Re: [PATCH] i386 rw semaphore + use for mmap_sem

Jamie Lokier (
Tue, 23 Nov 1999 02:02:35 +0100

Manfred Spraul wrote:
> I guess you need "jump if the old value was below zero"
> this would be "jump if sign or carry", but this instruction doesn't
> exist.

If you really need that you can just put two jumps, one after the
other. Doesn't do wonders for the branch predicator but it works.

-- Jamie

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