gcc/
	* Makefile.in (USER_H): Remove decfloat.h.
	* ginclude/decfloat.h: Delete, moving contents to ...
	* ginclude/float.h: Add support for decimal floating point,
	guarded by __STDC_WANT_DEC_FP__.

gcc/testsuite/
	* gcc.dg/dfp/dec-eval-method.c: Replace decfloat.h with float.h.
	* gcc.dg/dfp/decfloat-constants.c: Ditto.
	* gcc.dg/dfp/convert-dfp.c: Ditto.
	* gcc.dg/dfp/convert-int-saturate.c: Ditto.

From-SVN: r121308