Skip to main content

A nmigen (HDL) IEEE754 Floating-Point library

Project description

# IEEE754 Floating-Point ALU, in nmigen

This project implements a pipelined IEEE754 floating-point ALU that supports FP16, FP32 and FP64. It is a general-purpose unit that may be used in any project (not limited to one specific processor).

Developed under a Grant from NLnet (http://nlnet.nl), more information may be found at http://libre-soc.org

# Requirements

  • nmigen
  • libresoc-nmutil
  • yosys (latest git repository, required by nmigen)
  • sfpy (running unit tests). provides python bindings to berkeley softfloat-3

# Building sfpy

The standard sfpy will not work without being modified to the type of IEEE754 FP emulation being tested. This FPU is emulating RISC-V, and there is some weirdness in x86 IEEE754 implementations when it comes to FP16 non-canonical NaNs.

The following modifications are required to the sfpy berkeley-softfloat-3 submodule:

cd /path/to/sfpy/berkeley-softfloat-3 git apply /path/to/ieee754fpu/berkeley-softfloat.patch

The following modifications are required to the sfpy SoftPosit Makefile:

cd /path/to/sfpy/SoftPosit git apply /path/to/ieee754fpu/SoftPosit.patch

# Useful resources

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

libresoc-ieee754fpu-0.0.1.tar.gz (186.9 kB view hashes)

Uploaded source

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