Date: Tue, 30 Mar 1999 15:22:17 +0800 (JST)
From: Richi Plana <richip AT mozcom DOT com>
To: pgcc AT delorie DOT com
cc: Andrew DOT Tridgell AT anu DOT edu DOT au, Jon DOT Baxter AT anu DOT edu DOT au
Subject: PGCC and KnightCap
Message-ID: <Pine.LNX.4.04.9903301509530.3488-100000@jaguar.mozcom.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Reply-To: pgcc AT delorie DOT com

Hi,

There seems to be a problem with PGCC when used to compile the
chess-playing program KnightCap. When compiled with PGCC, KnightCap just
loops forever at line 267 of movement.c, with or without compiler
optimization flags. It's probably not a bug, but I really wouldn't know.

$ pgcc -v
Reading specs from /usr/lib/gcc-lib/i686-pc-linux-gnu/pgcc-2.91.60/specs
gcc version pgcc-2.91.60 19981201 (egcs-1.1.1 release)

KnightCap version: KnightCap-3.6.tar.gz

$(SRC)/movement.c:

        Square p1, p2;
        int s1, s2;
        int dir, i;
        uint64 mask;
...
        for (i=0;i<8;i++) {
                dir = NORTH_WEST;
                p1 = A1 + i*EAST;
                p2 = A1 + i*NORTH;

                mask = 0;
267:            for (s1=p1; s1>=p2; s1+=dir)
                        mask |= ((uint64)1<<s1);

                for (s1=p1;s1>=p2;s1+=dir)
                        for (s2=p1;s2>=p2;s2+=dir)
                                if (s1 != s2) {
                                        same_line_mask[s1][s2] = mask;
                                }
        }



L   L Richi Plana 8^)         ,-,-.     ,-,-.     ,-,-.     ,-,-.     ,-
LL LL Systems Administrator  / / \ \   / / \ \   / / \ \   / / \ \   / /
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