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Reversing the order of bits in a variable

 
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Bill Legge



Joined: 07 Sep 2010
Posts: 24
Location: West Australia

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Reversing the order of bits in a variable
PostPosted: Mon Oct 18, 2010 10:00 pm     Reply with quote
I'm a few weeks into learning C and think that I'm making a mountain out of a molehill?

The aim is to reverse the order of bits in a variable. I've done it by:
Code:

   int32 x = 0x0; // variable
   int32 y = 0x0; // variable with bits reversed
   int8  z = 0x0; // bit counter
 
    for(z=0;z<=31;z++)
         {
         if(bit_test(x,z)==1) bit_set(y,31-z);
         else bit_clear(y,31-z);
         }


I think there is a better/simpler way to do this. Any advice please.

Regards Bill Legge
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PostPosted: Mon Oct 18, 2010 10:49 pm     Reply with quote
Quote:
The aim is to reverse the order of bits in a variable.

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