@paul @adam_chal well there are different implementations of tan too. Some have a slow path included and some don't. Even different versions of glibc are different. see https://sourceware.org/bugzilla/show_bug.cgi?id=15267 for talking about the slow path.
I am not 100% sure FMA is the only difference here though. But it does change the ULP so does the slow path in some cases.
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pinskia (pinskia@hachyderm.io)'s status on Monday, 18-Nov-2024 07:34:03 JSTpinskia