[PATCH 0/4] math: Fix inaccurate sin/cos/tan for large arguments (BZ 34376)

[Adhemerval Zanella Netto]

On 17/07/26 08:18, Stefan Kanthak wrote:
> "Adhemerval Zanella" <adhemerval.zanella@linaro.org> wrote:
> 
>> The fix restores the fdlibm e_rem_pio2.c [...]
> 
> Don't you have (or want a better) alternative?
> How big is this code, and how fast^Wslow does it run?

Not right now where we at near the hard freeze for 2.44 release.

> 
> JFTR: fdlibm was written for 32-bit machines, it doesn't use 64-bit integer
>       arithmetic supported since 20 years on mainstream processors, or via
>       (hopefully properly optimising) compilers on 32-bit processors since
>       the last millenium.
> 
> If it has more than about 60 instructions on x86-64 or about 140 instructions
> on x86/x87: DUMP IT!
> 
> Take a look at <https://skanthak.hier-im-netz.de/ieee-754.html#payne-hanek>
> for comparison.
This is essentially a new implementation and this is material for
next release.