> On May 26, 2015, at 4:57 PM, Andy Polyakov <[email protected]> wrote: > >>>> And linux-x86_64 won't work here, since it uses some instructions not >>>> supported by MIC. >>> >>> But all x86_64 modules feature run-time switch, when processor >>> capabilities are detected [with cpuid] and code that can't be executed >>> on any particular processor won't execute. Or do you mean that fails to >>> *compile* it with -mmic? Or do you mean that cpuid doesn't work on mic? >>> But I recall that there is cpuid... >> >> It fails to compile with -mmic: >> x86_64cpuid.s:165: Error: `pxor' is not supported on `k1om' > > I see, thanks. In other words, as it turns out my suggestion about > run-time switch does not apply in this case, because minimum of SSE2 is > actually *assumed* for x86_64 platform. And this doesn't hold true for > Knights Corner. But it does hold true for Knights Landing, doesn't it?
Yes, Knights Landing supposedly implements AVX512, which is backward compatible with older SIMD instructions. > I see no point in attempting to accommodate assembler support for Knights > Corner (too rare processor) and would appreciate if you could confirm if > following works with 1.0.2: > > ./Configure linux-x86_64-icc no-asm -mmic Yes, it works. Solar, should I update JtR's READ-MIC to switch back to using OpenSSL? BTW, I'm not sure if switching between OpenSSL and LibreSSL would cause performance variation. Lei _______________________________________________ openssl-dev mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-dev
