[R] Questions about Preserving registers

[Duncan Murdoch]

On Thu, 10 Jun 2004 09:12:05 -0700 (PDT), Thomas Lumley
<tlumley at u.washington.edu> wrote :

>> DLL attempted to change FPU control word from 9001f to 90003
>>
>> I read the instruction on Duncan Murdoch’s website about preserving
>> registers, but I still don’t understand it. For example,
>
>This code is for Delphi.  You would need to see how to set the FPU control
>work in Powerstation Fortran, which should be described in its manual.
>
>The warning is harmless, so you could just ignore it.  The warning means
>that R has done the change for you.

I think it's better to try to fix it.  R only checks once (on
loading); if Fortran makes the change again, then R code might go
wrong later, and if Fortran depends on the original value, then the
Fortran code might not work properly.

Duncan Murdoch