Hi,
>> Maybe I am crazy, or the labels here are wrong, but that looks like the
>> error is three times as *big* after the patch. I.e. it worsened instead
>> of improving.
This error is actually 1ULP, so just a rounding error. Can't expect any better
than that!
> with input : = 9.99999880790710449218750000000000000000000000000000e-01
> cosh: before: = 2.04800000000000000000000000000000000000000000000000e+03
> cosh: after : = 2.04800024414062500000000000000000000000000000000000e+03
> cosh: mpfr : = 2.04800006103515897848424084406334262726138617589463e+03
> error before: = 6.10351589784842408440633426272613861758946325324235e-05
> error after : = 1.83105466021515759155936657372738613824105367467577e-04
It may be less confusing to print relative error or ULP error...
Wilco
