Intent to Ship: WebAssembly SIMD
Zhi An Ng
gde...@chromium.org, natt...@chromium.org, zh...@chromium.org
Explainer
https://github.com/WebAssembly/simd/blob/master/proposals/simd/SIMD.md
https://github.com/WebAssembly/simd/blob/master/proposals/simd/W3CTAG-SIMDExplainer.md
Specification
https://github.com/WebAssembly/simd/blob/master/proposals/simd/SIMD.md
Design docs
https://github.com/WebAssembly/simd/tree/master/proposals/simd
Summary
WebAssembly SIMD will expose hardware SIMD instructions to WebAssembly applications in a platform-independent way. The SIMD proposal introduces a new 128-bit value type that can be used to represent different types of packed data, and several vector operations that operate on packed data.
SIMD can boost performance by exploiting data level parallelism and is also useful when compiling native code to WebAssembly
WebAssembly SIMD successfully progressed to Phase 4 in the WebAssembly W3C process (https://github.com/WebAssembly/meetings/blob/master/main/2021/CG-02-16.md#fixed-width-simd-zhi-an-ng---slides10-min).
Blink component
Search tags
WebAssembly, wasm, SIMD, SIMD.js
TAG review
https://github.com/w3ctag/design-reviews/issues/487
TAG review status
Issues addressed
Risks
Interoperability and Compatibility
Gecko: In development (https://bugzilla.mozilla.org/show_bug.cgi?id=1625130)
WebKit: No signal (https://lists.webkit.org/pipermail/webkit-dev/2021-February/031696.html)
Web developers: Positive
Is this feature fully tested by web-platform-tests?
No, but covered by WebAssembly spec tests (https://v8.dev/docs/feature-launch-process#tests and https://github.com/WebAssembly/simd/tree/master/test/core/simd).
Tracking bug
https://bugs.chromium.org/p/v8/issues/detail?id=6020&desc=2
Link to entry on the Chrome Platform Status
https://www.chromestatus.com/feature/6533147810332672
Links to previous Intent discussions
Intent to Experiment: https://groups.google.com/a/chromium.org/g/blink-dev/c/y3z1Q4HnpgY/m/SURHtNTJAQAJ
Intent to Extend Origin Trial 1 (M87-M88):
https://groups.google.com/a/chromium.org/g/blink-dev/c/6ZUHoEUQeEI/m/uzivlQFUAgAJ
Intent to Extend Origin Trial 2 (M89-M90):
https://groups.google.com/a/chromium.org/g/blink-dev/c/bw_RgyH4Xss/m/hPtsEbwRAQAJ
Requesting exception to required breaking period
Developer engagement
https://blog.tensorflow.org/2020/09/supercharging-tensorflowjs-webassembly.html
https://brionv.com/log/2019/03/03/simd-in-webassembly-tales-from-the-bleeding-edge/
https://www.youtube.com/watch?v=9jh4OBeKENs
https://ai.googleblog.com/2020/10/background-features-in-google-meet.html
Yoav Weiss
WebKit: No signal (https://lists.webkit.org/pipermail/webkit-dev/2021-February/031696.html)
Web developers: Positive
Is this feature fully tested by web-platform-tests?
No, but covered by WebAssembly spec tests (https://v8.dev/docs/feature-launch-process#tests and https://github.com/WebAssembly/simd/tree/master/test/core/simd).
Tracking bughttps://bugs.chromium.org/p/v8/issues/detail?id=6020&desc=2
Link to entry on the Chrome Platform Statushttps://www.chromestatus.com/feature/6533147810332672
Links to previous Intent discussionsIntent to Experiment: https://groups.google.com/a/chromium.org/g/blink-dev/c/y3z1Q4HnpgY/m/SURHtNTJAQAJ
Intent to Extend Origin Trial 1 (M87-M88):
https://groups.google.com/a/chromium.org/g/blink-dev/c/6ZUHoEUQeEI/m/uzivlQFUAgAJ
Intent to Extend Origin Trial 2 (M89-M90):
https://groups.google.com/a/chromium.org/g/blink-dev/c/bw_RgyH4Xss/m/hPtsEbwRAQAJ
Requesting exception to required breaking period
Developer engagement
https://blog.tensorflow.org/2020/09/supercharging-tensorflowjs-webassembly.html
https://brionv.com/log/2019/03/03/simd-in-webassembly-tales-from-the-bleeding-edge/
https://www.youtube.com/watch?v=9jh4OBeKENs
https://ai.googleblog.com/2020/10/background-features-in-google-meet.html
This intent message was generated by Chrome Platform Status.
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Ben Kelly
On Mon, Feb 22, 2021 at 8:00 PM Zhi An Ng <zh...@chromium.org> wrote:Interoperability and CompatibilityGecko: In development (https://bugzilla.mozilla.org/show_bug.cgi?id=1625130)
That doesn't seem accurate, as I don't see a ton of actual activity on that bug.have you tried reaching out? Alternatively, were they involved in the WG decision to move this to phase 4?
Yoav Weiss
Zhi An Ng
On Wed, Feb 24, 2021 at 4:20 PM Ben Kelly <wande...@chromium.org> wrote:On Wed, Feb 24, 2021 at 9:28 AM Yoav Weiss <yo...@yoav.ws> wrote:On Mon, Feb 22, 2021 at 8:00 PM Zhi An Ng <zh...@chromium.org> wrote:Interoperability and CompatibilityGecko: In development (https://bugzilla.mozilla.org/show_bug.cgi?id=1625130)
That doesn't seem accurate, as I don't see a ton of actual activity on that bug.have you tried reaching out? Alternatively, were they involved in the WG decision to move this to phase 4?
Zhi An Ng
Yoav Weiss
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Manuel Rego Casasnovas
On 24/02/2021 22:38, Yoav Weiss wrote:
> Thanks for collecting those signals!
>
> LGTM1
>
> On Wed, Feb 24, 2021 at 10:31 PM Zhi An Ng <zh...@chromium.org
> <mailto:zh...@chromium.org>> wrote:
>
> As a follow up:
>
> Gecko: Shipping, "We support this and will be shipping it, initially
> for Intel CPUs, almost certainly in FF89; ARM64 support to follow,
> likely FF90."
> (https://github.com/mozilla/standards-positions/issues/491#issuecomment-785303882
> generally have a positive opinion of it."
> (https://lists.webkit.org/pipermail/webkit-dev/2021-February/031705.html
> On Wednesday, February 24, 2021 at 8:59:52 AM UTC-8 Zhi An Ng wrote:
>
> On Wednesday, February 24, 2021 at 7:41:49 AM UTC-8
> yo...@yoav.ws wrote:
>
> On Wed, Feb 24, 2021 at 4:20 PM Ben Kelly
> <wande...@chromium.org> wrote:
>
> On Wed, Feb 24, 2021 at 9:28 AM Yoav Weiss
> <yo...@yoav.ws> wrote:
>
> On Mon, Feb 22, 2021 at 8:00 PM Zhi An Ng
> <zh...@chromium.org> wrote:
>
> Interoperability and Compatibility
>
> Gecko: In development
> (https://bugzilla.mozilla.org/show_bug.cgi?id=1625130
> That doesn't seem accurate, as I don't see a ton of
> actual activity on that bug.
> have you tried reaching out
>
>
> Yes, they were involved in the WG decision, in particular Lars
> Hansen was present at that CG meeting
> (https://github.com/WebAssembly/meetings/blob/master/main/2021/CG-02-16.md#introduction-of-attendees
> present in almost all of the meetings, it's a bit manual but you
> can click into each issue in
> https://github.com/WebAssembly/simd/issues?q=is%3Aissue+is%3Aclosed+agenda
> <https://github.com/WebAssembly/simd/issues?q=is%3Aissue+is%3Aclosed+agenda>
> and look at the notes to see the list of participants, or this
> shows his activity on the issue tracker
> https://github.com/WebAssembly/simd/issues?q=is%3Aissue+commenter%3Alars-t-hansen
> I've filed an issue on mozilla/standards-positions
> https://github.com/mozilla/standards-positions/issues/491
>
> FWIW you have to look at the dependencies on that bug.
> Last I checked WASM SIMD was working in firefox
> nightly. (But, yes, asking on
> mozilla/standards-positions would be good.)
>
>
> Good point, I missed that...
>
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