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The classic distinction is that a CISC has data processing instructions with memory operands, and in a RISC they only take register parameters. This gets fuzzy
by 201984 10mo ago
The classic distinction is that a CISC has data processing instructions with memory operands, and in a RISC they only take register parameters. This gets fuzzy though when you look at AArch64 atomic instructions like ldadd which do read-modify-write all in a single instruction.
- clausecker 10mo agoThat's more "load store architecture" than RISC. And by that measure, S/360 could be considered a RISC.