Status: Assigned
Owner: [email protected]
CC: [email protected], [email protected], [email protected]
Labels: Type-Bug Priority-Medium
New issue 4124 by [email protected]: Implement SIMD.js
https://code.google.com/p/v8/issues/detail?id=4124
We should implement SIMD.js behind a flag.
This issue will track the overall implementation.
SPEC
John Mccutchan’s Strawman proposal:
https://github.com/johnmccutchan/ecmascript_simd
SUMMARY
SIMD.js exposes hardware SIMD instructions to Javascript applications in a
platform-independent way. Add three SIMD vector types: float32x4,
float64x2, and int32x4, and corresponding Typed Array views.
MOTIVATION
SIMD.js can speed up applications that process lots of data that is
naturally organized as 2, 3, or 4 element vectors. SIMD is also useful when
compiling native code to Javascript for static compilation by the
Javascript engine.
COMPATIBILITY RISK
Mozilla has implemented this in Firefox:
https://hacks.mozilla.org/2014/10/introducing-simd-js/
https://blog.mozilla.org/javascript/2015/03/10/state-of-simd-js-performance-in-firefox/
Microsoft have announced plans to implement SIMD.js in Spartan.
Slides: http://channel9.msdn.com/Events/Build/2015/2-763
Video: http://video.ch9.ms/sessions/build/2015/2-763-LG.mp4
SIMD.js discussion starts at minute 45:35 and demoed with Mandelbrot at
time 49:00.
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