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Re: fwd from Jim Demmel: More on repeatability



On 08/18/2011 12:04 PM, Vincent Lefevre wrote:

The main problem can be the performance on some functions, e.g. for
sin/cos/tan on large arguments. One solution would be to return [-1,1]
for sin and cos when the argument is large enough.

This wouldn't be an optimal rounding if the argument is [realmax,realmax].