DSP_fir_cplx
4-39 C64x+ DSPLIB Reference
Special Requirements
-The number of coefficients nh must be a multiple of 2.
-The number of output samples nr must be a multiple of 4.
Implementation Notes
-Bank Conflicts: No bank conflicts occur.
-Interruptibility: The code is interrupt-tolerant but not interruptible.
-The outer loop is unrolled 4 times while the inner loop is not unrolled.
-Both inner and outer loops are collapsed in one loop.
-ADDAH and SUBAH are used along with PACKH2 to perform
accumulation, shift, and data packing.
-Collapsed one stage of epilog and prolog each.
Benchmarks Cycles nr * nh/2 + 7
Codesize 448 bytes