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Extracts and sign-extends

Question asked by bookevg on Nov 5, 2011
Latest reply on Nov 8, 2011 by bookevg

I develop my code for Sharc (ADSP21489). I use 16-bit internal memory for storage of data (signed fixed point) from ADC. Now when I load these data I loose sign bit because most significant bits fill zero. I know that Sharc processor has the instruction (Rn = FEXT Rx BY Ry (SE) or Rn = FEXT Rx BY <bit6>:<len6> (SE)) which can fill most significant bits with sign bit. Do this built-in function exist in C/C++?