M68040FPSP Floating Point
Motorola 68040 floating point support package
Modified for RTEMS by Eric Norum (eric@norum.ca)
To include these routines in your application call
M68KFPSPInstallExceptionHandlers ();
before performing any floating point operations.
Acknowledgement
This code can be obtain from the Motorola Engineer's Toolbox WWW page at http://www.mot.com/SPS/HPESD/tools/freeware/040fpsp.html. Here is the description from that page:
The MC68040 contains a subset of the floating-point hardware that is implemented in the MC68881/882 devices and as such provides reduced yet high performance on-chip floating-point support. Those applications that require full compatibility with earlier members of the M68000 family will need to provide emulation support fo r the un-implemented MC68040 floating-point instructions. The M68040FPSP provides complete emulation of the floating-point functionality available in the MC68881/882.
The M68040FPSP is offered in source code form to allow integration into existing systems to support either a kernel or library version of floating-point support. The M68040FPSP operates in conjunction with the on-chip MC68040 features to provide fast and full emulation. The kernel version allows full emulation via a trap mechanism to allow full binary compatibility and is fully reentrant. The library version is used to eliminate the trap overhead in situation where re-compilation is possible or desired.
From this page one may download the original source code. Inline with the first sentence of the second paragraph, we have integrated it with RTEMS.