PowerPC BSP mvme5500 and hardfloat.

[Sebastian Huber]

On 2013-12-12 15:26, Matt Wette wrote:
> But if you don't use FP in ISR you still need to compile the ISR with
> -fsoft-float because the compiler may dirty the FP registers otherwise.
> For example: a = b; where a, b are struct timespec may be implemented in FP
> registers.

In case the ISR uses operating system services, then this is highly dangerous 
since operating system functions are not compiled with -msoft-float in this 
case.  Also on PowerPC the hard-float and soft-float ABIs are incompatible.

The distinction between floating-point and non-floating-point tasks is 
questionable with modern compilers.

-- 
Sebastian Huber, embedded brains GmbH

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