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Diffstat (limited to 'src/modules/mathlib/CMSIS/DSP_Lib/Source/MatrixFunctions/arm_mat_sub_q31.c')
| -rw-r--r-- | src/modules/mathlib/CMSIS/DSP_Lib/Source/MatrixFunctions/arm_mat_sub_q31.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/src/modules/mathlib/CMSIS/DSP_Lib/Source/MatrixFunctions/arm_mat_sub_q31.c b/src/modules/mathlib/CMSIS/DSP_Lib/Source/MatrixFunctions/arm_mat_sub_q31.c new file mode 100644 index 000000000..279fd7f7c --- /dev/null +++ b/src/modules/mathlib/CMSIS/DSP_Lib/Source/MatrixFunctions/arm_mat_sub_q31.c @@ -0,0 +1,206 @@ +/* ----------------------------------------------------------------------
+* Copyright (C) 2010 ARM Limited. All rights reserved.
+*
+* $Date: 15. February 2012
+* $Revision: V1.1.0
+*
+* Project: CMSIS DSP Library
+* Title: arm_mat_sub_q31.c
+*
+* Description: Q31 matrix subtraction
+*
+* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
+*
+* Version 1.1.0 2012/02/15
+* Updated with more optimizations, bug fixes and minor API changes.
+*
+* Version 1.0.10 2011/7/15
+* Big Endian support added and Merged M0 and M3/M4 Source code.
+*
+* Version 1.0.3 2010/11/29
+* Re-organized the CMSIS folders and updated documentation.
+*
+* Version 1.0.2 2010/11/11
+* Documentation updated.
+*
+* Version 1.0.1 2010/10/05
+* Production release and review comments incorporated.
+*
+* Version 1.0.0 2010/09/20
+* Production release and review comments incorporated.
+*
+* Version 0.0.5 2010/04/26
+* incorporated review comments and updated with latest CMSIS layer
+*
+* Version 0.0.3 2010/03/10
+* Initial version
+* -------------------------------------------------------------------- */
+
+#include "arm_math.h"
+
+/**
+ * @ingroup groupMatrix
+ */
+
+/**
+ * @addtogroup MatrixSub
+ * @{
+ */
+
+/**
+ * @brief Q31 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 The function returns either
+ * <code>ARM_MATH_SIZE_MISMATCH</code> or <code>ARM_MATH_SUCCESS</code> based on the outcome of size checking.
+ *
+ * <b>Scaling and Overflow Behavior:</b>
+ * \par
+ * The function uses saturating arithmetic.
+ * Results outside of the allowable Q31 range [0x80000000 0x7FFFFFFF] will be saturated.
+ */
+
+
+arm_status arm_mat_sub_q31(
+ const arm_matrix_instance_q31 * pSrcA,
+ const arm_matrix_instance_q31 * pSrcB,
+ arm_matrix_instance_q31 * pDst)
+{
+ q31_t *pIn1 = pSrcA->pData; /* input data matrix pointer A */
+ q31_t *pIn2 = pSrcB->pData; /* input data matrix pointer B */
+ q31_t *pOut = pDst->pData; /* output data matrix pointer */
+ q31_t inA1, inB1; /* temporary variables */
+
+#ifndef ARM_MATH_CM0
+
+ q31_t inA2, inB2; /* temporary variables */
+ q31_t out1, out2; /* temporary variables */
+
+#endif // #ifndef ARM_MATH_CM0
+
+ 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
+ {
+ /* Total number of samples in the input matrix */
+ numSamples = (uint32_t) pSrcA->numRows * pSrcA->numCols;
+
+#ifndef ARM_MATH_CM0
+
+ /* Run the below code for Cortex-M4 and Cortex-M3 */
+
+ /* Loop Unrolling */
+ blkCnt = numSamples >> 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(blkCnt > 0u)
+ {
+ /* C(m,n) = A(m,n) - B(m,n) */
+ /* Subtract, saturate and then store the results in the destination buffer. */
+ /* Read values from source A */
+ inA1 = pIn1[0];
+
+ /* Read values from source B */
+ inB1 = pIn2[0];
+
+ /* Read values from source A */
+ inA2 = pIn1[1];
+
+ /* Subtract and saturate */
+ out1 = __QSUB(inA1, inB1);
+
+ /* Read values from source B */
+ inB2 = pIn2[1];
+
+ /* Read values from source A */
+ inA1 = pIn1[2];
+
+ /* Subtract and saturate */
+ out2 = __QSUB(inA2, inB2);
+
+ /* Read values from source B */
+ inB1 = pIn2[2];
+
+ /* Store result in destination */
+ pOut[0] = out1;
+ pOut[1] = out2;
+
+ /* Read values from source A */
+ inA2 = pIn1[3];
+
+ /* Read values from source B */
+ inB2 = pIn2[3];
+
+ /* Subtract and saturate */
+ out1 = __QSUB(inA1, inB1);
+
+ /* Subtract and saturate */
+ out2 = __QSUB(inA2, inB2);
+
+ /* Store result in destination */
+ pOut[2] = out1;
+ pOut[3] = out2;
+
+ /* update pointers to process next samples */
+ pIn1 += 4u;
+ pIn2 += 4u;
+ pOut += 4u;
+
+ /* Decrement the loop counter */
+ blkCnt--;
+ }
+
+ /* If the numSamples is not a multiple of 4, compute any remaining output samples here.
+ ** No loop unrolling is used. */
+ blkCnt = numSamples % 0x4u;
+
+#else
+
+ /* Run the below code for Cortex-M0 */
+
+ /* Initialize blkCnt with number of samples */
+ blkCnt = numSamples;
+
+#endif /* #ifndef ARM_MATH_CM0 */
+
+ while(blkCnt > 0u)
+ {
+ /* C(m,n) = A(m,n) - B(m,n) */
+ /* Subtract, saturate and then store the results in the destination buffer. */
+ inA1 = *pIn1++;
+ inB1 = *pIn2++;
+
+ inA1 = __QSUB(inA1, inB1);
+
+ *pOut++ = inA1;
+
+ /* Decrement the loop counter */
+ blkCnt--;
+ }
+
+ /* Set status as ARM_MATH_SUCCESS */
+ status = ARM_MATH_SUCCESS;
+ }
+
+ /* Return to application */
+ return (status);
+}
+
+/**
+ * @} end of MatrixSub group
+ */
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