PATCH RFA: Fix simulator handling of floating point absolute value

[Frank Ch. Eigler]

ian wrote:

> [...]
> This patch changes sim_fpu_abs to always clear the sign bit of the
> argument.  It does not otherwise change the behaviour.  This, plus
> another patch I am about to sign, fixes the gcc copysign1 test for
> MIPS.
> 
> OK for mainline?
> [...]

Looks okay.  I can't find libgcc1 (soft-float emulation, the sim-fpu
code's ancestor) in current gcc any more to cross-check.  Newlib's
fabs implementation (libm/math/s_fabs.c) appears to clear the sign bit
in the same way as your new code.


- FChE