V4.0.1 of the ARM CMSIS DSP libraries. Note that arm_bitreversal2.s, arm_cfft_f32.c and arm_rfft_fast_f32.c had to be removed. arm_bitreversal2.s will not assemble with the online tools. So, the fast f32 FFT functions are not yet available. All the other FFT functions are available.
Dependents: MPU9150_Example fir_f32 fir_f32 MPU9150_nucleo_noni2cdev ... more
MatrixFunctions/arm_mat_scale_q15.c@0:3d9c67d97d6f, 2014-07-28 (annotated)
- Committer:
- emh203
- Date:
- Mon Jul 28 15:03:15 2014 +0000
- Revision:
- 0:3d9c67d97d6f
1st working commit. Had to remove arm_bitreversal2.s arm_cfft_f32.c and arm_rfft_fast_f32.c. The .s will not assemble. For now I removed these functions so we could at least have a library for the other functions.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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emh203 | 0:3d9c67d97d6f | 1 | /* ---------------------------------------------------------------------- |
emh203 | 0:3d9c67d97d6f | 2 | * Copyright (C) 2010-2014 ARM Limited. All rights reserved. |
emh203 | 0:3d9c67d97d6f | 3 | * |
emh203 | 0:3d9c67d97d6f | 4 | * $Date: 12. March 2014 |
emh203 | 0:3d9c67d97d6f | 5 | * $Revision: V1.4.3 |
emh203 | 0:3d9c67d97d6f | 6 | * |
emh203 | 0:3d9c67d97d6f | 7 | * Project: CMSIS DSP Library |
emh203 | 0:3d9c67d97d6f | 8 | * Title: arm_mat_scale_q15.c |
emh203 | 0:3d9c67d97d6f | 9 | * |
emh203 | 0:3d9c67d97d6f | 10 | * Description: Multiplies a Q15 matrix by a scalar. |
emh203 | 0:3d9c67d97d6f | 11 | * |
emh203 | 0:3d9c67d97d6f | 12 | * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 |
emh203 | 0:3d9c67d97d6f | 13 | * |
emh203 | 0:3d9c67d97d6f | 14 | * Redistribution and use in source and binary forms, with or without |
emh203 | 0:3d9c67d97d6f | 15 | * modification, are permitted provided that the following conditions |
emh203 | 0:3d9c67d97d6f | 16 | * are met: |
emh203 | 0:3d9c67d97d6f | 17 | * - Redistributions of source code must retain the above copyright |
emh203 | 0:3d9c67d97d6f | 18 | * notice, this list of conditions and the following disclaimer. |
emh203 | 0:3d9c67d97d6f | 19 | * - Redistributions in binary form must reproduce the above copyright |
emh203 | 0:3d9c67d97d6f | 20 | * notice, this list of conditions and the following disclaimer in |
emh203 | 0:3d9c67d97d6f | 21 | * the documentation and/or other materials provided with the |
emh203 | 0:3d9c67d97d6f | 22 | * distribution. |
emh203 | 0:3d9c67d97d6f | 23 | * - Neither the name of ARM LIMITED nor the names of its contributors |
emh203 | 0:3d9c67d97d6f | 24 | * may be used to endorse or promote products derived from this |
emh203 | 0:3d9c67d97d6f | 25 | * software without specific prior written permission. |
emh203 | 0:3d9c67d97d6f | 26 | * |
emh203 | 0:3d9c67d97d6f | 27 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
emh203 | 0:3d9c67d97d6f | 28 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
emh203 | 0:3d9c67d97d6f | 29 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
emh203 | 0:3d9c67d97d6f | 30 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
emh203 | 0:3d9c67d97d6f | 31 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
emh203 | 0:3d9c67d97d6f | 32 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
emh203 | 0:3d9c67d97d6f | 33 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
emh203 | 0:3d9c67d97d6f | 34 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
emh203 | 0:3d9c67d97d6f | 35 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
emh203 | 0:3d9c67d97d6f | 36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
emh203 | 0:3d9c67d97d6f | 37 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
emh203 | 0:3d9c67d97d6f | 38 | * POSSIBILITY OF SUCH DAMAGE. |
emh203 | 0:3d9c67d97d6f | 39 | * -------------------------------------------------------------------- */ |
emh203 | 0:3d9c67d97d6f | 40 | |
emh203 | 0:3d9c67d97d6f | 41 | #include "arm_math.h" |
emh203 | 0:3d9c67d97d6f | 42 | |
emh203 | 0:3d9c67d97d6f | 43 | /** |
emh203 | 0:3d9c67d97d6f | 44 | * @ingroup groupMatrix |
emh203 | 0:3d9c67d97d6f | 45 | */ |
emh203 | 0:3d9c67d97d6f | 46 | |
emh203 | 0:3d9c67d97d6f | 47 | /** |
emh203 | 0:3d9c67d97d6f | 48 | * @addtogroup MatrixScale |
emh203 | 0:3d9c67d97d6f | 49 | * @{ |
emh203 | 0:3d9c67d97d6f | 50 | */ |
emh203 | 0:3d9c67d97d6f | 51 | |
emh203 | 0:3d9c67d97d6f | 52 | /** |
emh203 | 0:3d9c67d97d6f | 53 | * @brief Q15 matrix scaling. |
emh203 | 0:3d9c67d97d6f | 54 | * @param[in] *pSrc points to input matrix |
emh203 | 0:3d9c67d97d6f | 55 | * @param[in] scaleFract fractional portion of the scale factor |
emh203 | 0:3d9c67d97d6f | 56 | * @param[in] shift number of bits to shift the result by |
emh203 | 0:3d9c67d97d6f | 57 | * @param[out] *pDst points to output matrix structure |
emh203 | 0:3d9c67d97d6f | 58 | * @return The function returns either |
emh203 | 0:3d9c67d97d6f | 59 | * <code>ARM_MATH_SIZE_MISMATCH</code> or <code>ARM_MATH_SUCCESS</code> based on the outcome of size checking. |
emh203 | 0:3d9c67d97d6f | 60 | * |
emh203 | 0:3d9c67d97d6f | 61 | * @details |
emh203 | 0:3d9c67d97d6f | 62 | * <b>Scaling and Overflow Behavior:</b> |
emh203 | 0:3d9c67d97d6f | 63 | * \par |
emh203 | 0:3d9c67d97d6f | 64 | * The input data <code>*pSrc</code> and <code>scaleFract</code> are in 1.15 format. |
emh203 | 0:3d9c67d97d6f | 65 | * These are multiplied to yield a 2.30 intermediate result and this is shifted with saturation to 1.15 format. |
emh203 | 0:3d9c67d97d6f | 66 | */ |
emh203 | 0:3d9c67d97d6f | 67 | |
emh203 | 0:3d9c67d97d6f | 68 | arm_status arm_mat_scale_q15( |
emh203 | 0:3d9c67d97d6f | 69 | const arm_matrix_instance_q15 * pSrc, |
emh203 | 0:3d9c67d97d6f | 70 | q15_t scaleFract, |
emh203 | 0:3d9c67d97d6f | 71 | int32_t shift, |
emh203 | 0:3d9c67d97d6f | 72 | arm_matrix_instance_q15 * pDst) |
emh203 | 0:3d9c67d97d6f | 73 | { |
emh203 | 0:3d9c67d97d6f | 74 | q15_t *pIn = pSrc->pData; /* input data matrix pointer */ |
emh203 | 0:3d9c67d97d6f | 75 | q15_t *pOut = pDst->pData; /* output data matrix pointer */ |
emh203 | 0:3d9c67d97d6f | 76 | uint32_t numSamples; /* total number of elements in the matrix */ |
emh203 | 0:3d9c67d97d6f | 77 | int32_t totShift = 15 - shift; /* total shift to apply after scaling */ |
emh203 | 0:3d9c67d97d6f | 78 | uint32_t blkCnt; /* loop counters */ |
emh203 | 0:3d9c67d97d6f | 79 | arm_status status; /* status of matrix scaling */ |
emh203 | 0:3d9c67d97d6f | 80 | |
emh203 | 0:3d9c67d97d6f | 81 | #ifndef ARM_MATH_CM0_FAMILY |
emh203 | 0:3d9c67d97d6f | 82 | |
emh203 | 0:3d9c67d97d6f | 83 | q15_t in1, in2, in3, in4; |
emh203 | 0:3d9c67d97d6f | 84 | q31_t out1, out2, out3, out4; |
emh203 | 0:3d9c67d97d6f | 85 | q31_t inA1, inA2; |
emh203 | 0:3d9c67d97d6f | 86 | |
emh203 | 0:3d9c67d97d6f | 87 | #endif // #ifndef ARM_MATH_CM0_FAMILY |
emh203 | 0:3d9c67d97d6f | 88 | |
emh203 | 0:3d9c67d97d6f | 89 | #ifdef ARM_MATH_MATRIX_CHECK |
emh203 | 0:3d9c67d97d6f | 90 | /* Check for matrix mismatch */ |
emh203 | 0:3d9c67d97d6f | 91 | if((pSrc->numRows != pDst->numRows) || (pSrc->numCols != pDst->numCols)) |
emh203 | 0:3d9c67d97d6f | 92 | { |
emh203 | 0:3d9c67d97d6f | 93 | /* Set status as ARM_MATH_SIZE_MISMATCH */ |
emh203 | 0:3d9c67d97d6f | 94 | status = ARM_MATH_SIZE_MISMATCH; |
emh203 | 0:3d9c67d97d6f | 95 | } |
emh203 | 0:3d9c67d97d6f | 96 | else |
emh203 | 0:3d9c67d97d6f | 97 | #endif // #ifdef ARM_MATH_MATRIX_CHECK |
emh203 | 0:3d9c67d97d6f | 98 | { |
emh203 | 0:3d9c67d97d6f | 99 | /* Total number of samples in the input matrix */ |
emh203 | 0:3d9c67d97d6f | 100 | numSamples = (uint32_t) pSrc->numRows * pSrc->numCols; |
emh203 | 0:3d9c67d97d6f | 101 | |
emh203 | 0:3d9c67d97d6f | 102 | #ifndef ARM_MATH_CM0_FAMILY |
emh203 | 0:3d9c67d97d6f | 103 | |
emh203 | 0:3d9c67d97d6f | 104 | /* Run the below code for Cortex-M4 and Cortex-M3 */ |
emh203 | 0:3d9c67d97d6f | 105 | /* Loop Unrolling */ |
emh203 | 0:3d9c67d97d6f | 106 | blkCnt = numSamples >> 2; |
emh203 | 0:3d9c67d97d6f | 107 | |
emh203 | 0:3d9c67d97d6f | 108 | /* First part of the processing with loop unrolling. Compute 4 outputs at a time. |
emh203 | 0:3d9c67d97d6f | 109 | ** a second loop below computes the remaining 1 to 3 samples. */ |
emh203 | 0:3d9c67d97d6f | 110 | while(blkCnt > 0u) |
emh203 | 0:3d9c67d97d6f | 111 | { |
emh203 | 0:3d9c67d97d6f | 112 | /* C(m,n) = A(m,n) * k */ |
emh203 | 0:3d9c67d97d6f | 113 | /* Scale, saturate and then store the results in the destination buffer. */ |
emh203 | 0:3d9c67d97d6f | 114 | /* Reading 2 inputs from memory */ |
emh203 | 0:3d9c67d97d6f | 115 | inA1 = _SIMD32_OFFSET(pIn); |
emh203 | 0:3d9c67d97d6f | 116 | inA2 = _SIMD32_OFFSET(pIn + 2); |
emh203 | 0:3d9c67d97d6f | 117 | |
emh203 | 0:3d9c67d97d6f | 118 | /* C = A * scale */ |
emh203 | 0:3d9c67d97d6f | 119 | /* Scale the inputs and then store the 2 results in the destination buffer |
emh203 | 0:3d9c67d97d6f | 120 | * in single cycle by packing the outputs */ |
emh203 | 0:3d9c67d97d6f | 121 | out1 = (q31_t) ((q15_t) (inA1 >> 16) * scaleFract); |
emh203 | 0:3d9c67d97d6f | 122 | out2 = (q31_t) ((q15_t) inA1 * scaleFract); |
emh203 | 0:3d9c67d97d6f | 123 | out3 = (q31_t) ((q15_t) (inA2 >> 16) * scaleFract); |
emh203 | 0:3d9c67d97d6f | 124 | out4 = (q31_t) ((q15_t) inA2 * scaleFract); |
emh203 | 0:3d9c67d97d6f | 125 | |
emh203 | 0:3d9c67d97d6f | 126 | out1 = out1 >> totShift; |
emh203 | 0:3d9c67d97d6f | 127 | inA1 = _SIMD32_OFFSET(pIn + 4); |
emh203 | 0:3d9c67d97d6f | 128 | out2 = out2 >> totShift; |
emh203 | 0:3d9c67d97d6f | 129 | inA2 = _SIMD32_OFFSET(pIn + 6); |
emh203 | 0:3d9c67d97d6f | 130 | out3 = out3 >> totShift; |
emh203 | 0:3d9c67d97d6f | 131 | out4 = out4 >> totShift; |
emh203 | 0:3d9c67d97d6f | 132 | |
emh203 | 0:3d9c67d97d6f | 133 | in1 = (q15_t) (__SSAT(out1, 16)); |
emh203 | 0:3d9c67d97d6f | 134 | in2 = (q15_t) (__SSAT(out2, 16)); |
emh203 | 0:3d9c67d97d6f | 135 | in3 = (q15_t) (__SSAT(out3, 16)); |
emh203 | 0:3d9c67d97d6f | 136 | in4 = (q15_t) (__SSAT(out4, 16)); |
emh203 | 0:3d9c67d97d6f | 137 | |
emh203 | 0:3d9c67d97d6f | 138 | _SIMD32_OFFSET(pOut) = __PKHBT(in2, in1, 16); |
emh203 | 0:3d9c67d97d6f | 139 | _SIMD32_OFFSET(pOut + 2) = __PKHBT(in4, in3, 16); |
emh203 | 0:3d9c67d97d6f | 140 | |
emh203 | 0:3d9c67d97d6f | 141 | /* update pointers to process next sampels */ |
emh203 | 0:3d9c67d97d6f | 142 | pIn += 4u; |
emh203 | 0:3d9c67d97d6f | 143 | pOut += 4u; |
emh203 | 0:3d9c67d97d6f | 144 | |
emh203 | 0:3d9c67d97d6f | 145 | |
emh203 | 0:3d9c67d97d6f | 146 | /* Decrement the numSamples loop counter */ |
emh203 | 0:3d9c67d97d6f | 147 | blkCnt--; |
emh203 | 0:3d9c67d97d6f | 148 | } |
emh203 | 0:3d9c67d97d6f | 149 | |
emh203 | 0:3d9c67d97d6f | 150 | /* If the numSamples is not a multiple of 4, compute any remaining output samples here. |
emh203 | 0:3d9c67d97d6f | 151 | ** No loop unrolling is used. */ |
emh203 | 0:3d9c67d97d6f | 152 | blkCnt = numSamples % 0x4u; |
emh203 | 0:3d9c67d97d6f | 153 | |
emh203 | 0:3d9c67d97d6f | 154 | #else |
emh203 | 0:3d9c67d97d6f | 155 | |
emh203 | 0:3d9c67d97d6f | 156 | /* Run the below code for Cortex-M0 */ |
emh203 | 0:3d9c67d97d6f | 157 | |
emh203 | 0:3d9c67d97d6f | 158 | /* Initialize blkCnt with number of samples */ |
emh203 | 0:3d9c67d97d6f | 159 | blkCnt = numSamples; |
emh203 | 0:3d9c67d97d6f | 160 | |
emh203 | 0:3d9c67d97d6f | 161 | #endif /* #ifndef ARM_MATH_CM0_FAMILY */ |
emh203 | 0:3d9c67d97d6f | 162 | |
emh203 | 0:3d9c67d97d6f | 163 | while(blkCnt > 0u) |
emh203 | 0:3d9c67d97d6f | 164 | { |
emh203 | 0:3d9c67d97d6f | 165 | /* C(m,n) = A(m,n) * k */ |
emh203 | 0:3d9c67d97d6f | 166 | /* Scale, saturate and then store the results in the destination buffer. */ |
emh203 | 0:3d9c67d97d6f | 167 | *pOut++ = |
emh203 | 0:3d9c67d97d6f | 168 | (q15_t) (__SSAT(((q31_t) (*pIn++) * scaleFract) >> totShift, 16)); |
emh203 | 0:3d9c67d97d6f | 169 | |
emh203 | 0:3d9c67d97d6f | 170 | /* Decrement the numSamples loop counter */ |
emh203 | 0:3d9c67d97d6f | 171 | blkCnt--; |
emh203 | 0:3d9c67d97d6f | 172 | } |
emh203 | 0:3d9c67d97d6f | 173 | /* Set status as ARM_MATH_SUCCESS */ |
emh203 | 0:3d9c67d97d6f | 174 | status = ARM_MATH_SUCCESS; |
emh203 | 0:3d9c67d97d6f | 175 | } |
emh203 | 0:3d9c67d97d6f | 176 | |
emh203 | 0:3d9c67d97d6f | 177 | /* Return to application */ |
emh203 | 0:3d9c67d97d6f | 178 | return (status); |
emh203 | 0:3d9c67d97d6f | 179 | } |
emh203 | 0:3d9c67d97d6f | 180 | |
emh203 | 0:3d9c67d97d6f | 181 | /** |
emh203 | 0:3d9c67d97d6f | 182 | * @} end of MatrixScale group |
emh203 | 0:3d9c67d97d6f | 183 | */ |