Issue 1131963004: Cherry pick "Speculative fix for AVX2 detection"

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Issue 1131963004: Cherry pick "Speculative fix for AVX2 detection" (Closed)

Created:
5 years, 7 months ago by Johann

Modified:
5 years, 7 months ago

Reviewers:

CC:
wwcv, jzern, fgalligan1, Tom Finegan

Base URL:
https://chromium.googlesource.com/chromium/deps/libvpx.git@m43-2357

Target Ref:
refs/heads/m43-2357

Visibility:
Public.

Cherry pick "Speculative fix for AVX2 detection" In master since 2386: https://codereview.chromium.org/1104213004 Crashes on non-avx2 processors point to possible misdetection. Cherry pick https://chromium-review.googlesource.com/267345 x86_simd_caps: check max cpuid before testing AVX2 structured extended feature flags require eax = 7; avoids incorrectly detecting avx2 on some older processors that support avx. from [1]: INPUT EAX = 0: Returns CPUID’s Highest Value for Basic Processor Information and the Vendor Identification String [1] http://www.intel.com/content/www/us/en/processors/processor-identification BUG=480586 Committed: https://chromium.googlesource.com/chromium/deps/libvpx/+/ea4ce75ca4525ad42dd90b2a210f99bd2b3a7c03

Created: 5 years, 7 months ago

Download [raw] [tar.bz2]

		Unified diffs	Side-by-side diffs	Delta from patch set	Stats (+8 lines, -6 lines)			Patch
	M	source/libvpx/vpx_ports/x86.h	View		3 chunks	+8 lines, -6 lines	0 comments	Download

Total messages: 1 (0 generated)

Johann

5 years, 7 months ago (2015-05-07 18:43:25 UTC) #1

Message was sent while issue was closed.

Committed patchset #1 (id:1) manually as
ea4ce75ca4525ad42dd90b2a210f99bd2b3a7c03 (presubmit successful).