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On 30/07/12 19:40, Alecks Gates wrote: |
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> What are the benefits and drawbacks of using the x32 ABI |
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|
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Benefits: An x32 application is limited to a 32-bit address range but |
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runs in 64-bit CPU mode. The intent is to not waste any memory, but be |
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as fast as any other 64-bit application. |
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|
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Drawbacks: Don't expect to get a fully working system. Many |
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applications will either not build, or break at runtime when compiled in |
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this mode. Also, some application will run slower because they come |
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with hand coded assembly routines for x86 and x86-64, but not for x32. |
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That means that generic C code paths will be used for x32, and they're |
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slower compared to the hand optimized assembly routines. |
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|
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Also note that x32 is not compatible with 32-bit applications. If you |
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build an x86-64/x32 system, you lose the x86/x86-64 multilib capability |
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unless there's a way to have a three-way multilib Gentoo with |
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x86/x32/x86-64. |
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