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/**
Copyright (c) Scott Gasch
Module Name:
testbitboard.c
Abstract:
Unit test for the bitboard code.
Author:
Scott Gasch ([email protected]) 19 Oct 2004
Revision History:
**/
#ifdef TEST
#include "chess.h"
void TestBitboards(void)
/**
Routine description:
Sanity check bitboard code and benchmark the different ways to
twiddle bits.
Parameters:
void
Return value:
void
**/
{
COOR c;
ULONG b;
BITBOARD bb;
BITBOARD bbSpeed[1000];
ULONG u, v, w, z;
UINT64 u64;
Trace("Testing bitboard operations...\n");
//
// Make a table of 1000 random bitboards
//
for (u = 0;
u < 1000;
u++)
{
bbSpeed[u] = 0;
w = rand() % 24;
for (v = 0; v < w; v++)
{
z = RANDOM_COOR;
ASSERT(SLOWCOOR_TO_BB(z) == COOR_TO_BB(z));
bb = COOR_TO_BB(z);
bbSpeed[u] |= bb;
}
}
#if 1
//
// Various benchmaring code.
//
u64 = SystemReadTimeStampCounter();
for (u = 0; u < 1000000; u++)
{
b = u % 64;
bb = SLOWCOOR_TO_BB(b);
}
printf(" SLOWCOOR_TO_BB: %" COMPILER_LONGLONG_UNSIGNED_FORMAT
" cycles/op\n",
(SystemReadTimeStampCounter() - u64) / 1000000);
u64 = SystemReadTimeStampCounter();
for (u = 0; u < 1000000; u++)
{
b = u % 64;
bb = COOR_TO_BB(b);
}
printf(" COOR_TO_BB: %" COMPILER_LONGLONG_UNSIGNED_FORMAT
" cycles/op\n",
(SystemReadTimeStampCounter() - u64) / 1000000);
u64 = SystemReadTimeStampCounter();
for (v = 1; v < 1000; v++)
{
for (u = 0; u < 1000; u++)
{
b = SlowCountBits(bbSpeed[u]);
}
}
printf(" SlowCountBits: %" COMPILER_LONGLONG_UNSIGNED_FORMAT
" cycles/op\n",
(SystemReadTimeStampCounter() - u64) / (1000 * 1000));
u64 = SystemReadTimeStampCounter();
for (v = 0; v < 1000; v++)
{
for (u = 0; u < 1000; u++)
{
b = CountBits(bbSpeed[u]);
}
}
printf(" CountBits: %" COMPILER_LONGLONG_UNSIGNED_FORMAT
" cycles/op\n",
(SystemReadTimeStampCounter() - u64) / (1000 * 1000));
u64 = SystemReadTimeStampCounter();
for (v = 0; v < 1000; v++)
{
for (u = 0; u < 1000; u++)
{
b = SlowLastBit(bbSpeed[u]);
}
}
printf(" SlowLastBit: %" COMPILER_LONGLONG_UNSIGNED_FORMAT
" cycles/op\n",
(SystemReadTimeStampCounter() - u64) / (1000 * 1000));
u64 = SystemReadTimeStampCounter();
for (v = 0; v < 1000; v++)
{
for (u = 0; u < 1000; u++)
{
b = LastBit(bbSpeed[u]);
}
}
printf(" LastBit: %" COMPILER_LONGLONG_UNSIGNED_FORMAT
" cycles/op\n",
(SystemReadTimeStampCounter() - u64) / (1000 * 1000));
u64 = SystemReadTimeStampCounter();
for (v = 0; v < 1000; v++)
{
for (u = 0; u < 1000; u++)
{
b = SlowFirstBit(bbSpeed[u]);
}
}
printf(" SlowFirstBit: %" COMPILER_LONGLONG_UNSIGNED_FORMAT
" cycles/op\n",
(SystemReadTimeStampCounter() - u64) / (1000 * 1000));
u64 = SystemReadTimeStampCounter();
for (v = 0; v < 1000; v++)
{
for (u = 0; u < 1000; u++)
{
b = DeBruijnFirstBit(bbSpeed[u]);
}
}
printf(" DeBruijnFirstBit: %" COMPILER_LONGLONG_UNSIGNED_FORMAT
" cycles/op\n",
(SystemReadTimeStampCounter() - u64) / (1000 * 1000));
u64 = SystemReadTimeStampCounter();
for (v = 0; v < 1000; v++)
{
for (u = 0; u < 1000; u++)
{
b = FirstBit(bbSpeed[u]);
}
}
printf(" FirstBit: %" COMPILER_LONGLONG_UNSIGNED_FORMAT
" cycles/op\n",
(SystemReadTimeStampCounter() - u64) / (1000 * 1000));
#endif
FOREACH_SQUARE(c)
{
if (!IS_ON_BOARD(c)) continue;
if (BIT_NUMBER_TO_COOR(COOR_TO_BIT_NUMBER(c)) != c)
{
UtilPanic(TESTCASE_FAILURE,
NULL,
"bit number to coor / coor to bit number",
NULL,
NULL,
__FILE__, __LINE__);
}
if (SLOW_BIT_NUMBER_TO_COOR(COOR_TO_BIT_NUMBER(c)) != c)
{
UtilPanic(TESTCASE_FAILURE,
NULL,
"slow bit number to coor / coor to bit number",
NULL,
NULL,
__FILE__, __LINE__);
}
if (BIT_NUMBER_TO_COOR(COOR_TO_BIT_NUMBER(c)) !=
SLOW_BIT_NUMBER_TO_COOR(COOR_TO_BIT_NUMBER(c)))
{
UtilPanic(TESTCASE_FAILURE,
NULL,
"bit number to coor / slow bit number to coor",
NULL,
NULL,
__FILE__, __LINE__);
}
}
for (b = 1;
b < 64;
b++)
{
if (COOR_TO_BIT_NUMBER(BIT_NUMBER_TO_COOR(b)) != (b))
{
UtilPanic(TESTCASE_FAILURE,
NULL,
"coor to bit number / bit number to coor",
NULL,
NULL,
__FILE__, __LINE__);
}
}
bb = COOR_TO_BB(A4);
bb |= COOR_TO_BB(A6);
bb |= COOR_TO_BB(A8);
bb |= COOR_TO_BB(B6);
bb |= COOR_TO_BB(H2);
if (CountBits(bb) != 5)
{
UtilPanic(TESTCASE_FAILURE,
NULL, "CountBits", NULL, NULL,
__FILE__, __LINE__);
}
bb &= BBFILE[A];
if (CountBits(bb) != 3)
{
UtilPanic(TESTCASE_FAILURE,
NULL, "CountBits", NULL, NULL,
__FILE__, __LINE__);
}
b = 0;
while(IS_ON_BOARD(c = CoorFromBitBoardRank8ToRank1(&bb)))
{
b++;
if ((c != A4) && (c != A6) && (c != A8))
{
UtilPanic(TESTCASE_FAILURE,
NULL, "CoorFromBitBoardRank8ToRank1", NULL, NULL,
__FILE__, __LINE__);
}
}
if (b != 3)
{
UtilPanic(TESTCASE_FAILURE,
NULL, "CoorFromBitBoardRank8ToRank1", NULL, NULL,
__FILE__, __LINE__);
}
bb = SLOWCOOR_TO_BB(A4) | SLOWCOOR_TO_BB(H2);
bb |= SLOWCOOR_TO_BB(D4) | SLOWCOOR_TO_BB(F6) | SLOWCOOR_TO_BB(F4);
if (CountBits(bb) != 5)
{
UtilPanic(TESTCASE_FAILURE,
NULL, "CountBits", NULL, NULL,
__FILE__, __LINE__);
}
bb &= BBRANK[4];
if (CountBits(bb) != 3)
{
UtilPanic(TESTCASE_FAILURE,
NULL, "CountBits", NULL, NULL,
__FILE__, __LINE__);
}
b = 0;
while(IS_ON_BOARD(c = CoorFromBitBoardRank1ToRank8(&bb)))
{
b++;
if ((c != A4) && (c != D4) && (c != F4))
{
UtilPanic(TESTCASE_FAILURE,
NULL, "CoorFromBitBoardRank1ToRank8", NULL, NULL,
__FILE__, __LINE__);
}
}
if (b != 3)
{
UtilPanic(TESTCASE_FAILURE,
NULL, "CoorFromBitBoardRank1ToRank8", NULL, NULL,
__FILE__, __LINE__);
}
}
#endif
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