[Bug target/63260] [SH] fabs, fneg do not need fp-mode setting and do not use fpscr

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63260

--- Comment #1 from Oleg Endo <olegendo at gcc dot gnu.org> ---
The following functions should not show any mode changes:

float test_0 (float x)
{
  return -x;
}

double test_1 (double x)
{
  return -x;
}

float test_2 (float x)
{
  return __builtin_fabs (x);
}

double test_3 (double x)
{
  return __builtin_abs (x);
}