[Qemu-devel] [PPC]crnot and crnor

[claude vittoria]

Hi,

I test the PPC fpu with machar test 
(http://orion.math.iastate.edu/burkardt/c_src/machar/machar.html).
I get an error with qemu-cvs :
invalid bits: 00000042 for opcode: 13 - 01 - 01 (4fdef042) 00037e60

ASM code :
00037e54 <__isnan>:
   37e54:       fc 00 04 8e     mffs    f0
   37e58:       ff 00 00 8c     mtfsb0  4*cr6+lt 
   37e5c:       ff 81 08 00     fcmpu   cr7,f1,f1
   37e60:       4f de f0 42     crnot   4*cr7+eq,4*cr7+eq  
<=====================faillure here, crnot bx,by equivalent to crnor bx,by,by
   37e64:       7c 60 00 26     mfcr    r3
   37e68:       54 63 ff fe     rlwinm  r3,r3,31,31,31
   37e6c:       fd fe 05 8e     mtfsf   255,f0
   37e70:       4e 80 00 20     b

I don't understand why the decoding of this instruction fails.
Those seems to be the same error that I reported 1 month ago about crnand and a 
seg fault.

If someone has a clue...

Thanks,
Claude