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How to distinguish B<c>.W and DSB commands in ARMv7M architecture

Bulent Unalmis

How to distinguish B<c>.W and DSB commands in ARMv7M architecture The B<c>.W and DSB commands are very similar. In a special case of bits in the jump address, however, the Branch command may be exactly the same as the DSB command.

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  • +1

    I found the answer.

    The ARM DDI 0403D document is old, has errors and omissions.
    New document says. If the top 3 bits of the cond bits are 1, then this instruction turns into another command.

    Therefore, if the bits in the Branch command that I suspect belong to the cond are 1110, then this command cannot be the Branch command.

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  • +1

    I found the answer.

    The ARM DDI 0403D document is old, has errors and omissions.
    New document says. If the top 3 bits of the cond bits are 1, then this instruction turns into another command.

    Therefore, if the bits in the Branch command that I suspect belong to the cond are 1110, then this command cannot be the Branch command.

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