Texas Instruments TMS320C64X manual DSPmaxval, Maximum Value of Vector

DSP_maxval

DSP_maxval	Maximum Value of Vector
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

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