EAL number to the value in ST(0)).</EM></FONT>

<BLOCKQUOTE><U>Note</U> that a QWORD integer in memory cannot be added directly to ST(0). If such an addition becomes necessary, the QWORD value must first be loaded to the FPU and then added with the FADD or <A HREF="fpuchap8.htm#faddp">FADDP</A> instruction.</BLOCKQUOTE>

An <B>I</B>nvalid operation exception is detected if the TOP data register ST(0) is empty or is a <A HREF="fpuchap2.htm#nans">NAN</A>, setting the related flag in the <A HREF="fpuchap1.htm#