On Dec 6, 2017 8:58 AM, "Sebastian Huber" < sebastian.hu...@embedded-brains.de> wrote:
On 06/12/17 14:38, Joel Sherrill wrote: > I spoke with someone yesterday at the FSW who pointed out that Linux has > an assembly version of memcpy() for SPARC. Obviously this code is pure GPL > so we can't use it. > Is this assembly version faster, better, whatever? The person said it was faster especially on unaligned data. Supposed to present this week so maybe will have more details. He showed me the code and it looked more or less like the optimized ARM version recently added to newlib. Set things up for sequences of ldd/std. Of course, the key to all these optimized version is to get to a tight loop moving as much data per iteration with some balance between register pressure and cache size. Just hoping we could find optimized versions from other sources and merge it to newlib. Otherwise, it is tedious work. -- Sebastian Huber, embedded brains GmbH Address : Dornier <https://maps.google.com/?q=ess+:+Dornier&entry=gmail&source=g>str. 4, D-82178 Puchheim, Germany Phone : +49 89 189 47 41-16 Fax : +49 89 189 47 41-09 E-Mail : sebastian.hu...@embedded-brains.de PGP : Public key available on request. Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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