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Impove nearest operation portable polyfill #2105

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Merged
MaxGraey merged 2 commits into from
Oct 24, 2021
Merged

Impove nearest operation portable polyfill #2105

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3396799
impove nearest js portable polyfill
MaxGraey Oct 24, 2021
b3f4608
refactor
MaxGraey Oct 24, 2021
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10 changes: 5 additions & 5 deletions std/portable/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -136,12 +136,12 @@ if (typeof globalScope.ASC_TARGET === "undefined") {

globalScope["floor"] = Math.floor;

// Adopt code from https://github.com/rfk/wasm-polyfill
globalScope["nearest"] = function nearest(value) {
if (Math.abs(value - Math.trunc(value)) === 0.5) {
return 2.0 * Math.round(value * 0.5);
}
return Math.round(value);
const INV_EPS64 = 4503599627370496.0;
const y = Math.abs(value);
return y < INV_EPS64
? Math.abs(y + INV_EPS64 - INV_EPS64) * Math.sign(value)
: value;
};

globalScope["select"] = function select(ifTrue, ifFalse, condition) {
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