Hi,
r...@openssl.org via RT 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? 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
BTW, _lrotl fix is applied to 1.0.1, but not earlier versions, which are
open for security fixes only.
I can confirm that a clean build of openssl 1.0.2a using the above
./Configure line works for me. The resulting binary runs without issues.
JJK
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