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# arm_mat_add_f32.c

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    00001 /* ----------------------------------------------------------------------------
    00002 * Copyright (C) 2010 ARM Limited. All rights reserved.
    00003 *
    00004 * $Date:        29. November 2010
    00005 * $Revision:    V1.0.3
    00006 *
    00007 * Project:      CMSIS DSP Library
    00008 * Title:        arm_mat_add_f32.c
    00009 *
    00010 * Description:  Floating-point matrix addition
    00011 *
    00012 * Target Processor: Cortex-M4/Cortex-M3
    00013 *
    00014 * Version 1.0.3 2010/11/29
    00015 *    Re-organized the CMSIS folders and updated documentation.
    00016 *
    00017 * Version 1.0.2 2010/11/11
    00018 *    Documentation updated.
    00019 *
    00020 * Version 1.0.1 2010/10/05
    00021 *    Production release and review comments incorporated.
    00022 *
    00023 * Version 1.0.0 2010/09/20
    00024 *    Production release and review comments incorporated.
    00025 *
    00026 * Version 0.0.5  2010/04/26
    00027 *    incorporated review comments and updated with latest CMSIS layer
    00028 *
    00029 * Version 0.0.3  2010/03/10
    00030 *    Initial version
    00031 * -------------------------------------------------------------------------- */
    00032
    00033 #include "arm_math.h"
    00034
    00065 arm_status arm_mat_add_f32(
    00066   const arm_matrix_instance_f32 * pSrcA,
    00067   const arm_matrix_instance_f32 * pSrcB,
    00068   arm_matrix_instance_f32 * pDst)
    00069 {
    00070   float32_t *pIn1 = pSrcA->pData;                /* input data matrix pointer A  */
    00071   float32_t *pIn2 = pSrcB->pData;                /* input data matrix pointer B  */
    00072   float32_t *pOut = pDst->pData;                 /* output data matrix pointer   */
    00073   uint32_t numSamples;                           /* total number of elements in the matrix  */
    00074   uint32_t blkCnt;                               /* loop counters */
    00075   arm_status status;                             /* status of matrix addition */
    00076
    00077 #ifdef ARM_MATH_MATRIX_CHECK
    00078   /* Check for matrix mismatch condition */
    00079   if((pSrcA->numRows != pSrcB->numRows) ||
    00080      (pSrcA->numCols != pSrcB->numCols) ||
    00081      (pSrcA->numRows != pDst->numRows) || (pSrcA->numCols != pDst->numCols))
    00082   {
    00083     /* Set status as ARM_MATH_SIZE_MISMATCH */
    00084     status = ARM_MATH_SIZE_MISMATCH;
    00085   }
    00086   else
    00087 #endif
    00088   {
    00089
    00090     /* Total number of samples in the input matrix */
    00091     numSamples = (uint32_t) pSrcA->numRows * pSrcA->numCols;
    00092
    00093     /* Loop unrolling */
    00094     blkCnt = numSamples >> 2u;
    00095
    00096     /* First part of the processing with loop unrolling.  Compute 4 outputs at a time.
    00097      ** a second loop below computes the remaining 1 to 3 samples. */
    00098     while(blkCnt > 0u)
    00099     {
    00100       /* C(m,n) = A(m,n) + B(m,n) */
    00101       /* Add and then store the results in the destination buffer. */
    00102       *pOut++ = (*pIn1++) + (*pIn2++);
    00103       *pOut++ = (*pIn1++) + (*pIn2++);
    00104       *pOut++ = (*pIn1++) + (*pIn2++);
    00105       *pOut++ = (*pIn1++) + (*pIn2++);
    00106
    00107       /* Decrement the loop counter */
    00108       blkCnt--;
    00109     }
    00110
    00111     /* If the numSamples is not a multiple of 4, compute any remaining output samples here.
    00112      ** No loop unrolling is used. */
    00113     blkCnt = numSamples % 0x4u;
    00114
    00115     while(blkCnt > 0u)
    00116     {
    00117       /* C(m,n) = A(m,n) + B(m,n) */
    00118       /* Add and then store the results in the destination buffer. */
    00119       *pOut++ = (*pIn1++) + (*pIn2++);
    00120
    00121       /* Decrement the loop counter */
    00122       blkCnt--;
    00123     }
    00124
    00125     /* set status as ARM_MATH_SUCCESS */
    00126     status = ARM_MATH_SUCCESS;
    00127
    00128   }
    00129
    00130   /* Return to application */
    00131   return (status);
    00132 }
    00133

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