Author: Robert Hyatt
Date: 17:50:13 06/20/02
Go up one level in this thread
On June 20, 2002 at 18:49:01, Tom Kerrigan wrote: >On June 20, 2002 at 18:24:14, Robert Hyatt wrote: > >>On June 20, 2002 at 17:58:20, Tom Kerrigan wrote: >> >>>On June 20, 2002 at 17:42:30, Dann Corbit wrote: >>> >>>>Do you imagine that this will settle any argument beyond that particular >>>>CPU/OS/compiler combination? >>>>I don't. >>> >>>Why not? gcc is gcc. The HP-PA is your standard RISC chip. The OS doesn't >>>matter. I don't see why the HP-PA would get more or less of a speedup going to >>>64-bit than a MIPS, UltraSparc, POWER, or any other RISC chip. >>> >>>-Tom >> >> >>Check out the optimizer. It behaves differently for different chips. It >>does some well (intel). It does some horribly (sparc). > >Wouldn't it do consistently well or consistently badly? Then you still know the >relative advantage of the 64 bit datapath. > >-Tom No. In fact, some old GCC versions will break crafty because they don't optimize the long long stuff correctly at all.
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