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Is ARMv7-M3 thumb instructions compatible to ARMv7-A thumb?

Kaiyuan

Hello guys,

I am trying to verify some features of ARMv7-M3 in a software simulator platform for ARM. But this simulator only support ARMv7-A ISA.

Is ARMv7-M3 instructions compatible to ARMv7-A, especially thumb instructions?

Thank you very much.

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    Dear Kaiyuan,

    Cortex-M3 instructions are a subset of arm-v7m instructions. arm-v7m instruction is application level compatiable with arm-v7a. So the following system instrctions are different in cortex-m3: CPS, MRS, MSR.

    All other instructions are compatiable with ARM-V7A.

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    Dear Kaiyuan,

    Cortex-M3 instructions are a subset of arm-v7m instructions. arm-v7m instruction is application level compatiable with arm-v7a. So the following system instrctions are different in cortex-m3: CPS, MRS, MSR.

    All other instructions are compatiable with ARM-V7A.

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