mips.md (bunge, [...]): New define_expands.

[gcc/]
	* config/mips/mips.md (bunge, bltgt, bungt): New define_expands.
	(sordered_df, sordered_sf): Remove.
	* config/mips/mips.c (get_float_compare_codes): New fn.
	(gen_int_relational, gen_conditional_move): Use it.

[gcc/testsuite]
	* gcc.c-torture/compile/20020923-1.c: New test.

From-SVN: r57684