On Mon, 19 May 2025 17:46:45 GMT, anton@mips.complang.tuwien.ac.atThe Ferranti Atlas 2 and the EE KDF9 are both prior art.
(Anton Ertl) wrote:
John Levine <johnl@taugh.com> writes:Most DSPs have some kind of "loop buffer" from which they can executeThe 360/91 had primitive branch prediction in "loop mode". It had an>
eight doublewprd instruction queue (which it confusingly called a stack.)
If a program did a backward branch of less than eight doublewords, it'd
stop prefetching and execute out of the queue until the program fell or
branched out.
The 68010 had a similar feature (with a smaller buffer), but I don't
think one would call it branch prediction. In any case, I meant
speculative execution based on branch prediction (but did not write it
that way), and the 360/91 did not do speculative execution AFAIK.
>
- anton
without fetching code from memory.
--
Bill F.
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| 12 May 26 |  … |
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