ARM writeback on post-index

[deadeert]

Hello,

I just wonder why post-index for instruction such as LDRD Rd, [Rs], #imm is considered as writeback ?
e0c020d4 ldrd r2, [r0], #4

i=tuple(cs.disasm(b'\xd4\x20\xc0\xe0',0))[0]
i.writeback
True

According to ARM manual it should not be.

[c01dkit]

Hi @deadeert , In your case, Rs will be modified (writeback) after loading 4 bytes Rs+imm. You can refer to the manual here ARM Cortex-M3

[Rot127]

@kabeor Can be closed I guess