SoftFloat-3e for OpenJDK

This is a SoftFloat-3e library with additional build files targetting Linux armel. The intent behind this repository is to make building SoftFloat for OpenJDK on arm-sflt ABI easier.

Why

Software floating point math implementation on Linux on ARM slightly prefers performance over precision of calculations. This presented an issue for Java JCK - these imprecisions were detected. The solution chosen by Java developers was to use SoftFloat-2b library for the problematic operations.

This repository provides an updated SoftFloat-3e library for new versions of OpenJDK, where SoftFloat support is added once again. (see JDK-8215902).

How to use

1. Install a suitable Linux ARM compiler and ensure that arm-linux-gnueabi-gcc executable exists.
2. Go to build/Linux-ARM-VFPv2-GCC-OpenJDK.
3. Run make
4. Run make DESTDIR=... install
5. Configure OpenJDK with --with-sflt=... pointing to DESTDIR.