619 lines
18 KiB
C
619 lines
18 KiB
C
#include "riscv_const_structs.h"
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#include "ref.h"
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void ref_cfft_f32(const riscv_cfft_instance_f32 *S, float32_t *p1,
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uint8_t ifftFlag, uint8_t bitReverseFlag)
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{
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int n, mmax, m, j, istep, i;
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float32_t wtemp, wr, wpr, wpi, wi, theta;
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float32_t tempr, tempi;
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float32_t *data = p1;
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uint32_t N = S->fftLen;
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int32_t dir = (ifftFlag) ? -1 : 1;
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// decrement pointer since the original version used fortran style indexing.
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data--;
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n = N << 1;
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j = 1;
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for (i = 1; i < n; i += 2) {
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if (j > i) {
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tempr = data[j];
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data[j] = data[i];
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data[i] = tempr;
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tempr = data[j + 1];
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data[j + 1] = data[i + 1];
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data[i + 1] = tempr;
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}
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m = n >> 1;
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while (m >= 2 && j > m) {
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j -= m;
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m >>= 1;
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}
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j += m;
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}
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mmax = 2;
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while (n > mmax) {
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istep = 2 * mmax;
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theta = -6.283185307179586f / (dir * mmax);
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wtemp = sinf(0.5f * theta);
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wpr = -2.0f * wtemp * wtemp;
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wpi = sinf(theta);
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wr = 1.0f;
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wi = 0.0f;
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for (m = 1; m < mmax; m += 2) {
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for (i = m; i <= n; i += istep) {
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j = i + mmax;
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tempr = wr * data[j] - wi * data[j + 1];
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tempi = wr * data[j + 1] + wi * data[j];
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data[j] = data[i] - tempr;
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data[j + 1] = data[i + 1] - tempi;
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data[i] += tempr;
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data[i + 1] += tempi;
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}
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wr = (wtemp = wr) * wpr - wi * wpi + wr;
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wi = wi * wpr + wtemp * wpi + wi;
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}
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mmax = istep;
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}
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// Inverse transform is scaled by 1/N
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if (ifftFlag) {
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data++;
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for (i = 0; i < 2 * N; i++) {
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data[i] /= N;
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}
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}
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}
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void ref_cfft_q31(const riscv_cfft_instance_q31 *S, q31_t *p1, uint8_t ifftFlag,
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uint8_t bitReverseFlag)
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{
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uint32_t i;
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// float32_t *fSrc = (float32_t*)p1;
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float32_t fSrc[S->fftLen * 2];
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riscv_q31_to_float(p1, fSrc, S->fftLen * 2);
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for (i = 0; i < S->fftLen * 2; i++) {
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// read the q31 data, cast to float, scale down for float
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fSrc[i] = (float32_t)p1[i] / 2147483648.0f;
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}
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switch (S->fftLen) {
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case 16:
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ref_cfft_f32(&riscv_cfft_sR_f32_len16, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 32:
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ref_cfft_f32(&riscv_cfft_sR_f32_len32, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 64:
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ref_cfft_f32(&riscv_cfft_sR_f32_len64, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 128:
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ref_cfft_f32(&riscv_cfft_sR_f32_len128, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 256:
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ref_cfft_f32(&riscv_cfft_sR_f32_len256, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 512:
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ref_cfft_f32(&riscv_cfft_sR_f32_len512, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 1024:
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ref_cfft_f32(&riscv_cfft_sR_f32_len1024, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 2048:
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ref_cfft_f32(&riscv_cfft_sR_f32_len2048, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 4096:
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ref_cfft_f32(&riscv_cfft_sR_f32_len4096, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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}
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if (ifftFlag) {
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for (i = 0; i < S->fftLen * 2; i++) {
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// read the float data, scale up for q31, cast to q31
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p1[i] = (q31_t)(fSrc[i] * 2147483648.0f);
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}
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} else {
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for (i = 0; i < S->fftLen * 2; i++) {
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// read the float data, scale up for q31, cast to q31
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p1[i] = (q31_t)(fSrc[i] * 2147483648.0f / (float32_t)S->fftLen);
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}
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}
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}
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void ref_cfft_q15(const riscv_cfft_instance_q15 *S, q15_t *pSrc, uint8_t ifftFlag,
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uint8_t bitReverseFlag)
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{
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uint32_t i;
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// float32_t *fSrc = (float32_t*)pSrc;
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float32_t fSrc[S->fftLen * 2];
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riscv_q15_to_float(pSrc, fSrc, S->fftLen * 2);
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for (i = 0; i < S->fftLen * 2; i++) {
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// read the q15 data, cast to float, scale down for float, place in
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// temporary buffer
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scratchArray[i] = (float32_t)pSrc[i] / 32768.0f;
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}
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for (i = 0; i < S->fftLen * 2; i++) {
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// copy from temp buffer to final buffer
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fSrc[i] = scratchArray[i];
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}
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switch (S->fftLen) {
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case 16:
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ref_cfft_f32(&riscv_cfft_sR_f32_len16, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 32:
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ref_cfft_f32(&riscv_cfft_sR_f32_len32, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 64:
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ref_cfft_f32(&riscv_cfft_sR_f32_len64, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 128:
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ref_cfft_f32(&riscv_cfft_sR_f32_len128, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 256:
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ref_cfft_f32(&riscv_cfft_sR_f32_len256, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 512:
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ref_cfft_f32(&riscv_cfft_sR_f32_len512, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 1024:
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ref_cfft_f32(&riscv_cfft_sR_f32_len1024, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 2048:
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ref_cfft_f32(&riscv_cfft_sR_f32_len2048, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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case 4096:
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ref_cfft_f32(&riscv_cfft_sR_f32_len4096, fSrc, ifftFlag,
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bitReverseFlag);
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break;
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}
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if (ifftFlag) {
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for (i = 0; i < S->fftLen * 2; i++) {
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// read the float data, scale up for q15, cast to q15
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pSrc[i] = (q15_t)(fSrc[i] * 32768.0f);
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}
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} else {
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for (i = 0; i < S->fftLen * 2; i++) {
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// read the float data, scale up for q15, cast to q15
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pSrc[i] = (q15_t)(fSrc[i] * 32768.0f / (float32_t)S->fftLen);
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}
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}
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}
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void ref_cfft_radix2_f32(const riscv_cfft_radix2_instance_f32 *S, float32_t *pSrc)
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{
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switch (S->fftLen) {
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case 16:
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ref_cfft_f32(&riscv_cfft_sR_f32_len16, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 32:
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ref_cfft_f32(&riscv_cfft_sR_f32_len32, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 64:
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ref_cfft_f32(&riscv_cfft_sR_f32_len64, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 128:
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ref_cfft_f32(&riscv_cfft_sR_f32_len128, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 256:
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ref_cfft_f32(&riscv_cfft_sR_f32_len256, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 512:
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ref_cfft_f32(&riscv_cfft_sR_f32_len512, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 1024:
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ref_cfft_f32(&riscv_cfft_sR_f32_len1024, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 2048:
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ref_cfft_f32(&riscv_cfft_sR_f32_len2048, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 4096:
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ref_cfft_f32(&riscv_cfft_sR_f32_len4096, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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}
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}
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void ref_cfft_radix2_q31(const riscv_cfft_radix2_instance_q31 *S, q31_t *pSrc)
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{
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uint32_t i;
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// float32_t *fSrc = (float32_t*)pSrc;
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float32_t fSrc[S->fftLen * 2];
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riscv_q31_to_float(pSrc, fSrc, S->fftLen * 2);
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for (i = 0; i < S->fftLen * 2; i++) {
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// read the q31 data, cast to float, scale down for float
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fSrc[i] = (float32_t)pSrc[i] / 2147483648.0f;
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}
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switch (S->fftLen) {
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case 16:
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ref_cfft_f32(&riscv_cfft_sR_f32_len16, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 32:
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ref_cfft_f32(&riscv_cfft_sR_f32_len32, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 64:
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ref_cfft_f32(&riscv_cfft_sR_f32_len64, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 128:
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ref_cfft_f32(&riscv_cfft_sR_f32_len128, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 256:
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ref_cfft_f32(&riscv_cfft_sR_f32_len256, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 512:
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ref_cfft_f32(&riscv_cfft_sR_f32_len512, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 1024:
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ref_cfft_f32(&riscv_cfft_sR_f32_len1024, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 2048:
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ref_cfft_f32(&riscv_cfft_sR_f32_len2048, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 4096:
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ref_cfft_f32(&riscv_cfft_sR_f32_len4096, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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}
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if (S->ifftFlag) {
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for (i = 0; i < S->fftLen * 2; i++) {
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// read the float data, scale up for q31, cast to q31
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pSrc[i] = (q31_t)(fSrc[i] * 2147483648.0f);
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}
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} else {
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for (i = 0; i < S->fftLen * 2; i++) {
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// read the float data, scale up for q31, cast to q31
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pSrc[i] = (q31_t)(fSrc[i] * 2147483648.0f / (float32_t)S->fftLen);
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}
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}
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}
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void ref_cfft_radix2_q15(const riscv_cfft_radix2_instance_q15 *S, q15_t *pSrc)
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{
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uint32_t i;
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// float32_t *fSrc = (float32_t*)pSrc;
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float32_t fSrc[S->fftLen * 2];
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riscv_q15_to_float(pSrc, fSrc, S->fftLen * 2);
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for (i = 0; i < S->fftLen * 2; i++) {
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// read the q15 data, cast to float, scale down for float, place in
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// temporary buffer
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scratchArray[i] = (float32_t)pSrc[i] / 32768.0f;
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}
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for (i = 0; i < S->fftLen * 2; i++) {
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// copy from temp buffer to final buffer
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fSrc[i] = scratchArray[i];
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}
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switch (S->fftLen) {
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case 16:
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ref_cfft_f32(&riscv_cfft_sR_f32_len16, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 32:
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ref_cfft_f32(&riscv_cfft_sR_f32_len32, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 64:
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ref_cfft_f32(&riscv_cfft_sR_f32_len64, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 128:
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ref_cfft_f32(&riscv_cfft_sR_f32_len128, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 256:
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ref_cfft_f32(&riscv_cfft_sR_f32_len256, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 512:
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ref_cfft_f32(&riscv_cfft_sR_f32_len512, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 1024:
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ref_cfft_f32(&riscv_cfft_sR_f32_len1024, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 2048:
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ref_cfft_f32(&riscv_cfft_sR_f32_len2048, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 4096:
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ref_cfft_f32(&riscv_cfft_sR_f32_len4096, fSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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}
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if (S->ifftFlag) {
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for (i = 0; i < S->fftLen * 2; i++) {
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// read the float data, scale up for q15, cast to q15
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pSrc[i] = (q15_t)(fSrc[i] * 32768.0f);
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}
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} else {
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for (i = 0; i < S->fftLen * 2; i++) {
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// read the float data, scale up for q15, cast to q15
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pSrc[i] = (q15_t)(fSrc[i] * 32768.0f / (float32_t)S->fftLen);
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}
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}
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}
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void ref_cfft_radix4_f32(const riscv_cfft_radix4_instance_f32 *S, float32_t *pSrc)
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{
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switch (S->fftLen) {
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case 16:
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ref_cfft_f32(&riscv_cfft_sR_f32_len16, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 32:
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ref_cfft_f32(&riscv_cfft_sR_f32_len32, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 64:
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ref_cfft_f32(&riscv_cfft_sR_f32_len64, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 128:
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ref_cfft_f32(&riscv_cfft_sR_f32_len128, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 256:
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ref_cfft_f32(&riscv_cfft_sR_f32_len256, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 512:
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ref_cfft_f32(&riscv_cfft_sR_f32_len512, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 1024:
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ref_cfft_f32(&riscv_cfft_sR_f32_len1024, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 2048:
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ref_cfft_f32(&riscv_cfft_sR_f32_len2048, pSrc, S->ifftFlag,
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S->bitReverseFlag);
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break;
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case 4096:
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ref_cfft_f32(&riscv_cfft_sR_f32_len4096, pSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void ref_cfft_radix4_q31(const riscv_cfft_radix4_instance_q31 *S, q31_t *pSrc)
|
|
{
|
|
uint32_t i;
|
|
// float32_t *fSrc = (float32_t*)pSrc;
|
|
float32_t fSrc[S->fftLen * 2];
|
|
riscv_q31_to_float(pSrc, fSrc, S->fftLen * 2);
|
|
|
|
for (i = 0; i < S->fftLen * 2; i++) {
|
|
// read the q31 data, cast to float, scale down for float
|
|
fSrc[i] = (float32_t)pSrc[i] / 2147483648.0f;
|
|
}
|
|
|
|
switch (S->fftLen) {
|
|
case 16:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len16, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 32:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len32, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 64:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len64, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 128:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len128, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 256:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len256, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 512:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len512, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 1024:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len1024, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 2048:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len2048, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 4096:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len4096, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
}
|
|
|
|
if (S->ifftFlag) {
|
|
for (i = 0; i < S->fftLen * 2; i++) {
|
|
// read the float data, scale up for q31, cast to q31
|
|
pSrc[i] = (q31_t)(fSrc[i] * 2147483648.0f);
|
|
}
|
|
} else {
|
|
for (i = 0; i < S->fftLen * 2; i++) {
|
|
// read the float data, scale up for q31, cast to q31
|
|
pSrc[i] = (q31_t)(fSrc[i] * 2147483648.0f / (float32_t)S->fftLen);
|
|
}
|
|
}
|
|
}
|
|
|
|
void ref_cfft_radix4_q15(const riscv_cfft_radix4_instance_q15 *S, q15_t *pSrc)
|
|
{
|
|
uint32_t i;
|
|
// float32_t *fSrc = (float32_t*)pSrc;
|
|
float32_t fSrc[S->fftLen * 2];
|
|
riscv_q15_to_float(pSrc, fSrc, S->fftLen * 2);
|
|
|
|
for (i = 0; i < S->fftLen * 2; i++) {
|
|
// read the q15 data, cast to float, scale down for float, place in
|
|
// temporary buffer
|
|
scratchArray[i] = (float32_t)pSrc[i] / 32768.0f;
|
|
}
|
|
|
|
for (i = 0; i < S->fftLen * 2; i++) {
|
|
// copy from temp buffer to final buffer
|
|
fSrc[i] = scratchArray[i];
|
|
}
|
|
|
|
switch (S->fftLen) {
|
|
case 16:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len16, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 32:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len32, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 64:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len64, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 128:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len128, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 256:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len256, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 512:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len512, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 1024:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len1024, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 2048:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len2048, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
|
|
case 4096:
|
|
ref_cfft_f32(&riscv_cfft_sR_f32_len4096, fSrc, S->ifftFlag,
|
|
S->bitReverseFlag);
|
|
break;
|
|
}
|
|
|
|
if (S->ifftFlag) {
|
|
for (i = 0; i < S->fftLen * 2; i++) {
|
|
// read the float data, scale up for q15, cast to q15
|
|
pSrc[i] = (q15_t)(fSrc[i] * 32768.0f);
|
|
}
|
|
} else {
|
|
for (i = 0; i < S->fftLen * 2; i++) {
|
|
// read the float data, scale up for q15, cast to q15
|
|
pSrc[i] = (q15_t)(fSrc[i] * 32768.0f / (float32_t)S->fftLen);
|
|
}
|
|
}
|
|
}
|