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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Was checking some mails exchanged in this mailing list a
while ago (2006) (<a
href="http://www.rtems.com/ml/rtems-users/2006/may/msg00040.html">http://www.rtems.com/ml/rtems-users/2006/may/msg00040.html</a>)
and would like to know if the issue concerning GCC and SPARC floating point
registers is now solved or not. Does anybody know the status of this issue? Is
there a bug in GCC bugzilla so that we can track this? try to find but with no
luck :(<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Briefly, the problem, as far as I understood, occurs when a
function receives multiple arguments: GCC might store some arguments on FPU
registers, which could cause all sort of problems, like an invalid FPU trap, or
an erroneous result on a thread that uses FPU (because the register was
changed). <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>This problem could be solved by compiling RTEMS with –msoft-float
flag and the application without this flag (for the sections that want to use
floating point).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>It also seams that ERC32 has a different behavior than Leon2
and Leon3: for Leon2 and Leon3, RTEMS does not save/restore hardware FPU during
a context switch. Is this correct? Shouldn’t the 3 BSPs have the same
behavior? Shouldn’t leon2 and leon3 save/restore the FPU hardware during
a context switch?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>(I’m looking at RTEMS 4.8.0)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks in advance<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Kind regards<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Manuel Coutinho<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
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