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_sub_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_sub_f32.c
emh203 0:3d9c67d97d6f 9 *
emh203 0:3d9c67d97d6f 10 * Description: Floating-point matrix subtraction.
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 MatrixSub Matrix Subtraction
emh203 0:3d9c67d97d6f 49 *
emh203 0:3d9c67d97d6f 50 * Subtract two matrices.
emh203 0:3d9c67d97d6f 51 * \image html MatrixSubtraction.gif "Subraction of two 3 x 3 matrices"
emh203 0:3d9c67d97d6f 52 *
emh203 0:3d9c67d97d6f 53 * The functions check to make sure that
emh203 0:3d9c67d97d6f 54 * <code>pSrcA</code>, <code>pSrcB</code>, and <code>pDst</code> have the same
emh203 0:3d9c67d97d6f 55 * number of rows and columns.
emh203 0:3d9c67d97d6f 56 */
emh203 0:3d9c67d97d6f 57
emh203 0:3d9c67d97d6f 58 /**
emh203 0:3d9c67d97d6f 59 * @addtogroup MatrixSub
emh203 0:3d9c67d97d6f 60 * @{
emh203 0:3d9c67d97d6f 61 */
emh203 0:3d9c67d97d6f 62
emh203 0:3d9c67d97d6f 63 /**
emh203 0:3d9c67d97d6f 64 * @brief Floating-point matrix subtraction
emh203 0:3d9c67d97d6f 65 * @param[in] *pSrcA points to the first input matrix structure
emh203 0:3d9c67d97d6f 66 * @param[in] *pSrcB points to the second input matrix structure
emh203 0:3d9c67d97d6f 67 * @param[out] *pDst points to output matrix structure
emh203 0:3d9c67d97d6f 68 * @return The function returns either
emh203 0:3d9c67d97d6f 69 * <code>ARM_MATH_SIZE_MISMATCH</code> or <code>ARM_MATH_SUCCESS</code> based on the outcome of size checking.
emh203 0:3d9c67d97d6f 70 */
emh203 0:3d9c67d97d6f 71
emh203 0:3d9c67d97d6f 72 arm_status arm_mat_sub_f32(
emh203 0:3d9c67d97d6f 73 const arm_matrix_instance_f32 * pSrcA,
emh203 0:3d9c67d97d6f 74 const arm_matrix_instance_f32 * pSrcB,
emh203 0:3d9c67d97d6f 75 arm_matrix_instance_f32 * pDst)
emh203 0:3d9c67d97d6f 76 {
emh203 0:3d9c67d97d6f 77 float32_t *pIn1 = pSrcA->pData; /* input data matrix pointer A */
emh203 0:3d9c67d97d6f 78 float32_t *pIn2 = pSrcB->pData; /* input data matrix pointer B */
emh203 0:3d9c67d97d6f 79 float32_t *pOut = pDst->pData; /* output data matrix pointer */
emh203 0:3d9c67d97d6f 80
emh203 0:3d9c67d97d6f 81 #ifndef ARM_MATH_CM0_FAMILY
emh203 0:3d9c67d97d6f 82
emh203 0:3d9c67d97d6f 83 float32_t inA1, inA2, inB1, inB2, out1, out2; /* temporary variables */
emh203 0:3d9c67d97d6f 84
emh203 0:3d9c67d97d6f 85 #endif // #ifndef ARM_MATH_CM0_FAMILY
emh203 0:3d9c67d97d6f 86
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 subtraction */
emh203 0:3d9c67d97d6f 90
emh203 0:3d9c67d97d6f 91 #ifdef ARM_MATH_MATRIX_CHECK
emh203 0:3d9c67d97d6f 92 /* Check for matrix mismatch condition */
emh203 0:3d9c67d97d6f 93 if((pSrcA->numRows != pSrcB->numRows) ||
emh203 0:3d9c67d97d6f 94 (pSrcA->numCols != pSrcB->numCols) ||
emh203 0:3d9c67d97d6f 95 (pSrcA->numRows != pDst->numRows) || (pSrcA->numCols != pDst->numCols))
emh203 0:3d9c67d97d6f 96 {
emh203 0:3d9c67d97d6f 97 /* Set status as ARM_MATH_SIZE_MISMATCH */
emh203 0:3d9c67d97d6f 98 status = ARM_MATH_SIZE_MISMATCH;
emh203 0:3d9c67d97d6f 99 }
emh203 0:3d9c67d97d6f 100 else
emh203 0:3d9c67d97d6f 101 #endif /* #ifdef ARM_MATH_MATRIX_CHECK */
emh203 0:3d9c67d97d6f 102 {
emh203 0:3d9c67d97d6f 103 /* Total number of samples in the input matrix */
emh203 0:3d9c67d97d6f 104 numSamples = (uint32_t) pSrcA->numRows * pSrcA->numCols;
emh203 0:3d9c67d97d6f 105
emh203 0:3d9c67d97d6f 106 #ifndef ARM_MATH_CM0_FAMILY
emh203 0:3d9c67d97d6f 107
emh203 0:3d9c67d97d6f 108 /* Run the below code for Cortex-M4 and Cortex-M3 */
emh203 0:3d9c67d97d6f 109
emh203 0:3d9c67d97d6f 110 /* Loop Unrolling */
emh203 0:3d9c67d97d6f 111 blkCnt = numSamples >> 2u;
emh203 0:3d9c67d97d6f 112
emh203 0:3d9c67d97d6f 113 /* First part of the processing with loop unrolling. Compute 4 outputs at a time.
emh203 0:3d9c67d97d6f 114 ** a second loop below computes the remaining 1 to 3 samples. */
emh203 0:3d9c67d97d6f 115 while(blkCnt > 0u)
emh203 0:3d9c67d97d6f 116 {
emh203 0:3d9c67d97d6f 117 /* C(m,n) = A(m,n) - B(m,n) */
emh203 0:3d9c67d97d6f 118 /* Subtract and then store the results in the destination buffer. */
emh203 0:3d9c67d97d6f 119 /* Read values from source A */
emh203 0:3d9c67d97d6f 120 inA1 = pIn1[0];
emh203 0:3d9c67d97d6f 121
emh203 0:3d9c67d97d6f 122 /* Read values from source B */
emh203 0:3d9c67d97d6f 123 inB1 = pIn2[0];
emh203 0:3d9c67d97d6f 124
emh203 0:3d9c67d97d6f 125 /* Read values from source A */
emh203 0:3d9c67d97d6f 126 inA2 = pIn1[1];
emh203 0:3d9c67d97d6f 127
emh203 0:3d9c67d97d6f 128 /* out = sourceA - sourceB */
emh203 0:3d9c67d97d6f 129 out1 = inA1 - inB1;
emh203 0:3d9c67d97d6f 130
emh203 0:3d9c67d97d6f 131 /* Read values from source B */
emh203 0:3d9c67d97d6f 132 inB2 = pIn2[1];
emh203 0:3d9c67d97d6f 133
emh203 0:3d9c67d97d6f 134 /* Read values from source A */
emh203 0:3d9c67d97d6f 135 inA1 = pIn1[2];
emh203 0:3d9c67d97d6f 136
emh203 0:3d9c67d97d6f 137 /* out = sourceA - sourceB */
emh203 0:3d9c67d97d6f 138 out2 = inA2 - inB2;
emh203 0:3d9c67d97d6f 139
emh203 0:3d9c67d97d6f 140 /* Read values from source B */
emh203 0:3d9c67d97d6f 141 inB1 = pIn2[2];
emh203 0:3d9c67d97d6f 142
emh203 0:3d9c67d97d6f 143 /* Store result in destination */
emh203 0:3d9c67d97d6f 144 pOut[0] = out1;
emh203 0:3d9c67d97d6f 145 pOut[1] = out2;
emh203 0:3d9c67d97d6f 146
emh203 0:3d9c67d97d6f 147 /* Read values from source A */
emh203 0:3d9c67d97d6f 148 inA2 = pIn1[3];
emh203 0:3d9c67d97d6f 149
emh203 0:3d9c67d97d6f 150 /* Read values from source B */
emh203 0:3d9c67d97d6f 151 inB2 = pIn2[3];
emh203 0:3d9c67d97d6f 152
emh203 0:3d9c67d97d6f 153 /* out = sourceA - sourceB */
emh203 0:3d9c67d97d6f 154 out1 = inA1 - inB1;
emh203 0:3d9c67d97d6f 155
emh203 0:3d9c67d97d6f 156
emh203 0:3d9c67d97d6f 157 /* out = sourceA - sourceB */
emh203 0:3d9c67d97d6f 158 out2 = inA2 - inB2;
emh203 0:3d9c67d97d6f 159
emh203 0:3d9c67d97d6f 160 /* Store result in destination */
emh203 0:3d9c67d97d6f 161 pOut[2] = out1;
emh203 0:3d9c67d97d6f 162
emh203 0:3d9c67d97d6f 163 /* Store result in destination */
emh203 0:3d9c67d97d6f 164 pOut[3] = out2;
emh203 0:3d9c67d97d6f 165
emh203 0:3d9c67d97d6f 166
emh203 0:3d9c67d97d6f 167 /* update pointers to process next sampels */
emh203 0:3d9c67d97d6f 168 pIn1 += 4u;
emh203 0:3d9c67d97d6f 169 pIn2 += 4u;
emh203 0:3d9c67d97d6f 170 pOut += 4u;
emh203 0:3d9c67d97d6f 171
emh203 0:3d9c67d97d6f 172 /* Decrement the loop counter */
emh203 0:3d9c67d97d6f 173 blkCnt--;
emh203 0:3d9c67d97d6f 174 }
emh203 0:3d9c67d97d6f 175
emh203 0:3d9c67d97d6f 176 /* If the numSamples is not a multiple of 4, compute any remaining output samples here.
emh203 0:3d9c67d97d6f 177 ** No loop unrolling is used. */
emh203 0:3d9c67d97d6f 178 blkCnt = numSamples % 0x4u;
emh203 0:3d9c67d97d6f 179
emh203 0:3d9c67d97d6f 180 #else
emh203 0:3d9c67d97d6f 181
emh203 0:3d9c67d97d6f 182 /* Run the below code for Cortex-M0 */
emh203 0:3d9c67d97d6f 183
emh203 0:3d9c67d97d6f 184 /* Initialize blkCnt with number of samples */
emh203 0:3d9c67d97d6f 185 blkCnt = numSamples;
emh203 0:3d9c67d97d6f 186
emh203 0:3d9c67d97d6f 187 #endif /* #ifndef ARM_MATH_CM0_FAMILY */
emh203 0:3d9c67d97d6f 188
emh203 0:3d9c67d97d6f 189 while(blkCnt > 0u)
emh203 0:3d9c67d97d6f 190 {
emh203 0:3d9c67d97d6f 191 /* C(m,n) = A(m,n) - B(m,n) */
emh203 0:3d9c67d97d6f 192 /* Subtract and then store the results in the destination buffer. */
emh203 0:3d9c67d97d6f 193 *pOut++ = (*pIn1++) - (*pIn2++);
emh203 0:3d9c67d97d6f 194
emh203 0:3d9c67d97d6f 195 /* Decrement the loop counter */
emh203 0:3d9c67d97d6f 196 blkCnt--;
emh203 0:3d9c67d97d6f 197 }
emh203 0:3d9c67d97d6f 198
emh203 0:3d9c67d97d6f 199 /* Set status as ARM_MATH_SUCCESS */
emh203 0:3d9c67d97d6f 200 status = ARM_MATH_SUCCESS;
emh203 0:3d9c67d97d6f 201 }
emh203 0:3d9c67d97d6f 202
emh203 0:3d9c67d97d6f 203 /* Return to application */
emh203 0:3d9c67d97d6f 204 return (status);
emh203 0:3d9c67d97d6f 205 }
emh203 0:3d9c67d97d6f 206
emh203 0:3d9c67d97d6f 207 /**
emh203 0:3d9c67d97d6f 208 * @} end of MatrixSub group
emh203 0:3d9c67d97d6f 209 */