diff options
Diffstat (limited to 'Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/BasicMathFunctions/scale.c')
| -rw-r--r-- | Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/BasicMathFunctions/scale.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/BasicMathFunctions/scale.c b/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/BasicMathFunctions/scale.c new file mode 100644 index 0000000..5ab655c --- /dev/null +++ b/Drivers/CMSIS/DSP/DSP_Lib_TestSuite/RefLibs/src/BasicMathFunctions/scale.c @@ -0,0 +1,69 @@ +#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);
+ }
+}
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