Re: [RFC Linux patch] powerpc: add documentation for HWCAPs

2022-05-23 Thread Paul E Murphy via Gcc
On 5/20/22 7:11 PM, Nicholas Piggin wrote: Excerpts from Paul E Murphy's message of May 21, 2022 12:21 am: On 5/20/22 12:15 AM, Nicholas Piggin via Gcc wrote: +PPC_FEATURE2_TAR +VSX facility is available. Was manipulating the tar spr was once a privileged instruction, is this a hint

Re: [RFC Linux patch] powerpc: add documentation for HWCAPs

2022-05-20 Thread Nicholas Piggin via Gcc
Excerpts from Paul E Murphy's message of May 21, 2022 12:21 am: > > > On 5/20/22 12:15 AM, Nicholas Piggin via Gcc wrote: >> This takes the arm64 file and adjusts it for powerpc. Feature >> descriptions are vaguely handwaved by me. >> --- >> >> Anybody care to expand on or correct the meaning of

Re: [RFC Linux patch] powerpc: add documentation for HWCAPs

2022-05-20 Thread Segher Boessenkool
On Fri, May 20, 2022 at 09:21:43AM -0500, Paul E Murphy wrote: > >+PPC_FEATURE_HAS_ALTIVEC > >+Vector (aka Altivec, VSX) facility is available. > > I think "(aka Altivec, VSX)" might be more accurately stated as "(aka > Altivec)"? "Also known as AltiVec or VMX", yes. > >+PPC_FEATURE_HAS_DFP

Re: [RFC Linux patch] powerpc: add documentation for HWCAPs

2022-05-20 Thread Peter Bergner via Gcc
On 5/20/22 12:15 AM, Nicholas Piggin via Gcc wrote: > +PPC_FEATURE_HAS_ALTIVEC > +Vector (aka Altivec, VSX) facility is available. Slight typo. s/VSX/VMX/ Peter

Re: [RFC Linux patch] powerpc: add documentation for HWCAPs

2022-05-20 Thread Paul E Murphy via Gcc
On 5/20/22 12:15 AM, Nicholas Piggin via Gcc wrote: This takes the arm64 file and adjusts it for powerpc. Feature descriptions are vaguely handwaved by me. --- Anybody care to expand on or correct the meaning of these entries or bikeshed the wording of the intro? Many of them are no longer us

Re: [RFC Linux patch] powerpc: add documentation for HWCAPs

2022-05-20 Thread Nicholas Piggin via Gcc
Excerpts from Michael Ellerman's message of May 20, 2022 7:21 pm: > Nicholas Piggin via Libc-alpha writes: >> This takes the arm64 file and adjusts it for powerpc. Feature >> descriptions are vaguely handwaved by me. >> --- > > Thanks for attempting to document this. It was mainly copy and paste

Re: [RFC Linux patch] powerpc: add documentation for HWCAPs

2022-05-20 Thread Michael Ellerman
Nicholas Piggin via Libc-alpha writes: > This takes the arm64 file and adjusts it for powerpc. Feature > descriptions are vaguely handwaved by me. > --- Thanks for attempting to document this. > Anybody care to expand on or correct the meaning of these entries or > bikeshed the wording of the in