Packed decimal (P) format floating literals are not supported. Feel free to add the code!
The floating point formats generated by directives are these.
.float
Single precision floating point constants.
.double
Double precision floating point constants.
There is no directive to produce regions of memory holding extended precision numbers, however they can be used as immediate operands to floating-point instructions. Adding a directive to create extended precision numbers would not be hard, but it has not yet seemed necessary.