iterators.md (SDF): New mode iterator.

	* gcc/config/arm/iterators.md (SDF): New mode iterator.
	(V_if_elem): Add support for SF and DF modes.
	(V_reg): Likewise.
	(F_constraint): New mode iterator attribute.
	(F_fma_type): Likewise.
	config/arm/vfp.md (fma<SDF:mode>4): New pattern.
	(*fmsub<SDF:mode>4): Likewise.
	(*fmnsub<SDF:mode>4): Likewise.
	(*fmnadd<SDF:mode>4): Likewise.
	* gcc/testsuite/gcc.target/arm/fma-sp.c: New testcase.
	* gcc/testsuite/gcc.target/arm/fma.c: Likewise.
	* gcc/testsuite/gcc.target/arm/fma.h: Likewise.

From-SVN: r189283