[Libre-soc-isa] [Bug 1056] questions and feedback (v2) on OPF RFC ls010

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Tue May 30 00:14:52 BST 2023


--- Comment #22 from Paul Mackerras <paulus at ozlabs.org> ---
(In reply to Luke Kenneth Casson Leighton from comment #12)

> it is *always* a Defined-word-instruction, where that DWI **MUST**
> have the exact same definition as if it had no prefix at all
> (caveat: bar the niggles on elwidth).

What about saturating arithmetic?

Could the instruction in fact do nothing, because of predication?

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