[Webkit-unassigned] [Bug 233529] New: REGRESSION(r283855) [GTK][WPE] imported/w3c/web-platform-tests/webaudio/the-audio-api/the-pannernode-interface/panner-equalpower.html fails

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=233529

            Bug ID: 233529
           Summary: REGRESSION(r283855) [GTK][WPE]
                    imported/w3c/web-platform-tests/webaudio/the-audio-api
                    /the-pannernode-interface/panner-equalpower.html fails
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Audio
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: agoldmints at igalia.com
                CC: cdumez at apple.com

In r283855, EqualPowerPanner::pan() was modified to use vector instructions where available. This caused a regression on GTK and WPE in the test imported/w3c/web-platform-tests/webaudio/the-audio-api/the-pannernode-interface/panner-equalpower.html, presumably because of some problem in the implementation of VectorMath::multiplyByScalarThenAddToVector() which is implemented in the WebKit code for non-Apple platforms but uses an Apple library on Apple platforms.

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