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DSP_maxval
4-62
Maximum Value of Vector
DSP_maxval
Function short DSP_maxval (const short *x, int nx)
Arguments x[nx] Pointer to input vector of size nx.
nx Length of input data vector. Must be multiple of 8 and ≥32.
return short Maximum value of a vector.
Description This routine finds the element with maximum value in the input vector and
returns that value.
Algorithm This is the C equivalent of the assembly code without restrictions. Note that
the assembly code is hand optimized and restrictions may apply.
short DSP_maxval(short x[ ], int nx)
{
int i, max;
max = −32768;
for (i = 0; i < nx; i++)
if (x[i] > max)
max = x[i];
return max;
}
Special Requirements nx is a multiple of 8 and greater than or equal to 32.
Implementation Notes
- Bank Conflicts: No bank conflicts occur.
- Interruptibility: The code is interrupt-tolerant but not interruptible.
Benchmarks Cycles nx / 4 + 10
Codesize 116 bytes