Allen added inline comments.
================ Comment at: llvm/lib/Target/NVPTX/NVPTXInstrInfo.td:186 + !eq(name, "v2f16"): Float16x2Regs, + !eq(name, "bf16"): Float16Regs, + !eq(name, "v2bf16"): Float16x2Regs, ---------------- tra wrote: > tra wrote: > > Allen wrote: > > > sorry for a basic question: what's the different between bf16 and f16 ? > > https://en.wikipedia.org/wiki/Bfloat16_floating-point_format > > > If your question is why both bf16 and f16 use Float16Regs, then the answer is > that both use 'untyped' 16-bit *integer * registers. > The difference from Int16Regs is that those are signed. PTX has some awkward > restrictions on matching instructions and register kinds, even though under > the hood it all boils down to everything using 32-bit registers. Thanks for your explanation. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D136311/new/ https://reviews.llvm.org/D136311 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
