[PATCH 2/6] Remove slow paths from sin/cos
Joseph Myers
joseph@codesourcery.com
Sat Mar 10 00:52:00 GMT 2018
On Fri, 9 Mar 2018, Steve Ellcey wrote:
> And yet we have tests for large numbers in auto-libm-test-out-sin
> and auto-libm-test-out-cos. Â I was testing a different vector sin/cos
Yes. A floating-point number represents a particular real number, not an
interval, so all the usual accuracy goals (of results within a few ulps of
the correct answer) apply for large inputs (but performance is not a
concern for those inputs). Only for IBM long double is this relaxed, to
treat values not representable in 106 mantissa bits as if they do
represent intervals.
--
Joseph S. Myers
joseph@codesourcery.com
More information about the Libc-alpha
mailing list