CMSIS-DSP
Verison 1.1.0
CMSIS DSP Software Library
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Variables | |
const uint16_t | armBitRevTable [1024] |
const float32_t | twiddleCoef [6144] |
const q31_t | twiddleCoefQ31 [6144] |
const q15_t ALIGN4 | twiddleCoefQ15 [6144] |
const uint16_t armBitRevTable[1024] |
for(l=1;l <= N/4;l++) { for(i=0;i<logN2;i++) { a[i]=l&(1<<i); } for(j=0; j<logN2; j++) { if (a[j]!=0) y[l]+=(1<<((logN2-1)-j)); } y[l] = y[l] >> 1; }
Referenced by arm_cfft_radix2_init_f32(), arm_cfft_radix2_init_q15(), arm_cfft_radix2_init_q31(), arm_cfft_radix4_init_f32(), arm_cfft_radix4_init_q15(), and arm_cfft_radix4_init_q31().
const float32_t twiddleCoef[6144] |
for(i = 0; i< 3N/4; i++) { twiddleCoef[2*i]= cos(i * 2*PI/(float)N); twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N); }
Referenced by arm_cfft_radix2_init_f32(), and arm_cfft_radix4_init_f32().
const q15_t ALIGN4 twiddleCoefQ15[6144] |
for(i = 0; i< 3N/4; i++) { twiddleCoefQ15[2*i]= cos(i * 2*PI/(float)N); twiddleCoefQ15[2*i+1]= sin(i * 2*PI/(float)N); }
Referenced by arm_cfft_radix2_init_q15(), and arm_cfft_radix4_init_q15().
const q31_t twiddleCoefQ31[6144] |
for(i = 0; i< 3N/4; i++) { twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N); twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N); }
Referenced by arm_cfft_radix2_init_q31(), and arm_cfft_radix4_init_q31().