I queried a guru here at work and got the following response:
It is the responsibility of the OS to indicate to the CPU that it supports SSE2 instructions by setting the OSFXSR bit in CR4. If they are running a legacy OS that doesn't support SSE2 (meaning that it isn't using the FXSAVE and FXR
... Does anybody know answer
by hard
Wow! Of course I meant "by heart."
or has a system with some legacy OS in her/his disposal we could
test this on?
Test won't require access to the system over Internet or similar. You'll
be asked to compile couple of trivial code snippets and execut
A work is being done toward adopting IA-32 SSE2 code pathes in OpenSSL:
bn_mul_add_words and SHA-512 at present. Whether or not a path is taken
is decided at run-time. Formally the decision is be taken upon two
factors: CPU capability and kernel support for SSE extentions. As it
doesn't appear
