diff options
| author | joshua <joshua@joshuayun.com> | 2023-12-30 23:54:31 -0500 |
|---|---|---|
| committer | joshua <joshua@joshuayun.com> | 2023-12-30 23:54:31 -0500 |
| commit | 86608c6770cf08c138a2bdab5855072f64be09ef (patch) | |
| tree | 494a61b3ef37e76f9235a0d10f5c93d97290a35f /Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_sub_q15.c | |
| download | sdr-software-master.tar.gz | |
Diffstat (limited to 'Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_sub_q15.c')
| -rw-r--r-- | Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_sub_q15.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_sub_q15.c b/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_sub_q15.c new file mode 100644 index 0000000..37496ea --- /dev/null +++ b/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_sub_q15.c @@ -0,0 +1,144 @@ +/* ----------------------------------------------------------------------
+ * Project: CMSIS DSP Library
+ * Title: arm_mat_sub_q15.c
+ * Description: Q15 Matrix subtraction
+ *
+ * $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 MatrixSub
+ @{
+ */
+
+/**
+ @brief Q15 matrix subtraction.
+ @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
+ @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 uses saturating arithmetic.
+ Results outside of the allowable Q15 range [0x8000 0x7FFF] are saturated.
+ */
+
+arm_status arm_mat_sub_q15(
+ const arm_matrix_instance_q15 * pSrcA,
+ const arm_matrix_instance_q15 * pSrcB,
+ arm_matrix_instance_q15 * pDst)
+{
+ q15_t *pInA = pSrcA->pData; /* input data matrix pointer A */
+ q15_t *pInB = pSrcB->pData; /* input data matrix pointer B */
+ q15_t *pOut = pDst->pData; /* output data matrix pointer */
+
+ uint32_t numSamples; /* total number of elements in the matrix */
+ uint32_t blkCnt; /* loop counters */
+ arm_status status; /* status of matrix subtraction */
+
+#ifdef ARM_MATH_MATRIX_CHECK
+
+ /* Check for matrix mismatch condition */
+ if ((pSrcA->numRows != pSrcB->numRows) ||
+ (pSrcA->numCols != pSrcB->numCols) ||
+ (pSrcA->numRows != pDst->numRows) ||
+ (pSrcA->numCols != pDst->numCols) )
+ {
+ /* Set status as ARM_MATH_SIZE_MISMATCH */
+ status = ARM_MATH_SIZE_MISMATCH;
+ }
+ else
+#endif /* #ifdef ARM_MATH_MATRIX_CHECK */
+
+ {
+ /* Total number of samples in input matrix */
+ numSamples = (uint32_t) pSrcA->numRows * pSrcA->numCols;
+
+#if defined (ARM_MATH_LOOPUNROLL)
+
+ /* Loop unrolling: Compute 4 outputs at a time */
+ blkCnt = numSamples >> 2U;
+
+ while (blkCnt > 0U)
+ {
+ /* C(m,n) = A(m,n) - B(m,n) */
+
+ /* Subtract, Saturate and store result in destination buffer. */
+#if defined (ARM_MATH_DSP)
+ write_q15x2_ia (&pOut, __QSUB16(read_q15x2_ia ((q15_t **) &pInA), read_q15x2_ia ((q15_t **) &pInB)));
+ write_q15x2_ia (&pOut, __QSUB16(read_q15x2_ia ((q15_t **) &pInA), read_q15x2_ia ((q15_t **) &pInB)));
+#else
+ *pOut++ = (q15_t) __SSAT(((q31_t) * pInA++ - *pInB++), 16);
+ *pOut++ = (q15_t) __SSAT(((q31_t) * pInA++ - *pInB++), 16);
+ *pOut++ = (q15_t) __SSAT(((q31_t) * pInA++ - *pInB++), 16);
+ *pOut++ = (q15_t) __SSAT(((q31_t) * pInA++ - *pInB++), 16);
+#endif
+
+ /* 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)
+ {
+ /* C(m,n) = A(m,n) - B(m,n) */
+
+ /* Subtract and store result in destination buffer. */
+#if defined (ARM_MATH_DSP)
+ *pOut++ = (q15_t) __QSUB16(*pInA++, *pInB++);
+#else
+ *pOut++ = (q15_t) __SSAT(((q31_t) * pInA++ - *pInB++), 16);
+#endif
+
+ /* Decrement loop counter */
+ blkCnt--;
+ }
+
+ /* Set status as ARM_MATH_SUCCESS */
+ status = ARM_MATH_SUCCESS;
+ }
+
+ /* Return to application */
+ return (status);
+}
+
+/**
+ @} end of MatrixSub group
+ */
|