[PATCH] D110523: [AArch64][SVE] Fix extract_subvector patterns for unpacked fp types.

[Sander de Smalen via Phabricator via llvm-commits]

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The patterns added in D110163 <https://reviews.llvm.org/D110163> were incorrect, since it used the wrong
element widths for its shuffles.

Example for nxv2f16 extract_subvector(nxv8f16 %in, 6):
<a|b|c|d|e|f|g|h>

      ^^^
  extract g and h.

> UUNPKHI .h -> .s results in:
==============================

<e  |f  |g  |h  >

> UUNPKHI .s -> .d results in:
==============================

<g      |h      >


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D110523

Files:
  llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
  llvm/test/CodeGen/AArch64/sve-extract-scalable-vector.ll

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