Messages in this thread | | | From | Linus Torvalds <> | Date | Fri, 15 Sep 2023 19:14:52 -0700 | Subject | Re: [PATCH 08/17] alpha: Implement xor_unlock_is_negative_byte |
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On Fri, 15 Sept 2023 at 19:01, Linus Torvalds <torvalds@linux-foundation.org> wrote: > > No, I think "mov src,dst" is just a pseudo-op for "or src,src,dst", > there's no actual "mov" instruction, iirc.
Bah. I looked it up. It's actually supposed to be "BIS r31,src,dst".
Where "BIS" is indeed what most sane people call just "or". I think it's "BIt Set", but the assembler will accept the normal "or" mnemonic too.
There's BIC ("BIt Clear") too. Also known as "and with complement".
I assume it comes from some VAX background. Or maybe it's just a NIH thing and alpha wanted to be "special".
Linus
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