Messages in this thread | | | From | Norbert van Nobelen <> | Subject | Re: What if? | Date | Thu, 2 Dec 2004 07:39:04 +0100 |
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On Thursday 02 December 2004 05:40, Theodore Ts'o wrote: > On Thu, Dec 02, 2004 at 05:34:08AM +0530, Imanpreet Singh Arora wrote: > > I realize most of the unhappiness lies with C++ compilers being > > slow. Also the fact that a lot of Hackers around here are a lot more > > familiar with C, rather than C++. However other than that what are the > > _implementation_ issues that you hackers might need to consider if it > > were to be implemented in C++. > > The suckitude of C++ compilers is only part of the issues. > > > My question is regarding how will kernel > > deal with C++ doing too much behind the back, Calling constructors, > > templates exceptions and other. What are the possible issues of such an > > approach while writing device drivers? What sort of modifications do > > you reckon might be needed if such a move were to be made? > > The way the kernel will deal with C++ language being a complete > disaster (where something as simple as "a = b + c + d +e" could > involve a dozen or more memory allocations, implicit type conversions, > and overloaded operators) is to not use it. Think about the words of > wisdom from the movie Wargames: "The only way to win is not to play > the game".
Let us do it all in assembler. Real optimization for every CPU.
BTW, that sparks a question: Did anybody already do a benchmark to see what happens if you address an AMD cpu not with x86 instructions but with it's native code, so to circumvent the internal translation in the CPU?
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