Crystal for Android

Archimedes · Post by **Archimedes** » 14/01/2021, 18:55

Crystal 3.1:
https://app.box.com/s/dv0u7su28xej5ru65sob3h2sjn5l639u

Archimedes · Post by **Archimedes** » 15/01/2021, 11:03

Added a build for armeabi-v7a devices with neon support. Engine still crashes on some positions.

MichaelM · Post by **MichaelM** » 15/01/2021, 11:51

Archimedes wrote:Added a build for armeabi-v7a devices with neon support. Engine still crashes on some positions.

Good job!

Installed all three versions in Droidfish. Neon version about two times faster than arm7 and hardly slower than arm8. And best of all: Downloaded and stored only about 2 MByte instead of 60 MByte!

The Rising Star · Post by **The Rising Star** » 16/01/2021, 9:46

Archimedes wrote:Crystal 3.1:
https://app.box.com/s/dv0u7su28xej5ru65sob3h2sjn5l639u

Engine termination problem in many positions.

Archimedes · Post by **Archimedes** » 16/01/2021, 10:59

Yes, it is, but i can tell you for sure, that it has nothing to do, with the way, it is compiled. I've already checked that. Older versions with different compiler environment have the same problem, as you can see in this thread.

Same thing with SugaR AI ICCF, it crashes on some (and probably on a huge amount of) positions, where the normal version SugaR AI doesn't crashes. And i'm using absolute identical compiler settings when i did the compile.

The Rising Star · Post by **The Rising Star** » 16/01/2021, 11:15

Archimedes wrote:Yes, it is, but i can tell you for sure, that it has nothing to do, with the way, it is compiled. I've already checked that. Older versions with different compiler environment have the same problem, as you can see in this thread.

Same thing with SugaR AI ICCF, it crashes on some (and probably on a huge amount of) positions, where the normal version SugaR AI doesn't crashes. And i'm using absolute identical compiler settings when i did the compile.

Hmm,but crystal is a very good engine.
I wanted to use but I can't just bcoz of its crashing problem.

SwiftSnips · Post by **SwiftSnips** » 16/01/2021, 21:58

The Rising Star wrote:
Archimedes wrote:Yes, it is, but i can tell you for sure, that it has nothing to do, with the way, it is compiled. I've already checked that. Older versions with different compiler environment have the same problem, as you can see in this thread.

Same thing with SugaR AI ICCF, it crashes on some (and probably on a huge amount of) positions, where the normal version SugaR AI doesn't crashes. And i'm using absolute identical compiler settings when i did the compile.
Hmm,but crystal is a very good engine.
I wanted to use but I can't just bcoz of its crashing problem.

You are welcome to try this one I made, Ive had no issues with crashing on this specific one.

https://www.dropbox.com/s/9vbxqui2xfwyjln/Crystal_210115-armv8.zip?dl=0

Archimedes · Post by **Archimedes** » 16/01/2021, 23:29

Looks good so far. Seems, you are using the present makefile for compiling. I only made tests with the integrated clang compiler in Android NDK.

MichaelM · Post by **MichaelM** » 16/01/2021, 23:53

Good crash-test position for Crystal:

Archimedes · Post by **Archimedes** » 17/01/2021, 1:54

Finally, i found the missing piece of the puzzle. Hopefully. :-D

I was not exact, when i was writing, it has nothing to do with the way, the chess engine is compiled. What i'm meaning is, it has nothing to do with target independent compiler settings (e. g. -O3, -flto and so on).

The version from SwiftSnips, which works for me, brought me to an idea. And finally, i found the reason for the crashes. There should be used the compiler definition -DUSE_PTHREADS (which is a source dependent compiler definition). Still now, i have no crashes with it.

I've uploaded the package again. Need to be tested, for sure.

The Rising Star · Post by **The Rising Star** » 17/01/2021, 5:53

SwiftSnips wrote:
The Rising Star wrote:
Archimedes wrote:Yes, it is, but i can tell you for sure, that it has nothing to do, with the way, it is compiled. I've already checked that. Older versions with different compiler environment have the same problem, as you can see in this thread.

Same thing with SugaR AI ICCF, it crashes on some (and probably on a huge amount of) positions, where the normal version SugaR AI doesn't crashes. And i'm using absolute identical compiler settings when i did the compile.
Hmm,but crystal is a very good engine.
I wanted to use but I can't just bcoz of its crashing problem.
You are welcome to try this one I made, Ive had no issues with crashing on this specific one.

https://www.dropbox.com/s/9vbxqui2xfwyjln/Crystal_210115-armv8.zip?dl=0

Thanks.
It is working fine for me.
No any crashing problem till now.

Skynet · Post by **Skynet** » 20/01/2021, 23:22

Crystal 180121 "Merge branch 'crystal' of github.com:jhellis3/Stockfish into crystal " https://github.com/MichaelB7/Stockfish/commit/2a42b55162e40852a52e5a19fddb7d70ab028020
Compiled with flag -DUSE_PTHREADS, thanks to Archimedes for the trick!

Engine without embedded network, no crashes so far!

Arm7-Arm8 https://pixeldrain.com/l/hxmHcGqZ#item=0

Archimedes · Post by **Archimedes** » 05/05/2021, 10:02

Crystal 3.1-dev-210503:
https://app.box.com/s/m4pfrv4m7u30a6von9taccts79tz1x85

Archimedes · Post by **Archimedes** » 21/06/2021, 14:03

Crystal 3.1-dev-210616:
https://app.box.com/s/uhr2n19o16pafhnxr0ngw5lav47lzntm

Skynet · Post by **Skynet** » 23/06/2021, 18:26

Crystal 3.2 https://github.com/jhellis3/Stockfish/commit/ff2a46457d7cd1b9b2e8d3134c61ae4b1cd9f2c8

arm7-arm8 https://pixeldrain.com/l/HkuEje1d#item=1

Outskirts CheSS ForuM

Outskirts CheSS ForuM