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LibJS: Add spec comments and check for edge cases in Math.asinh

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davidot 2022-11-28 12:01:29 +01:00 • committed by Andreas Kling
parent 6bdf021b0c
commit 68aeeea5d2
2 changed files with 14 additions and 1 deletions
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10
Userland/Libraries/LibJS/Runtime/MathObject.cpp
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@ -337,7 +337,15 @@ JS_DEFINE_NATIVE_FUNCTION(MathObject::asin)
// 21.3.2.5 Math.asinh ( x ), https://tc39.es/ecma262/#sec-math.asinh
JS_DEFINE_NATIVE_FUNCTION(MathObject::asinh)
{
return Value(::asinh(TRY(vm.argument(0).to_number(vm)).as_double()));
// 1. Let n be ? ToNumber(x).
auto number = TRY(vm.argument(0).to_number(vm));
// 2. If n is not finite or n is either +0𝔽 or -0𝔽, return n.
if (!number.is_finite_number() || number.is_positive_zero() || number.is_negative_zero())
return number;
// 3. Return an implementation-approximated Number value representing the result of the inverse hyperbolic sine of ℝ(n).
return Value(::asinh(number.as_double()));
}
// 21.3.2.6 Math.atan ( x ), https://tc39.es/ecma262/#sec-math.atan