RTEMS CPU Architecture Supplement
The Texas Instruments C3x/C4x family makes little distinction
between the various cpu registers. Although floating point
operations may only be performed on a subset of the cpu registers,
these same registers may be used for normal integer operations.
as a result of this, this port of rtems makes no distinction
between integer and floating point contexts. The routine
_CPU_Context_switch saves all of the registers that
comprise a task's context. the routines that initialize,
save, and restore floating point contexts are not present
in this port.
Moreover, there is no floating point context pointer and
the code in _Thread_Dispatch that manages the
floating point context switching process is disabled
on this port.
This not only simplifies the port, it also speeds up context switches by reducing the code involved and reduces the code space footprint of the executive on the Texas Instruments C3x/C4x.
RTEMS CPU Architecture Supplement
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