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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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50
examples/dsp/BasicMathFunctions_part2/scale.c Normal file
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#include "ref.h"
void ref_scale_f32(float32_t *pSrc, float32_t scale, float32_t *pDst,
uint32_t blockSize)
{
uint32_t i;
for (i = 0; i < blockSize; i++) {
pDst[i] = pSrc[i] * scale;
}
}
void ref_scale_q31(q31_t *pSrc, q31_t scaleFract, int8_t shift, q31_t *pDst,
uint32_t blockSize)
{
uint32_t i;
int8_t kShift = shift + 1; /* Shift to apply after scaling */
int8_t sign = (kShift & 0x80);
q63_t temp;
for (i = 0; i < blockSize; i++) {
temp = ((q63_t)pSrc[i] * scaleFract) >> 32;
if (sign)
pDst[i] = temp >> -kShift;
else
pDst[i] = ref_sat_q31((q63_t)temp << kShift);
}
}
void ref_scale_q15(q15_t *pSrc, q15_t scaleFract, int8_t shift, q15_t *pDst,
uint32_t blockSize)
{
uint32_t i;
int8_t kShift = 15 - shift; /* Shift to apply after scaling */
for (i = 0; i < blockSize; i++) {
pDst[i] = ref_sat_q15(((q31_t)pSrc[i] * scaleFract) >> kShift);
}
}
void ref_scale_q7(q7_t *pSrc, q7_t scaleFract, int8_t shift, q7_t *pDst,
uint32_t blockSize)
{
uint32_t i;
int8_t kShift = 7 - shift; /* Shift to apply after scaling */
for (i = 0; i < blockSize; i++) {
pDst[i] = ref_sat_q7(((q15_t)pSrc[i] * scaleFract) >> kShift);
}
}