* config/i386/i386.md (isa): Add sse2, sse2_noavx, sse3,
	sse4 and sse4_noavx.
	(enabled): Handle sse2, sse2_noavx, sse3, sse4 and sse4_noavx.
	(*pushdf_rex64): Change Y2 register constraint to x.
	(*movdf_internal_rex64): Ditto.
	(*zero_extendsidi2_rex64): Ditto.
	(*movdi_internal): Change Y2 register constraint to x
	and update "isa" attribute.
	(*pushdf): Ditto.
	(*movdf internal): Ditto.
	(zero_extendsidi2_1): Ditto.
	(*truncdfdf_mixed): Ditto.
	(*truncxfdf2_mixed): Ditto.
	* config/i386/mmx.md (*mov<mode>_internal_rex64): Change Y2
	register constraint to x.
	(*movv2sf_internal_rex64): Ditto.
	(*mov<mode>_internal): Change Y2 register constraint to x
	and add "isa" attribute.
	(*movv2sf_internal): Ditto.
	(*vec_extractv2si_1): Ditto.
	* config/i386/sse.md ("vec_set<mode>_0): Change Y2 and Y4 register
	constraints to x and update "isa" attribute.
	(*vec_interleave_highv2df): Change Y3 registerconstraint
	to x and update "isa" attribute.
	(*vec_interleave_lowv2df): Ditto.
	(*vec_concatv2df): Change Y2 register constraint to x and
	update "isa" attribute.
	(sse2_loadld): Ditto.
	(*vec_extractv2di_1): Ditto.
	(*vec_dupv4si): Ditto.
	(*vec_dupv2di): Ditto.
	(*vec_concatv4si): Ditto.
	(vec_concatv2di): Ditto.
	* config/i386/constraints.md (Y2): Remove.
	(Y3): Ditto.
	(Y4): Ditto.

From-SVN: r178073