Messages in this thread | | | Date | Sun, 6 Jan 2002 19:22:04 -0800 | From | Richard Henderson <> | Subject | Re: results: Remove 8 bytes from struct page on 64bit archs |
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On Mon, Jan 07, 2002 at 12:25:55PM +1100, Anton Blanchard wrote: > li 11,120 ; sizeof(struct page) [...] > divd 0,0,11 > > Perhaps the compiler should be optimising this better (can we replace > the divide?)
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.
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