t...@gmplib.org (Torbjörn Granlund) writes: > We might define these directly, at least for arm64, to CLZ and RBIT+CLZ, > respectively, instead of using gcc's builtin semi-defined variants?
Using inline asm instead has the drawback that it leaves a little less opportunity for the compiler to schedule this instructions optimally. No idea if that matters in practice. Since it seems we don't really need count_*_zeros to support zero input, is there any advantage in using inline asm? (Related, I wonder what the effect would be of redefining umul_ppmm as C expressions involving __uint128_t on compilers that support that). /Niels -- Niels Möller. PGP-encrypted email is preferred. Keyid 368C6677. Internet email is subject to wholesale government surveillance. _______________________________________________ gmp-bugs mailing list gmp-bugs@gmplib.org https://gmplib.org/mailman/listinfo/gmp-bugs
