[Mesa-dev] [Bug 66806] [softpipe] glxgears floating point exception

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66806

--- Comment #2 from José Fonseca <jfonseca at vmware.com> ---
Indeed 
http://software.intel.com/en-us/articles/x87-and-sse-floating-point-assists-in-ia-32-flush-to-zero-ftz-and-denormals-are-zero-daz

suggests to mask certain exceptions together with the FTZ/DAZ bits:

  // UNDERFLOWS
  set_mxcsr_on(FTZ_BIT);
  set_mxcsr_off(UNDERFLOW_EXCEPTION_MASK);
  make_denormal();
  clear_flags();


  // DENORMALS
  set_mxcsr_off(DAZ_BIT);
  set_mxcsr_on(DENORMAL_EXCEPTION_MASK);
  make_denormal();
  clear_flags();

So we should probably do the same.

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