Re:Major Changes at RISC-V Designer SiFive
by monocasa on Tuesday October 24, 2023 @09:55AM
(#37999233)
Rivos was formed from a bunch of ex-Apple CPU engineers. I'm sure they would feel more comfortable with a closer to AArch64 derived design as well.
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Re:Major Changes at RISC-V Designer SiFive
by gchadwick on Tuesday October 24, 2023 @12:23PM
(#38001432)
They might also know a bunch of techniques to give high performance that only work if you've got nice 32-bit only aligned instructions!
Re:Major Changes at RISC-V Designer SiFive
by kajiryoji on Tuesday October 24, 2023 @03:21PM
(#38003979)
Haha that'd be a little counterintuitive given all 32-bit aligned is the trivial case for decoding variable length instructions, unless you're thinking about prefetching/branch prediction etc
> all 32-bit aligned is the trivial case for decoding variable length instructions
That's the point? You can go faster if everything is 32-bit aligned, i.e. you don't have variable length instructions.