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how to set endianness in ARM Cortex-A8

ranjithkumar ds

Hi,actually i need to run big endian code but i don't know how to set endian option in cp15 registers could any suggest me how to set EE bit set

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  • 0 Arm Employee Badge in reply to Yasuhiko Koumoto
    How do you think about the idea?

    It's a very expensive way of doing it. If you are going to do functions to load single fields from memory then just use little-endian loads and use the "rev" instruction to reverse the result - it's only one additional instruction and much faster (and small enough to be inlined so you avoid the function overhead too).

    It's only worth switching the whole processor data endianness if you are going to load a large block of data, and want to avoid executing hundreds of instructions to reverse the data.

    Pete

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  • 0 Arm Employee Badge in reply to Yasuhiko Koumoto
    How do you think about the idea?

    It's a very expensive way of doing it. If you are going to do functions to load single fields from memory then just use little-endian loads and use the "rev" instruction to reverse the result - it's only one additional instruction and much faster (and small enough to be inlined so you avoid the function overhead too).

    It's only worth switching the whole processor data endianness if you are going to load a large block of data, and want to avoid executing hundreds of instructions to reverse the data.

    Pete

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