Fix soft-fp shadowing between __FP_FRAC_ADD_3 and _FP_MUL_MEAT_2_wide_3mul (bug 15667)

[Andreas Jaeger]

On 06/22/2013 02:10 PM, Joseph S. Myers wrote:
> This patch fixes bug 15667, soft-fp variables _c1 and _c2 in
> __FP_FRAC_ADD_3 shadowing those in _FP_MUL_MEAT_2_wide_3mul.
>
> I renamed the variables to include the full macro name.  Probably this
> should be done for all variables defined internally by any soft-fp
> macro (maybe using abbreviated versions of the macro names if the full
> names are too long and make the code too cumbersome); this patch
> simply addresses the particular case where shadowing actually occurs
> and shows up as test failures with the soft-fp fma patch I'll send
> separately after some further testing.
>
> Tested on MIPS64 in conjunction with that fma patch.

This is fine, thanks,

Andreas
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