Open Source Bullet: MinkoChess 1.3

[IWB]

Thx Jim, that runs everywhere.

Just one question, I checked on an old Q6600 which doesnt support POPCNT/SSE4 and it runs there as well. Does it have some kind of autodetect for that feature or is it possible ybroken and not using POPCNT/SSE at all?

Besides that it works fine and again I propose to put it on your web page!

You right. It's not using popcount.
Minko needs SSE4 defined for popcount support. There is no auto-detect.

Relevant code in Minko is this >

Code: Select all

#if defined(SSE4)
inline int __attribute__((always_inline)) bit_count(const Bitboard b) {
    int ret;
    __asm__("popcnt %1, %%rcx" : "=c" (ret) : "r" (b));
    return ret;
}

Download again, same link for popcount-enabled build.

Jim.

The POPCNT Version still runs on a Q6600 without SSE42 support ...

thx
Ingo

[Jim Ablett]

The POPCNT Version still runs on a Q6600 without SSE42 support ...

That is really baffling. Can you check both builds to see if there is speed difference on Phenom.

Jim.

[IWB]

The POPCNT Version still runs on a Q6600 without SSE42 support ...

That is really baffling. Can you check both builds to see if there is speed difference on Phenom.

Jim.

I checked again and it runs on Q6600. Nonetheless the POPCNT version is slightly faster on a Phenom2

NO POP:


rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -

Engine: MinkoChess x64 JA (256 MB)
by Borko Boskovic

15/29 0:01 +0.04 1.Nf3 Nf6 2.e3 d5 3.d4 e6 4.Bd3 Bd6
5.O-O O-O 6.Nc3 Nc6 7.Nb5 Bd7 8.Nxd6 cxd6 (1.488.251) 1082

15/29 0:02 +0.19 1.e4 Nc6 2.Nc3 Nf6 3.Nf3 d5 4.exd5 Nxd5
5.Bb5 Nxc3 6.dxc3 Bf5 7.Nd4 Qd5
8.Nxf5 Qxf5 (2.197.840) 1065

16/30 0:06 +0.27 1.e4 e6 2.d4 d5 3.exd5 exd5 4.Nf3 Nf6
5.Bb5+ c6 6.Bd3 Bb4+ 7.c3 Bd6 8.O-O O-O
9.Ne5 Bxe5 (7.016.016) 1032

17/39 0:08 +0.24 1.e4 e6 2.d4 d5 3.exd5 exd5 4.Nf3 Nf6
5.Bb5+ c6 6.Bd3 Bb4+ 7.Bd2 Bxd2+
8.Nbxd2 O-O 9.O-O Qb6 10.Nb3 Re8 (8.340.592) 1036

18/39 0:14 +0.25 1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5
5.Nxe5 Nd7 6.O-O Nxe5 7.dxe5 Bc5
8.Qe2 O-O 9.Bxe4 dxe4 10.Qxe4 (15.201.791) 1031

19/39 0:18 +0.23 1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5
5.Nxe5 Nd7 6.O-O Nxe5 7.dxe5 Bc5
8.Qe2 O-O 9.Bxe4 dxe4 10.Qxe4 Re8 (18.592.436) 1025

20/39 0:27 +0.13 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4
5.Qe2 Qe7 6.d3 Nf6 7.Nc3 Nc6 8.Bg5 Qxe2+
9.Bxe2 Be7 10.Nb5 Nd5 11.c4 (27.956.421) 1011

21/43 0:38 +0.09 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4
5.Qe2 Qe7 6.d3 Nf6 7.Nc3 Nc6 8.Bg5 Be6
9.O-O-O O-O-O 10.Ne4 Re8 11.Bxf6 gxf6 (38.965.568) 1004

22/43 1:00 +0.28 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4
5.Nc3 Nxc3 6.dxc3 Be7 7.Bb5+ Nc6
8.O-O O-O 9.Re1 Bd7 10.Bf4 Re8
11.Bc4 g5 12.Be3 Bf5 (59.900.601) 992

best move: e2-e4 time: 1:04.062 min n/s: 991.552 nodes: 63.490.090

POP:


rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -

Engine: MinkoChess x64 POP (256 MB)
by Borko Boskovic

15/29 0:01 +0.04 1.Nf3 Nf6 2.e3 d5 3.d4 e6 4.Bd3 Bd6
5.O-O O-O 6.Nc3 Nc6 7.Nb5 Bd7 8.Nxd6 cxd6 (1.488.251) 1107

15/29 0:02 +0.19 1.e4 Nc6 2.Nc3 Nf6 3.Nf3 d5 4.exd5 Nxd5
5.Bb5 Nxc3 6.dxc3 Bf5 7.Nd4 Qd5
8.Nxf5 Qxf5 (2.197.840) 1098

16/30 0:06 +0.27 1.e4 e6 2.d4 d5 3.exd5 exd5 4.Nf3 Nf6
5.Bb5+ c6 6.Bd3 Bb4+ 7.c3 Bd6 8.O-O O-O
9.Ne5 Bxe5 (7.016.016) 1079

17/39 0:07 +0.24 1.e4 e6 2.d4 d5 3.exd5 exd5 4.Nf3 Nf6
5.Bb5+ c6 6.Bd3 Bb4+ 7.Bd2 Bxd2+
8.Nbxd2 O-O 9.O-O Qb6 10.Nb3 Re8 (8.340.592) 1082

18/39 0:14 +0.25 1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5
5.Nxe5 Nd7 6.O-O Nxe5 7.dxe5 Bc5
8.Qe2 O-O 9.Bxe4 dxe4 10.Qxe4 (15.201.791) 1066

19/39 0:17 +0.23 1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5
5.Nxe5 Nd7 6.O-O Nxe5 7.dxe5 Bc5
8.Qe2 O-O 9.Bxe4 dxe4 10.Qxe4 Re8 (18.592.436) 1062

20/39 0:26 +0.13 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4
5.Qe2 Qe7 6.d3 Nf6 7.Nc3 Nc6 8.Bg5 Qxe2+
9.Bxe2 Be7 10.Nb5 Nd5 11.c4 (27.956.421) 1049

21/43 0:37 +0.09 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4
5.Qe2 Qe7 6.d3 Nf6 7.Nc3 Nc6 8.Bg5 Be6
9.O-O-O O-O-O 10.Ne4 Re8 11.Bxf6 gxf6 (38.965.568) 1039

22/43 0:58 +0.28 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4
5.Nc3 Nxc3 6.dxc3 Be7 7.Bb5+ Nc6
8.O-O O-O 9.Re1 Bd7 10.Bf4 Re8
11.Bc4 g5 12.Be3 Bf5 (59.900.601) 1024

best move: e2-e4 time: 1:04.031 min n/s: 1.021.860 nodes: 65.399.047


3%, normalythis is about SSE42. Are you sure there is no autodetect?

I have no idea!

BYe
Ingo