patch to handle i386 stack alignment using PREFERRED_STACK_BOUNDARY

[Jeffrey A Law]

  In message < 19990324163511.B11149@cygnus.com >you write:
  > On Mon, Mar 22, 1999 at 11:37:04PM -0700, Jeffrey A Law wrote:
  > > Thanks.  Installed.  Plus a patch to set PREFERRED_STACK_BOUNDARY to
  > > 64 for the x86.
  > 
  > We might as well go ahead and set this to 128 for the
  > benefit of P3 SSE stuff.
I've got no serious objections.  It'll remove one barrier to using those insns
in the future.

jeff