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Extracting all lanes from a v128 #1529

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verbessern opened this issue Sep 16, 2024 · 0 comments

verbessern commented Sep 16, 2024 •

edited

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At the moment (as far as I see) the only way to extract more then one lane from a v128 value is to do the following:

(local $t v128)
...
  local.tee $t
  f32x4.extract_lane 0
  local.get $t
  f32x4.extract_lane 1
  local.get $t
  f32x4.extract_lane 2
  local.get $t
  f32x4.extract_lane 3
...

This seems quite inefficient, and clearly has a large storage footprint. I'm wondering whether there is a need of [f32x4,f64x2,...].extract_all.

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