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The code does exactly what you have written.
In the last iteration, it tries to decrement p_count from 7 to -1, although everything is finished. Instead of decrementing a variable, you may want to calculate the p_count value at the entry of each iteration.
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Hi, thx for reply,
i don't really understand what is your suggestion means...you mean i have to unroll the iteration?
and i think you'er right about the iteration , that after the "last" iteration (i=63), the i continue increasing to 64, like C language or any other program language, but with the entry constrain , the procedure in the iteration shouldn't be executed...
i think i have to loose the constrain of the range of p_count to -1 to 8*8*i_width...
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