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X shl 1 normaly the fastest ... Em 19.01.2014 17:47, Ched escreveu: > Dear Freepascalers, > > The multiplication in floating arthmetic units is usualy know as being slower than the addition. So, have > I interest to code X+X, 2*X or X*2 when using reals (mainly double and extended) ?And with integers ? > > Can the compiler optimise this operation choosing the fastest one - probably depending on the > architecture x86, arm, aso. > > Cheers, Raoul > _______________________________________________ > fpc-pascal maillist - fpc-pascal@lists.freepascal.org > http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal [1] Links: ------ [1] http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
_______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
