mips.md (muldi3_r4000): Broaden the output template and attribute assignments to handle three operand...
* mips/mips.md (muldi3_r4000): Broaden the output template
and attribute assignments to handle three operand dmult;
rename to muldi3_internal2.
(muldi3): Call the new muldi3_internal2 for R4000, and
any GENERATE_MULT3 chip.
From-SVN: r16927
