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| 2 | mjames | 1 | /* ---------------------------------------------------------------------- |
| 2 | * Copyright (C) 2010-2014 ARM Limited. All rights reserved. |
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| 3 | * |
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| 4 | * $Date: 19. March 2015 |
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| 5 | * $Revision: V.1.4.5 |
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| 6 | * |
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| 7 | * Project: CMSIS DSP Library |
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| 8 | * Title: arm_mat_add_q31.c |
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| 9 | * |
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| 10 | * Description: Q31 matrix addition |
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| 11 | * |
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| 12 | * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 |
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| 13 | * |
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| 14 | * Redistribution and use in source and binary forms, with or without |
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| 15 | * modification, are permitted provided that the following conditions |
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| 16 | * are met: |
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| 17 | * - Redistributions of source code must retain the above copyright |
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| 18 | * notice, this list of conditions and the following disclaimer. |
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| 19 | * - Redistributions in binary form must reproduce the above copyright |
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| 20 | * notice, this list of conditions and the following disclaimer in |
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| 21 | * the documentation and/or other materials provided with the |
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| 22 | * distribution. |
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| 23 | * - Neither the name of ARM LIMITED nor the names of its contributors |
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| 24 | * may be used to endorse or promote products derived from this |
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| 25 | * software without specific prior written permission. |
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| 26 | * |
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| 27 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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| 28 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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| 29 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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| 30 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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| 31 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 32 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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| 33 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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| 34 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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| 35 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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| 37 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 38 | * POSSIBILITY OF SUCH DAMAGE. |
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| 39 | * -------------------------------------------------------------------- */ |
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| 40 | |||
| 41 | #include "arm_math.h" |
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| 42 | |||
| 43 | /** |
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| 44 | * @ingroup groupMatrix |
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| 45 | */ |
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| 46 | |||
| 47 | /** |
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| 48 | * @addtogroup MatrixAdd |
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| 49 | * @{ |
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| 50 | */ |
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| 51 | |||
| 52 | /** |
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| 53 | * @brief Q31 matrix addition. |
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| 54 | * @param[in] *pSrcA points to the first input matrix structure |
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| 55 | * @param[in] *pSrcB points to the second input matrix structure |
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| 56 | * @param[out] *pDst points to output matrix structure |
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| 57 | * @return The function returns either |
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| 58 | * <code>ARM_MATH_SIZE_MISMATCH</code> or <code>ARM_MATH_SUCCESS</code> based on the outcome of size checking. |
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| 59 | * |
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| 60 | * <b>Scaling and Overflow Behavior:</b> |
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| 61 | * \par |
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| 62 | * The function uses saturating arithmetic. |
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| 63 | * Results outside of the allowable Q31 range [0x80000000 0x7FFFFFFF] will be saturated. |
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| 64 | */ |
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| 65 | |||
| 66 | arm_status arm_mat_add_q31( |
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| 67 | const arm_matrix_instance_q31 * pSrcA, |
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| 68 | const arm_matrix_instance_q31 * pSrcB, |
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| 69 | arm_matrix_instance_q31 * pDst) |
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| 70 | { |
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| 71 | q31_t *pIn1 = pSrcA->pData; /* input data matrix pointer A */ |
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| 72 | q31_t *pIn2 = pSrcB->pData; /* input data matrix pointer B */ |
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| 73 | q31_t *pOut = pDst->pData; /* output data matrix pointer */ |
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| 74 | q31_t inA1, inB1; /* temporary variables */ |
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| 75 | |||
| 76 | #ifndef ARM_MATH_CM0_FAMILY |
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| 77 | |||
| 78 | q31_t inA2, inB2; /* temporary variables */ |
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| 79 | q31_t out1, out2; /* temporary variables */ |
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| 80 | |||
| 81 | #endif // #ifndef ARM_MATH_CM0_FAMILY |
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| 82 | |||
| 83 | uint32_t numSamples; /* total number of elements in the matrix */ |
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| 84 | uint32_t blkCnt; /* loop counters */ |
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| 85 | arm_status status; /* status of matrix addition */ |
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| 86 | |||
| 87 | #ifdef ARM_MATH_MATRIX_CHECK |
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| 88 | /* Check for matrix mismatch condition */ |
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| 89 | if((pSrcA->numRows != pSrcB->numRows) || |
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| 90 | (pSrcA->numCols != pSrcB->numCols) || |
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| 91 | (pSrcA->numRows != pDst->numRows) || (pSrcA->numCols != pDst->numCols)) |
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| 92 | { |
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| 93 | /* Set status as ARM_MATH_SIZE_MISMATCH */ |
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| 94 | status = ARM_MATH_SIZE_MISMATCH; |
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| 95 | } |
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| 96 | else |
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| 97 | #endif |
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| 98 | { |
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| 99 | /* Total number of samples in the input matrix */ |
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| 100 | numSamples = (uint32_t) pSrcA->numRows * pSrcA->numCols; |
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| 101 | |||
| 102 | #ifndef ARM_MATH_CM0_FAMILY |
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| 103 | |||
| 104 | /* Run the below code for Cortex-M4 and Cortex-M3 */ |
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| 105 | |||
| 106 | /* Loop Unrolling */ |
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| 107 | blkCnt = numSamples >> 2u; |
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| 108 | |||
| 109 | |||
| 110 | /* First part of the processing with loop unrolling. Compute 4 outputs at a time. |
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| 111 | ** a second loop below computes the remaining 1 to 3 samples. */ |
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| 112 | while(blkCnt > 0u) |
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| 113 | { |
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| 114 | /* C(m,n) = A(m,n) + B(m,n) */ |
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| 115 | /* Add, saturate and then store the results in the destination buffer. */ |
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| 116 | /* Read values from source A */ |
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| 117 | inA1 = pIn1[0]; |
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| 118 | |||
| 119 | /* Read values from source B */ |
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| 120 | inB1 = pIn2[0]; |
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| 121 | |||
| 122 | /* Read values from source A */ |
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| 123 | inA2 = pIn1[1]; |
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| 124 | |||
| 125 | /* Add and saturate */ |
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| 126 | out1 = __QADD(inA1, inB1); |
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| 127 | |||
| 128 | /* Read values from source B */ |
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| 129 | inB2 = pIn2[1]; |
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| 130 | |||
| 131 | /* Read values from source A */ |
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| 132 | inA1 = pIn1[2]; |
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| 133 | |||
| 134 | /* Add and saturate */ |
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| 135 | out2 = __QADD(inA2, inB2); |
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| 136 | |||
| 137 | /* Read values from source B */ |
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| 138 | inB1 = pIn2[2]; |
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| 139 | |||
| 140 | /* Store result in destination */ |
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| 141 | pOut[0] = out1; |
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| 142 | pOut[1] = out2; |
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| 143 | |||
| 144 | /* Read values from source A */ |
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| 145 | inA2 = pIn1[3]; |
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| 146 | |||
| 147 | /* Read values from source B */ |
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| 148 | inB2 = pIn2[3]; |
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| 149 | |||
| 150 | /* Add and saturate */ |
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| 151 | out1 = __QADD(inA1, inB1); |
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| 152 | out2 = __QADD(inA2, inB2); |
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| 153 | |||
| 154 | /* Store result in destination */ |
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| 155 | pOut[2] = out1; |
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| 156 | pOut[3] = out2; |
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| 157 | |||
| 158 | /* update pointers to process next sampels */ |
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| 159 | pIn1 += 4u; |
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| 160 | pIn2 += 4u; |
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| 161 | pOut += 4u; |
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| 162 | |||
| 163 | /* Decrement the loop counter */ |
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| 164 | blkCnt--; |
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| 165 | } |
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| 166 | |||
| 167 | /* If the numSamples is not a multiple of 4, compute any remaining output samples here. |
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| 168 | ** No loop unrolling is used. */ |
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| 169 | blkCnt = numSamples % 0x4u; |
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| 170 | |||
| 171 | #else |
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| 172 | |||
| 173 | /* Run the below code for Cortex-M0 */ |
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| 174 | |||
| 175 | /* Initialize blkCnt with number of samples */ |
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| 176 | blkCnt = numSamples; |
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| 177 | |||
| 178 | |||
| 179 | #endif /* #ifndef ARM_MATH_CM0_FAMILY */ |
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| 180 | |||
| 181 | while(blkCnt > 0u) |
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| 182 | { |
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| 183 | /* C(m,n) = A(m,n) + B(m,n) */ |
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| 184 | /* Add, saturate and then store the results in the destination buffer. */ |
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| 185 | inA1 = *pIn1++; |
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| 186 | inB1 = *pIn2++; |
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| 187 | |||
| 188 | inA1 = __QADD(inA1, inB1); |
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| 189 | |||
| 190 | /* Decrement the loop counter */ |
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| 191 | blkCnt--; |
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| 192 | |||
| 193 | *pOut++ = inA1; |
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| 194 | |||
| 195 | } |
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| 196 | |||
| 197 | /* set status as ARM_MATH_SUCCESS */ |
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| 198 | status = ARM_MATH_SUCCESS; |
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| 199 | } |
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| 200 | |||
| 201 | /* Return to application */ |
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| 202 | return (status); |
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| 203 | } |
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| 204 | |||
| 205 | /** |
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| 206 | * @} end of MatrixAdd group |
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| 207 | */ |