Re: [RFC] Aarch64: Replace nested FP min/max with conditionals for TX2

2020-09-12 Thread Anton Youdkevitch
On Fri, Sep 11, 2020 at 8:43 AM Richard Biener wrote: > On Fri, Sep 11, 2020 at 8:27 AM Anton Youdkevitch > wrote: > > > > Richard, > > > > On Thu, Sep 10, 2020 at 12:03 PM Richard Biener < > richard.guent...@gmail.com> wrote: > >> > >> On Wed, Sep 9, 2020 at 5:51 PM Anton Youdkevitch > >> wrot

Re: [RFC] Aarch64: Replace nested FP min/max with conditionals for TX2

2020-09-10 Thread Richard Biener via Gcc-patches
On Fri, Sep 11, 2020 at 8:27 AM Anton Youdkevitch wrote: > > Richard, > > On Thu, Sep 10, 2020 at 12:03 PM Richard Biener > wrote: >> >> On Wed, Sep 9, 2020 at 5:51 PM Anton Youdkevitch >> wrote: >> > >> > ThunderxT2 chip has an odd property that nested scalar FP min and max are >> > slower tha

Re: [RFC] Aarch64: Replace nested FP min/max with conditionals for TX2

2020-09-10 Thread Richard Biener via Gcc-patches
On Wed, Sep 9, 2020 at 5:51 PM Anton Youdkevitch wrote: > > ThunderxT2 chip has an odd property that nested scalar FP min and max are > slower than logically the same sequence of compares and branches. Always for any input data? > Here is the patch where I'm trying to implement that transformati