[PATCH v2 2/6] [powerpc] No need to enter "Ignore Exceptions Mode"

Paul E Murphy murphyp@linux.ibm.com
Mon Sep 23 15:16:00 GMT 2019



On 9/19/19 1:46 PM, Paul A. Clarke wrote:
> From: "Paul A. Clarke" <pc@us.ibm.com>
> 
> Since at least POWER8, there is no performance advantage to entering
> "Ignore Exceptions Mode", and doing so conditionally requires the
> conditional logic as well as a system call.  Make it a no-op.
> 
> 2019-09-19  Paul A. Clarke  <pc@us.ibm.com>
> 
> 	* sysdeps/powerpc/fpu/fenv_libc.h:
> 	(__ENTER_NON_STOP): New.
> 	(__EXIT_NON_STOP): New.
> 	(__TEST_AND_ENTER_NON_STOP): Use __ENTER_NON_STOP.
> 	(__TEST_AND_EXIT_NON_STOP): Use __EXIT_NON_STOP.
> ---
> v2: This is a new patch in the series.
> 
>   sysdeps/powerpc/fpu/fenv_libc.h | 12 ++++++++++--
>   1 file changed, 10 insertions(+), 2 deletions(-)
> 

OK.

Reviewed-By: Paul E Murphy <murphyp@linux.ibm.com>



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