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| 2 | mjames | 1 | /* |
| 2 | * Copyright (C) 2010-2018 Arm Limited or its affiliates. All rights reserved. |
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| 3 | * |
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| 4 | * SPDX-License-Identifier: Apache-2.0 |
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| 5 | * |
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| 6 | * Licensed under the Apache License, Version 2.0 (the License); you may |
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| 7 | * not use this file except in compliance with the License. |
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| 8 | * You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an AS IS BASIS, WITHOUT |
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| 14 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | |||
| 19 | /* ---------------------------------------------------------------------- |
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| 20 | * Project: CMSIS NN Library |
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| 21 | * Title: arm_q7_to_q15_no_shift.c |
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| 22 | * Description: Converts the elements of the Q7 vector to Q15 vector without left-shift |
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| 23 | * |
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| 24 | * $Date: 17. January 2018 |
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| 25 | * $Revision: V.1.0.0 |
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| 26 | * |
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| 27 | * Target Processor: Cortex-M cores |
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| 28 | * |
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| 29 | * -------------------------------------------------------------------- */ |
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| 30 | |||
| 31 | #include "arm_nnsupportfunctions.h" |
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| 32 | |||
| 33 | /** |
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| 34 | * @ingroup groupSupport |
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| 35 | */ |
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| 36 | |||
| 37 | /** |
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| 38 | * @addtogroup nndata_convert |
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| 39 | * @{ |
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| 40 | */ |
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| 41 | |||
| 42 | /** |
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| 43 | * @brief Converts the elements of the Q7 vector to Q15 vector without left-shift |
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| 44 | * @param[in] *pSrc points to the Q7 input vector |
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| 45 | * @param[out] *pDst points to the Q15 output vector |
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| 46 | * @param[in] blockSize length of the input vector |
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| 47 | * @return none. |
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| 48 | * |
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| 49 | * \par Description: |
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| 50 | * |
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| 51 | * The equation used for the conversion process is: |
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| 52 | * |
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| 53 | * <pre> |
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| 54 | * pDst[n] = (q15_t) pSrc[n]; 0 <= n < blockSize. |
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| 55 | * </pre> |
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| 56 | * |
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| 57 | */ |
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| 58 | |||
| 59 | void arm_q7_to_q15_no_shift(const q7_t * pSrc, q15_t * pDst, uint32_t blockSize) |
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| 60 | { |
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| 61 | const q7_t *pIn = pSrc; /* Src pointer */ |
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| 62 | uint32_t blkCnt; /* loop counter */ |
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| 63 | |||
| 64 | #ifndef ARM_MATH_CM0_FAMILY |
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| 65 | q31_t in; |
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| 66 | q31_t in1, in2; |
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| 67 | q31_t out1, out2; |
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| 68 | |||
| 69 | /* Run the below code for Cortex-M4 and Cortex-M3 */ |
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| 70 | |||
| 71 | /*loop Unrolling */ |
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| 72 | blkCnt = blockSize >> 2u; |
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| 73 | |||
| 74 | /* First part of the processing with loop unrolling. Compute 4 outputs at a time. |
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| 75 | ** a second loop below computes the remaining 1 to 3 samples. */ |
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| 76 | while (blkCnt > 0u) |
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| 77 | { |
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| 78 | /* C = (q15_t) A << 8 */ |
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| 79 | /* convert from q7 to q15 and then store the results in the destination buffer */ |
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| 80 | in = *__SIMD32(pIn)++; |
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| 81 | |||
| 82 | /* rotatate in by 8 and extend two q7_t values to q15_t values */ |
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| 83 | in1 = __SXTB16(__ROR(in, 8)); |
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| 84 | |||
| 85 | /* extend remainig two q7_t values to q15_t values */ |
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| 86 | in2 = __SXTB16(in); |
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| 87 | |||
| 88 | #ifndef ARM_MATH_BIG_ENDIAN |
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| 89 | |||
| 90 | out2 = __PKHTB(in1, in2, 16); |
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| 91 | out1 = __PKHBT(in2, in1, 16); |
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| 92 | |||
| 93 | #else |
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| 94 | |||
| 95 | out1 = __PKHTB(in1, in2, 16); |
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| 96 | out2 = __PKHBT(in2, in1, 16); |
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| 97 | |||
| 98 | #endif |
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| 99 | |||
| 100 | *__SIMD32(pDst)++ = out1; |
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| 101 | *__SIMD32(pDst)++ = out2; |
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| 102 | |||
| 103 | /* Decrement the loop counter */ |
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| 104 | blkCnt--; |
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| 105 | } |
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| 106 | |||
| 107 | /* If the blockSize is not a multiple of 4, compute any remaining output samples here. |
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| 108 | ** No loop unrolling is used. */ |
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| 109 | blkCnt = blockSize % 0x4u; |
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| 110 | |||
| 111 | #else |
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| 112 | |||
| 113 | /* Run the below code for Cortex-M0 */ |
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| 114 | |||
| 115 | /* Loop over blockSize number of values */ |
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| 116 | blkCnt = blockSize; |
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| 117 | |||
| 118 | #endif /* #ifndef ARM_MATH_CM0_FAMILY */ |
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| 119 | |||
| 120 | while (blkCnt > 0u) |
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| 121 | { |
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| 122 | /* C = (q15_t) A << 8 */ |
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| 123 | /* convert from q7 to q15 and then store the results in the destination buffer */ |
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| 124 | *pDst++ = (q15_t) * pIn++; |
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| 125 | |||
| 126 | /* Decrement the loop counter */ |
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| 127 | blkCnt--; |
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| 128 | } |
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| 129 | |||
| 130 | } |
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| 131 | |||
| 132 | /** |
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| 133 | * @} end of nndata_convert group |
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| 134 | */ |