> > From: Stephen Hemminger [mailto:[email protected]] > > Sent: Tuesday, 4 August 2026 17.52 > > > > On Tue, 4 Aug 2026 14:33:04 +0000 > > Morten Brørup <[email protected]> wrote: > > > > > + /* Common way for small copy size of 64-byte blocks. Unlikely, so > > constant size only */ > > > + if (__rte_constant(n) && (n & 63) == 0 && n <= > > RTE_MEMCPY_BLOCK_64_MAX) { > > > + void *ret = dst; > > > + > > > > Maybe just let compiler decide, it will generate vector instructions in > > most cases. > > > > if (__rte_constant(n)) > > return mempcpy(dst, src, n); > > Maybe in most, but not in all: > https://godbolt.org/z/KvdKqT5rY
With '-mavx' or '-mavx512f' it looks like it does for your sample code.
