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Betrayed by a bitfieldBetrayed by a bitfieldPosted Feb 6, 2012 21:11 UTC (Mon) by dlang (✭ supporter ✭, #313)In reply to: Betrayed by a bitfield by chrisV Parent article: Betrayed by a bitfield
32 bit operations are not slower on all 64 bit architectures, including specifically the ia64 architecture where this problem was discovered.
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Betrayed by a bitfield Posted Feb 6, 2012 21:32 UTC (Mon) by chrisV (subscriber, #43417) [Link]
Well that should make it easier to get the gcc developers to deal with the ia64 at least, although I would take a little persuading that moving memory from 64 bit registers into non-64-bit aligned memory locations didn't cause some slow down in code operating in 64 bit mode. Do you have any citations for that?
Betrayed by a bitfield Posted Feb 6, 2012 21:39 UTC (Mon) by dlang (✭ supporter ✭, #313) [Link]
Linus and several others in the kernel thread on the subject have said this.
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