[patches] Re: convert jump.c, ifcvt.c, cse.c and simplify-rtx.c to new fp conditionals

[Jan Hubicka]

> The ARM can implement all FP conditions (including unordered) in a single 
> instruction except for LTGT and UNEQ.  IIRC these two form a reversed 
Good.
Does it have instruction for ordered compares (such as LT, GT etc.), that
never trap?
> pair, so we can safely use reverse_condition on any other comparison.  The 
> unhandled comparisons are handled with special branch instructions in the 
> md file which use two conditional branch instructions.  The unhandled 
> cases are never allowed to be used in conditional execution.
I would rather see this moved to generic code - in exapnd_branch we can
easilly break these beasts into primitive ones - this is important bit
for me, since I would like to make fold-const to construct such compares
and thus all backends handle this properly.
> 
> R.