Author: Dave Gomboc
Date: 10:24:10 04/08/99
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On April 08, 1999 at 12:17:38, José de Jesús García Ruvalcaba wrote: >On April 08, 1999 at 00:50:38, Dave Gomboc wrote: > >>On April 06, 1999 at 23:24:09, Peter McKenzie wrote: >> >>>On April 06, 1999 at 15:35:54, Larry Griffiths wrote: >>> >>>>On April 06, 1999 at 14:58:42, vitor wrote: >>>> >>>>>i think i get the idea of bitboards but i dont know any C or C++ yet, i only >>>>>know java. so is it possible to implement bitboards in java and if so, how would >>>>>i do move generation with it? >>>> >>>>Vitor, >>>> >>>>I believe you can do bitboards in java. JBuilder has a class for >>>>Big Integers with XOR, AND, and OR methods. I have not used them >>>>so I do not know if these methods would be efficient. >>>> >>>>Larry. >>> >>>A long in java is a 64 bit signed integer, an unsigned long is a 64 bit unsigned >>>integer. You can play with these using the normal C style bitwise operators. >>> >>>Peter >> >>Are there some Java compilers to native code that I don't know about? My >>understanding is that the performance of JIT compilers on cpu-intensive code is >>approximately 40x slower than C++. (Does that figure sound realistic?) >> >>Dave Gomboc > >What is a JIT compiler? >I know there are java compilers for Solaris. >It is imposible for us to know if there are Java compilers to native code you do >not know about, as we are not aware of which ones you know about (: JIT = just in time The java "compiler" that comes with Solaris 2.6 compiles into bytecode, not native code. It is then converted at runtime (just in time!) to native code... a bankrupt strategy for high-performance software. I am not aware of any native code compilers for Java. Any pointers would be helpful, especially stuff that is built into the OS or is free. ;-) Dave Gomboc
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