Method clz32

rhino/src/main/java/org/mozilla/javascript/NativeMath.java:192–229

(
            Context cx, JSFunction f, Object nt, VarScope s, Object thisObj, Object[] args)

    }

    private static Object clz32(
            Context cx, JSFunction f, Object nt, VarScope s, Object thisObj, Object[] args) {
        double x = ScriptRuntime.toNumber(args, 0);
        if (x == 0 || Double.isNaN(x) || Double.isInfinite(x)) {
            return Double32;
        }
        long n = ScriptRuntime.toUint32(x);
        if (n == 0) {
            return Double32;
        }

        int place = 0;
        if ((n & 0xFFFF0000) != 0) {
            place += 16;
            n >>>= 16;
        }
        if ((n & 0xFF00) != 0) {
            place += 8;
            n >>>= 8;
        }
        if ((n & 0xF0) != 0) {
            place += 4;
            n >>>= 4;
        }
        if ((n & 0b1100) != 0) {
            place += 2;
            n >>>= 2;
        }
        if ((n & 0b10) != 0) {
            place += 1;
            n >>>= 1;
        }
        if ((n & 0b1) != 0) {
            place += 1;
        }

        return Double.valueOf(32 - place);
    }

    private static Object cos(
            Context cx, JSFunction f, Object nt, VarScope s, Object thisObj, Object[] args) {