Messages in this thread | | | Date | Sun, 06 Jan 2002 21:13:52 -0800 (PST) | Subject | Re: results: Remove 8 bytes from struct page on 64bit archs | From | "David S. Miller" <> |
| |
From: Anton Blanchard <anton@samba.org> Date: Mon, 7 Jan 2002 12:25:55 +1100
Perhaps the compiler should be optimising this better (can we replace the divide?)
As mentioned the PPC backend of gcc thinks that divides are cheaper than multiplies. On sparc64 for example we get multiplies by a constant when emitting constant divides.
If you can make the struct a power of two as well as smaller, that would eliminate both problems here but not fix the apparent bug in the PPC backend. - 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/
| |