[aarch64-port-dev ] Possible aarch64 bug with RoundFPResults

[White, Derek]

Hi porters,

I'm looking over "RFR: 8145665: Make UseSSE an x86 specific option and cleanup its usage in shared code", and saw an odd thing:

AARCH64 defines RoundFPResults=true, like x86 does, not like PPC, arm, s390, etc.

This flag controls (along with UseSSE) cases where CPUs need to explicitly round to 64-bit FP. Which we should never have to do on AARCH64?

Is this a real issue or am I imagining it?

This is becoming more urgent because  JDK-8145665 is removing UseSSE from non-x86 code, which would result in more use of rounding.

Thanks,


  *   Derek