altivec.md (UNSPEC_VSLW, [...]): New constants, used throughout.

2005-04-06  Paolo Bonzini  <bonzini@gnu.org>

	* config/rs6000/altivec.md (UNSPEC_VSLW, UNSPEC_SUBS,
	UNSPEC_SET_VSCR): New constants, used throughout.
	(*andc3_v4sf): New.
	(altivec_vspltisb, altivec_vsplitish, altivec_vsplitisw):
	Replace with...
	(altivec_vspltis<VI_char>): ... this pattern, using
	a QImode const_int_operand for the immediate.
	(abs<mode>2, absv4sf2, altivec_abss_<mode>): Rewrite as
	define_expands.

From-SVN: r97699