Re: Oops (Concertina II Going Around in Circles)

On Fri, 10 May 2024 00:19 +0100 (BST), jgd@cix.co.uk (John Dallman)
wrote:

Not that justified the costs of implementing such a huge instruction set.

Well, having a huge instruction set defined and implementing all of it
are two different things.

Look at x86, how MMX got replaced by SSE which got replaced by AVX.

So if one is going to include instructions that will later become
obsolete, and be replaced by other instructions, not re-using the same
opcodes helps with upwards compatibility.

John Savard