Content deleted Content added
Guy Harris (talk | contribs) →Many dubious and unsourced claims: So what widely-accepted definitions are there of "RISC" and "CISC"? |
Guy Harris (talk | contribs) →Many dubious and unsourced claims: Neither the Patterson/Ditzel "case for RISC" paper nor the 6th edition of H&P define RISC or CISC - the 6th edition of H&P doesn't even mention those terms. |
||
Line 125:
:And as for "CISC", as the article notes, it was coined retroactively, pretty much meaning "not RISC"; if "RISC" is interpreted sufficiently narrowly, "CISC" would then cover a rather wide range.
:So, yes, if there are widely-accepted (with sources to demonstrate the wide acceptance) definitions of RISC and CISC, that'd work, but, absent that, I'm not sure what could be done here. [[User:Guy Harris|Guy Harris]] ([[User talk:Guy Harris|talk]]) 05:27, 24 June 2023 (UTC)
::And [https://dl.acm.org/doi/10.1145/641914.641917 Patterson and Ditzel's "The Case for the Reduced Instruction Set Computer"], which may have been the origin of the "RISC" and "CISC" terms, doesn't appear to offer firm definitions of ''either'' term. It offers individual examples of complexity, but no broad definition of "complexity" or reduction of same. (If somebody were to look at [[VAX]] and then at post-Advanced Function announcement [[IBM System/370|S/370]] (post-Advanced Function so they both have paged MMUs), and don't look at the S/370 I/O instructions, they might well conclude that the latter has less complexity than the former - much simpler procedure call instructions, fewer addressing modes and none that modify registers, and even simpler version of the decimal arithmetic/string processing/"this is for doing COBOL and PL/I PICTUREs" instructions.)
::So that paper could be considered a ''reliable'' source, but not a source very useful for the goal of clearly defining RISC or CISC.
::And the 6th edition of a book John Hennessy co-wrote with another researcher :-) doesn't, as I noted in [https://en.wikipedia.org/w/index.php?title=Complex_instruction_set_computer&diff=1161013939&oldid=1160988640 this edit], use the terms "RISC" or "CISC", so it may be more of a case of "RISC: tired, load-store architecture: wired" abd "CISC: tired, non-load-store architecture: wired" now. [[User:Guy Harris|Guy Harris]] ([[User talk:Guy Harris|talk]]) 06:36, 24 June 2023 (UTC)
| |||