[PATCH v2] MIPS: MIPS32r2 FP MADD instruction set support

[Maciej W. Rozycki]

On Tue, 16 Jul 2013, Richard Sandiford wrote:

> >  I have regression-tested this change with the mips-linux-gnu target and 
> > the mips32r2/o32 multilib.  I have also verified that the instructions 
> > affected were absent across the binaries produced by the testsuite before 
> > applying this change and present afterwards.  For some reason only MADD.S, 
> > MADD.D, MSUB.S and MSUB.D instructions were produced though -- it looks 
> > like none of NMADD.S, NMADD.D, NMSUB.S and NMSUB.D instructions has
> > coverage in our testsuite.
> 
> Hmm, can you double-check?  We have gcc.target/mips/nmadd-*, so if we're
> not producing the instructions there then that sounds like a bug.

 I only checked executables, these tests do not produce any.  I didn't 
think of checking tests that do not produce executables, because they do 
not check run-time validity of code produced.  These three tests you've 
referred to all pass with or without the change, but they are tangential 
to it because they all force -mips4.  Sorry for being inaccurate.

  Maciej