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lkcl (Luke Kenneth Casson Leighton)
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Feb 5 2019, 5:08 PM (20 w, 36 m)

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Feb 6 2019

lkcl added a comment to D57504: RFC: Prototype & Roadmap for vector predication in LLVM.

remember that both RVV and SV support the exact same vscale (variable-length multiples of elements) concept.

We've already agreed that the unit of the vlen parameter is just the element type (that is the sub-vector element type in the vector-of-subvector interpretation of scalable types).

Feb 6 2019, 7:23 PM · Restricted Project

Feb 5 2019

lkcl added a comment to D57504: RFC: Prototype & Roadmap for vector predication in LLVM.

Certainly, that's why I say it's secondary and mostly a hint that something is amiss with "the current thinking". In fact, I am by now inclined to propose that Jacob and collaborators start out by expressing their architecture's operations with target-specific intrinsics that also use the attributes introduced here (especially since none of the typical vectorizers are equipped to generate the sort of code they want from scalar code using e.g. float4 types).

Feb 5 2019, 6:51 PM · Restricted Project