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features.json: watr supports half precision as of 5.8.0 - #559

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tomayac merged 1 commit into
WebAssembly:mainfrom
dy:watr-half-precision
Aug 19, 2026
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features.json: watr supports half precision as of 5.8.0#559
tomayac merged 1 commit into
WebAssembly:mainfrom
dy:watr-half-precision

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@dy

@dy dy commented Aug 18, 2026

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Marks half precision as supported by watr since v5.8.0.

Covers the full instruction set from the proposal Overview: f32.load_f16/f32.store_f16, all f16x8.* lane/arithmetic/comparison/conversion ops, f16x8.madd/nmadd, and (v128.const f16x8 ...) with exact round-to-nearest-even binary16 literal encoding. Opcodes follow V8 (--experimental-wasm-fp16); output is differentially tested against V8 validation, Float16Array arithmetic, and DataView.setFloat16 in test/half-precision.js.

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LGTM, thanks!

@tomayac
tomayac merged commit 5d466d1 into WebAssembly:main Aug 19, 2026
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2 participants