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Altera_Forum
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11 years ago

How to pad or extend the most significant bit (bit 23) into bits 24 through 31

Hi, As suggested by forumer kflynn (http://www.alteraforum.com/forum/member.php?u=86819) in this link (http://www.alteraforum.com/forum/showthread.php?t=48398), the below issue can be resolved ...
Altera_Forum's avatar
Altera_Forum
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11 years ago

I think that C code should actually be: 


    value = (value & (0x1 << 23)) ?
             value | (0xFF << 24 ) :
             value;

Notice that you are checking bit 23 to see if it is a 1 or a 0 (not bit 24!).