On 6/7/22 10:16 PM, Michael Meissner wrote:
> Otherwise it is like the mess with -mpower8-fusion, where going from power8 to
> power9 we have to clear the fusion flag. If store vector pair is a postive
> flag, then it isn't set in power10 flags, but it might be set in next cpu
> flags. But if it
On Tue, 2022-06-07 at 23:16 -0400, Michael Meissner wrote:
> On Tue, Jun 07, 2022 at 07:59:34PM -0500, Peter Bergner wrote:
> > On 6/7/22 4:24 PM, Segher Boessenkool wrote:
> > > On Tue, Jun 07, 2022 at 04:17:04PM -0500, Peter Bergner wrote:
> > > > I think I mentioned this offline, but I'd prefer
On Tue, Jun 07, 2022 at 07:59:34PM -0500, Peter Bergner wrote:
> On 6/7/22 4:24 PM, Segher Boessenkool wrote:
> > On Tue, Jun 07, 2022 at 04:17:04PM -0500, Peter Bergner wrote:
> >> I think I mentioned this offline, but I'd prefer a negative target flag,
> >> something like TARGET_NO_STORE_VECTOR_P
On 6/7/22 4:24 PM, Segher Boessenkool wrote:
> On Tue, Jun 07, 2022 at 04:17:04PM -0500, Peter Bergner wrote:
>> I think I mentioned this offline, but I'd prefer a negative target flag,
>> something like TARGET_NO_STORE_VECTOR_PAIR that defaults to off, meaning we'd
>> generate stxvp by default.
>
On Tue, Jun 07, 2022 at 04:17:04PM -0500, Peter Bergner wrote:
> On 6/6/22 7:55 PM, Michael Meissner wrote:
> > gcc/
> [snip]
> > * config/rs6000/rs6000.opt (-mstore-vector-pair): New option.
> [snip]
> > diff --git a/gcc/config/rs6000/rs6000.opt b/gcc/config/rs6000/rs6000.opt
> > index 4931d78
On Tue, Jun 07, 2022 at 04:17:04PM -0500, Peter Bergner wrote:
> I think I mentioned this offline, but I'd prefer a negative target flag,
> something like TARGET_NO_STORE_VECTOR_PAIR that defaults to off, meaning we'd
> generate stxvp by default.
NAK. All negatives should be -mno-xxx with -mxxx t
On 6/6/22 7:55 PM, Michael Meissner wrote:
> gcc/
[snip]
> * config/rs6000/rs6000.opt (-mstore-vector-pair): New option.
[snip]
> diff --git a/gcc/config/rs6000/rs6000.opt b/gcc/config/rs6000/rs6000.opt
> index 4931d781c4e..79ceec6e6a5 100644
> --- a/gcc/config/rs6000/rs6000.opt
> +++ b/gcc/c
On Mon, 2022-06-06 at 20:55 -0400, Michael Meissner wrote:
> [PATCH 1/3] Disable generating store vector pair.
>
> Testing has revealed that the power10 has some slowdowns if the store
> vector pair instruction is generated in some cases. This patch disables
> generating the store vector pair ins
