Texas Instruments TMS320C64X - Manual (Page 92)

DSP_maxidx
4-64
Implementation Notes
- Bank Conflicts: No bank conflicts occur.
- Interruptibility: The code is interrupt-tolerant but not interruptible.
- The code is unrolled 16 times to enable the full bandwidth of LDDW and
MAX2 instructions to be utilized. This splits the search into 16 sub-ranges.
The global maximum is then found from the list of maximums of the
sub-ranges. Then, using this offset from the sub-ranges, the global
maximum and the index of it are found using a simple match. For common
maximums in multiple ranges, the index will be different to the above C
code.
- This code requires 40 bytes of stack space for a temporary buffer.
Benchmarks Cycles 5 * nx / 16 + 42
Codesize 388 bytes