Is there a Java library for accelerated vector computations?

I'm looking for a Java lib that permits to do some fast computations with vector (and maybe matrices too).

By fast I mean that it takes advantage of GPU processing and/or SSE instructions. I'm wondering if it can be possible to find something more portable as possible. I recognize that the JVM provides a thick abstra开发者_运维百科ction layer of the hardware.

I've come across JCUDA, but there's a drawback: on a computer without an Nnvidia graphic card it should be run in emulation mode (so I come to believe it will be not efficient as expected). Has anyone already tried it?

What about OpenCL? It should provide you a good starting point for this kind of optimized operations.

There exist many bindings for Java, starting from jocl (but take a loot also at JavaCL or LWJGL that added support from 2.6)

If by fast you mean high speed rather than requiring support for your particular hardware, I'd recommend Colt. Vectors are called 1-d matrices in this library.

I'd recommend using UJMP (wraps most if not all of the high-speed Java matrix libraries) and wait for a decent GPGPU implementation to be written for it (I started hacking it with JavaCL a while ago, but it needs some serious rewrite, maybe using ScalaCLv2 that's in the works).