Based on a recent post here, it looks like the new Linux compiler uses the x87 unit for floating point. Naturally this won't perform well. If it is true.

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Based on a recent post here, it looks like the new Linux compiler uses the x87 unit for floating point. Naturally this won't perform well. If it is true.

I don't have the compiler. Can anyone confirm or refute this?

Comments

  1. Rudy VelthuisJuly 31, 2018 at 3:22 PM

    David Heffernan Excuses? I am just reporting what I see. That is an LLVM compiler, right? I have no idea how it comes to such poor code generation. I can‘t currently test Clang, so I‘ll have to believe you.

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  2. Rudy VelthuisJuly 31, 2018 at 3:23 PM

    David Heffernan FWIW the Linux compiler using the FPU is indeed very weird, on a 64 bit platform. I can only hope it gets better in future versions.

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  3. David HeffernanJuly 31, 2018 at 9:04 PM

    Rudy Velthuis Godbolt lets you explore other compilers easily. It's amazing how good some of the other compilers are.

    ReplyDelete

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