QFmode float support missing from optabs?

[Michael Hayes]

Alan Lehotsky writes:
 > 
 > I think it's partly that c4x is using HFmode (two 32 bit
 > bytes), and partly because they've got define_expands for most of
 > the QF mode things.  Including doing libcalls directly in the
 > backend. Maybe Michael Hayes will chime in on this?

No, we use QFmode for floats/doubles and HFmode for long double.

Expanders are used for most patterns to ensure that the operand
combinations are valid.

Michael.