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riscv / riscv-v-spec

Working draft of the proposed RISC-V V vector extension
https://jira.riscv.org/browse/RVG-122
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is vsetdcfg deprecated? #913

Closed wanghuibin0 closed 1 year ago

wanghuibin0 commented 1 year ago

I am reading materials about RVV. In Chapter 4 of the book Computer Architecture, an instruction called vsetdcfg occurs in the example code. But I can't find description about vsetdcfg in this spec. Is it deprecated? Why?

nick-knight commented 1 year ago

The presentation in Computer Architecture, as well as The RISC-V Reader, concerns an early draft of the V-extension. The V-extension evolved considerably since then. You should treat the ISA spec as the definitive reference.

The functionality of vsetdcfg was largely folded into the vsetvl instructions.

wanghuibin0 commented 1 year ago

Oh, I see. Thanks for reply.