* cgen-fpu.h (cgen_fp_ops): Update signatures of floating point

	* cgen-fpu.h (cgen_fp_ops): Update signatures of floating point
	conversion functions.
	* cgen-fpu.cxx (cgen_fp_ops): Ditto.
	* cgen-types (fpconv_kind): New enum.
	* fp.h (enum round_mode_t): Define values in terms of cgen's
	builtin values.

	sh/
	* sh.cxx (sh64_fldi0): Update call to floating point convertion func.
	(sh64_fldi1, sh64_fcnvds, sh64_fcnvsd, sh64_floatld, sh64_floatls,
	sh64_floatqd, sh64_floatqs, sh64_ftrcdl, sh64_ftrcsl, sh64_ftrcdq,
	sh64_ftrcsq, sh64_ftrvs): Ditto.
	* sh2a-fpu-cpu.h, * sh2e-cpu.h, * sh3e-cpu.h, * sh4-cpu.h,
	* sh4a-cpu.h, * sh5-cpu.h: Regenerate.