Hi all,
I am having some problem while allocating floating point registers in GCC 4.1.1.
As of now my target does not have floating point registers. To support
floating point operations, i added 8 floating point registers that i
want the gcc to allocate only when the mode is MODE_FLOAT.
I have done the following:
1. Defined them in FIXED_REGISTERS, CALL_USED_REGISTERS.
2. Ordered them using REG_ALLOC_ORDER.
3. Created a separate class in enum reg_class (FLOAT).
4. Assigned a specific character to identify the particular class ('f').
5. Defined HARD_REGNO_MODE_OK such that if a float-register is used in
any other mode, it should return 0.
Still while emitting the insns, i get the floating point registers f0
(Reg No 16) in SI mode.
(insn/f 39 38 40 (set:SI (mem:SI (pre_dec:SI (reg/f:SI 15 a7)) [0 S4 A32])
(reg:SI 16 f0)) 0 {movsi_push} (nil)
(nil))
Have i missed out on anything?
Can anyone point out where i am going wrong!!
Thanking you in advance,
Regards,
Rohit
