sync.md (UNSPEC_LDA, UNSPEC_STA): New unspecs.

	* config/i386/sync.md (UNSPEC_LDA, UNSPEC_STA): New unspecs.
	(movdi_via_fpu): Remove.
	(loaddi_via_fpu): New insn pattern.
	(storedi_via_fpu): Ditto.
	(atomic_loaddi_fpu): Use loaddi_via_fpu and storedi_via_fpu.
	(atomic_storedi_fpu): Ditto.
	* reg-stack.c (get_true_reg): Handle UNSPEC_LDA.
	(subst_stack_regs_pat): Handle UNSPEC_STA.

From-SVN: r181812