-ffast-math
Sets ‘-fno-math-errno’, ‘-funsafe-math-optimizations’, ‘-ffinite-math-only’,
‘-fno-rounding-math’, ‘-fno-signaling-nans’ and ‘-fcx-limited-range’.
This option causes the preprocessor macro __FAST_MATH__ to be defined.



Those seems to be floating point options. Probably not useful ...

one-input -> one-output is pretty clear and well-defined. The minute you reach one-input -> multiple possible outputs, you cross the line. But not before, IMHO. Note that this is a suggestion. NO one has adopted it as a rule or policy...
Is this correct, then?

1) If one-input-one-output function ...

one-input -> one-output is pretty clear and well-defined. The minute you reach one-input -> multiple possible outputs, you cross the line. But not before, IMHO. Note that this is a suggestion. NO one has adopted it as a rule or policy...
Is this correct, then?

1) If one-input-one-output function ...

Ben, I will give you another version:


inline int MemberCount(long long Bits)
{
int Count = 0;

while (Bits != 0)
{
++Count;
Bits &= (Bits - 1);
}

return Count;
}
// COPYRIGHT 2011 Bo Persson

With VS2010 64-bit edition, this generates exactly the same instructions as the Crafty hand ...

In Ivanhoe, file "low_depth.c", there is "#include "low_depth.c"". The file recursively includes itself. Why?

Is this just sloppy programming?

And, other Ivanhoe files do this.

I think they just outsmarted themselves. :-)

There is an include guard that makes the second inclusion different ...

Friedbert wrote:All I know: There is no copyright on chess games.
There has been a discussion some years ago about this issue.
I think GM Hübner was involved.

Right, the game score is considered a piece of fact, what actually happened. You can't copyright facts.

I recall I used some small program for my custom TSCP compiles, but I don't remember what since it was several years ago.

One of these maybe?


MinGW-w64 -- a 32/64-bit Build and Development Environment for Windows (CygWin) with minimal toolchain. No GUI IDE. Open-source. Contains GCC
http ...

I have read of software companies accused of stealing or lawfully obtaining disassembled code, hiring a group of new programmers (new to that company), who have never seen the code in question, and giving them the job of coding up functions that meet certain criteria. Then, using the best of what ...

Which is most efficient depends a lot on how large a state your program keeps. You can either use copy-and-discard, or make-unmake. The amount of memory traffic produced by each method, determines what will be the fastest.

A make-unmake might keep the data in the same cache lines for a longer time ...

The Ivanhoe RAR file that I downloaded from http://www.chesslogik.com/downloads/IvanHoe_999957a.rar has engines under each of three folders: default , popcnt , and prefetch .

Which one should I use? What is the difference?

Thanks

The default should work on most hardware. The others might be ...