abrown opened PR #1994 from widen to main:
After #1990 is merged, this change adds the remaining instructions necessary for passing all of the current SIMD spec tests. This implementation uses
PALIGNR,PMOVSX*andPMOVZX*for lowering the Wasm SIMD widen instructions. It also adds a mechanism for merging lanes in the CDSL for calculating the various type conversions (e.g.i16x8is widened toi32x4).
Last updated: Feb 24 2026 at 05:28 UTC