[Libre-soc-isa] [Bug 1046] questions and re-submission of ls001 (SVP64 concept) PO9 Allocation proposal (as ls001.po9)

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Thu May 25 06:47:19 BST 2023


--- Comment #6 from Paul Mackerras <paulus at ozlabs.org> ---
Comments from IBM architects regarding LS001 (PO9 allocation):

This is more of a proposal than an RFC. The main ideas seem pretty clear and
plausible as extensions to the architecture, but there are details that aren’t

* The presentation is not consistent with what would actually appear in the
architecture document.

* No serious attempt is made to use documentation constructs in the existing
architecture, e.g., Engineering Notes, or terminology, e.g., hypervisor
emulation assistance interrupt.

* There are frequent references to other architectures instead of definitions
constructed from the ground up as is done in the Power ISA.

* Some definitions seem more appropriate as names associated with facility
descriptions in a new chapter about SimpleV than as standalone architecture

It seems likely that all of the RFCs that are pieces of SimpleV (not including
new scalar instructions) should be combined into a single RFC because it
doesn’t make sense to approve the component RFCs piecemeal.

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