These patches implement support for potential future PowerPC cpus. At this
time, features enabled with -mcpu=future may or may not be in actual PowerPCs
that will be delivered in the future.
This patch adds support for the -mcpu=future and -mtune=future options.
If you use -mcpu=future, the macro __ARCH_PWR_FUTURE__ is defined, and the
assembler .machine directive "future" is used. Future patches in this
series will add support for new instructions that may be present in future
PowerPC processors.
At present, we do not have any specific differences in terms of cpu tuning for
future machines, so we make -mtune=future act the same as -mtune=power10. The
costs are also cloned from the power10. It is anticipated that we may change
the tuning characteristics for -mtune=future at a later time.
The patches have been tested on the following platforms. I added the patches
for PR target/107299 that I submitted on November 2nd before doing the builds so
that GCC would build on systems using IEEE 128-bit long double.
* https://gcc.gnu.org/pipermail/gcc-patches/2022-November/604834.html
There were no regressions with doing bootstrap builds and running the regression
tests:
1) Power10 LE using --with-cpu=power10 --with-long-double-format=ieee;
2) Power10 LE using --with-cpu=power10 --with-long-double-format=ibm;
3) Power9 LE using --with-cpu=power9 --with-long-double-format=ibm; and
4) Power8 BE using --with-cpu=power8 (both 32-bit & 64-bit tested).
Can I check this patch into the GCC 13 master branch?
2023-02-02 Michael Meissner <meissner@linux.ibm.com>
git://gcc.gnu.org / gcc.git / commit