x86-64: Require BMI2 for __strlen_evex and __strnlen_evex
Since __strlen_evex and __strnlen_evex added by commit 1fd8c163 Author: H.J. Lu <hjl.tools@gmail.com> Date: Fri Mar 5 06:24:52 2021 -0800 x86-64: Add ifunc-avx2.h functions with 256-bit EVEX use sarx: c4 e2 6a f7 c0 sarx %edx,%eax,%eax require BMI2 for __strlen_evex and __strnlen_evex in ifunc-impl-list.c. ifunc-avx2.h already requires BMI2 for EVEX implementation. (cherry picked from commit 55bf411b)
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