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author | JanHenrik <janhenrik@janhenrik.org> | 2020-01-19 00:56:37 +0100 |
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committer | JanHenrik <janhenrik@janhenrik.org> | 2020-01-19 00:56:37 +0100 |
commit | a81fc41c3eb99e8fc52aa734ee63e13c937aab81 (patch) | |
tree | 19974c4676ed64d6e4260b79fc3f1eaeda58a289 /Blink/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/StatisticsFunctions/var.c | |
parent | a96ec5d9995e7e4b7315a192e543b88f0aff4930 (diff) | |
download | minikbd-a81fc41c3eb99e8fc52aa734ee63e13c937aab81.tar.gz minikbd-a81fc41c3eb99e8fc52aa734ee63e13c937aab81.tar.bz2 minikbd-a81fc41c3eb99e8fc52aa734ee63e13c937aab81.zip |
added blink example
Diffstat (limited to 'Blink/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/StatisticsFunctions/var.c')
-rw-r--r-- | Blink/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/StatisticsFunctions/var.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/Blink/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/StatisticsFunctions/var.c b/Blink/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/StatisticsFunctions/var.c new file mode 100644 index 0000000..f5da3a6 --- /dev/null +++ b/Blink/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/StatisticsFunctions/var.c @@ -0,0 +1,70 @@ +#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;
+}
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