This patch enables generating load and store vector pair instructions when doing certain memory copy operations when -mcpu=future is used. In doing tests on power10, it was determined that using these instructions were problematical in a few cases, so we disabled generating them by default. This patch re-enabled generating these instructions if -mcpu=future is used.
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). Note, I will be on vacation from Tuesday February 7th through Tuesday February 14th. Can I check this patch into the GCC 13 master branch? 2023-02-03 Michael Meissner <meiss...@linux.ibm.com> gcc/ * config/rs6000/rs6000-cpus.def (ISA_FUTURE_MASKS): Add -mblock-ops-vector-pair. (POWERPC_MASKS): Likewise. --- gcc/config/rs6000/rs6000-cpus.def | 2 ++ 1 file changed, 2 insertions(+) diff --git a/gcc/config/rs6000/rs6000-cpus.def b/gcc/config/rs6000/rs6000-cpus.def index deb4ea1c980..b9a4d9ad76e 100644 --- a/gcc/config/rs6000/rs6000-cpus.def +++ b/gcc/config/rs6000/rs6000-cpus.def @@ -88,6 +88,7 @@ /* Flags for a potential future processor that may or may not be delivered. */ #define ISA_FUTURE_MASKS (ISA_3_1_MASKS_SERVER \ + | OPTION_MASK_BLOCK_OPS_VECTOR_PAIR \ | OPTION_MASK_FUTURE) /* Flags that need to be turned off if -mno-power9-vector. */ @@ -125,6 +126,7 @@ /* Mask of all options to set the default isa flags based on -mcpu=<xxx>. */ #define POWERPC_MASKS (OPTION_MASK_ALTIVEC \ + | OPTION_MASK_BLOCK_OPS_VECTOR_PAIR \ | OPTION_MASK_CMPB \ | OPTION_MASK_CRYPTO \ | OPTION_MASK_DFP \ -- 2.39.1 -- Michael Meissner, IBM PO Box 98, Ayer, Massachusetts, USA, 01432 email: meiss...@linux.ibm.com