RFR(L): 8077838: Recent developments for ppc. (original) (raw)

Lindenmaier, Goetz goetz.lindenmaier at sap.com
Wed Apr 22 09:34:49 UTC 2015

Hi,

this change contains recent changes in the ppc directory mostly made by SAP. It's a ppc-only change. http://cr.openjdk.java.net/~goetz/webrevs/8077838-ppc/webrev.01/

Recognition of Power 8 processors (by Tiago Sturmer Daitx).
Support for more new Power 8 instructions.
Support for transactional memory. This is implemented but not yet tested thoroughly due to limitiations of the OS support. Not enabled.
java.lang.math.*Exact intrinsics
Some C2 optimizations and fixes:
- Handling of flag registers. Some instructions would lead to uncompilable methods due to not allocatable register patterns.
- Free some integer registers to use them for allocation. Handle compressed oops base as constant.
- Unscaled class compression.
Type profiling fixes.

Please review this change.

Best regards, Goetz.