* config/mips/mips.md (SHORT): New mode macro.
(size): New mode attribute.
(extend[qh]i[sd]i2): Redefine using :GPR and :SHORT.
(*extend[qh]i[sd]i2): New define_insn_and_split, combining previous
*extend[qh]i[sd]i2 and *extend[qh]i[sd]i2_mem patterns. Use only if
!ISA_HAS_SEB_SEH.
(*extend[qh]i[sd]i2_se[bh]): New pattern, combining previous
*extend[qh]isi2_hw patterns and extending them to di.
(extendqihi2): Implement as define_insn_and_split that produces
extendqisi2 after reload.
From-SVN: r87075
