Texas Instruments TMS320C64X - Manual (Page 77)

DSP_fir_r8
4-49 C64x+ DSPLIB Reference
Implementation Notes
- Bank Conflicts: No bank conflicts occur.
- Interruptibility: The code is interruptible.
- The load double-word instruction is used to simultaneously load four
values in a single clock cycle.
- The inner loop is unrolled 4 times and will always compute a multiple of
4 output samples.
- The outer loop is conditionally executed in parallel with the inner loop. This
allows for a zero overhead outer loop.
Benchmarks Cycles nh*nr/4 + 17
Codesize 336 bytes