AMD BMI2 question

[Leo]

I forgot if BMI2 works well with AMD CPUs or not. Can someone tell me? Thanks.

[MikeB]

I forgot if BMI2 works well with AMD CPUs or not. Can someone tell me? Thanks.

BMI2 is supported by AMDs Excavator architecture and newer. The simple solution is to run a bmi2 compile and then bench see if it's faster. If it does not run or it's slower, then you know. You can run bench and start stockfish all in one line - on macOS, it is "./stockfish bench >/dev/null". Even on Intel chips - it's only 5% faster on my machine. ymmv.

[Leo]

Thanks. Much appreciated.

[schack]

It works, but not well. Use 'modern' compiles.

[Leo]

It works, but not well. Use 'modern' compiles.

Thanks. I will.