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Bitmask question


I have a basic question concerning rotations and bitmasking.

Assume the following code fragement.

uint32 p_lo[] = { 0x00, 0x00};

for (j = 0; j < 64; j++ )

p_lo[0] <<= (j % 32);

p_lo[1] <<= (j % 32);

p_lo[1] |= (p_hi[0] >(32 - (j % 32)));

I itend to do the following. In each iteration shift each element of
the array by an amount of
n. Additionally, the n-bits that are shifted out of each word should
be the least significant bits of the next higher
word. This I try to do by shifting the lower word by 32 - n positions
to the left and OR then the result
with the next higher word. Unfortunately the output does not make

Has anyone an idea what I am missing?

Many thanks,

Jul 19 '07 #1
1 2233
Sorry for the multiple posting, I just figured out that there is
something wrong with the google newsgroup interface. Got access
to a newsserver in the meantime!

Jul 19 '07 #2

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