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>>>>> "MH" == Michael Haubenwallner <haubi@g.o> writes: |
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MH> I've heard a colleague of mine debugged for 50(!) hours after moving |
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MH> some quite old application to some recent Linux before he replaced a |
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MH> memcpy by memmove, so this did ring some bells. |
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MH> However, now he said this was on Ubuntu 10.04.1 LTS, having |
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MH> glibc-2.11, so this might have been unrelated indeed. |
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Check the archives of the glibc lists, as well as its bug db. |
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There has been quite a bit of discussion there on that issue. |
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It was added for sse3 some time ago; I beleive it was Intel engineers |
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who contributed it for sse3, showing that it was inedeed faster on their |
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chips to start at the high point and decrement the counter rather than |
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starting at the low point and incrementing. |
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The discussion in their lists does a better job of documenting the issue. |
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-JimC |
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-- |
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James Cloos <cloos@×××××××.com> OpenPGP: 1024D/ED7DAEA6 |
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