1 files changed, 154 insertions, 0 deletions
diff --git a/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q15.c b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q15.c
new file mode 100644
index 0000000..5947958
--- /dev/null
+++ b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q15.c
@@ -0,0 +1,154 @@
+/* ----------------------------------------------------------------------
+ * Project:      CMSIS DSP Library
+ * Title:        arm_cmplx_dot_prod_q15.c
+ * Description:  Processing function for the Q15 Complex Dot product
+ *
+ * $Date:        18. March 2019
+ * $Revision:    V1.6.0
+ *
+ * Target Processor: Cortex-M cores
+ * -------------------------------------------------------------------- */
+/*
+ * Copyright (C) 2010-2019 ARM Limited or its affiliates. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "arm_math.h"
+
+/**
+  @ingroup groupCmplxMath
+ */
+
+/**
+  @addtogroup cmplx_dot_prod
+  @{
+ */
+
+/**
+  @brief         Q15 complex dot product.
+  @param[in]     pSrcA       points to the first input vector
+  @param[in]     pSrcB       points to the second input vector
+  @param[in]     numSamples  number of samples in each vector
+  @param[out]    realResult  real part of the result returned here
+  @param[out]    imagResult  imaginary part of the result returned her
+  @return        none
+
+  @par           Scaling and Overflow Behavior
+                   The function is implemented using an internal 64-bit accumulator.
+                   The intermediate 1.15 by 1.15 multiplications are performed with full precision and yield a 2.30 result.
+                   These are accumulated in a 64-bit accumulator with 34.30 precision.
+                   As a final step, the accumulators are converted to 8.24 format.
+                   The return results <code>realResult</code> and <code>imagResult</code> are in 8.24 format.
+ */
+
+void arm_cmplx_dot_prod_q15(
+  const q15_t * pSrcA,
+  const q15_t * pSrcB,
+        uint32_t numSamples,
+        q31_t * realResult,
+        q31_t * imagResult)
+{
+        uint32_t blkCnt;                               /* Loop counter */
+        q63_t real_sum = 0, imag_sum = 0;              /* Temporary result variables */
+        q15_t a0,b0,c0,d0;
+
+#if defined (ARM_MATH_LOOPUNROLL)
+
+  /* Loop unrolling: Compute 4 outputs at a time */
+  blkCnt = numSamples >> 2U;
+
+  while (blkCnt > 0U)
+  {
+    a0 = *pSrcA++;
+    b0 = *pSrcA++;
+    c0 = *pSrcB++;
+    d0 = *pSrcB++;
+
+    real_sum += (q31_t)a0 * c0;
+    imag_sum += (q31_t)a0 * d0;
+    real_sum -= (q31_t)b0 * d0;
+    imag_sum += (q31_t)b0 * c0;
+
+    a0 = *pSrcA++;
+    b0 = *pSrcA++;
+    c0 = *pSrcB++;
+    d0 = *pSrcB++;
+
+    real_sum += (q31_t)a0 * c0;
+    imag_sum += (q31_t)a0 * d0;
+    real_sum -= (q31_t)b0 * d0;
+    imag_sum += (q31_t)b0 * c0;
+
+    a0 = *pSrcA++;
+    b0 = *pSrcA++;
+    c0 = *pSrcB++;
+    d0 = *pSrcB++;
+
+    real_sum += (q31_t)a0 * c0;
+    imag_sum += (q31_t)a0 * d0;
+    real_sum -= (q31_t)b0 * d0;
+    imag_sum += (q31_t)b0 * c0;
+
+    a0 = *pSrcA++;
+    b0 = *pSrcA++;
+    c0 = *pSrcB++;
+    d0 = *pSrcB++;
+
+    real_sum += (q31_t)a0 * c0;
+    imag_sum += (q31_t)a0 * d0;
+    real_sum -= (q31_t)b0 * d0;
+    imag_sum += (q31_t)b0 * c0;
+
+    /* Decrement loop counter */
+    blkCnt--;
+  }
+
+  /* Loop unrolling: Compute remaining outputs */
+  blkCnt = numSamples % 0x4U;
+
+#else
+
+  /* Initialize blkCnt with number of samples */
+  blkCnt = numSamples;
+
+#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
+
+  while (blkCnt > 0U)
+  {
+    a0 = *pSrcA++;
+    b0 = *pSrcA++;
+    c0 = *pSrcB++;
+    d0 = *pSrcB++;
+
+    real_sum += (q31_t)a0 * c0;
+    imag_sum += (q31_t)a0 * d0;
+    real_sum -= (q31_t)b0 * d0;
+    imag_sum += (q31_t)b0 * c0;
+
+    /* Decrement loop counter */
+    blkCnt--;
+  }
+
+  /* Store real and imaginary result in 8.24 format  */
+  /* Convert real data in 34.30 to 8.24 by 6 right shifts */
+  *realResult = (q31_t) (real_sum >> 6);
+  /* Convert imaginary data in 34.30 to 8.24 by 6 right shifts */
+  *imagResult = (q31_t) (imag_sum >> 6);
+}
+
+/**
+  @} end of cmplx_dot_prod group
+ */