* doc/md.texi (extv@var{m}, extvmisalign@var{m}, extzv@var{m})
	(extzvmisalign@var{m}, insv@var{m}, insvmisalign@var{m}): Document.
	(insv, extv, extzv): Deprecate.
	* optabs.def (insv_optab, extv_optab, extzv_optab)
	(insvmisalign_optab, extvmisalign_optab, extzvmisalign_optab):
	New optabs.
	* optabs.c (get_optab_extraction_insn): New function.
	(get_extraction_insn): Use it.
	* config/mips/mips.md (extv): Split into...
	(extvmisalign<mode>, extv<mode>): ...these new patterns.  Rename
	existing extv<mode> pattern to...
	(*extv<mode>): ...this.
	(extzv): Split into...
	(extzvmisalign<mode>, extzv<mode>): ...these new patterns.  Rename
	existing extzv<mode> pattern to...
	(*extzv<mode>): ...this.
	(insv): Split into...
	(insvmisalign<mode>, insv<mode>): ...these new patterns.  Rename
	existing insv<mode> pattern to...
	(*insv<mode>): ...this.  Use const_int_operand rather than
	immediate_operand.
	* config/mips/mips.c (mips_block_move_straight): Use set_mem_size
	to set the size of BLKmode accesses.
	(mips_get_unaligned_mem): Require OP0 to be a BLKmode memory,
	turning it from an "rtx *" to an rtx.
	(mips_expand_ext_as_unaligned_load): Simplify for new optab
	interface.  Update call to mips_get_unaligned_mem.
	(mips_expand_ins_as_unaligned_store): Update call to
	mips_get_unaligned_mem.

From-SVN: r193606