sorear changed the topic of #riscv to: RISC-V instruction set architecture | https://riscv.org | Logs: https://libera.irclog.whitequark.org/riscv
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<geist> oh hey just got a notice from Intel about the new NIOS V processor they have. you can guess what ISA its based on
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<solrize> what was nios again?
<solrize> oh right softcore
<solrize> maybe they can put some riscv hard macros onto their fpgas
<solrize> i mean why softcores?
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<drmpeg> It's only RV32IA.
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<solrize> yeah what i mean is practical fpgas are full of hard blocks that would be silly to implement as LUTs. e.g. memory, multipliers, etc. why not small cpu cores?
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<KombuchaKip> What is the riscv64 counterpart to SSE / AltiVec? Is there a similar SIMD extension or is this built into the ISA for RISC-V?
<jrtc27> there's V and there's P
<jrtc27> V is scalable vectors a la AArch64 SVE
<jrtc27> P is packed SIMD, but focused on DSP uses
<jrtc27> I don't think people anticipate the two coexisting, with the latter only really for embedded or microcontrollers, but could be wrong
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<muurkha> huh, I didn't know there wasa P spec
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<muurkha> I thought the V spec was the whole strategy
<muurkha> is it more accurate to say a la AArch64 SVE rather than a la Cray?
<zz> that's what people thought of MMX. And look, we now have SSE4 and beyond.
<zz> ("the whole strategy")
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<jrtc27> P and V have both been reserved for Packed SIMD and Vectors respectively for years in the unpriv spec
<jrtc27> with the non-normative text "Discussions at the 5th RISC-V workshop indicated a desire to drop this packed-SIMD proposal for floating-point registers in favor of standardizing on the V extension for large floating-point SIMD operations. However, there was interest in packed-SIMD fixed-point operations for use in the integer registers of small RISC-V implementations. A task group is working to define the new P extension."
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<sorear> muurkha: there might be convergent similarities between the two but SVE wasn't public until quite recently
<sorear> the other short answer is "read Krste's theses" :x
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