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TMS320C6748: 8 bit overflow protection in c6748

AAAA PPPP
Expert 1410 points
Part Number: TMS320C6748

Hello,

Can anyone please brief what is 8 bit overflow protection of tms320c6748 mentioned in page 1 of SPRS590G TMS320C6748™ Fixed- and Floating-Point DSP.

Thanks in advance

With Regards

Shalini

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    TI__Guru 65405 points
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    BR
    Tsvetolin Shulev
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    TI__Guru* 84110 points
    Shalini,

    This refers to an old feature of the C6000 architecture that is rarely used but retained for compatibility. It generally does not apply when you are writing in C since C does not comprehend accumulator overflow, and if you are programming in assembly then you are carefully studying the many instructions and their results in the CPU and Instruction Set Reference Guide.

    There is a specific data format described in the CPU & Instruction Set Reference Guide that uses a 40-bit data word for some math operations, such as ADD. In the Ref Guide, this format is referred to as long, slong, or ulong in the assembly architecture.

    Please refer to the CPU & Instruction Set Reference Guide if you want to understand more about this feature.

    If this or any posts on your threads answer your question, please do the community the favor of marking that post as Verified Answer so future readers will know the thread is complete and which post to look to for the answer. If any of your open threads are answered, please make that mark for those, also.

    Regards,
    RandyP