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What's the reason for limiting input size in clAmdFft (clFFT)?

Question asked by cipoint on Feb 7, 2014
Latest reply on Mar 14, 2014 by amd_support

The FFT length in the clFFT library is limited to 2^24 SP and 2^22 DP respectively. What was the reason to do so? I'd like to tackle this in the open source version. But if there's a bigger limitation problem behind this (e.g. due to OpenCL itself), I'd like to know that first.

size_t SP_MAX_LEN = 1 << 24;

size_t DP_MAX_LEN = 1 << 22;