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Diffstat (limited to 'Middlewares/Third_Party/ARM/ARM.CMSIS-DSP.1.17.1/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q15.c')
| -rwxr-xr-x | Middlewares/Third_Party/ARM/ARM.CMSIS-DSP.1.17.1/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q15.c | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/Middlewares/Third_Party/ARM/ARM.CMSIS-DSP.1.17.1/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q15.c b/Middlewares/Third_Party/ARM/ARM.CMSIS-DSP.1.17.1/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q15.c new file mode 100755 index 0000000..0d94ded --- /dev/null +++ b/Middlewares/Third_Party/ARM/ARM.CMSIS-DSP.1.17.1/Source/ComplexMathFunctions/arm_cmplx_dot_prod_q15.c @@ -0,0 +1,258 @@ +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_cmplx_dot_prod_q15.c + * Description: Processing function for the Q15 Complex Dot product + * + * $Date: 23 April 2021 + * $Revision: V1.9.0 + * + * Target Processor: Cortex-M and Cortex-A cores + * -------------------------------------------------------------------- */ + +/* + * Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved. + * + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the License); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an AS IS BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include "arm_compiler_specific.h" + + +#include "dsp/complex_math_functions.h" + +/** + @ingroup groupCmplxMath + */ + +/** + @addtogroup cmplx_dot_prod + @{ + */ + +/** + @brief Q15 complex dot product. + @param[in] pSrcA points to the first input vector + @param[in] pSrcB points to the second input vector + @param[in] numSamples number of samples in each vector + @param[out] realResult real part of the result returned here + @param[out] imagResult imaginary part of the result returned her + + @par Scaling and Overflow Behavior + The function is implemented using an internal 64-bit accumulator. + The intermediate 1.15 by 1.15 multiplications are performed with full precision and yield a 2.30 result. + These are accumulated in a 64-bit accumulator with 34.30 precision. + As a final step, the accumulators are converted to 8.24 format. + The return results <code>realResult</code> and <code>imagResult</code> are in 8.24 format. + */ + +#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE) +ARM_DSP_ATTRIBUTE void arm_cmplx_dot_prod_q15( + const q15_t * pSrcA, + const q15_t * pSrcB, + uint32_t numSamples, + q31_t * realResult, + q31_t * imagResult) +{ + int32_t blkCnt; + q63_t accReal = 0LL; + q63_t accImag = 0LL; + q15x8_t vecSrcA, vecSrcB; + q15x8_t vecSrcC, vecSrcD; + + blkCnt = (numSamples >> 3); + blkCnt -= 1; + if (blkCnt > 0) { + /* should give more freedom to generate stall free code */ + vecSrcA = vld1q(pSrcA); + vecSrcB = vld1q(pSrcB); + pSrcA += 8; + pSrcB += 8; + + while (blkCnt > 0) { + + accReal = vmlsldavaq(accReal, vecSrcA, vecSrcB); + vecSrcC = vld1q(pSrcA); + pSrcA += 8; + + accImag = vmlaldavaxq(accImag, vecSrcA, vecSrcB); + vecSrcD = vld1q(pSrcB); + pSrcB += 8; + + accReal = vmlsldavaq(accReal, vecSrcC, vecSrcD); + vecSrcA = vld1q(pSrcA); + pSrcA += 8; + + accImag = vmlaldavaxq(accImag, vecSrcC, vecSrcD); + vecSrcB = vld1q(pSrcB); + pSrcB += 8; + /* + * Decrement the blockSize loop counter + */ + blkCnt--; + } + + /* process last elements out of the loop avoid the armclang breaking the SW pipeline */ + accReal = vmlsldavaq(accReal, vecSrcA, vecSrcB); + vecSrcC = vld1q(pSrcA); + + accImag = vmlaldavaxq(accImag, vecSrcA, vecSrcB); + vecSrcD = vld1q(pSrcB); + + accReal = vmlsldavaq(accReal, vecSrcC, vecSrcD); + vecSrcA = vld1q(pSrcA); + + accImag = vmlaldavaxq(accImag, vecSrcC, vecSrcD); + vecSrcB = vld1q(pSrcB); + + /* + * tail + */ + blkCnt = CMPLX_DIM * (numSamples & 7); + do { + mve_pred16_t p = vctp16q(blkCnt); + + pSrcA += 8; + pSrcB += 8; + + vecSrcA = vldrhq_z_s16(pSrcA, p); + vecSrcB = vldrhq_z_s16(pSrcB, p); + + accReal = vmlsldavaq_p(accReal, vecSrcA, vecSrcB, p); + accImag = vmlaldavaxq_p(accImag, vecSrcA, vecSrcB, p); + + blkCnt -= 8; + } + while ((int32_t) blkCnt > 0); + } else { + blkCnt = numSamples * CMPLX_DIM; + while (blkCnt > 0) { + mve_pred16_t p = vctp16q(blkCnt); + + vecSrcA = vldrhq_z_s16(pSrcA, p); + vecSrcB = vldrhq_z_s16(pSrcB, p); + + accReal = vmlsldavaq_p(accReal, vecSrcA, vecSrcB, p); + accImag = vmlaldavaxq_p(accImag, vecSrcA, vecSrcB, p); + + /* + * Decrement the blkCnt loop counter + * Advance vector source and destination pointers + */ + pSrcA += 8; + pSrcB += 8; + blkCnt -= 8; + } + } + *realResult = asrl(accReal, (14 - 8)); + *imagResult = asrl(accImag, (14 - 8)); +} +#else +ARM_DSP_ATTRIBUTE void arm_cmplx_dot_prod_q15( + const q15_t * pSrcA, + const q15_t * pSrcB, + uint32_t numSamples, + q31_t * realResult, + q31_t * imagResult) +{ + uint32_t blkCnt; /* Loop counter */ + q63_t real_sum = 0, imag_sum = 0; /* Temporary result variables */ + q15_t a0,b0,c0,d0; + +#if defined (ARM_MATH_LOOPUNROLL) + /* Loop unrolling: Compute 4 outputs at a time */ + blkCnt = numSamples >> 2U; + + while (blkCnt > 0U) + { + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += (q31_t)a0 * c0; + imag_sum += (q31_t)a0 * d0; + real_sum -= (q31_t)b0 * d0; + imag_sum += (q31_t)b0 * c0; + + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += (q31_t)a0 * c0; + imag_sum += (q31_t)a0 * d0; + real_sum -= (q31_t)b0 * d0; + imag_sum += (q31_t)b0 * c0; + + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += (q31_t)a0 * c0; + imag_sum += (q31_t)a0 * d0; + real_sum -= (q31_t)b0 * d0; + imag_sum += (q31_t)b0 * c0; + + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += (q31_t)a0 * c0; + imag_sum += (q31_t)a0 * d0; + real_sum -= (q31_t)b0 * d0; + imag_sum += (q31_t)b0 * c0; + + /* Decrement loop counter */ + blkCnt--; + } + + /* Loop unrolling: Compute remaining outputs */ + blkCnt = numSamples % 0x4U; + +#else + + /* Initialize blkCnt with number of samples */ + blkCnt = numSamples; + +#endif /* #if defined (ARM_MATH_LOOPUNROLL) */ + + while (blkCnt > 0U) + { + a0 = *pSrcA++; + b0 = *pSrcA++; + c0 = *pSrcB++; + d0 = *pSrcB++; + + real_sum += (q31_t)a0 * c0; + imag_sum += (q31_t)a0 * d0; + real_sum -= (q31_t)b0 * d0; + imag_sum += (q31_t)b0 * c0; + + /* Decrement loop counter */ + blkCnt--; + } + + /* Store real and imaginary result in 8.24 format */ + /* Convert real data in 34.30 to 8.24 by 6 right shifts */ + *realResult = (q31_t) (real_sum >> 6); + /* Convert imaginary data in 34.30 to 8.24 by 6 right shifts */ + *imagResult = (q31_t) (imag_sum >> 6); +} +#endif /* defined(ARM_MATH_MVEI) */ + +/** + @} end of cmplx_dot_prod group + */ |