

A Kodi add-on for watching content hosted on PeerTube.

A Kodi add-on for watching content hosted on PeerTube. This add-on is under development so only basic features work, and you're welcome to improve it.

1 Dec 18, 2021

A script to add issues to a project in Github based on label or status.

Add Github Issues to Project (Beta) A python script to move Github issues to a next-gen (beta) Github Project Getting Started These instructions will

3 Jan 16, 2022

The repository for AnyMacro: a Fusion360 Add-In

AnyMacro AnyMacro is an Autodesk® Fusion 360™ add-in for chaining multiple commands in a row to form Macros. Macros are created from a set of commands

1 Jan 7, 2022

TB Set color display - Add-on for Blender to set multiple objects and material Display Color at once.

TB_Set_color_display Add-on for Blender with operations to transfer name between object, data, materials and action names Set groups of object's or ma

1 Jun 1, 2022

This repo contains scripts that add functionality to xbar.

xbar-custom-plugins This repo contains scripts that add functionality to xbar. Usage You have to add scripts to xbar plugin folder. If you don't find

1 Jan 10, 2022

A clipboard where a user can add and retrieve multiple items to and from (resp) from the clipboard cache.

2 Feb 7, 2022

It's just a simple script to add all contest from site to your Google Calendar and make two reminder for them one before the contest one day, and another before half an hour, the event on Google Calendar have the registration link of the contest.

CP-Calendar It's just a simple script to add all contest from site to your Google Calendar and make two reminder for them one before the contest one d

12 Oct 17, 2022

Ikaros is a free financial library built in pure python that can be used to get information for single stocks, generate signals and build prortfolios

64 Sep 28, 2022

A simple single-color identicon generator

Identicons What are identicons? Setup: git clone https://github.com/vjdad4m/identicons.git cd identicons pip3 install -r requirements.txt chmod +x

1 Oct 31, 2021

Comments

Build failure on macOS Catalina

I have Python 3.8 installed on my Mac via MacPorts. In a new venv, doing pip install pyfma results in a failure, and looking at the errors it is caused by failing to include the flag -std=c++11. Installing requires CFLAGS='-std=c++11' pip install pyfma. My exact compiler version is Apple clang version 12.0.0 (clang-1200.0.32.2), which is the compiler that comes with Xcode 12.

opened by SerpentChris 3
fma32

Hi,

Thank you for the great tool. I am curious whether it is difficult to add support of FMA operation for float numbers additionally to the current double implementation. It would be really helpful for testing and debugging various numerical algorithms in plenty of software using float due to speed reasons.

Cheers

opened by Vutshi 1
Unmarked dependency on numpy.
Steps to reproduce:

Make and activate a fresh virtualenv.

Install pyfma via pip

Run the command python -c "import pyfma; pyfma.fma(1,2,3)"

The result is ModuleNotFoundError: No module named 'numpy'.

What I expect is to either be able to use pyfma without numpy, or for pyfma to automatically have pip download and install numpy when I install pyfma. I'm not an expert at setuptools but I think the first case requires making numpy an optional dependency, while the second case requires making numpy a required dependency.
opened by SerpentChris 0