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Yiping, Could you describe in a little more detail what your goals are? I agree with Reid and Misha that modifying the instruction definition is usually not advisable but to suggest alternatives, we would need to know more. Also, for some projects it could make sense to change the instruction set. --Vikram http://www.cs.uiuc.edu/~vadve http://llvm.cs.uiuc.edu/ On Oct 20, 2004, at 2:41 PM,

On Wed, Oct 20, 2004 at 11:59:45AM -0700, Yiping Fan wrote: > Yeah. We need to have more extra fields in the instruction. Fo > example, during high-level synthesis, we must schedule an instruction > to a certain control step (or cycle), and bind it to be execute on a > certain functional unit, etc. Since we're talking about "execution" and "scheduling", you

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