Hi Linaro Toochain Group,

I have few questions on glibc+libm w.r.t aarch64.

If possible, please provide some insight, otherwise kindly redirect me to the concerned person/forum.

1.It seems from the community patches that ARM/Linaro is optimizing glibc functions such as memcpy/memmove, string for aarch64.

However, looks like some of these (e.g. memcpy/memmov) patches are still not merged in glibc. Any comment on their availability in glibc?

e.g. https://www.sourceware.org/ml/libc-alpha/2015-12/msg00341.html

2. On the same note, is there any plan for optimizing/tuning libm functions (e.g. trigonometric) for aarch64?

I could find any matching patches on review board. Please correct me if I am wrong.

3. Looks like ARM have released an independent version of libm for certain trigonometric functions.

https://github.com/ARM-software/optimized-routines.

Any plan of these optimization going in glibc's libm? Any comment on its performance improvement over GNU libm ?

   

Thanks in advance for your time.