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erc32 wrong compilation flags for initial task with fpu?
- Date: Thu, 27 Mar 2008 10:05:59 -0500
- From: joel.sherrill at OARcorp.com (Joel Sherrill)
- Subject: erc32 wrong compilation flags for initial task with fpu?
Aleix Conchillo Flaqu? wrote:
> On Thu, Mar 27, 2008 at 2:08 PM, Joel Sherrill
> <joel.sherrill at oarcorp.com> wrote:
>> Did you every configure the attributes of the initialization
>> task to be floating point or where you just getting lucky?
>> #define CONFIGURE_INIT_TASK_ATTRIBUTES RTEMS_FLOATING_POINT
> For sure.
> #define CONFIGURE_INIT_TASK_ATTRIBUTES RTEMS_LOCAL | RTEMS_FLOATING_POINT
> As I said, with 4.6.1, 4.6.2 and 4.6.4 the application worked fine.
> After the SPARC update in 4.6.5 it just failed at the initialisation
> task (which uses fpu). Removing the -msoft-float from 4.6.6 solved the
> Yesterday I looked at the patch for the whole afternoon and I did not
> see anything else that could affect, but I am not an expert in RTEMS
> internals, so probably I am missing something.
Look at cpukit/score/src/threadhandler.c and make sure
the thread wrapper code is actually initializing the FP
context correctly the first time to enable it.
Jiri can comment directly but I recall that the SPARC port
assumes RTEMS itself is always soft-float but the application
can be compiled with hardware FP enabled and things will
Joel Sherrill, Ph.D. Director of Research & Development
joel.sherrill at OARcorp.com On-Line Applications Research
Ask me about RTEMS: a free RTOS Huntsville AL 35805
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