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zu2_
searching PlanetScale…
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zu2_
4y ago
Oh, I was mistaken. I've verified that at least the rev instruction works (tested on clang -march=rv64imafdcb0p94).
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zu2_
4y ago
$ cat /proc/cpuinfo processor : 0 hart : 2 isa : rv64imafdc mmu : sv39 uarch : sifive,u74-mc
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zu2_
4y ago
No. VisionFive2's RISC-V CPU does not have the B extension. I confirmed it on the actual device. $ cat /proc/cpuinfo processor : 0 hart : 2 isa : rv64imafdc mmu : sv39 uarch : sifive,u74-mc