#2270: SPARC: Optimized floating-point context handling
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Reporter: sebastian.huber | Owner: sebastian.huber
Type: enhancement | Status: accepted
Priority: normal | Milestone: 4.11.1
Component: cpukit | Version: 4.11
Severity: normal | Resolution:
Keywords: SPARC |
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Comment (by claudiodcsilva):
I guess 2) is an overkill. In 1), if you really need to have FP, you can
try to use soft-fp. It will make your WCET "worse", but it should be
better than having to context switch FP registers in every interrupt.
Anyway, you are always in risk of GCC emitting FP instructions within
RTEMS' code, but since you have PSR[EF] disabled you can easily trace the
fault/trap.
Between 1) and 3), 1) is more simple. Besides, I think the worst case
behaviour will be similar between these two options.
--
Ticket URL: <http://devel.rtems.org/ticket/2270#comment:6>
RTEMS Project <http://www.rtems.org/>
RTEMS Project
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