Eli Hughes / CMSIS_DSP_401

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_f32.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?

UserRevisionLine numberNew contents of line
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_f32.c
emh203 0:3d9c67d97d6f 9 *
emh203 0:3d9c67d97d6f 10 * Description: Multiplies a floating-point 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 * @defgroup MatrixScale Matrix Scale
emh203 0:3d9c67d97d6f 49 *
emh203 0:3d9c67d97d6f 50 * Multiplies a matrix by a scalar. This is accomplished by multiplying each element in the
emh203 0:3d9c67d97d6f 51 * matrix by the scalar. For example:
emh203 0:3d9c67d97d6f 52 * \image html MatrixScale.gif "Matrix Scaling of a 3 x 3 matrix"
emh203 0:3d9c67d97d6f 53 *
emh203 0:3d9c67d97d6f 54 * The function checks to make sure that the input and output matrices are of the same size.
emh203 0:3d9c67d97d6f 55 *
emh203 0:3d9c67d97d6f 56 * In the fixed-point Q15 and Q31 functions, <code>scale</code> is represented by
emh203 0:3d9c67d97d6f 57 * a fractional multiplication <code>scaleFract</code> and an arithmetic shift <code>shift</code>.
emh203 0:3d9c67d97d6f 58 * The shift allows the gain of the scaling operation to exceed 1.0.
emh203 0:3d9c67d97d6f 59 * The overall scale factor applied to the fixed-point data is
emh203 0:3d9c67d97d6f 60 * <pre>
emh203 0:3d9c67d97d6f 61 * scale = scaleFract * 2^shift.
emh203 0:3d9c67d97d6f 62 * </pre>
emh203 0:3d9c67d97d6f 63 */
emh203 0:3d9c67d97d6f 64
emh203 0:3d9c67d97d6f 65 /**
emh203 0:3d9c67d97d6f 66 * @addtogroup MatrixScale
emh203 0:3d9c67d97d6f 67 * @{
emh203 0:3d9c67d97d6f 68 */
emh203 0:3d9c67d97d6f 69
emh203 0:3d9c67d97d6f 70 /**
emh203 0:3d9c67d97d6f 71 * @brief Floating-point matrix scaling.
emh203 0:3d9c67d97d6f 72 * @param[in] *pSrc points to input matrix structure
emh203 0:3d9c67d97d6f 73 * @param[in] scale scale factor to be applied
emh203 0:3d9c67d97d6f 74 * @param[out] *pDst points to output matrix structure
emh203 0:3d9c67d97d6f 75 * @return The function returns either <code>ARM_MATH_SIZE_MISMATCH</code>
emh203 0:3d9c67d97d6f 76 * or <code>ARM_MATH_SUCCESS</code> based on the outcome of size checking.
emh203 0:3d9c67d97d6f 77 *
emh203 0:3d9c67d97d6f 78 */
emh203 0:3d9c67d97d6f 79
emh203 0:3d9c67d97d6f 80 arm_status arm_mat_scale_f32(
emh203 0:3d9c67d97d6f 81 const arm_matrix_instance_f32 * pSrc,
emh203 0:3d9c67d97d6f 82 float32_t scale,
emh203 0:3d9c67d97d6f 83 arm_matrix_instance_f32 * pDst)
emh203 0:3d9c67d97d6f 84 {
emh203 0:3d9c67d97d6f 85 float32_t *pIn = pSrc->pData; /* input data matrix pointer */
emh203 0:3d9c67d97d6f 86 float32_t *pOut = pDst->pData; /* output data matrix pointer */
emh203 0:3d9c67d97d6f 87 uint32_t numSamples; /* total number of elements in the matrix */
emh203 0:3d9c67d97d6f 88 uint32_t blkCnt; /* loop counters */
emh203 0:3d9c67d97d6f 89 arm_status status; /* status of matrix scaling */
emh203 0:3d9c67d97d6f 90
emh203 0:3d9c67d97d6f 91 #ifndef ARM_MATH_CM0_FAMILY
emh203 0:3d9c67d97d6f 92
emh203 0:3d9c67d97d6f 93 float32_t in1, in2, in3, in4; /* temporary variables */
emh203 0:3d9c67d97d6f 94 float32_t out1, out2, out3, out4; /* temporary variables */
emh203 0:3d9c67d97d6f 95
emh203 0:3d9c67d97d6f 96 #endif // #ifndef ARM_MATH_CM0_FAMILY
emh203 0:3d9c67d97d6f 97
emh203 0:3d9c67d97d6f 98 #ifdef ARM_MATH_MATRIX_CHECK
emh203 0:3d9c67d97d6f 99 /* Check for matrix mismatch condition */
emh203 0:3d9c67d97d6f 100 if((pSrc->numRows != pDst->numRows) || (pSrc->numCols != pDst->numCols))
emh203 0:3d9c67d97d6f 101 {
emh203 0:3d9c67d97d6f 102 /* Set status as ARM_MATH_SIZE_MISMATCH */
emh203 0:3d9c67d97d6f 103 status = ARM_MATH_SIZE_MISMATCH;
emh203 0:3d9c67d97d6f 104 }
emh203 0:3d9c67d97d6f 105 else
emh203 0:3d9c67d97d6f 106 #endif /* #ifdef ARM_MATH_MATRIX_CHECK */
emh203 0:3d9c67d97d6f 107 {
emh203 0:3d9c67d97d6f 108 /* Total number of samples in the input matrix */
emh203 0:3d9c67d97d6f 109 numSamples = (uint32_t) pSrc->numRows * pSrc->numCols;
emh203 0:3d9c67d97d6f 110
emh203 0:3d9c67d97d6f 111 #ifndef ARM_MATH_CM0_FAMILY
emh203 0:3d9c67d97d6f 112
emh203 0:3d9c67d97d6f 113 /* Run the below code for Cortex-M4 and Cortex-M3 */
emh203 0:3d9c67d97d6f 114
emh203 0:3d9c67d97d6f 115 /* Loop Unrolling */
emh203 0:3d9c67d97d6f 116 blkCnt = numSamples >> 2;
emh203 0:3d9c67d97d6f 117
emh203 0:3d9c67d97d6f 118 /* First part of the processing with loop unrolling. Compute 4 outputs at a time.
emh203 0:3d9c67d97d6f 119 ** a second loop below computes the remaining 1 to 3 samples. */
emh203 0:3d9c67d97d6f 120 while(blkCnt > 0u)
emh203 0:3d9c67d97d6f 121 {
emh203 0:3d9c67d97d6f 122 /* C(m,n) = A(m,n) * scale */
emh203 0:3d9c67d97d6f 123 /* Scaling and results are stored in the destination buffer. */
emh203 0:3d9c67d97d6f 124 in1 = pIn[0];
emh203 0:3d9c67d97d6f 125 in2 = pIn[1];
emh203 0:3d9c67d97d6f 126 in3 = pIn[2];
emh203 0:3d9c67d97d6f 127 in4 = pIn[3];
emh203 0:3d9c67d97d6f 128
emh203 0:3d9c67d97d6f 129 out1 = in1 * scale;
emh203 0:3d9c67d97d6f 130 out2 = in2 * scale;
emh203 0:3d9c67d97d6f 131 out3 = in3 * scale;
emh203 0:3d9c67d97d6f 132 out4 = in4 * scale;
emh203 0:3d9c67d97d6f 133
emh203 0:3d9c67d97d6f 134
emh203 0:3d9c67d97d6f 135 pOut[0] = out1;
emh203 0:3d9c67d97d6f 136 pOut[1] = out2;
emh203 0:3d9c67d97d6f 137 pOut[2] = out3;
emh203 0:3d9c67d97d6f 138 pOut[3] = out4;
emh203 0:3d9c67d97d6f 139
emh203 0:3d9c67d97d6f 140 /* update pointers to process next sampels */
emh203 0:3d9c67d97d6f 141 pIn += 4u;
emh203 0:3d9c67d97d6f 142 pOut += 4u;
emh203 0:3d9c67d97d6f 143
emh203 0:3d9c67d97d6f 144 /* Decrement the numSamples loop counter */
emh203 0:3d9c67d97d6f 145 blkCnt--;
emh203 0:3d9c67d97d6f 146 }
emh203 0:3d9c67d97d6f 147
emh203 0:3d9c67d97d6f 148 /* If the numSamples is not a multiple of 4, compute any remaining output samples here.
emh203 0:3d9c67d97d6f 149 ** No loop unrolling is used. */
emh203 0:3d9c67d97d6f 150 blkCnt = numSamples % 0x4u;
emh203 0:3d9c67d97d6f 151
emh203 0:3d9c67d97d6f 152 #else
emh203 0:3d9c67d97d6f 153
emh203 0:3d9c67d97d6f 154 /* Run the below code for Cortex-M0 */
emh203 0:3d9c67d97d6f 155
emh203 0:3d9c67d97d6f 156 /* Initialize blkCnt with number of samples */
emh203 0:3d9c67d97d6f 157 blkCnt = numSamples;
emh203 0:3d9c67d97d6f 158
emh203 0:3d9c67d97d6f 159 #endif /* #ifndef ARM_MATH_CM0_FAMILY */
emh203 0:3d9c67d97d6f 160
emh203 0:3d9c67d97d6f 161 while(blkCnt > 0u)
emh203 0:3d9c67d97d6f 162 {
emh203 0:3d9c67d97d6f 163 /* C(m,n) = A(m,n) * scale */
emh203 0:3d9c67d97d6f 164 /* The results are stored in the destination buffer. */
emh203 0:3d9c67d97d6f 165 *pOut++ = (*pIn++) * scale;
emh203 0:3d9c67d97d6f 166
emh203 0:3d9c67d97d6f 167 /* Decrement the loop counter */
emh203 0:3d9c67d97d6f 168 blkCnt--;
emh203 0:3d9c67d97d6f 169 }
emh203 0:3d9c67d97d6f 170
emh203 0:3d9c67d97d6f 171 /* Set status as ARM_MATH_SUCCESS */
emh203 0:3d9c67d97d6f 172 status = ARM_MATH_SUCCESS;
emh203 0:3d9c67d97d6f 173 }
emh203 0:3d9c67d97d6f 174
emh203 0:3d9c67d97d6f 175 /* Return to application */
emh203 0:3d9c67d97d6f 176 return (status);
emh203 0:3d9c67d97d6f 177 }
emh203 0:3d9c67d97d6f 178
emh203 0:3d9c67d97d6f 179 /**
emh203 0:3d9c67d97d6f 180 * @} end of MatrixScale group
emh203 0:3d9c67d97d6f 181 */