re PR target/17688 ([4.1] x87 fops can handle HImodes)

re PR target/17688 ([4.1] x87 fops can handle HImodes)

	PR target/17688
	* config/i386/i386.c (x86_use_himode_fiop): New.
	(x86_use_simode_fiop): Rename from x86_use_fiop.
	* config/i386/i386.h (x86_use_himode_fiop): Declare.
	(TARGET_USE_HIMODE_FIOP): New.
	(x86_use_simode_fiop): Rename from x86_use_fiop.
	(TARGET_USE_SIMODE_FIOP): Rename from TARGET_USE_FIOP.

	* config/i386/i386.md (X87MODEI12): New mode macro define.
	(*cmpfp_<mode>): Rename from *cmpfp_si.  Use X87MODEI12 mode macro
	to implement x87 FP compare with HImode input operands.
	(*fp_jcc_8<mode>_387, splitter): Rename from *fp_jcc_8_387.
	Use X87MODEI12 mode macro to handle HImode input operands.
	(*fop_sf_2<mode>_i387, *fop_sf_3<mode>_i387, *fop_df_2<mode>_i387,
	*fop_df_3<mode>_i387, *fop_xf_2<mode>_i387, *fop_xf_3<mode>_i387):
	Renamed from *fop_sf_2_i387, *fop_sf_3_i387, *fop_df_2_i387,
	*fop_df_3_i387, *fop_xf_2_i387, *fop_xf_3_i387. Use X87MODEI12 mode
	macro to implement x87 operators with HImode input operands.
	(fop splitters): Use X87MODEI12 mode macro to handle HImode
	input operands.

From-SVN: r96437