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[i386, PR50740] CPUID leaf 7 for BMI/BMI2/AVX2 feature detection not qualified with max_level and doesn't use subleaf

From: Kirill Yukhin <kirill dot yukhin at gmail dot com>
To: Uros Bizjak <ubizjak at gmail dot com>, "H.J. Lu" <hjl dot tools at gmail dot com>, gcc-patches List <gcc-patches at gcc dot gnu dot org>
Date: Fri, 21 Oct 2011 14:46:56 +0400
Subject: [i386, PR50740] CPUID leaf 7 for BMI/BMI2/AVX2 feature detection not qualified with max_level and doesn't use subleaf

Hello,
Here is the patch which checks CPUID correctly to get BMI/BMI2/AVX2 feature.

ChangeLog entry is:
2011-10-21  H.J. Lu  <hongjiu.lu@intel.com>
	    Kirill Yukhin  <kirill.yukhin@intel.com>

	* config/i386/driver-i386.c (host_detect_local_cpu): Do cpuid 7 only
	if max_level allows that.

testsuite/ChangeLg entry is
2011-10-21  H.J. Lu  <hongjiu.lu@intel.com>
	    Kirill Yukhin  <kirill.yukhin@intel.com>

	* gcc.target/i386/avx2-check.h (main): Check CPU level
	correctly.
	* gcc.target/i386/bmi2-check.h: Ditto.

Bootstrap has passed.
Could you please have a look?

Thanks, K

Attachment: cpuid7.gcc.patch
Description: Binary data

Follow-Ups:
- Re: [i386, PR50740] CPUID leaf 7 for BMI/BMI2/AVX2 feature detection not qualified with max_level and doesn't use subleaf
  - From: Uros Bizjak

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