Robert Grimm wrote: > Actually, I saw some old posts that talked about a -fno-implicit-fp option
[I know this is a very old post, but I noticed it in old email and felt it might still be useful to reply.] CodeSourcery has a -fno-implicit-fp option that does exactly what you have requested in some of our compilers. We use this particularly in the context of VxWorks; on VxWorks, the kernel will only save/restore floating-point registers across task switches for tasks that are designated as floating-point tasks. Therefore, using an FPR in a non-floating-point task is a bug. Because there is so much VxWorks code out there that does not use -msoft-float, it's not practical to require that programmers use -msoft-float for all files, and then explicitly turn on hard-float for floating-point tasks. We offered to contribute this code, but the FSF GCC maintainers decided not to accept it. -- Mark Mitchell CodeSourcery m...@codesourcery.com (650) 331-3385 x713
