These flags are available
as global variables for use in your own C or C++ programs. For example:
#include <dspfns.h> /* include ETSI intrinsics */
#include <stdio.h>
...
const int BUFLEN=255;
int a[BUFLEN], b[BUFLEN], c[BUFLEN];
...
Overflow = 0; /* clear overflow flag */
for (i = 0; i < BUFLEN; ++i) {
c[i] = L_add(a[i], b[i]); /* saturated add of a[i] and b[i] */
}
if (Overflow)
{
fprintf(stderr, "Overflow on saturated addition\n");
}
Generally, saturating functions have a sticky effect on overflow. That is, the overflow
flag remains set until it is explicitly cleared.
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