[Libre-soc-isa] [Bug 650] write rfc for OpenPower fpr <-> gpr moves/conversions

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Thu Jun 3 22:40:47 BST 2021


--- Comment #16 from Jacob Lifshay <programmerjake at gmail.com> ---
(In reply to Luke Kenneth Casson Leighton from comment #15)
> nuts, hit send too soon.
> https://git.libre-soc.org/?p=libreriscv.git;a=commitdiff;
> h=caa35bce868af3880119aa4cacbd520b23eaae34
> what we think is obvious, is not.  the list is "note-form", i.e.
> it's a map - a reminder - to *you* - of what is obvious *to you*.

it's intended to be a short summary/motivating explanation. The full semantics
are in the instruction descriptions.
> unfortunately, with no explicit context, the indented bullet-list
> makes no sense (to me, who does not know the context), and
> consequently it's *definitely* not going to make sense to someone
> who has even less context.
> in particular, the "standard Integer -> FP conversion": which standard
> is that? it needs to be explicitly listed.

The standard used by nearly all programming languages and cpus: IEEE 754.

> then, now that each is moved to their own sub-section, each piece
> which was previously a statement is no longer a complete sentence:
> a paragraph is needed which introduces them each.
> writing standards is hard!


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