The state of glibc libm

[Jeff Law]

On 03/14/2012 08:30 AM, Vincent Lefevre wrote:
>
>> (b) Where functions do make attempts at being correctly rounded
>> (especially the IBM Accurate Mathematical Library functions), they tend to
>> be sufficiently slow that the slowness attracts bug reports.  Again, this
>> would likely be addressed by new implementations that use careful error
>> bounds and information about worst cases to reduce the cost of being
>> correctly rounding.
>
> I'm not sure that the complaints are about worst cases. More probably
> software implementation vs hardware implementation in the average
> case. But a new software implementation (better in average) could
> help.
The complaints I typically see are about worst case performance.  I 
occasionally see requests for better performance with the potential loss 
of accuracy.

jeff