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Type: Posts; User: MichaelMeissner

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  1. Yep, but then perhaps we limit progress to what...

    Yep, but then perhaps we limit progress to what the least common denominator can do.

    Perhaps have a build option that fixes the speed (and perhaps does not give easy access to changing it), and...
  2. I've been wondering whether if we give the users...

    I've been wondering whether if we give the users easy methods to change the clock speed, whether F_CPU needs to be a run time variable instead of a constant (and other settings that are set from...
  3. Just in case it isn't clear, GCC can only switch...

    Just in case it isn't clear, GCC can only switch the options used at the function boundary level. So if you have:



    __attribute__((__optimize__("O3,unroll-loops")))
    void fast_inner (...)
    {
    }...
  4. Well it overrides it, but the function switches...

    Well it overrides it, but the function switches of the outer function controls the optimization options. If you don't use always_inline, then a call is done and the outer function has its switches...
  5. I added the original implementation of...

    I added the original implementation of __attribute__ optimize back in the GCC 4.5 time period, along with target support for the x86 at the end of the time I worked for AMD. Later versions of the...
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