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[feat][nmsis] add nmsis component and nn,dsp demo

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jzlv 2021-09-26 13:38:51 +08:00
parent b2aada479b
commit 5d1126d0f0
989 changed files with 286224 additions and 0 deletions
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59
examples/dsp/StatisticsFunctions_part1/var.c Normal file
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#include "ref.h"
void ref_var_f32(float32_t *pSrc, uint32_t blockSize, float32_t *pResult)
{
uint32_t i;
float32_t sum = 0, sumsq = 0;
if (blockSize == 1) {
*pResult = 0;
return;
}
for (i = 0; i < blockSize; i++) {
sum += pSrc[i];
sumsq += pSrc[i] * pSrc[i];
}
*pResult =
(sumsq - sum * sum / (float32_t)blockSize) / ((float32_t)blockSize - 1);
}
void ref_var_q31(q31_t *pSrc, uint32_t blockSize, q31_t *pResult)
{
uint32_t i;
q63_t sum = 0, sumsq = 0;
q31_t in;
if (blockSize == 1) {
*pResult = 0;
return;
}
for (i = 0; i < blockSize; i++) {
in = pSrc[i] >> 8;
sum += in;
sumsq += (q63_t)in * in;
}
*pResult =
(sumsq - sum * sum / (q31_t)blockSize) / ((q31_t)blockSize - 1) >> 15;
}
void ref_var_q15(q15_t *pSrc, uint32_t blockSize, q15_t *pResult)
{
uint32_t i;
q31_t sum = 0;
q63_t sumsq = 0;
if (blockSize == 1) {
*pResult = 0;
return;
}
for (i = 0; i < blockSize; i++) {
sum += pSrc[i];
sumsq += (q63_t)pSrc[i] * pSrc[i];
}
*pResult = (q31_t)((sumsq - (q63_t)sum * sum / (q63_t)blockSize) /
((q63_t)blockSize - 1)) >>
15;
}