The following companies reported earnings after the close on Thursday.Advanced Micro Devices reported a bigger-than-expected loss of 71 cents per share, or 49 cents when excluding charges relating to the acquisition and integration of Allegheny Technologies. Analysts were expecting per-share results of 62 cents. Revenue was 23% higher during the latest reporting period to $1.63 billion, easily topping Street expectations of $1.52 billion. Gross profit margin reached 41%, down from 51% the previous year, but up from 33% in the second quarter. In pre-market activity, AMD shares are up a fraction.Xilinx reported that second-quarter profit reached $89.7 million, or 30 cents per share, a 4% drop from year-ago results but a penny better than analysts were expecting. Revenue dropped 5% to $444.9 million, on par with Wall Street's consensus view. For the third quarter, XLNX officials expect revenue to rise between 2% and 6%, suggesting a range of $453.8 million and $471.6 million, surrounding analysts' expectations of $463.8 million. XLNX is virtually unchanged ahead of the open.Gilead Sciences announced third-quarter profit of $398.3 million, or 42 cents per share, up from a year-ago loss of $52.1 million (6 cents per share). Analysts were expecting results of 39 cents per share. Sales jumped 41% during the period to $1 billion, thanks in large part to the biopharmaceuticals firm's line of HIV products. GILD expects 2007 product sales to come in at the high end of its previous guidance of $3.6 billion to $3.7 billion. GILD dipped slightly in after-hours trading last night but is unchanged just before the opening bell.