CMSIS DSP Software Library: arm_mat_add_f32.c Source File

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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:        15. July 2011
    00005 * $Revision:    V1.0.10
    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/Cortex-M0
    00013 *
    00014 * Version 1.0.10 2011/7/15
    00015 *    Big Endian support added and Merged M0 and M3/M4 Source code.
    00016 *
    00017 * Version 1.0.3 2010/11/29
    00018 *    Re-organized the CMSIS folders and updated documentation.
    00019 *
    00020 * Version 1.0.2 2010/11/11
    00021 *    Documentation updated.
    00022 *
    00023 * Version 1.0.1 2010/10/05
    00024 *    Production release and review comments incorporated.
    00025 *
    00026 * Version 1.0.0 2010/09/20
    00027 *    Production release and review comments incorporated.
    00028 *
    00029 * Version 0.0.5  2010/04/26
    00030 *    incorporated review comments and updated with latest CMSIS layer
    00031 *
    00032 * Version 0.0.3  2010/03/10
    00033 *    Initial version
    00034 * -------------------------------------------------------------------------- */
    00035
    00036 #include "arm_math.h"
    00037
    00068 arm_status arm_mat_add_f32(
    00069   const arm_matrix_instance_f32 * pSrcA,
    00070   const arm_matrix_instance_f32 * pSrcB,
    00071   arm_matrix_instance_f32 * pDst)
    00072 {
    00073   float32_t *pIn1 = pSrcA->pData;                /* input data matrix pointer A  */
    00074   float32_t *pIn2 = pSrcB->pData;                /* input data matrix pointer B  */
    00075   float32_t *pOut = pDst->pData;                 /* output data matrix pointer   */
    00076   uint32_t numSamples;                           /* total number of elements in the matrix  */
    00077   uint32_t blkCnt;                               /* loop counters */
    00078   arm_status status;                             /* status of matrix addition */
    00079
    00080 #ifdef ARM_MATH_MATRIX_CHECK
    00081
    00082
    00083   /* Check for matrix mismatch condition */
    00084   if((pSrcA->numRows != pSrcB->numRows) ||
    00085      (pSrcA->numCols != pSrcB->numCols) ||
    00086      (pSrcA->numRows != pDst->numRows) || (pSrcA->numCols != pDst->numCols))
    00087   {
    00088     /* Set status as ARM_MATH_SIZE_MISMATCH */
    00089     status = ARM_MATH_SIZE_MISMATCH;
    00090   }
    00091   else
    00092 #endif /*    #ifdef ARM_MATH_MATRIX_CHECK    */
    00093
    00094   {
    00095
    00096     /* Total number of samples in the input matrix */
    00097     numSamples = (uint32_t) pSrcA->numRows * pSrcA->numCols;
    00098
    00099 #ifndef ARM_MATH_CM0
    00100
    00101     /* Run the below code for Cortex-M4 and Cortex-M3 */
    00102
    00103     /* Loop unrolling */
    00104     blkCnt = numSamples >> 2u;
    00105
    00106     /* First part of the processing with loop unrolling.  Compute 4 outputs at a time.
    00107      ** a second loop below computes the remaining 1 to 3 samples. */
    00108     while(blkCnt > 0u)
    00109     {
    00110       /* C(m,n) = A(m,n) + B(m,n) */
    00111       /* Add and then store the results in the destination buffer. */
    00112       *pOut++ = (*pIn1++) + (*pIn2++);
    00113       *pOut++ = (*pIn1++) + (*pIn2++);
    00114       *pOut++ = (*pIn1++) + (*pIn2++);
    00115       *pOut++ = (*pIn1++) + (*pIn2++);
    00116
    00117       /* Decrement the loop counter */
    00118       blkCnt--;
    00119     }
    00120
    00121     /* If the numSamples is not a multiple of 4, compute any remaining output samples here.
    00122      ** No loop unrolling is used. */
    00123     blkCnt = numSamples % 0x4u;
    00124
    00125 #else
    00126
    00127     /* Run the below code for Cortex-M0 */
    00128
    00129     /* Initialize blkCnt with number of samples */
    00130     blkCnt = numSamples;
    00131
    00132 #endif /* #ifndef ARM_MATH_CM0 */
    00133
    00134     while(blkCnt > 0u)
    00135     {
    00136       /* C(m,n) = A(m,n) + B(m,n) */
    00137       /* Add and then store the results in the destination buffer. */
    00138       *pOut++ = (*pIn1++) + (*pIn2++);
    00139
    00140       /* Decrement the loop counter */
    00141       blkCnt--;
    00142     }
    00143     /* set status as ARM_MATH_SUCCESS */
    00144     status = ARM_MATH_SUCCESS;
    00145
    00146   }
    00147
    00148   /* Return to application */
    00149   return (status);
    00150 }
    00151

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