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johannkoenig authored
Cherry-pick potential divide-by-zero fix https://codereview.chromium.org/877783004 This includes remnants of an attempt to turn on AVX2. That failed and the critical parts have been reverted. However, the attempt revealed some necessary changes which have been kept for the next attempt. These constitute a no-op for this particular roll. Enable AVX2: https://codereview.chromium.org/863143002 Fix GN build: https://codereview.chromium.org/865893004 https://codereview.chromium.org/817293008 https://codereview.chromium.org/866273003 Fix cpu detection: https://codereview.chromium.org/864393002 Disable AVX2: https://codereview.chromium.org/880513003 R=tomfinegan@chromium.org R=yaowu@chromium.org BUG=396572 Review URL: https://codereview.chromium.org/883503002 Cr-Commit-Position: refs/heads/master@{#313182}
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