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[Qemu-devel] [PPC]crnot and crnor
From: |
claude vittoria |
Subject: |
[Qemu-devel] [PPC]crnot and crnor |
Date: |
Mon, 31 Dec 2007 09:24:57 +0100 (CET) |
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
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