Tokyo stocks ended mixed Tuesday, as gains from banking issues and export-oriented automakers on a weaker yen were trimmed as tech stocks were sold before earnings releases from major companies. The 225-issue Nikkei Stock Average ended down 157.23 points, or 0.40 percent, from Monday at 39,376.09. The broader Topix index finished 1.84 points, or 0.07 percent, higher at 2,741.52. On the top-tier Prime Market, gainers were led by transportation equipment and rubber product issues, while top decliners were electric appliance and oil and coal product issues. The U.S. dollar briefly climbed above t…