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WebAssembly / simd

Branch of the spec repo scoped to discussion of SIMD in WebAssembly
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[spectext] Add semantics for v128.load32_zero v128.load64_zero #439

Closed ngzhian closed 3 years ago

ngzhian commented 3 years ago

These instructions load 32/64 bits, then zero-extends them to the full 128 bits. The formalization thus use unsigned extensions to specify these instructions.