re PR target/33635 (Bootstrap broken on mips-sgi-irix6.5)

re PR target/33635 (Bootstrap broken on mips-sgi-irix6.5)

gcc/
	PR target/33635
	* config/mips/mips-protos.h (mips_split_64bit_move): Rename to...
	(mips_split_doubleword_move): ...this.
	* config/mips/mips.c (mips_subword): Extend to handle 64-bit words;
	use natural endianness for multi-format FPR values.
	(mips_split_64bit_move): Rename to...
	(mips_split_doubleword_move): ...this and extend to 64-bit words.
	Use move_doubleword_fpr* patterns for moves involving FPRs.
	(mips_save_reg): Update the call to mips_split_64bit_move.
	(mips_secondary_reload_class): Return NO_REGS for any reload of a
	nonzero constant into an FPR if the constant can be forced to memory.
	* config/mips/mips.md: Update the splitter calls to
	mips_split_64bit_move.
	(UNSPEC_LOAD_DF_LOW): Rename to...
	(UNSPEC_LOAD_LOW): ...this.
	(UNSPEC_LOAD_DF_HIGH): Rename to...
	(UNSPEC_LOAD_HIGH): ...this.
	(UNSPEC_STORE_DF_HIGH): Rename to...
	(UNSPEC_STORE_WORD): ...this.
	(SPLITF): New mode iterator.
	(HALFMODE): New mode attribute.
	(movtf): New expander.
	(*movtf_internal): New define_insn_and_split.
	(move_doubleword_fpr<mode>): New expander.
	(load_df_low, load_df_high, store_df_high, mthc1, mfhc1): Replace
	with...
	(load_low<mode>, load_high<mode>, store_word<mode>, mthc1<mode>)
	(mfhc1<mode>): ...these more general patterns.

gcc/testsuite/
	PR target/33635
	* gcc.target/mips/mips.exp (setup_mips_tests): Set mips_isa_rev
	and mips_forced_be.
	(dg-mips-options): Handle -EL and -mel.  Make -mfp64 imply
	-mhard-float and a suitable ISA.  Improve handling of -mipsXrY
	options.
	* gcc.target/mips/fpr-moves-1.c: New test.
	* gcc.target/mips/fpr-moves-2.c: Likewise.
	* gcc.target/mips/fpr-moves-3.c: Likewise.
	* gcc.target/mips/fpr-moves-4.c: Likewise.
	* gcc.target/mips/fpr-moves-5.c: Likewise.
	* gcc.target/mips/fpr-moves-6.c: Likewise.
	* gcc.target/mips/mips32r2-mxhc1.c: Remove -march=mips32r2

From-SVN: r128991