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> Marcus Shawcroft wrote: > On 9 July 2015 at 16:03, Marcus Shawcroft <marcus.shawcroft@gmail.com> wrote: > > On 8 July 2015 at 16:05, Wilco Dijkstra <wdijkstr@arm.com> wrote: > >> This is an optimized memcpy for AArch64. Copies are split into 3 main cases: small copies > of up to > >> 16 bytes, medium copies of 17..96 bytes which are fully unrolled. Large copies of more than > 96 bytes > >> align the destination and use an unrolled loop processing 64 bytes per iteration. In order > to share > >> code with memmove, small and medium copies read all data before writing, allowing any kind > of > >> overlap. On a random copy test memcpy is 40.8% faster on A57 and 28.4% on A53. > >> > >> ChangeLog: > >> 2015-07-08 Wilco Dijkstra <wdijkstr@arm.com> > >> > >> * newlib/libc/machine/aarch64/memcpy.S (memcpy): > >> Rewrite of optimized memcpy. > >> > >> OK for commit? > > > > OK /Marcus > > Drop the unrelated white space changes in the boiler plate first please. > /Marcus Done, see attached. Wilco
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0001-Optimized-memcpy.txt
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