diff options
Diffstat (limited to 'fw/hid-dials/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/StatisticsFunctions/std.c')
| -rw-r--r-- | fw/hid-dials/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/StatisticsFunctions/std.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/fw/hid-dials/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/StatisticsFunctions/std.c b/fw/hid-dials/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/StatisticsFunctions/std.c new file mode 100644 index 0000000..c0c1ba3 --- /dev/null +++ b/fw/hid-dials/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/StatisticsFunctions/std.c @@ -0,0 +1,74 @@ +#include "ref.h"
+
+void ref_std_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 = sqrtf((sumsq - sum * sum / (float32_t)blockSize) / ((float32_t)blockSize - 1));
+}
+
+void ref_std_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;
+ }
+ sumsq /= (q63_t)(blockSize - 1);
+ sum = sum * sum / (q63_t)(blockSize * (blockSize - 1));
+ *pResult = (q31_t)(sqrtf((float)( (sumsq - sum) >> 15) / 2147483648.0f ) * 2147483648.0f);
+}
+
+void ref_std_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];
+ }
+ sumsq /= (q63_t)(blockSize - 1);
+ sum = (q31_t)((q63_t)sum * sum / (q63_t)(blockSize * (blockSize - 1)));
+ *pResult = (q15_t)(sqrtf((float)ref_sat_q15( (sumsq - sum) >> 15) / 32768.0f ) * 32768.0f);
+}
|