Xilinx's (NASDAQ: XLNX) second-quarter results turned out to be a mixed bag, but this hasn't dented investors' confidence in the stock given the chipmaker's bright long-term prospects. The company missed Wall Street's top-line expectations by a whisker, reporting $620 million in revenue as compared to $579 million in the year-ago quarter.However, Xilinx beat the bottom-line forecast by a couple of cents as its earnings jumped from $0.61 per share last year to $0.65 per share during the second quarter.