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[Default]

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This option specifies the CPU type for the instruction code to be generated.

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When -cpu=rx600 is specified, a relocatable file for the RX600 Series is generated.

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When -cpu=rx200 is specified, a relocatable file for the RX200 Series is generated.

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This option is for compatibility with earlier products.

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For upcoming RX-family MCUs, the isa option will be used instead of the cpu option to select an instruction-set architecture. In developing new applications, use the isa option where possible.

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The cpu option can be replaced by the -isa, -fpu and -nofpu options as follows.

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- -cpu=rx600 ==> -isa=rxv1 -fpu

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- -cpu=rx200 ==> -isa=rxv1 -nofpu

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Suboptions will be added depending on the microcontroller products developed in the future.

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When -cpu=rx200 is specified, the -nofpu option is automatically selected, and writing floating-point operation instructions which are not supported by the RX200 Series or writing FPSW in control registers will cause an error.

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-cpu=rx200 and the -fpu option cannot be specified at the same time.

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When -cpu=rx600 is specified while neither the -nofpu option nor the -fpu option has been specified, the -fpu option is automatically selected.

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Omitting the cpu option will lead to an error if neither the -isa option nor one of the environment variables (CPU_RX or ISA_RX) is specified.

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The -cpu and -isa options cannot be specified at the same time.