Re:MIPS Becomes RISC-V
by spamizbad on Monday March 08, 2021 @03:49PM
(#26391327)
I feel like MIPS and RISC-V are so closely related they're not terribly diverse. Academic MIPS evolved into RISC-V.
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Nope - they have different competing heritages - in this case the headline is "Berkeley beats Stanford"
Academic RISC was designed by Patterson and Hennessy. Hennessy went off and was one of the founders of MIPS, Patterson is one of the instrumental leaders in the RISC-V space.
Re:MIPS Becomes RISC-V
by brucehoult on Monday March 08, 2021 @10:40PM
(#26395175)
Patterson and Hennessy were in competition with each other, at different universities. It's only much later they wrote text books together.
Patterson says RISC-V is derived from RISC-I and RISC-II. I think this doesn't really old water -- at least no more so than any other RISC.
RISC-I and RISC-II had condition codes and register windows, like SPARC. RISC-V doesn't have either, like MIPS. The RISC-V assembly language is also very similar to MIPS.
RISC-II had both 16 and 32 bit opcodes (as did IBM 801, and Cray designs) and RISC-V has inherited this (but also following the great success of ARM Thumb2).
Nice that there's both MIPS and RISC-V versions of the book:
https://www.amazon.com/Computer-Organization-Design-MIPS-Arc...
https://www.amazon.com/Computer-Organization-Design-RISC-V-A...
I guess as of today we know which one to get.