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

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_cmplx_mult_real_q31.c
emh203 0:3d9c67d97d6f 9 *
emh203 0:3d9c67d97d6f 10 * Description: Q31 complex by real multiplication
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 groupCmplxMath
emh203 0:3d9c67d97d6f 45 */
emh203 0:3d9c67d97d6f 46
emh203 0:3d9c67d97d6f 47 /**
emh203 0:3d9c67d97d6f 48 * @addtogroup CmplxByRealMult
emh203 0:3d9c67d97d6f 49 * @{
emh203 0:3d9c67d97d6f 50 */
emh203 0:3d9c67d97d6f 51
emh203 0:3d9c67d97d6f 52
emh203 0:3d9c67d97d6f 53 /**
emh203 0:3d9c67d97d6f 54 * @brief Q31 complex-by-real multiplication
emh203 0:3d9c67d97d6f 55 * @param[in] *pSrcCmplx points to the complex input vector
emh203 0:3d9c67d97d6f 56 * @param[in] *pSrcReal points to the real input vector
emh203 0:3d9c67d97d6f 57 * @param[out] *pCmplxDst points to the complex output vector
emh203 0:3d9c67d97d6f 58 * @param[in] numSamples number of samples in each vector
emh203 0:3d9c67d97d6f 59 * @return none.
emh203 0:3d9c67d97d6f 60 *
emh203 0:3d9c67d97d6f 61 * <b>Scaling and Overflow Behavior:</b>
emh203 0:3d9c67d97d6f 62 * \par
emh203 0:3d9c67d97d6f 63 * The function uses saturating arithmetic.
emh203 0:3d9c67d97d6f 64 * Results outside of the allowable Q31 range[0x80000000 0x7FFFFFFF] will be saturated.
emh203 0:3d9c67d97d6f 65 */
emh203 0:3d9c67d97d6f 66
emh203 0:3d9c67d97d6f 67 void arm_cmplx_mult_real_q31(
emh203 0:3d9c67d97d6f 68 q31_t * pSrcCmplx,
emh203 0:3d9c67d97d6f 69 q31_t * pSrcReal,
emh203 0:3d9c67d97d6f 70 q31_t * pCmplxDst,
emh203 0:3d9c67d97d6f 71 uint32_t numSamples)
emh203 0:3d9c67d97d6f 72 {
emh203 0:3d9c67d97d6f 73 q31_t inA1; /* Temporary variable to store input value */
emh203 0:3d9c67d97d6f 74
emh203 0:3d9c67d97d6f 75 #ifndef ARM_MATH_CM0_FAMILY
emh203 0:3d9c67d97d6f 76
emh203 0:3d9c67d97d6f 77 /* Run the below code for Cortex-M4 and Cortex-M3 */
emh203 0:3d9c67d97d6f 78 uint32_t blkCnt; /* loop counters */
emh203 0:3d9c67d97d6f 79 q31_t inA2, inA3, inA4; /* Temporary variables to hold input data */
emh203 0:3d9c67d97d6f 80 q31_t inB1, inB2; /* Temporary variabels to hold input data */
emh203 0:3d9c67d97d6f 81 q31_t out1, out2, out3, out4; /* Temporary variables to hold output data */
emh203 0:3d9c67d97d6f 82
emh203 0:3d9c67d97d6f 83 /* loop Unrolling */
emh203 0:3d9c67d97d6f 84 blkCnt = numSamples >> 2u;
emh203 0:3d9c67d97d6f 85
emh203 0:3d9c67d97d6f 86 /* First part of the processing with loop unrolling. Compute 4 outputs at a time.
emh203 0:3d9c67d97d6f 87 ** a second loop below computes the remaining 1 to 3 samples. */
emh203 0:3d9c67d97d6f 88 while(blkCnt > 0u)
emh203 0:3d9c67d97d6f 89 {
emh203 0:3d9c67d97d6f 90 /* C[2 * i] = A[2 * i] * B[i]. */
emh203 0:3d9c67d97d6f 91 /* C[2 * i + 1] = A[2 * i + 1] * B[i]. */
emh203 0:3d9c67d97d6f 92 /* read real input from complex input buffer */
emh203 0:3d9c67d97d6f 93 inA1 = *pSrcCmplx++;
emh203 0:3d9c67d97d6f 94 inA2 = *pSrcCmplx++;
emh203 0:3d9c67d97d6f 95 /* read input from real input bufer */
emh203 0:3d9c67d97d6f 96 inB1 = *pSrcReal++;
emh203 0:3d9c67d97d6f 97 inB2 = *pSrcReal++;
emh203 0:3d9c67d97d6f 98 /* read imaginary input from complex input buffer */
emh203 0:3d9c67d97d6f 99 inA3 = *pSrcCmplx++;
emh203 0:3d9c67d97d6f 100 inA4 = *pSrcCmplx++;
emh203 0:3d9c67d97d6f 101
emh203 0:3d9c67d97d6f 102 /* multiply complex input with real input */
emh203 0:3d9c67d97d6f 103 out1 = ((q63_t) inA1 * inB1) >> 32;
emh203 0:3d9c67d97d6f 104 out2 = ((q63_t) inA2 * inB1) >> 32;
emh203 0:3d9c67d97d6f 105 out3 = ((q63_t) inA3 * inB2) >> 32;
emh203 0:3d9c67d97d6f 106 out4 = ((q63_t) inA4 * inB2) >> 32;
emh203 0:3d9c67d97d6f 107
emh203 0:3d9c67d97d6f 108 /* sature the result */
emh203 0:3d9c67d97d6f 109 out1 = __SSAT(out1, 31);
emh203 0:3d9c67d97d6f 110 out2 = __SSAT(out2, 31);
emh203 0:3d9c67d97d6f 111 out3 = __SSAT(out3, 31);
emh203 0:3d9c67d97d6f 112 out4 = __SSAT(out4, 31);
emh203 0:3d9c67d97d6f 113
emh203 0:3d9c67d97d6f 114 /* get result in 1.31 format */
emh203 0:3d9c67d97d6f 115 out1 = out1 << 1;
emh203 0:3d9c67d97d6f 116 out2 = out2 << 1;
emh203 0:3d9c67d97d6f 117 out3 = out3 << 1;
emh203 0:3d9c67d97d6f 118 out4 = out4 << 1;
emh203 0:3d9c67d97d6f 119
emh203 0:3d9c67d97d6f 120 /* store the result to destination buffer */
emh203 0:3d9c67d97d6f 121 *pCmplxDst++ = out1;
emh203 0:3d9c67d97d6f 122 *pCmplxDst++ = out2;
emh203 0:3d9c67d97d6f 123 *pCmplxDst++ = out3;
emh203 0:3d9c67d97d6f 124 *pCmplxDst++ = out4;
emh203 0:3d9c67d97d6f 125
emh203 0:3d9c67d97d6f 126 /* read real input from complex input buffer */
emh203 0:3d9c67d97d6f 127 inA1 = *pSrcCmplx++;
emh203 0:3d9c67d97d6f 128 inA2 = *pSrcCmplx++;
emh203 0:3d9c67d97d6f 129 /* read input from real input bufer */
emh203 0:3d9c67d97d6f 130 inB1 = *pSrcReal++;
emh203 0:3d9c67d97d6f 131 inB2 = *pSrcReal++;
emh203 0:3d9c67d97d6f 132 /* read imaginary input from complex input buffer */
emh203 0:3d9c67d97d6f 133 inA3 = *pSrcCmplx++;
emh203 0:3d9c67d97d6f 134 inA4 = *pSrcCmplx++;
emh203 0:3d9c67d97d6f 135
emh203 0:3d9c67d97d6f 136 /* multiply complex input with real input */
emh203 0:3d9c67d97d6f 137 out1 = ((q63_t) inA1 * inB1) >> 32;
emh203 0:3d9c67d97d6f 138 out2 = ((q63_t) inA2 * inB1) >> 32;
emh203 0:3d9c67d97d6f 139 out3 = ((q63_t) inA3 * inB2) >> 32;
emh203 0:3d9c67d97d6f 140 out4 = ((q63_t) inA4 * inB2) >> 32;
emh203 0:3d9c67d97d6f 141
emh203 0:3d9c67d97d6f 142 /* sature the result */
emh203 0:3d9c67d97d6f 143 out1 = __SSAT(out1, 31);
emh203 0:3d9c67d97d6f 144 out2 = __SSAT(out2, 31);
emh203 0:3d9c67d97d6f 145 out3 = __SSAT(out3, 31);
emh203 0:3d9c67d97d6f 146 out4 = __SSAT(out4, 31);
emh203 0:3d9c67d97d6f 147
emh203 0:3d9c67d97d6f 148 /* get result in 1.31 format */
emh203 0:3d9c67d97d6f 149 out1 = out1 << 1;
emh203 0:3d9c67d97d6f 150 out2 = out2 << 1;
emh203 0:3d9c67d97d6f 151 out3 = out3 << 1;
emh203 0:3d9c67d97d6f 152 out4 = out4 << 1;
emh203 0:3d9c67d97d6f 153
emh203 0:3d9c67d97d6f 154 /* store the result to destination buffer */
emh203 0:3d9c67d97d6f 155 *pCmplxDst++ = out1;
emh203 0:3d9c67d97d6f 156 *pCmplxDst++ = out2;
emh203 0:3d9c67d97d6f 157 *pCmplxDst++ = out3;
emh203 0:3d9c67d97d6f 158 *pCmplxDst++ = out4;
emh203 0:3d9c67d97d6f 159
emh203 0:3d9c67d97d6f 160 /* Decrement the numSamples loop counter */
emh203 0:3d9c67d97d6f 161 blkCnt--;
emh203 0:3d9c67d97d6f 162 }
emh203 0:3d9c67d97d6f 163
emh203 0:3d9c67d97d6f 164 /* If the numSamples is not a multiple of 4, compute any remaining output samples here.
emh203 0:3d9c67d97d6f 165 ** No loop unrolling is used. */
emh203 0:3d9c67d97d6f 166 blkCnt = numSamples % 0x4u;
emh203 0:3d9c67d97d6f 167
emh203 0:3d9c67d97d6f 168 while(blkCnt > 0u)
emh203 0:3d9c67d97d6f 169 {
emh203 0:3d9c67d97d6f 170 /* C[2 * i] = A[2 * i] * B[i]. */
emh203 0:3d9c67d97d6f 171 /* C[2 * i + 1] = A[2 * i + 1] * B[i]. */
emh203 0:3d9c67d97d6f 172 /* read real input from complex input buffer */
emh203 0:3d9c67d97d6f 173 inA1 = *pSrcCmplx++;
emh203 0:3d9c67d97d6f 174 inA2 = *pSrcCmplx++;
emh203 0:3d9c67d97d6f 175 /* read input from real input bufer */
emh203 0:3d9c67d97d6f 176 inB1 = *pSrcReal++;
emh203 0:3d9c67d97d6f 177
emh203 0:3d9c67d97d6f 178 /* multiply complex input with real input */
emh203 0:3d9c67d97d6f 179 out1 = ((q63_t) inA1 * inB1) >> 32;
emh203 0:3d9c67d97d6f 180 out2 = ((q63_t) inA2 * inB1) >> 32;
emh203 0:3d9c67d97d6f 181
emh203 0:3d9c67d97d6f 182 /* sature the result */
emh203 0:3d9c67d97d6f 183 out1 = __SSAT(out1, 31);
emh203 0:3d9c67d97d6f 184 out2 = __SSAT(out2, 31);
emh203 0:3d9c67d97d6f 185
emh203 0:3d9c67d97d6f 186 /* get result in 1.31 format */
emh203 0:3d9c67d97d6f 187 out1 = out1 << 1;
emh203 0:3d9c67d97d6f 188 out2 = out2 << 1;
emh203 0:3d9c67d97d6f 189
emh203 0:3d9c67d97d6f 190 /* store the result to destination buffer */
emh203 0:3d9c67d97d6f 191 *pCmplxDst++ = out1;
emh203 0:3d9c67d97d6f 192 *pCmplxDst++ = out2;
emh203 0:3d9c67d97d6f 193
emh203 0:3d9c67d97d6f 194 /* Decrement the numSamples loop counter */
emh203 0:3d9c67d97d6f 195 blkCnt--;
emh203 0:3d9c67d97d6f 196 }
emh203 0:3d9c67d97d6f 197
emh203 0:3d9c67d97d6f 198 #else
emh203 0:3d9c67d97d6f 199
emh203 0:3d9c67d97d6f 200 /* Run the below code for Cortex-M0 */
emh203 0:3d9c67d97d6f 201
emh203 0:3d9c67d97d6f 202 while(numSamples > 0u)
emh203 0:3d9c67d97d6f 203 {
emh203 0:3d9c67d97d6f 204 /* realOut = realA * realB. */
emh203 0:3d9c67d97d6f 205 /* imagReal = imagA * realB. */
emh203 0:3d9c67d97d6f 206 inA1 = *pSrcReal++;
emh203 0:3d9c67d97d6f 207 /* store the result in the destination buffer. */
emh203 0:3d9c67d97d6f 208 *pCmplxDst++ =
emh203 0:3d9c67d97d6f 209 (q31_t) clip_q63_to_q31(((q63_t) * pSrcCmplx++ * inA1) >> 31);
emh203 0:3d9c67d97d6f 210 *pCmplxDst++ =
emh203 0:3d9c67d97d6f 211 (q31_t) clip_q63_to_q31(((q63_t) * pSrcCmplx++ * inA1) >> 31);
emh203 0:3d9c67d97d6f 212
emh203 0:3d9c67d97d6f 213 /* Decrement the numSamples loop counter */
emh203 0:3d9c67d97d6f 214 numSamples--;
emh203 0:3d9c67d97d6f 215 }
emh203 0:3d9c67d97d6f 216
emh203 0:3d9c67d97d6f 217 #endif /* #ifndef ARM_MATH_CM0_FAMILY */
emh203 0:3d9c67d97d6f 218
emh203 0:3d9c67d97d6f 219 }
emh203 0:3d9c67d97d6f 220
emh203 0:3d9c67d97d6f 221 /**
emh203 0:3d9c67d97d6f 222 * @} end of CmplxByRealMult group
emh203 0:3d9c67d97d6f 223 */