Cortex M4 and FPU

[0xc0170]

I found out yesterday that Cortex M4 core enables FPU by default.

An example for ARM toolchain

        if   target.core == "Cortex-M0+":
            cpu = "Cortex-M0"
        elif target.core == "Cortex-M4":
            cpu = "Cortex-M4.fp"
        else:
            cpu = target.core

I propose to create two cores Cortex-M4 and Cortex-M4F.
All current targets for M4 will become M4F, and the new one coming K20D5 will be just M4. I'll create a branch for this with a fix.

Regards,
0xc0170

[errordeveloper]

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