System.Xml.Xsl.XPathConvert.BigNumber.Normalize C# (CSharp) Method

            private void Normalize() {
                int w1, w2;

                // Normalize mantissa
                if (0 == this.u2) {
                    if (0 == this.u1) {
                        if (0 == this.u0) {
                            this.exp = 0;
                            return;
                        }
                        this.u2 = this.u0;
                        this.u0 = 0;
                        this.exp -= 64;
                    } else {
                        this.u2 = this.u1;
                        this.u1 = this.u0;
                        this.u0 = 0;
                        this.exp -= 32;
                    }
                }

                if (0 != (w1 = CbitZeroLeft(this.u2))) {
                    w2 = 32 - w1;
                    this.u2 = (this.u2 << w1) | (this.u1 >> w2);
                    this.u1 = (this.u1 << w1) | (this.u0 >> w2);
                    this.u0 = (this.u0 << w1);
                    this.exp -= w1;
                }
            }