------- Additional Comments From spop at gcc dot gnu dot org 2009-11-17 17:07
-------
Another pattern that objdump does not get right (probably due to
OP_E_memory again) is:
vfmaddpd %xmm1,(%ecx,%edi),%xmm6,%xmm4
disassembled like this:
0: 67 addr32
1: c4 .byte 0xc4
2: e3 49 jrcxz 0x4d
4: 69 .byte 0x69
5: 24 39 and $0x39,%al
7: 10 .byte 0x10
It seems like the disassembler expects to read one more byte and then
it gets confused, as in the context of another instruction following
it we get:
vfmaddpd %xmm1,(%ecx,%edi),%xmm6,%xmm4
vfmaddpd %xmm1,(%ecx,%edi),%xmm6,%xmm4
disassembled like this:
0: 67 c4 e3 49 69 24 39 10 addr32 vfmaddpd %xmm6,(%esp),%xmm6,%xmm4
8: 67 addr32
9: c4 .byte 0xc4
a: e3 49 jrcxz 0x55
c: 69 .byte 0x69
d: 24 39 and $0x39,%al
f: 10 .byte 0x10
--
http://sourceware.org/bugzilla/show_bug.cgi?id=10973
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