[EMAIL PROTECTED] writes: > i'm in the process of coding a GCC backend for a certain RISC-like > architecture. > Its register architecture consists of an integer register file (32 regs) and > two > additional hard regs that should be programmer visible. Accesses to these hard > regs are also emitted related to certain RTL patterns (divmoddi4 and > udivmoddi4 > for which these two hard regs should be written). Split 64-bit moves may or > may > not use these regs as well.
Sounds like MIPS. > I thought i had added the necessary information (new register classes, > character > to match for the reg class) however i get the following error message: > > "unable to find a register to spill in class" Note that that error message is very general and can have a number of different underlying causes. > Can i disable filling/spilling for this register class? Sure: make the registers fixed. Or look at how the MIPS port handles HI and LO, with particular reference to mips_secondary_reload_class. Ian
