From 86608c6770cf08c138a2bdab5855072f64be09ef Mon Sep 17 00:00:00 2001
From: joshua <joshua@joshuayun.com>
Date: Sat, 30 Dec 2023 23:54:31 -0500
Subject: initial commit

---
 .../Source/BasicMathFunctions/arm_dot_prod_q7.c    | 139 +++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q7.c

(limited to 'Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q7.c')

diff --git a/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q7.c b/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q7.c
new file mode 100644
index 0000000..e8ba22b
--- /dev/null
+++ b/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q7.c
@@ -0,0 +1,139 @@
+/* ----------------------------------------------------------------------
+ * Project:      CMSIS DSP Library
+ * Title:        arm_dot_prod_q7.c
+ * Description:  Q7 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 groupMath
+ */
+
+/**
+  @addtogroup BasicDotProd
+  @{
+ */
+
+/**
+  @brief         Dot product of Q7 vectors.
+  @param[in]     pSrcA      points to the first input vector
+  @param[in]     pSrcB      points to the second input vector
+  @param[in]     blockSize  number of samples in each vector
+  @param[out]    result     output result returned here
+  @return        none
+
+  @par           Scaling and Overflow Behavior
+                   The intermediate multiplications are in 1.7 x 1.7 = 2.14 format and these
+                   results are added to an accumulator in 18.14 format.
+                   Nonsaturating additions are used and there is no danger of wrap around as long as
+                   the vectors are less than 2^18 elements long.
+                   The return result is in 18.14 format.
+ */
+
+void arm_dot_prod_q7(
+  const q7_t * pSrcA,
+  const q7_t * pSrcB,
+        uint32_t blockSize,
+        q31_t * result)
+{
+        uint32_t blkCnt;                               /* Loop counter */
+        q31_t sum = 0;                                 /* Temporary return variable */
+
+#if defined (ARM_MATH_LOOPUNROLL)
+
+#if defined (ARM_MATH_DSP)
+  q31_t input1, input2;                          /* Temporary variables */
+  q31_t inA1, inA2, inB1, inB2;                  /* Temporary variables */
+#endif
+
+  /* Loop unrolling: Compute 4 outputs at a time */
+  blkCnt = blockSize >> 2U;
+
+  while (blkCnt > 0U)
+  {
+    /* C = A[0]* B[0] + A[1]* B[1] + A[2]* B[2] + .....+ A[blockSize-1]* B[blockSize-1] */
+
+#if defined (ARM_MATH_DSP)
+    /* read 4 samples at a time from sourceA */
+    input1 = read_q7x4_ia ((q7_t **) &pSrcA);
+    /* read 4 samples at a time from sourceB */
+    input2 = read_q7x4_ia ((q7_t **) &pSrcB);
+
+    /* extract two q7_t samples to q15_t samples */
+    inA1 = __SXTB16(__ROR(input1, 8));
+    /* extract reminaing two samples */
+    inA2 = __SXTB16(input1);
+    /* extract two q7_t samples to q15_t samples */
+    inB1 = __SXTB16(__ROR(input2, 8));
+    /* extract reminaing two samples */
+    inB2 = __SXTB16(input2);
+
+    /* multiply and accumulate two samples at a time */
+    sum = __SMLAD(inA1, inB1, sum);
+    sum = __SMLAD(inA2, inB2, sum);
+#else
+    sum += (q31_t) ((q15_t) *pSrcA++ * *pSrcB++);
+    sum += (q31_t) ((q15_t) *pSrcA++ * *pSrcB++);
+    sum += (q31_t) ((q15_t) *pSrcA++ * *pSrcB++);
+    sum += (q31_t) ((q15_t) *pSrcA++ * *pSrcB++);
+#endif
+
+    /* Decrement loop counter */
+    blkCnt--;
+  }
+
+  /* Loop unrolling: Compute remaining outputs */
+  blkCnt = blockSize % 0x4U;
+
+#else
+
+  /* Initialize blkCnt with number of samples */
+  blkCnt = blockSize;
+
+#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
+
+  while (blkCnt > 0U)
+  {
+    /* C = A[0]* B[0] + A[1]* B[1] + A[2]* B[2] + .....+ A[blockSize-1]* B[blockSize-1] */
+
+    /* Calculate dot product and store result in a temporary buffer. */
+//#if defined (ARM_MATH_DSP)
+//    sum  = __SMLAD(*pSrcA++, *pSrcB++, sum);
+//#else
+    sum += (q31_t) ((q15_t) *pSrcA++ * *pSrcB++);
+//#endif
+
+    /* Decrement loop counter */
+    blkCnt--;
+  }
+
+  /* Store result in destination buffer in 18.14 format */
+  *result = sum;
+}
+
+/**
+  @} end of BasicDotProd group
+ */
-- 
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