github.com/gopherjs/gopherjs@v1.19.0-beta1.0.20240506212314-27071a8796e4/compiler/prelude/numeric.js

var $min = Math.min;
var $mod = (x, y) => { return x % y; };
var $parseInt = parseInt;
var $parseFloat = f => {
    if (f !== undefined && f !== null && f.constructor === Number) {
        return f;
    }
    return parseFloat(f);
};

var $froundBuf = new Float32Array(1);
var $fround = Math.fround || (f => {
    $froundBuf[0] = f;
    return $froundBuf[0];
});

var $imul = Math.imul || ((a, b) => {
    var ah = (a >>> 16) & 0xffff;
    var al = a & 0xffff;
    var bh = (b >>> 16) & 0xffff;
    var bl = b & 0xffff;
    return ((al * bl) + (((ah * bl + al * bh) << 16) >>> 0) >> 0);
});

var $floatKey = f => {
    if (f !== f) {
        $idCounter++;
        return "NaN$" + $idCounter;
    }
    return String(f);
};

var $flatten64 = x => {
    return x.$high * 4294967296 + x.$low;
};

var $shiftLeft64 = (x, y) => {
    if (y === 0) {
        return x;
    }
    if (y < 32) {
        return new x.constructor(x.$high << y | x.$low >>> (32 - y), (x.$low << y) >>> 0);
    }
    if (y < 64) {
        return new x.constructor(x.$low << (y - 32), 0);
    }
    return new x.constructor(0, 0);
};

var $shiftRightInt64 = (x, y) => {
    if (y === 0) {
        return x;
    }
    if (y < 32) {
        return new x.constructor(x.$high >> y, (x.$low >>> y | x.$high << (32 - y)) >>> 0);
    }
    if (y < 64) {
        return new x.constructor(x.$high >> 31, (x.$high >> (y - 32)) >>> 0);
    }
    if (x.$high < 0) {
        return new x.constructor(-1, 4294967295);
    }
    return new x.constructor(0, 0);
};

var $shiftRightUint64 = (x, y) => {
    if (y === 0) {
        return x;
    }
    if (y < 32) {
        return new x.constructor(x.$high >>> y, (x.$low >>> y | x.$high << (32 - y)) >>> 0);
    }
    if (y < 64) {
        return new x.constructor(0, x.$high >>> (y - 32));
    }
    return new x.constructor(0, 0);
};

var $mul64 = (x, y) => {
    var x48 = x.$high >>> 16;
    var x32 = x.$high & 0xFFFF;
    var x16 = x.$low >>> 16;
    var x00 = x.$low & 0xFFFF;

    var y48 = y.$high >>> 16;
    var y32 = y.$high & 0xFFFF;
    var y16 = y.$low >>> 16;
    var y00 = y.$low & 0xFFFF;

    var z48 = 0, z32 = 0, z16 = 0, z00 = 0;
    z00 += x00 * y00;
    z16 += z00 >>> 16;
    z00 &= 0xFFFF;
    z16 += x16 * y00;
    z32 += z16 >>> 16;
    z16 &= 0xFFFF;
    z16 += x00 * y16;
    z32 += z16 >>> 16;
    z16 &= 0xFFFF;
    z32 += x32 * y00;
    z48 += z32 >>> 16;
    z32 &= 0xFFFF;
    z32 += x16 * y16;
    z48 += z32 >>> 16;
    z32 &= 0xFFFF;
    z32 += x00 * y32;
    z48 += z32 >>> 16;
    z32 &= 0xFFFF;
    z48 += x48 * y00 + x32 * y16 + x16 * y32 + x00 * y48;
    z48 &= 0xFFFF;

    var hi = ((z48 << 16) | z32) >>> 0;
    var lo = ((z16 << 16) | z00) >>> 0;

    var r = new x.constructor(hi, lo);
    return r;
};

var $div64 = (x, y, returnRemainder) => {
    if (y.$high === 0 && y.$low === 0) {
        $throwRuntimeError("integer divide by zero");
    }

    var s = 1;
    var rs = 1;

    var xHigh = x.$high;
    var xLow = x.$low;
    if (xHigh < 0) {
        s = -1;
        rs = -1;
        xHigh = -xHigh;
        if (xLow !== 0) {
            xHigh--;
            xLow = 4294967296 - xLow;
        }
    }

    var yHigh = y.$high;
    var yLow = y.$low;
    if (y.$high < 0) {
        s *= -1;
        yHigh = -yHigh;
        if (yLow !== 0) {
            yHigh--;
            yLow = 4294967296 - yLow;
        }
    }

    var high = 0, low = 0, n = 0;
    while (yHigh < 2147483648 && ((xHigh > yHigh) || (xHigh === yHigh && xLow > yLow))) {
        yHigh = (yHigh << 1 | yLow >>> 31) >>> 0;
        yLow = (yLow << 1) >>> 0;
        n++;
    }
    for (var i = 0; i <= n; i++) {
        high = high << 1 | low >>> 31;
        low = (low << 1) >>> 0;
        if ((xHigh > yHigh) || (xHigh === yHigh && xLow >= yLow)) {
            xHigh = xHigh - yHigh;
            xLow = xLow - yLow;
            if (xLow < 0) {
                xHigh--;
                xLow += 4294967296;
            }
            low++;
            if (low === 4294967296) {
                high++;
                low = 0;
            }
        }
        yLow = (yLow >>> 1 | yHigh << (32 - 1)) >>> 0;
        yHigh = yHigh >>> 1;
    }

    if (returnRemainder) {
        return new x.constructor(xHigh * rs, xLow * rs);
    }
    return new x.constructor(high * s, low * s);
};

var $divComplex = (n, d) => {
    var ninf = n.$real === Infinity || n.$real === -Infinity || n.$imag === Infinity || n.$imag === -Infinity;
    var dinf = d.$real === Infinity || d.$real === -Infinity || d.$imag === Infinity || d.$imag === -Infinity;
    var nnan = !ninf && (n.$real !== n.$real || n.$imag !== n.$imag);
    var dnan = !dinf && (d.$real !== d.$real || d.$imag !== d.$imag);
    if (nnan || dnan) {
        return new n.constructor(NaN, NaN);
    }
    if (ninf && !dinf) {
        return new n.constructor(Infinity, Infinity);
    }
    if (!ninf && dinf) {
        return new n.constructor(0, 0);
    }
    if (d.$real === 0 && d.$imag === 0) {
        if (n.$real === 0 && n.$imag === 0) {
            return new n.constructor(NaN, NaN);
        }
        return new n.constructor(Infinity, Infinity);
    }
    var a = Math.abs(d.$real);
    var b = Math.abs(d.$imag);
    if (a <= b) {
        var ratio = d.$real / d.$imag;
        var denom = d.$real * ratio + d.$imag;
        return new n.constructor((n.$real * ratio + n.$imag) / denom, (n.$imag * ratio - n.$real) / denom);
    }
    var ratio = d.$imag / d.$real;
    var denom = d.$imag * ratio + d.$real;
    return new n.constructor((n.$imag * ratio + n.$real) / denom, (n.$imag - n.$real * ratio) / denom);
};