I am trying to write a program that either zero extends or sign extends a 16 bit input to a 32 bit output, what exactly is meant by sign extending a number? I believe zero extending would be adding 16 0s in the 16 Most Significant bits, Is sign extending just keeping the most significant bit as the sign?
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Sign-extending means the value of the most significant bit of the 16-bit integer (the sign bit, for signed 16-bit integers) is used to fill the 16 higher bits.
0abcdefghijklmno => 00000000000000000abcdefghijklmno 1abcdefghijklmno => 11111111111111111abcdefghijklmno
This means that if your 16 bits represent a signed integer, your 32-bit …
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