Math: FFT: Move twiddle factors data to DRAM #10457
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This patch moves the twiddle factors tables to sof/src/math/fft/coef directory. The purpose is to make the FFT library more modular. Also there is no usage for the coefficients data beyond local usage by the FFT functions. Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
This patch sets the twiddle factors data as __cold_rodata when MATH_FFT_COLD_TWIDDLE_FACTORS is set to y. The twiddle factors for the maximum FFT size are linked to DRAM and the needed coefficients are copied to SRAM when the FFT plan is initialized. Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
lyakh
reviewed
Dec 24, 2025
| mod_free(mod, plan->tmp_i32[0]); | ||
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| mod_free(mod, plan->bit_reverse_idx); | ||
| mod_free(mod, plan->multi_twiddle); |
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