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[Qemu-devel] x86 mxcsr register


From: andrzej zaborowski
Subject: [Qemu-devel] x86 mxcsr register
Date: Wed, 1 Oct 2008 02:23:17 +0200

Hi,
  seemingly the various MMX/SSE floating point instruction should keep
the fpu's state in the "mxcsr" register (for example rounding mode).
Currently they use env->sse_status for that, but there's also
env->mxcsr that appears to be unused except for ldmxcsr/stmxcsr.  I
don't know if I'm looking in the right places.  Maybe the idea was
that mxcsr should be synchronised to sse_status everytime mxcsr needs
to be used directly?

Cheers




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