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improve accuracy of Math.{ asinh, cbrt, log1p } polyfills with big and small values

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This commit is contained in:
Denis Pushkarev
2026-04-10 11:53:30 +03:00
parent 3e325dfe1b
commit 7b327e75fd
10 changed files with 34 additions and 4 deletions
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packages/core-js/internals/math-log1p.js
+3 -1
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@@ -6,5 +6,7 @@ var log = Math.log;
// eslint-disable-next-line es/no-math-log1p -- safe
module.exports = Math.log1p || function log1p(x) {
var n = +x;
return n > -1e-8 && n < 1e-8 ? n - n * n / 2 : log(1 + n);
if (n > -1e-8 && n < 1e-8) return n - n * n / 2;
var u = 1 + n;
return u === 1 ? n : n === u - 1 ? log(u) : n * log(u) / (u - 1);
};
packages/core-js/modules/es.math.asinh.js
+3 -1
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@@ -1,5 +1,6 @@
'use strict';
var $ = require('../internals/export');
var log1p = require('../internals/math-log1p');
// eslint-disable-next-line es/no-math-asinh -- required for testing
var $asinh = Math.asinh;
@@ -11,7 +12,8 @@ var SQRT_2_POW_53 = 94906265.62425156;
function asinh(x) {
var n = +x;
return !isFinite(n) || n === 0 ? n : n < 0 ? -asinh(-n) : n > SQRT_2_POW_53 ? log(n) + LN2 : n < 1e-8 ? n : log(n + sqrt(n * n + 1));
return !isFinite(n) || n === 0 ? n : n < 0 ? -asinh(-n) : n > SQRT_2_POW_53 ? log(n) + LN2
: n < 1e-8 ? n : log1p(n + n * n / (1 + sqrt(n * n + 1)));
}
var FORCED = !($asinh && 1 / $asinh(0) > 0);
packages/core-js/modules/es.math.cbrt.js
+3 -1
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@@ -10,6 +10,8 @@ var pow = Math.pow;
$({ target: 'Math', stat: true }, {
cbrt: function cbrt(x) {
var n = +x;
return sign(n) * pow(abs(n), 1 / 3);
var y = sign(n) * pow(abs(n), 1 / 3);
// Newton-Raphson refinement for better precision
return n !== 0 && isFinite(n) ? (2 * y + n / (y * y)) / 3 : y;
}
});