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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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  • +1

    You might find this diagram useful.

    Cortex-M Instruction Sets.png

    This shows the different subsets of the Thumb instruction set which are supported by the different members of the Cortex-M family. The smallest subset is support by Cortex-M0 and the largest by Cortex-M4 with FPU extensions. The width of each box shows the size of each instruction - small boxes are 16-bit instructions and large ones are 32-bit.

    Hope this helps.

    Chris

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  • +1

    You might find this diagram useful.

    Cortex-M Instruction Sets.png

    This shows the different subsets of the Thumb instruction set which are supported by the different members of the Cortex-M family. The smallest subset is support by Cortex-M0 and the largest by Cortex-M4 with FPU extensions. The width of each box shows the size of each instruction - small boxes are 16-bit instructions and large ones are 32-bit.

    Hope this helps.

    Chris

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