📄 ffft.s
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;-----------------------------------------------------------------------------;
; Fixed-point FFT routines for megaAVRs (C)ChaN, 2005
;-----------------------------------------------------------------------------;
;
; void fft_input (const int16_t *array_src, complex_t *array_bfly);
; void fft_execute (complex_t *array_bfly);
; void fft_output (complex_t *array_bfly, uint16_t *array_dst);
;
; <array_src>: Wave form to be processed.
; <array_bfly>: Complex array for butterfly operations.
; <array_dst>: Spectrum output buffer.
;
; These functions must be called in sequence to do a DFT in FFT algorithm.
; fft_input() fills the complex array with a wave form to prepare butterfly
; operations. A hamming window is applied at the same time.
; fft_execute() executes the butterfly operations.
; fft_output() re-orders the results, converts the complex spectrum into
; scalar spectrum and output it in linear scale.
;
; The number of points FFT_N is defined in "ffft.h" and the value can be 64,
; 128, 256 or 512.
;
;----------------------------------------------------------------------------;
; 16bit fixed-point FFT performance with a MegaAVR @16MHz (measured)
;
; Points: Input, Execute, Output, Total: Throughput
; 64pts: .17ms, 2.0ms, 1.2ms, 3.4ms: 19.0kpps
; 128pts: .33ms, 4.6ms, 2.4ms, 7.3ms: 17.5kpps
; 256pts: .66ms, 10.4ms, 4.9ms, 15.9ms: 16.1kpps
; 512pts: 1.3ms, 23.2ms, 9.7ms, 34.2ms: 14.9kpps
; 1024pts: <undefined>
;----------------------------------------------------------------------------;
.nolist
#define FFFT_ASM
#include "ffft.h"
.list
#if FFT_N == 512
#define FFT_B 9
#elif FFT_N == 256
#define FFT_B 8
#elif FFT_N == 128
#define FFT_B 7
#elif FFT_N == 64
#define FFT_B 6
#else
#error FFT_N must be 64,128,256 or 512.
#endif
;----------------------------------------------------------------------------;
; Constant Tables
.global tbl_window
tbl_window: ; tbl_window[] = ... (This is a Hamming window)
#if FFT_N == 512
.dc.w 2621, 2622, 2625, 2631, 2639, 2649, 2662, 2676, 2693, 2713, 2734, 2758, 2784, 2812, 2843, 2876
.dc.w 2910, 2948, 2987, 3029, 3073, 3119, 3167, 3217, 3270, 3325, 3382, 3441, 3502, 3565, 3631, 3698
.dc.w 3768, 3840, 3914, 3990, 4068, 4148, 4230, 4314, 4401, 4489, 4579, 4671, 4765, 4861, 4959, 5059
.dc.w 5161, 5265, 5370, 5478, 5587, 5698, 5811, 5926, 6042, 6160, 6280, 6402, 6525, 6651, 6777, 6906
.dc.w 7036, 7167, 7300, 7435, 7571, 7709, 7849, 7989, 8132, 8275, 8420, 8567, 8715, 8864, 9015, 9166
.dc.w 9320, 9474, 9630, 9787, 9945, 10104, 10264, 10426, 10588, 10752, 10917, 11082, 11249, 11417, 11586, 11755
.dc.w 11926, 12097, 12269, 12442, 12616, 12790, 12966, 13142, 13318, 13496, 13674, 13852, 14031, 14211, 14391, 14572
.dc.w 14753, 14935, 15117, 15299, 15482, 15665, 15849, 16032, 16216, 16400, 16585, 16769, 16954, 17139, 17324, 17509
.dc.w 17694, 17879, 18064, 18248, 18433, 18618, 18802, 18987, 19171, 19355, 19539, 19722, 19905, 20088, 20271, 20453
.dc.w 20634, 20815, 20996, 21176, 21356, 21535, 21714, 21892, 22069, 22246, 22422, 22597, 22772, 22945, 23118, 23290
.dc.w 23462, 23632, 23802, 23970, 24138, 24305, 24471, 24635, 24799, 24962, 25123, 25283, 25443, 25601, 25758, 25913
.dc.w 26068, 26221, 26373, 26523, 26673, 26820, 26967, 27112, 27256, 27398, 27539, 27678, 27816, 27952, 28087, 28220
.dc.w 28352, 28482, 28610, 28737, 28862, 28985, 29107, 29227, 29345, 29462, 29576, 29689, 29800, 29910, 30017, 30123
.dc.w 30226, 30328, 30428, 30526, 30622, 30716, 30808, 30899, 30987, 31073, 31157, 31239, 31319, 31397, 31473, 31547
.dc.w 31619, 31689, 31756, 31822, 31885, 31947, 32006, 32063, 32117, 32170, 32220, 32269, 32315, 32359, 32400, 32440
.dc.w 32477, 32512, 32545, 32575, 32603, 32629, 32653, 32675, 32694, 32711, 32726, 32738, 32748, 32756, 32762, 32765
.dc.w 32766, 32765, 32762, 32756, 32748, 32738, 32726, 32711, 32694, 32675, 32653, 32629, 32603, 32575, 32545, 32512
.dc.w 32477, 32440, 32400, 32359, 32315, 32269, 32221, 32170, 32117, 32063, 32006, 31947, 31885, 31822, 31757, 31689
.dc.w 31619, 31547, 31473, 31397, 31319, 31239, 31157, 31073, 30987, 30899, 30808, 30716, 30622, 30526, 30428, 30328
.dc.w 30226, 30123, 30017, 29910, 29800, 29689, 29576, 29462, 29345, 29227, 29107, 28985, 28862, 28737, 28610, 28482
.dc.w 28352, 28220, 28087, 27952, 27816, 27678, 27539, 27398, 27256, 27112, 26967, 26820, 26673, 26523, 26373, 26221
.dc.w 26068, 25913, 25758, 25601, 25443, 25283, 25123, 24962, 24799, 24635, 24471, 24305, 24138, 23970, 23802, 23632
.dc.w 23462, 23291, 23118, 22945, 22772, 22597, 22422, 22246, 22069, 21892, 21714, 21535, 21356, 21176, 20996, 20815
.dc.w 20634, 20453, 20271, 20088, 19905, 19722, 19539, 19355, 19171, 18987, 18803, 18618, 18433, 18249, 18064, 17879
.dc.w 17694, 17509, 17324, 17139, 16954, 16769, 16585, 16401, 16216, 16032, 15849, 15665, 15482, 15299, 15117, 14935
.dc.w 14753, 14572, 14391, 14211, 14031, 13852, 13674, 13496, 13318, 13142, 12966, 12790, 12616, 12442, 12269, 12097
.dc.w 11926, 11755, 11586, 11417, 11249, 11083, 10917, 10752, 10588, 10426, 10264, 10104, 9945, 9787, 9630, 9474
.dc.w 9320, 9167, 9015, 8864, 8715, 8567, 8420, 8275, 8132, 7989, 7849, 7709, 7571, 7435, 7300, 7167
.dc.w 7036, 6906, 6777, 6651, 6526, 6402, 6280, 6160, 6042, 5926, 5811, 5698, 5587, 5478, 5370, 5265
.dc.w 5161, 5059, 4959, 4861, 4765, 4671, 4579, 4489, 4401, 4314, 4230, 4148, 4068, 3990, 3914, 3840
.dc.w 3768, 3699, 3631, 3565, 3502, 3441, 3382, 3325, 3270, 3217, 3167, 3119, 3073, 3029, 2987, 2948
.dc.w 2910, 2876, 2843, 2812, 2784, 2758, 2734, 2713, 2693, 2676, 2662, 2649, 2639, 2631, 2625, 2622
#elif FFT_N == 256
.dc.w 2621, 2625, 2639, 2662, 2693, 2734, 2784, 2843, 2910, 2987, 3073, 3167, 3270, 3382, 3502, 3631
.dc.w 3768, 3914, 4068, 4230, 4401, 4579, 4765, 4959, 5161, 5370, 5587, 5811, 6042, 6280, 6525, 6777
.dc.w 7036, 7300, 7571, 7849, 8132, 8420, 8715, 9015, 9320, 9630, 9945, 10264, 10588, 10917, 11249, 11586
.dc.w 11926, 12269, 12616, 12966, 13318, 13674, 14031, 14391, 14753, 15117, 15482, 15849, 16216, 16585, 16954, 17324
.dc.w 17694, 18064, 18433, 18802, 19171, 19539, 19905, 20271, 20634, 20996, 21356, 21714, 22069, 22422, 22772, 23118
.dc.w 23462, 23802, 24138, 24471, 24799, 25123, 25443, 25758, 26068, 26373, 26673, 26967, 27256, 27539, 27816, 28087
.dc.w 28352, 28610, 28862, 29107, 29345, 29576, 29800, 30017, 30226, 30428, 30622, 30808, 30987, 31157, 31319, 31473
.dc.w 31619, 31756, 31885, 32006, 32117, 32220, 32315, 32400, 32477, 32545, 32603, 32653, 32694, 32726, 32748, 32762
.dc.w 32766, 32762, 32748, 32726, 32694, 32653, 32603, 32545, 32477, 32400, 32315, 32221, 32117, 32006, 31885, 31757
.dc.w 31619, 31473, 31319, 31157, 30987, 30808, 30622, 30428, 30226, 30017, 29800, 29576, 29345, 29107, 28862, 28610
.dc.w 28352, 28087, 27816, 27539, 27256, 26967, 26673, 26373, 26068, 25758, 25443, 25123, 24799, 24471, 24138, 23802
.dc.w 23462, 23118, 22772, 22422, 22069, 21714, 21356, 20996, 20634, 20271, 19905, 19539, 19171, 18803, 18433, 18064
.dc.w 17694, 17324, 16954, 16585, 16216, 15849, 15482, 15117, 14753, 14391, 14031, 13674, 13318, 12966, 12616, 12269
.dc.w 11926, 11586, 11249, 10917, 10588, 10264, 9945, 9630, 9320, 9015, 8715, 8420, 8132, 7849, 7571, 7300
.dc.w 7036, 6777, 6526, 6280, 6042, 5811, 5587, 5370, 5161, 4959, 4765, 4579, 4401, 4230, 4068, 3914
.dc.w 3768, 3631, 3502, 3382, 3270, 3167, 3073, 2987, 2910, 2843, 2784, 2734, 2693, 2662, 2639, 2625
#elif FFT_N == 128
.dc.w 2621, 2639, 2693, 2784, 2910, 3073, 3270, 3502, 3768, 4068, 4401, 4765, 5161, 5587, 6042, 6525
.dc.w 7036, 7571, 8132, 8715, 9320, 9945, 10588, 11249, 11926, 12616, 13318, 14031, 14753, 15482, 16216, 16954
.dc.w 17694, 18433, 19171, 19905, 20634, 21356, 22069, 22772, 23462, 24138, 24799, 25443, 26068, 26673, 27256, 27816
.dc.w 28352, 28862, 29345, 29800, 30226, 30622, 30987, 31319, 31619, 31885, 32117, 32315, 32477, 32603, 32694, 32748
.dc.w 32766, 32748, 32694, 32603, 32477, 32315, 32117, 31885, 31619, 31319, 30987, 30622, 30226, 29800, 29345, 28862
.dc.w 28352, 27816, 27256, 26673, 26068, 25443, 24799, 24138, 23462, 22772, 22069, 21356, 20634, 19905, 19171, 18433
.dc.w 17694, 16954, 16216, 15482, 14753, 14031, 13318, 12616, 11926, 11249, 10588, 9945, 9320, 8715, 8132, 7571
.dc.w 7036, 6526, 6042, 5587, 5161, 4765, 4401, 4068, 3768, 3502, 3270, 3073, 2910, 2784, 2693, 2639
#elif FFT_N == 64
.dc.w 2621, 2693, 2910, 3270, 3768, 4401, 5161, 6042, 7036, 8132, 9320, 10588, 11926, 13318, 14753, 16216
.dc.w 17694, 19171, 20634, 22069, 23462, 24799, 26068, 27256, 28352, 29345, 30226, 30987, 31619, 32117, 32477, 32694
.dc.w 32766, 32694, 32477, 32117, 31619, 30987, 30226, 29345, 28352, 27256, 26068, 24799, 23462, 22069, 20634, 19171
.dc.w 17694, 16216, 14753, 13318, 11926, 10588, 9320, 8132, 7036, 6042, 5161, 4401, 3768, 3270, 2910, 2693
#endif
tbl_cos_sin: ; Table of {cos(x),sin(x)}, (0 <= x < pi, in FFT_N/2 steps)
#if FFT_N == 512
.dc.w 32767, 0, 32764, 402, 32757, 804, 32744, 1206, 32727, 1607, 32705, 2009, 32678, 2410, 32646, 2811
.dc.w 32609, 3211, 32567, 3611, 32520, 4011, 32468, 4409, 32412, 4807, 32350, 5205, 32284, 5601, 32213, 5997
.dc.w 32137, 6392, 32056, 6786, 31970, 7179, 31880, 7571, 31785, 7961, 31684, 8351, 31580, 8739, 31470, 9126
.dc.w 31356, 9511, 31236, 9895, 31113, 10278, 30984, 10659, 30851, 11038, 30713, 11416, 30571, 11792, 30424, 12166
.dc.w 30272, 12539, 30116, 12909, 29955, 13278, 29790, 13645, 29621, 14009, 29446, 14372, 29268, 14732, 29085, 15090
.dc.w 28897, 15446, 28706, 15799, 28510, 16150, 28309, 16499, 28105, 16845, 27896, 17189, 27683, 17530, 27466, 17868
.dc.w 27244, 18204, 27019, 18537, 26789, 18867, 26556, 19194, 26318, 19519, 26077, 19840, 25831, 20159, 25582, 20474
.dc.w 25329, 20787, 25072, 21096, 24811, 21402, 24546, 21705, 24278, 22004, 24006, 22301, 23731, 22594, 23452, 22883
.dc.w 23169, 23169, 22883, 23452, 22594, 23731, 22301, 24006, 22004, 24278, 21705, 24546, 21402, 24811, 21096, 25072
.dc.w 20787, 25329, 20474, 25582, 20159, 25831, 19840, 26077, 19519, 26318, 19194, 26556, 18867, 26789, 18537, 27019
.dc.w 18204, 27244, 17868, 27466, 17530, 27683, 17189, 27896, 16845, 28105, 16499, 28309, 16150, 28510, 15799, 28706
.dc.w 15446, 28897, 15090, 29085, 14732, 29268, 14372, 29446, 14009, 29621, 13645, 29790, 13278, 29955, 12909, 30116
.dc.w 12539, 30272, 12166, 30424, 11792, 30571, 11416, 30713, 11038, 30851, 10659, 30984, 10278, 31113, 9895, 31236
.dc.w 9511, 31356, 9126, 31470, 8739, 31580, 8351, 31684, 7961, 31785, 7571, 31880, 7179, 31970, 6786, 32056
.dc.w 6392, 32137, 5997, 32213, 5601, 32284, 5205, 32350, 4807, 32412, 4409, 32468, 4011, 32520, 3611, 32567
.dc.w 3211, 32609, 2811, 32646, 2410, 32678, 2009, 32705, 1607, 32727, 1206, 32744, 804, 32757, 402, 32764
.dc.w 0, 32766, -402, 32764, -804, 32757, -1206, 32744, -1607, 32727, -2009, 32705, -2410, 32678, -2811, 32646
.dc.w -3211, 32609, -3611, 32567, -4010, 32520, -4409, 32468, -4807, 32412, -5205, 32350, -5601, 32284, -5997, 32213
.dc.w -6392, 32137, -6786, 32056, -7179, 31970, -7571, 31880, -7961, 31785, -8351, 31684, -8739, 31580, -9126, 31470
.dc.w -9511, 31356, -9895, 31236, -10278, 31113, -10659, 30984, -11038, 30851, -11416, 30713, -11792, 30571, -12166, 30424
.dc.w -12539, 30272, -12909, 30116, -13278, 29955, -13645, 29790, -14009, 29621, -14372, 29446, -14732, 29268, -15090, 29085
.dc.w -15446, 28897, -15799, 28706, -16150, 28510, -16499, 28309, -16845, 28105, -17189, 27896, -17530, 27683, -17868, 27466
.dc.w -18204, 27244, -18537, 27019, -18867, 26789, -19194, 26556, -19519, 26318, -19840, 26077, -20159, 25831, -20474, 25582
.dc.w -20787, 25329, -21096, 25072, -21402, 24811, -21705, 24546, -22004, 24278, -22301, 24006, -22594, 23731, -22883, 23452
.dc.w -23169, 23169, -23452, 22883, -23731, 22594, -24006, 22301, -24278, 22005, -24546, 21705, -24811, 21402, -25072, 21096
.dc.w -25329, 20787, -25582, 20474, -25831, 20159, -26077, 19840, -26318, 19519, -26556, 19194, -26789, 18867, -27019, 18537
.dc.w -27244, 18204, -27466, 17868, -27683, 17530, -27896, 17189, -28105, 16845, -28309, 16499, -28510, 16150, -28706, 15799
.dc.w -28897, 15446, -29085, 15090, -29268, 14732, -29446, 14372, -29620, 14009, -29790, 13645, -29955, 13278, -30116, 12910
.dc.w -30272, 12539, -30424, 12167, -30571, 11792, -30713, 11416, -30851, 11038, -30984, 10659, -31113, 10278, -31236, 9895
.dc.w -31356, 9511, -31470, 9126, -31580, 8739, -31684, 8351, -31784, 7961, -31880, 7571, -31970, 7179, -32056, 6786
.dc.w -32137, 6392, -32213, 5997, -32284, 5601, -32350, 5205, -32412, 4807, -32468, 4409, -32520, 4011, -32567, 3611
.dc.w -32609, 3211, -32646, 2811, -32678, 2410, -32705, 2009, -32727, 1607, -32744, 1206, -32757, 804, -32764, 402
#elif FFT_N == 256
.dc.w 32767, 0, 32757, 804, 32727, 1607, 32678, 2410, 32609, 3211, 32520, 4011, 32412, 4807, 32284, 5601
.dc.w 32137, 6392, 31970, 7179, 31785, 7961, 31580, 8739, 31356, 9511, 31113, 10278, 30851, 11038, 30571, 11792
.dc.w 30272, 12539, 29955, 13278, 29621, 14009, 29268, 14732, 28897, 15446, 28510, 16150, 28105, 16845, 27683, 17530
.dc.w 27244, 18204, 26789, 18867, 26318, 19519, 25831, 20159, 25329, 20787, 24811, 21402, 24278, 22004, 23731, 22594
.dc.w 23169, 23169, 22594, 23731, 22004, 24278, 21402, 24811, 20787, 25329, 20159, 25831, 19519, 26318, 18867, 26789
.dc.w 18204, 27244, 17530, 27683, 16845, 28105, 16150, 28510, 15446, 28897, 14732, 29268, 14009, 29621, 13278, 29955
.dc.w 12539, 30272, 11792, 30571, 11038, 30851, 10278, 31113, 9511, 31356, 8739, 31580, 7961, 31785, 7179, 31970
.dc.w 6392, 32137, 5601, 32284, 4807, 32412, 4011, 32520, 3211, 32609, 2410, 32678, 1607, 32727, 804, 32757
.dc.w 0, 32766, -804, 32757, -1607, 32727, -2410, 32678, -3211, 32609, -4010, 32520, -4807, 32412, -5601, 32284
.dc.w -6392, 32137, -7179, 31970, -7961, 31785, -8739, 31580, -9511, 31356, -10278, 31113, -11038, 30851, -11792, 30571
.dc.w -12539, 30272, -13278, 29955, -14009, 29621, -14732, 29268, -15446, 28897, -16150, 28510, -16845, 28105, -17530, 27683
.dc.w -18204, 27244, -18867, 26789, -19519, 26318, -20159, 25831, -20787, 25329, -21402, 24811, -22004, 24278, -22594, 23731
.dc.w -23169, 23169, -23731, 22594, -24278, 22005, -24811, 21402, -25329, 20787, -25831, 20159, -26318, 19519, -26789, 18867
.dc.w -27244, 18204, -27683, 17530, -28105, 16845, -28510, 16150, -28897, 15446, -29268, 14732, -29620, 14009, -29955, 13278
.dc.w -30272, 12539, -30571, 11792, -30851, 11038, -31113, 10278, -31356, 9511, -31580, 8739, -31784, 7961, -31970, 7179
.dc.w -32137, 6392, -32284, 5601, -32412, 4807, -32520, 4011, -32609, 3211, -32678, 2410, -32727, 1607, -32757, 804
#elif FFT_N == 128
.dc.w 32767, 0, 32727, 1607, 32609, 3211, 32412, 4807, 32137, 6392, 31785, 7961, 31356, 9511, 30851, 11038
.dc.w 30272, 12539, 29621, 14009, 28897, 15446, 28105, 16845, 27244, 18204, 26318, 19519, 25329, 20787, 24278, 22004
.dc.w 23169, 23169, 22004, 24278, 20787, 25329, 19519, 26318, 18204, 27244, 16845, 28105, 15446, 28897, 14009, 29621
.dc.w 12539, 30272, 11038, 30851, 9511, 31356, 7961, 31785, 6392, 32137, 4807, 32412, 3211, 32609, 1607, 32727
.dc.w 0, 32766, -1607, 32727, -3211, 32609, -4807, 32412, -6392, 32137, -7961, 31785, -9511, 31356, -11038, 30851
.dc.w -12539, 30272, -14009, 29621, -15446, 28897, -16845, 28105, -18204, 27244, -19519, 26318, -20787, 25329, -22004, 24278
.dc.w -23169, 23169, -24278, 22005, -25329, 20787, -26318, 19519, -27244, 18204, -28105, 16845, -28897, 15446, -29620, 14009
.dc.w -30272, 12539, -30851, 11038, -31356, 9511, -31784, 7961, -32137, 6392, -32412, 4807, -32609, 3211, -32727, 1607
#elif FFT_N == 64
.dc.w 32767, 0, 32609, 3211, 32137, 6392, 31356, 9511, 30272, 12539, 28897, 15446, 27244, 18204, 25329, 20787
.dc.w 23169, 23169, 20787, 25329, 18204, 27244, 15446, 28897, 12539, 30272, 9511, 31356, 6392, 32137, 3211, 32609
.dc.w 0, 32766, -3211, 32609, -6392, 32137, -9511, 31356, -12539, 30272, -15446, 28897, -18204, 27244, -20787, 25329
.dc.w -23169, 23169, -25329, 20787, -27244, 18204, -28897, 15446, -30272, 12539, -31356, 9511, -32137, 6392, -32609, 3211
#endif
tbl_bitrev: ; tbl_bitrev[] = ...
#if FFT_N == 512
#ifdef INPUT_IQ
.dc.w 1*4, 257*4, 129*4, 385*4, 65*4, 321*4, 193*4, 449*4, 33*4, 289*4, 161*4, 417*4, 97*4, 353*4, 225*4, 481*4
.dc.w 17*4, 273*4, 145*4, 401*4, 81*4, 337*4, 209*4, 465*4, 49*4, 305*4, 177*4, 433*4, 113*4, 369*4, 241*4, 497*4
.dc.w 9*4, 265*4, 137*4, 393*4, 73*4, 329*4, 201*4, 457*4, 41*4, 297*4, 169*4, 425*4, 105*4, 361*4, 233*4, 489*4
.dc.w 25*4, 281*4, 153*4, 409*4, 89*4, 345*4, 217*4, 473*4, 57*4, 313*4, 185*4, 441*4, 121*4, 377*4, 249*4, 505*4
.dc.w 5*4, 261*4, 133*4, 389*4, 69*4, 325*4, 197*4, 453*4, 37*4, 293*4, 165*4, 421*4, 101*4, 357*4, 229*4, 485*4
.dc.w 21*4, 277*4, 149*4, 405*4, 85*4, 341*4, 213*4, 469*4, 53*4, 309*4, 181*4, 437*4, 117*4, 373*4, 245*4, 501*4
.dc.w 13*4, 269*4, 141*4, 397*4, 77*4, 333*4, 205*4, 461*4, 45*4, 301*4, 173*4, 429*4, 109*4, 365*4, 237*4, 493*4
.dc.w 29*4, 285*4, 157*4, 413*4, 93*4, 349*4, 221*4, 477*4, 61*4, 317*4, 189*4, 445*4, 125*4, 381*4, 253*4, 509*4
.dc.w 3*4, 259*4, 131*4, 387*4, 67*4, 323*4, 195*4, 451*4, 35*4, 291*4, 163*4, 419*4, 99*4, 355*4, 227*4, 483*4
.dc.w 19*4, 275*4, 147*4, 403*4, 83*4, 339*4, 211*4, 467*4, 51*4, 307*4, 179*4, 435*4, 115*4, 371*4, 243*4, 499*4
.dc.w 11*4, 267*4, 139*4, 395*4, 75*4, 331*4, 203*4, 459*4, 43*4, 299*4, 171*4, 427*4, 107*4, 363*4, 235*4, 491*4
.dc.w 27*4, 283*4, 155*4, 411*4, 91*4, 347*4, 219*4, 475*4, 59*4, 315*4, 187*4, 443*4, 123*4, 379*4, 251*4, 507*4
.dc.w 7*4, 263*4, 135*4, 391*4, 71*4, 327*4, 199*4, 455*4, 39*4, 295*4, 167*4, 423*4, 103*4, 359*4, 231*4, 487*4
.dc.w 23*4, 279*4, 151*4, 407*4, 87*4, 343*4, 215*4, 471*4, 55*4, 311*4, 183*4, 439*4, 119*4, 375*4, 247*4, 503*4
.dc.w 15*4, 271*4, 143*4, 399*4, 79*4, 335*4, 207*4, 463*4, 47*4, 303*4, 175*4, 431*4, 111*4, 367*4, 239*4, 495*4
.dc.w 31*4, 287*4, 159*4, 415*4, 95*4, 351*4, 223*4, 479*4, 63*4, 319*4, 191*4, 447*4, 127*4, 383*4, 255*4, 511*4
#endif
.dc.w 0*4, 256*4, 128*4, 384*4, 64*4, 320*4, 192*4, 448*4, 32*4, 288*4, 160*4, 416*4, 96*4, 352*4, 224*4, 480*4
.dc.w 16*4, 272*4, 144*4, 400*4, 80*4, 336*4, 208*4, 464*4, 48*4, 304*4, 176*4, 432*4, 112*4, 368*4, 240*4, 496*4
.dc.w 8*4, 264*4, 136*4, 392*4, 72*4, 328*4, 200*4, 456*4, 40*4, 296*4, 168*4, 424*4, 104*4, 360*4, 232*4, 488*4
.dc.w 24*4, 280*4, 152*4, 408*4, 88*4, 344*4, 216*4, 472*4, 56*4, 312*4, 184*4, 440*4, 120*4, 376*4, 248*4, 504*4
.dc.w 4*4, 260*4, 132*4, 388*4, 68*4, 324*4, 196*4, 452*4, 36*4, 292*4, 164*4, 420*4, 100*4, 356*4, 228*4, 484*4
.dc.w 20*4, 276*4, 148*4, 404*4, 84*4, 340*4, 212*4, 468*4, 52*4, 308*4, 180*4, 436*4, 116*4, 372*4, 244*4, 500*4
.dc.w 12*4, 268*4, 140*4, 396*4, 76*4, 332*4, 204*4, 460*4, 44*4, 300*4, 172*4, 428*4, 108*4, 364*4, 236*4, 492*4
.dc.w 28*4, 284*4, 156*4, 412*4, 92*4, 348*4, 220*4, 476*4, 60*4, 316*4, 188*4, 444*4, 124*4, 380*4, 252*4, 508*4
.dc.w 2*4, 258*4, 130*4, 386*4, 66*4, 322*4, 194*4, 450*4, 34*4, 290*4, 162*4, 418*4, 98*4, 354*4, 226*4, 482*4
.dc.w 18*4, 274*4, 146*4, 402*4, 82*4, 338*4, 210*4, 466*4, 50*4, 306*4, 178*4, 434*4, 114*4, 370*4, 242*4, 498*4
.dc.w 10*4, 266*4, 138*4, 394*4, 74*4, 330*4, 202*4, 458*4, 42*4, 298*4, 170*4, 426*4, 106*4, 362*4, 234*4, 490*4
.dc.w 26*4, 282*4, 154*4, 410*4, 90*4, 346*4, 218*4, 474*4, 58*4, 314*4, 186*4, 442*4, 122*4, 378*4, 250*4, 506*4
.dc.w 6*4, 262*4, 134*4, 390*4, 70*4, 326*4, 198*4, 454*4, 38*4, 294*4, 166*4, 422*4, 102*4, 358*4, 230*4, 486*4
.dc.w 22*4, 278*4, 150*4, 406*4, 86*4, 342*4, 214*4, 470*4, 54*4, 310*4, 182*4, 438*4, 118*4, 374*4, 246*4, 502*4
.dc.w 14*4, 270*4, 142*4, 398*4, 78*4, 334*4, 206*4, 462*4, 46*4, 302*4, 174*4, 430*4, 110*4, 366*4, 238*4, 494*4
.dc.w 30*4, 286*4, 158*4, 414*4, 94*4, 350*4, 222*4, 478*4, 62*4, 318*4, 190*4, 446*4, 126*4, 382*4, 254*4, 510*4
#elif FFT_N == 256
#ifdef INPUT_IQ
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