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Altera_Forum's avatar
Altera_Forum
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11 years ago

Excessive logic utilization from memmove

The following code is similar to a memmove() operation. This code results in a significant increase in logic utilization. The 'rep' member on the struct is defined as an unsigned char. Is there a ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Good idea. However, a circular buffer will not work since I'm storing bignums in the array and need to do left/right shift operations over the entire bignum. I've changed the logic to the following by allocating additional memory on both sides of the bignum. This code requires much fewer resources on the FPGA. But this approach requires changes to my left/right shift operations, which are not consuming more resources. Joy.

void expand( struct number *h ){

h->size++;

h->msb--;

h->rep[h->msb] = 0x01;

}