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> The powerpc backend claims to have a fast divide instruction > (via RTX_COST if you care about such things). We'll replace > with shift when dividing by powers of 2, but won't try the > multiply by a constant inverse trick. To follow up: Alan Modra found and fixed the bug, it seems we were only using the optimisation when the arguments were <= 32bit. The target we use is RS64a which has a cost of 60 odd instructions for divide. Anton - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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