CMSIS DSP Software Library: arm_mat_add_q31.c Source File
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arm_mat_add_q31.c
Go to the documentation of this file.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_q31.c
00009 *
00010 * Description: Q31 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
00058 arm_status arm_mat_add_q31(
00059 const arm_matrix_instance_q31 * pSrcA,
00060 const arm_matrix_instance_q31 * pSrcB,
00061 arm_matrix_instance_q31 * pDst)
00062 {
00063 q31_t *pIn1 = pSrcA->pData; /* input data matrix pointer A */
00064 q31_t *pIn2 = pSrcB->pData; /* input data matrix pointer B */
00065 q31_t *pOut = pDst->pData; /* output data matrix pointer */
00066 uint32_t numSamples; /* total number of elements in the matrix */
00067 uint32_t blkCnt; /* loop counters */
00068 arm_status status; /* status of matrix addition */
00069
00070 #ifdef ARM_MATH_MATRIX_CHECK
00071 /* Check for matrix mismatch condition */
00072 if((pSrcA->numRows != pSrcB->numRows) ||
00073 (pSrcA->numCols != pSrcB->numCols) ||
00074 (pSrcA->numRows != pDst->numRows) || (pSrcA->numCols != pDst->numCols))
00075 {
00076 /* Set status as ARM_MATH_SIZE_MISMATCH */
00077 status = ARM_MATH_SIZE_MISMATCH;
00078 }
00079 else
00080 #endif
00081 {
00082 /* Total number of samples in the input matrix */
00083 numSamples = (uint32_t) pSrcA->numRows * pSrcA->numCols;
00084
00085 /* Loop Unrolling */
00086 blkCnt = numSamples >> 2u;
00087
00088
00089 /* First part of the processing with loop unrolling. Compute 4 outputs at a time.
00090 ** a second loop below computes the remaining 1 to 3 samples. */
00091 while(blkCnt > 0u)
00092 {
00093 /* C(m,n) = A(m,n) + B(m,n) */
00094 /* Add, saturate and then store the results in the destination buffer. */
00095 *pOut++ = __QADD(*pIn1++, *pIn2++);
00096 *pOut++ = __QADD(*pIn1++, *pIn2++);
00097 *pOut++ = __QADD(*pIn1++, *pIn2++);
00098 *pOut++ = __QADD(*pIn1++, *pIn2++);
00099
00100 /* Decrement the loop counter */
00101 blkCnt--;
00102 }
00103
00104 /* If the numSamples is not a multiple of 4, compute any remaining output samples here.
00105 ** No loop unrolling is used. */
00106 blkCnt = numSamples % 0x4u;
00107
00108 while(blkCnt > 0u)
00109 {
00110 /* C(m,n) = A(m,n) + B(m,n) */
00111 /* Add, saturate and then store the results in the destination buffer. */
00112 *pOut++ = __QADD(*pIn1++, *pIn2++);
00113
00114 /* Decrement the loop counter */
00115 blkCnt--;
00116 }
00117
00118 /* set status as ARM_MATH_SUCCESS */
00119 status = ARM_MATH_SUCCESS;
00120 }
00121
00122 /* Return to application */
00123 return (status);
00124 }
00125
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