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Subject: Re: [boost] [fixed_point] Request for interest in a binary fixed point library
From: Christopher Kormanyos (e_float_at_[hidden])
Date: 2012-04-17 19:39:42

>>> Do you expect this to work in the closed fixed point-world >>>    fixed_point<4, -14>  result2 = pi_rep<2, -8>() * pi_rep<2, -6>(); >> I do. Others might not. > So you don't expect the preceding to work >  fixed_point<4, -14>  result2 = pi_rep<2, -8>() * pi_rep<2, -6>(); Thank you for the careful reading, Vicente. I was going too fast and did not see the different bits in pi_rep(). No, I don't expect it to work. I don't even want it to. Others might expect it to work. > Thanks for all your comments that encourage myself to try to make > a better library. Even if at some points in time it could seem that the > library could be to complex and that I'm building a cathedral I hope > at the end of the walk it will easy of use and efficient. > Best, Vicnte We, in the community, don't have any clearly specified fixed-point implementation. This forces everyone to "roll-their-own", as was posted previously. I believe that we definitely need that solid *first implementation*. You know, the C language actually has a spec for a <7, -23> fixed-point. I use this on Atmel(R) AVR(R) 8-bit processors. Hardly anyone actually knows about it. Maybe you want to consider C-compatibility. (I don't care about C-compatibility, others might). It is here: "ISO/IEC TR 18037, Programming languages --- C --- Extensions to support embedded processors" Best regards, Chris.

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