Marco Bodrato <bodr...@mail.dm.unipi.it> writes: > Using masks does not always give the fastest code. I tried the > following variation on Niels' code, and, on my laptop with "g++-10 -O2 > -mtune=icelake-client -march=icelake-client", the resulting code is > comparable (faster?) with the current asm.
Maybe we should have some macrology for that? Or do all relevant processors and compilers support efficient cmov these days? I'm sticking to masking expressions for now. Worries about side-channel leakage of cmov isn't so relevant for these particular functions, since the use of MPN_INCR_U is a data dependent loop anyway. Regards, /Niels -- Niels Möller. PGP-encrypted email is preferred. Keyid 368C6677. Internet email is subject to wholesale government surveillance. _______________________________________________ gmp-devel mailing list gmp-devel@gmplib.org https://gmplib.org/mailman/listinfo/gmp-devel
