PR target/67929
	* config/arm/arm.c (vfp3_const_double_for_bits): Rewrite.
	* config/arm/constraints.md (Dp): Update callsite.
	* config/arm/predicates.md (const_double_vcvt_power_of_two): Likewise.

	* gcc.target/arm/pr67929_1.c: New test.

From-SVN: r229436