soft-fp: remove unused macros

[David Miller]

From: "Joseph S. Myers" <joseph@codesourcery.com>
Date: Tue, 15 Oct 2013 23:34:28 +0000

> As noted in
> <https://sourceware.org/ml/libc-alpha/2013-10/msg00338.html>, the
> soft-fp macro _FP_DIV_MEAT_2_gmp is both unused (in glibc, libgcc and
> the Linux kernel) and bogus (would never have worked correctly).
> Thus, it seems appropriate to remove.  FP_UNSET_EXCEPTION is also
> unused in all three places; although the definition is perfectly
> valid, there seems to be no point in it (I think that if soft-fp code
> tries to set an exception and then later clear it, that indicates
> there's something wrong with that code - the same applies to
> FP_CLEAR_EXCEPTIONS, but that's still used at present in four sparc32
> files that should be able to define FP_NO_EXCEPTIONS and remove all
> the present exception-related code).
> 
> This patch removes those two unused macros.  Tested for powerpc-nofpu
> that there's no change to libc/libm disassembly, and committed.
> 
> 2013-10-15  Joseph Myers  <joseph@codesourcery.com>
> 
> 	* soft-fp/op-2.h (_FP_DIV_MEAT_2_gmp): Remove macro.
> 	* soft-fp/soft-fp.h (FP_UNSET_EXCEPTION): Likewise.

Looks good to me.