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>From "Vitor M. F. Santos" <vitor@ua.pt>: > The question is, how can I assure that code compiled > for a 68020+68881 platform will run without any problems > on a 68040 platform? Must I avoid the use of trigonometric > functions only, or is it more than that? Vitor, you must use the 68040 FSPP software package from Mororola to do this. The floating point instructions of the 68881/2 which are not implemented by this processor cause an exception; the FSPP package catches the exception and emulates the instruction in software. Once installed, the FSPP is transparent. You can get the FSPP from the Motorola FTP site. I havn't used it myself, so I can't offer any further advice. Can anyone offer a procedure for installing this package? How does it relate to the math library of Newlib? Can it be massaged into a higher performance form of libm.a for 68040s? An alternative is to compile with -msoft-float, which will prevent gcc emitting any floating-point instructions at all. Robin Kirkham CSIRO Division of Manufacturing Technology Project Engineer Locked Bag 9, Preston 3072, Australia robin.kirkham@mlb.dmt.csiro.au Phone: +61 3 9662-7756 Fax: +61 3 9662-7853