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Diffstat (limited to 'Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_mult_q15.c')
| -rw-r--r-- | Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_mult_q15.c | 357 |
1 files changed, 357 insertions, 0 deletions
diff --git a/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_mult_q15.c b/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_mult_q15.c new file mode 100644 index 0000000..4a3bde8 --- /dev/null +++ b/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_mult_q15.c @@ -0,0 +1,357 @@ +/* ----------------------------------------------------------------------
+ * Project: CMSIS DSP Library
+ * Title: arm_mat_mult_q15.c
+ * Description: Q15 matrix multiplication
+ *
+ * $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 groupMatrix
+ */
+
+/**
+ @addtogroup MatrixMult
+ @{
+ */
+
+/**
+ @brief Q15 matrix multiplication.
+ @param[in] pSrcA points to the first input matrix structure
+ @param[in] pSrcB points to the second input matrix structure
+ @param[out] pDst points to output matrix structure
+ @param[in] pState points to the array for storing intermediate results (Unused)
+ @return execution status
+ - \ref ARM_MATH_SUCCESS : Operation successful
+ - \ref ARM_MATH_SIZE_MISMATCH : Matrix size check failed
+
+ @par Scaling and Overflow Behavior
+ The function is implemented using an internal 64-bit accumulator. The inputs to the
+ multiplications are in 1.15 format and multiplications yield a 2.30 result.
+ The 2.30 intermediate results are accumulated in a 64-bit accumulator in 34.30 format.
+ This approach provides 33 guard bits and there is no risk of overflow.
+ The 34.30 result is then truncated to 34.15 format by discarding the low 15 bits
+ and then saturated to 1.15 format.
+ @par
+ Refer to \ref arm_mat_mult_fast_q15() for a faster but less precise version of this function.
+ */
+
+arm_status arm_mat_mult_q15(
+ const arm_matrix_instance_q15 * pSrcA,
+ const arm_matrix_instance_q15 * pSrcB,
+ arm_matrix_instance_q15 * pDst,
+ q15_t * pState)
+{
+ q63_t sum; /* Accumulator */
+
+#if defined (ARM_MATH_DSP) /* != CM0 */
+
+ q15_t *pSrcBT = pState; /* Input data matrix pointer for transpose */
+ q15_t *pInA = pSrcA->pData; /* Input data matrix pointer A of Q15 type */
+ q15_t *pInB = pSrcB->pData; /* Input data matrix pointer B of Q15 type */
+ q15_t *px; /* Temporary output data matrix pointer */
+ uint16_t numRowsA = pSrcA->numRows; /* Number of rows of input matrix A */
+ uint16_t numColsB = pSrcB->numCols; /* Number of columns of input matrix B */
+ uint16_t numColsA = pSrcA->numCols; /* Number of columns of input matrix A */
+ uint16_t numRowsB = pSrcB->numRows; /* Number of rows of input matrix A */
+ uint32_t col, i = 0U, row = numRowsB, colCnt; /* Loop counters */
+ arm_status status; /* Status of matrix multiplication */
+
+ q31_t in; /* Temporary variable to hold the input value */
+ q31_t inA1, inB1, inA2, inB2;
+
+#ifdef ARM_MATH_MATRIX_CHECK
+
+ /* Check for matrix mismatch condition */
+ if ((pSrcA->numCols != pSrcB->numRows) ||
+ (pSrcA->numRows != pDst->numRows) ||
+ (pSrcB->numCols != pDst->numCols) )
+ {
+ /* Set status as ARM_MATH_SIZE_MISMATCH */
+ status = ARM_MATH_SIZE_MISMATCH;
+ }
+ else
+
+#endif /* #ifdef ARM_MATH_MATRIX_CHECK */
+
+ {
+ /* Matrix transpose */
+ do
+ {
+ /* The pointer px is set to starting address of column being processed */
+ px = pSrcBT + i;
+
+ /* Apply loop unrolling and exchange columns with row elements */
+ col = numColsB >> 2U;
+
+ /* First part of the processing with loop unrolling. Compute 4 outputs at a time.
+ ** a second loop below computes the remaining 1 to 3 samples. */
+ while (col > 0U)
+ {
+ /* Read two elements from row */
+ in = read_q15x2_ia ((q15_t **) &pInB);
+
+ /* Unpack and store one element in destination */
+#ifndef ARM_MATH_BIG_ENDIAN
+ *px = (q15_t) in;
+#else
+ *px = (q15_t) ((in & (q31_t) 0xffff0000) >> 16);
+#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
+
+ /* Update pointer px to point to next row of transposed matrix */
+ px += numRowsB;
+
+ /* Unpack and store second element in destination */
+#ifndef ARM_MATH_BIG_ENDIAN
+ *px = (q15_t) ((in & (q31_t) 0xffff0000) >> 16);
+#else
+ *px = (q15_t) in;
+#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
+
+ /* Update pointer px to point to next row of transposed matrix */
+ px += numRowsB;
+
+ /* Read two elements from row */
+ in = read_q15x2_ia ((q15_t **) &pInB);
+
+ /* Unpack and store one element in destination */
+#ifndef ARM_MATH_BIG_ENDIAN
+ *px = (q15_t) in;
+#else
+ *px = (q15_t) ((in & (q31_t) 0xffff0000) >> 16);
+#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
+ px += numRowsB;
+
+#ifndef ARM_MATH_BIG_ENDIAN
+ *px = (q15_t) ((in & (q31_t) 0xffff0000) >> 16);
+#else
+ *px = (q15_t) in;
+#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
+ px += numRowsB;
+
+ /* Decrement column loop counter */
+ col--;
+ }
+
+ /* If the columns of pSrcB is not a multiple of 4, compute any remaining output samples here.
+ ** No loop unrolling is used. */
+ col = numColsB % 0x4U;
+
+ while (col > 0U)
+ {
+ /* Read and store input element in destination */
+ *px = *pInB++;
+
+ /* Update pointer px to point to next row of transposed matrix */
+ px += numRowsB;
+
+ /* Decrement column loop counter */
+ col--;
+ }
+
+ i++;
+
+ /* Decrement row loop counter */
+ row--;
+
+ } while (row > 0U);
+
+ /* Reset variables for usage in following multiplication process */
+ row = numRowsA;
+ i = 0U;
+ px = pDst->pData;
+
+ /* The following loop performs the dot-product of each row in pSrcA with each column in pSrcB */
+ /* row loop */
+ do
+ {
+ /* For every row wise process, column loop counter is to be initiated */
+ col = numColsB;
+
+ /* For every row wise process, pIn2 pointer is set to starting address of transposed pSrcB data */
+ pInB = pSrcBT;
+
+ /* column loop */
+ do
+ {
+ /* Set variable sum, that acts as accumulator, to zero */
+ sum = 0;
+
+ /* Initiate pointer pInA to point to starting address of column being processed */
+ pInA = pSrcA->pData + i;
+
+ /* Apply loop unrolling and compute 2 MACs simultaneously. */
+ colCnt = numColsA >> 2U;
+
+ /* matrix multiplication */
+ while (colCnt > 0U)
+ {
+ /* c(m,n) = a(1,1) * b(1,1) + a(1,2) * b(2,1) + .... + a(m,p) * b(p,n) */
+
+ /* read real and imag values from pSrcA and pSrcB buffer */
+ inA1 = read_q15x2_ia ((q15_t **) &pInA);
+ inB1 = read_q15x2_ia ((q15_t **) &pInB);
+
+ inA2 = read_q15x2_ia ((q15_t **) &pInA);
+ inB2 = read_q15x2_ia ((q15_t **) &pInB);
+
+ /* Multiply and Accumlates */
+ sum = __SMLALD(inA1, inB1, sum);
+ sum = __SMLALD(inA2, inB2, sum);
+
+ /* Decrement loop counter */
+ colCnt--;
+ }
+
+ /* process remaining column samples */
+ colCnt = numColsA % 0x4U;
+
+ while (colCnt > 0U)
+ {
+ /* c(m,n) = a(1,1) * b(1,1) + a(1,2) * b(2,1) + .... + a(m,p) * b(p,n) */
+ sum += *pInA++ * *pInB++;
+
+ /* Decrement loop counter */
+ colCnt--;
+ }
+
+ /* Saturate and store result in destination buffer */
+ *px = (q15_t) (__SSAT((sum >> 15), 16));
+ px++;
+
+ /* Decrement column loop counter */
+ col--;
+
+ } while (col > 0U);
+
+ i = i + numColsA;
+
+ /* Decrement row loop counter */
+ row--;
+
+ } while (row > 0U);
+
+#else /* #if defined (ARM_MATH_DSP) */
+
+ q15_t *pIn1 = pSrcA->pData; /* Input data matrix pointer A */
+ q15_t *pIn2 = pSrcB->pData; /* Input data matrix pointer B */
+ q15_t *pInA = pSrcA->pData; /* Input data matrix pointer A of Q15 type */
+ q15_t *pInB = pSrcB->pData; /* Input data matrix pointer B of Q15 type */
+ q15_t *pOut = pDst->pData; /* Output data matrix pointer */
+ q15_t *px; /* Temporary output data matrix pointer */
+ uint16_t numColsB = pSrcB->numCols; /* Number of columns of input matrix B */
+ uint16_t numColsA = pSrcA->numCols; /* Number of columns of input matrix A */
+ uint16_t numRowsA = pSrcA->numRows; /* Number of rows of input matrix A */
+ uint32_t col, i = 0U, row = numRowsA, colCnt; /* Loop counters */
+ arm_status status; /* Status of matrix multiplication */
+
+#ifdef ARM_MATH_MATRIX_CHECK
+
+ /* Check for matrix mismatch condition */
+ if ((pSrcA->numCols != pSrcB->numRows) ||
+ (pSrcA->numRows != pDst->numRows) ||
+ (pSrcB->numCols != pDst->numCols) )
+ {
+ /* Set status as ARM_MATH_SIZE_MISMATCH */
+ status = ARM_MATH_SIZE_MISMATCH;
+ }
+ else
+
+#endif /* #ifdef ARM_MATH_MATRIX_CHECK */
+
+ {
+ /* The following loop performs the dot-product of each row in pSrcA with each column in pSrcB */
+ /* row loop */
+ do
+ {
+ /* Output pointer is set to starting address of the row being processed */
+ px = pOut + i;
+
+ /* For every row wise process, column loop counter is to be initiated */
+ col = numColsB;
+
+ /* For every row wise process, pIn2 pointer is set to starting address of pSrcB data */
+ pIn2 = pSrcB->pData;
+
+ /* column loop */
+ do
+ {
+ /* Set the variable sum, that acts as accumulator, to zero */
+ sum = 0;
+
+ /* Initiate pointer pIn1 to point to starting address of pSrcA */
+ pIn1 = pInA;
+
+ /* Matrix A columns number of MAC operations are to be performed */
+ colCnt = numColsA;
+
+ /* matrix multiplication */
+ while (colCnt > 0U)
+ {
+ /* c(m,n) = a(1,1) * b(1,1) + a(1,2) * b(2,1) + .... + a(m,p) * b(p,n) */
+
+ /* Perform multiply-accumulates */
+ sum += (q31_t) * pIn1++ * *pIn2;
+ pIn2 += numColsB;
+
+ /* Decrement loop counter */
+ colCnt--;
+ }
+
+ /* Convert result from 34.30 to 1.15 format and store saturated value in destination buffer */
+
+ /* Saturate and store result in destination buffer */
+ *px++ = (q15_t) __SSAT((sum >> 15), 16);
+
+ /* Decrement column loop counter */
+ col--;
+
+ /* Update pointer pIn2 to point to starting address of next column */
+ pIn2 = pInB + (numColsB - col);
+
+ } while (col > 0U);
+
+ /* Update pointer pSrcA to point to starting address of next row */
+ i = i + numColsB;
+ pInA = pInA + numColsA;
+
+ /* Decrement row loop counter */
+ row--;
+
+ } while (row > 0U);
+
+#endif /* #if defined (ARM_MATH_DSP) */
+
+ /* Set status as ARM_MATH_SUCCESS */
+ status = ARM_MATH_SUCCESS;
+ }
+
+ /* Return to application */
+ return (status);
+}
+
+/**
+ @} end of MatrixMult group
+ */
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