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Can RealView compiler generate SMLAL/UMLAL instructions?

Andrew Queisser

Is there any way the RealView compiler can take advantage of the multiply-and-accumulate instructions of the Cortex M3?

I wrote a simple MAC loop and the compiler didn't generate any SMLAL or UMLAL instructions, which was disappointing.

Thanks,
Andrew Queisser
HP

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  • 0 in reply to Franc Urbanc

    Hi Franc,

    Reading through my messages in this thread I realize I wan't really clear. The vast majority of our code is in C and we only resort to assembly for small time critical chunks, just as you suggest.

    I agree that assembly is hard to maintain although at this point ARM is so prevalent (the last three projects I was on used it) that learning ARM assembly seems to be a good investment.

    Thanks,
    Andrew

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  • 0 in reply to Franc Urbanc

    Hi Franc,

    Reading through my messages in this thread I realize I wan't really clear. The vast majority of our code is in C and we only resort to assembly for small time critical chunks, just as you suggest.

    I agree that assembly is hard to maintain although at this point ARM is so prevalent (the last three projects I was on used it) that learning ARM assembly seems to be a good investment.

    Thanks,
    Andrew

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