diff options
Diffstat (limited to 'hid-dials/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_rfft_q15.c')
| -rw-r--r-- | hid-dials/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_rfft_q15.c | 426 |
1 files changed, 0 insertions, 426 deletions
diff --git a/hid-dials/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_rfft_q15.c b/hid-dials/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_rfft_q15.c deleted file mode 100644 index 8a888f4..0000000 --- a/hid-dials/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_rfft_q15.c +++ /dev/null @@ -1,426 +0,0 @@ -/* ----------------------------------------------------------------------
- * Project: CMSIS DSP Library
- * Title: arm_rfft_q15.c
- * Description: RFFT & RIFFT Q15 process function
- *
- * $Date: 27. January 2017
- * $Revision: V.1.5.1
- *
- * Target Processor: Cortex-M cores
- * -------------------------------------------------------------------- */
-/*
- * Copyright (C) 2010-2017 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_math.h"
-
-/* ----------------------------------------------------------------------
- * Internal functions prototypes
- * -------------------------------------------------------------------- */
-
-void arm_split_rfft_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- q15_t * pATable,
- q15_t * pBTable,
- q15_t * pDst,
- uint32_t modifier);
-
-void arm_split_rifft_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- q15_t * pATable,
- q15_t * pBTable,
- q15_t * pDst,
- uint32_t modifier);
-
-/**
-* @addtogroup RealFFT
-* @{
-*/
-
-/**
-* @brief Processing function for the Q15 RFFT/RIFFT.
-* @param[in] *S points to an instance of the Q15 RFFT/RIFFT structure.
-* @param[in] *pSrc points to the input buffer.
-* @param[out] *pDst points to the output buffer.
-* @return none.
-*
-* \par Input an output formats:
-* \par
-* Internally input is downscaled by 2 for every stage to avoid saturations inside CFFT/CIFFT process.
-* Hence the output format is different for different RFFT sizes.
-* The input and output formats for different RFFT sizes and number of bits to upscale are mentioned in the tables below for RFFT and RIFFT:
-* \par
-* \image html RFFTQ15.gif "Input and Output Formats for Q15 RFFT"
-* \par
-* \image html RIFFTQ15.gif "Input and Output Formats for Q15 RIFFT"
-*/
-
-void arm_rfft_q15(
- const arm_rfft_instance_q15 * S,
- q15_t * pSrc,
- q15_t * pDst)
-{
- const arm_cfft_instance_q15 *S_CFFT = S->pCfft;
- uint32_t i;
- uint32_t L2 = S->fftLenReal >> 1;
-
- /* Calculation of RIFFT of input */
- if (S->ifftFlagR == 1U)
- {
- /* Real IFFT core process */
- arm_split_rifft_q15(pSrc, L2, S->pTwiddleAReal,
- S->pTwiddleBReal, pDst, S->twidCoefRModifier);
-
- /* Complex IFFT process */
- arm_cfft_q15(S_CFFT, pDst, S->ifftFlagR, S->bitReverseFlagR);
-
- for(i=0;i<S->fftLenReal;i++)
- {
- pDst[i] = pDst[i] << 1;
- }
- }
- else
- {
- /* Calculation of RFFT of input */
-
- /* Complex FFT process */
- arm_cfft_q15(S_CFFT, pSrc, S->ifftFlagR, S->bitReverseFlagR);
-
- /* Real FFT core process */
- arm_split_rfft_q15(pSrc, L2, S->pTwiddleAReal,
- S->pTwiddleBReal, pDst, S->twidCoefRModifier);
- }
-}
-
-/**
-* @} end of RealFFT group
-*/
-
-/**
-* @brief Core Real FFT process
-* @param *pSrc points to the input buffer.
-* @param fftLen length of FFT.
-* @param *pATable points to the A twiddle Coef buffer.
-* @param *pBTable points to the B twiddle Coef buffer.
-* @param *pDst points to the output buffer.
-* @param modifier twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.
-* @return none.
-* The function implements a Real FFT
-*/
-
-void arm_split_rfft_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- q15_t * pATable,
- q15_t * pBTable,
- q15_t * pDst,
- uint32_t modifier)
-{
- uint32_t i; /* Loop Counter */
- q31_t outR, outI; /* Temporary variables for output */
- q15_t *pCoefA, *pCoefB; /* Temporary pointers for twiddle factors */
- q15_t *pSrc1, *pSrc2;
-#if defined (ARM_MATH_DSP)
- q15_t *pD1, *pD2;
-#endif
-
- // pSrc[2U * fftLen] = pSrc[0];
- // pSrc[(2U * fftLen) + 1U] = pSrc[1];
-
- pCoefA = &pATable[modifier * 2U];
- pCoefB = &pBTable[modifier * 2U];
-
- pSrc1 = &pSrc[2];
- pSrc2 = &pSrc[(2U * fftLen) - 2U];
-
-#if defined (ARM_MATH_DSP)
-
- /* Run the below code for Cortex-M4 and Cortex-M3 */
- i = 1U;
- pD1 = pDst + 2;
- pD2 = pDst + (4U * fftLen) - 2;
-
- for(i = fftLen - 1; i > 0; i--)
- {
- /*
- outR = (pSrc[2 * i] * pATable[2 * i] - pSrc[2 * i + 1] * pATable[2 * i + 1]
- + pSrc[2 * n - 2 * i] * pBTable[2 * i] +
- pSrc[2 * n - 2 * i + 1] * pBTable[2 * i + 1]);
- */
-
- /* outI = (pIn[2 * i + 1] * pATable[2 * i] + pIn[2 * i] * pATable[2 * i + 1] +
- pIn[2 * n - 2 * i] * pBTable[2 * i + 1] -
- pIn[2 * n - 2 * i + 1] * pBTable[2 * i]); */
-
-
-#ifndef ARM_MATH_BIG_ENDIAN
-
- /* pSrc[2 * i] * pATable[2 * i] - pSrc[2 * i + 1] * pATable[2 * i + 1] */
- outR = __SMUSD(*__SIMD32(pSrc1), *__SIMD32(pCoefA));
-
-#else
-
- /* -(pSrc[2 * i + 1] * pATable[2 * i + 1] - pSrc[2 * i] * pATable[2 * i]) */
- outR = -(__SMUSD(*__SIMD32(pSrc1), *__SIMD32(pCoefA)));
-
-#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
-
- /* pSrc[2 * n - 2 * i] * pBTable[2 * i] +
- pSrc[2 * n - 2 * i + 1] * pBTable[2 * i + 1]) */
- outR = __SMLAD(*__SIMD32(pSrc2), *__SIMD32(pCoefB), outR) >> 16U;
-
- /* pIn[2 * n - 2 * i] * pBTable[2 * i + 1] -
- pIn[2 * n - 2 * i + 1] * pBTable[2 * i] */
-
-#ifndef ARM_MATH_BIG_ENDIAN
-
- outI = __SMUSDX(*__SIMD32(pSrc2)--, *__SIMD32(pCoefB));
-
-#else
-
- outI = __SMUSDX(*__SIMD32(pCoefB), *__SIMD32(pSrc2)--);
-
-#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
-
- /* (pIn[2 * i + 1] * pATable[2 * i] + pIn[2 * i] * pATable[2 * i + 1] */
- outI = __SMLADX(*__SIMD32(pSrc1)++, *__SIMD32(pCoefA), outI);
-
- /* write output */
- *pD1++ = (q15_t) outR;
- *pD1++ = outI >> 16U;
-
- /* write complex conjugate output */
- pD2[0] = (q15_t) outR;
- pD2[1] = -(outI >> 16U);
- pD2 -= 2;
-
- /* update coefficient pointer */
- pCoefB = pCoefB + (2U * modifier);
- pCoefA = pCoefA + (2U * modifier);
- }
-
- pDst[2U * fftLen] = (pSrc[0] - pSrc[1]) >> 1;
- pDst[(2U * fftLen) + 1U] = 0;
-
- pDst[0] = (pSrc[0] + pSrc[1]) >> 1;
- pDst[1] = 0;
-
-#else
-
- /* Run the below code for Cortex-M0 */
- i = 1U;
-
- while (i < fftLen)
- {
- /*
- outR = (pSrc[2 * i] * pATable[2 * i] - pSrc[2 * i + 1] * pATable[2 * i + 1]
- + pSrc[2 * n - 2 * i] * pBTable[2 * i] +
- pSrc[2 * n - 2 * i + 1] * pBTable[2 * i + 1]);
- */
-
- outR = *pSrc1 * *pCoefA;
- outR = outR - (*(pSrc1 + 1) * *(pCoefA + 1));
- outR = outR + (*pSrc2 * *pCoefB);
- outR = (outR + (*(pSrc2 + 1) * *(pCoefB + 1))) >> 16;
-
-
- /* outI = (pIn[2 * i + 1] * pATable[2 * i] + pIn[2 * i] * pATable[2 * i + 1] +
- pIn[2 * n - 2 * i] * pBTable[2 * i + 1] -
- pIn[2 * n - 2 * i + 1] * pBTable[2 * i]);
- */
-
- outI = *pSrc2 * *(pCoefB + 1);
- outI = outI - (*(pSrc2 + 1) * *pCoefB);
- outI = outI + (*(pSrc1 + 1) * *pCoefA);
- outI = outI + (*pSrc1 * *(pCoefA + 1));
-
- /* update input pointers */
- pSrc1 += 2U;
- pSrc2 -= 2U;
-
- /* write output */
- pDst[2U * i] = (q15_t) outR;
- pDst[(2U * i) + 1U] = outI >> 16U;
-
- /* write complex conjugate output */
- pDst[(4U * fftLen) - (2U * i)] = (q15_t) outR;
- pDst[((4U * fftLen) - (2U * i)) + 1U] = -(outI >> 16U);
-
- /* update coefficient pointer */
- pCoefB = pCoefB + (2U * modifier);
- pCoefA = pCoefA + (2U * modifier);
-
- i++;
- }
-
- pDst[2U * fftLen] = (pSrc[0] - pSrc[1]) >> 1;
- pDst[(2U * fftLen) + 1U] = 0;
-
- pDst[0] = (pSrc[0] + pSrc[1]) >> 1;
- pDst[1] = 0;
-
-#endif /* #if defined (ARM_MATH_DSP) */
-}
-
-
-/**
-* @brief Core Real IFFT process
-* @param[in] *pSrc points to the input buffer.
-* @param[in] fftLen length of FFT.
-* @param[in] *pATable points to the twiddle Coef A buffer.
-* @param[in] *pBTable points to the twiddle Coef B buffer.
-* @param[out] *pDst points to the output buffer.
-* @param[in] modifier twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.
-* @return none.
-* The function implements a Real IFFT
-*/
-void arm_split_rifft_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- q15_t * pATable,
- q15_t * pBTable,
- q15_t * pDst,
- uint32_t modifier)
-{
- uint32_t i; /* Loop Counter */
- q31_t outR, outI; /* Temporary variables for output */
- q15_t *pCoefA, *pCoefB; /* Temporary pointers for twiddle factors */
- q15_t *pSrc1, *pSrc2;
- q15_t *pDst1 = &pDst[0];
-
- pCoefA = &pATable[0];
- pCoefB = &pBTable[0];
-
- pSrc1 = &pSrc[0];
- pSrc2 = &pSrc[2U * fftLen];
-
-#if defined (ARM_MATH_DSP)
-
- /* Run the below code for Cortex-M4 and Cortex-M3 */
- i = fftLen;
-
- while (i > 0U)
- {
- /*
- outR = (pIn[2 * i] * pATable[2 * i] + pIn[2 * i + 1] * pATable[2 * i + 1] +
- pIn[2 * n - 2 * i] * pBTable[2 * i] -
- pIn[2 * n - 2 * i + 1] * pBTable[2 * i + 1]);
-
- outI = (pIn[2 * i + 1] * pATable[2 * i] - pIn[2 * i] * pATable[2 * i + 1] -
- pIn[2 * n - 2 * i] * pBTable[2 * i + 1] -
- pIn[2 * n - 2 * i + 1] * pBTable[2 * i]);
- */
-
-
-#ifndef ARM_MATH_BIG_ENDIAN
-
- /* pIn[2 * n - 2 * i] * pBTable[2 * i] -
- pIn[2 * n - 2 * i + 1] * pBTable[2 * i + 1]) */
- outR = __SMUSD(*__SIMD32(pSrc2), *__SIMD32(pCoefB));
-
-#else
-
- /* -(-pIn[2 * n - 2 * i] * pBTable[2 * i] +
- pIn[2 * n - 2 * i + 1] * pBTable[2 * i + 1])) */
- outR = -(__SMUSD(*__SIMD32(pSrc2), *__SIMD32(pCoefB)));
-
-#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
-
- /* pIn[2 * i] * pATable[2 * i] + pIn[2 * i + 1] * pATable[2 * i + 1] +
- pIn[2 * n - 2 * i] * pBTable[2 * i] */
- outR = __SMLAD(*__SIMD32(pSrc1), *__SIMD32(pCoefA), outR) >> 16U;
-
- /*
- -pIn[2 * n - 2 * i] * pBTable[2 * i + 1] +
- pIn[2 * n - 2 * i + 1] * pBTable[2 * i] */
- outI = __SMUADX(*__SIMD32(pSrc2)--, *__SIMD32(pCoefB));
-
- /* pIn[2 * i + 1] * pATable[2 * i] - pIn[2 * i] * pATable[2 * i + 1] */
-
-#ifndef ARM_MATH_BIG_ENDIAN
-
- outI = __SMLSDX(*__SIMD32(pCoefA), *__SIMD32(pSrc1)++, -outI);
-
-#else
-
- outI = __SMLSDX(*__SIMD32(pSrc1)++, *__SIMD32(pCoefA), -outI);
-
-#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
- /* write output */
-
-#ifndef ARM_MATH_BIG_ENDIAN
-
- *__SIMD32(pDst1)++ = __PKHBT(outR, (outI >> 16U), 16);
-
-#else
-
- *__SIMD32(pDst1)++ = __PKHBT((outI >> 16U), outR, 16);
-
-#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
-
- /* update coefficient pointer */
- pCoefB = pCoefB + (2U * modifier);
- pCoefA = pCoefA + (2U * modifier);
-
- i--;
- }
-#else
- /* Run the below code for Cortex-M0 */
- i = fftLen;
-
- while (i > 0U)
- {
- /*
- outR = (pIn[2 * i] * pATable[2 * i] + pIn[2 * i + 1] * pATable[2 * i + 1] +
- pIn[2 * n - 2 * i] * pBTable[2 * i] -
- pIn[2 * n - 2 * i + 1] * pBTable[2 * i + 1]);
- */
-
- outR = *pSrc2 * *pCoefB;
- outR = outR - (*(pSrc2 + 1) * *(pCoefB + 1));
- outR = outR + (*pSrc1 * *pCoefA);
- outR = (outR + (*(pSrc1 + 1) * *(pCoefA + 1))) >> 16;
-
- /*
- outI = (pIn[2 * i + 1] * pATable[2 * i] - pIn[2 * i] * pATable[2 * i + 1] -
- pIn[2 * n - 2 * i] * pBTable[2 * i + 1] -
- pIn[2 * n - 2 * i + 1] * pBTable[2 * i]);
- */
-
- outI = *(pSrc1 + 1) * *pCoefA;
- outI = outI - (*pSrc1 * *(pCoefA + 1));
- outI = outI - (*pSrc2 * *(pCoefB + 1));
- outI = outI - (*(pSrc2 + 1) * *(pCoefB));
-
- /* update input pointers */
- pSrc1 += 2U;
- pSrc2 -= 2U;
-
- /* write output */
- *pDst1++ = (q15_t) outR;
- *pDst1++ = (q15_t) (outI >> 16);
-
- /* update coefficient pointer */
- pCoefB = pCoefB + (2U * modifier);
- pCoefA = pCoefA + (2U * modifier);
-
- i--;
- }
-#endif /* #if defined (ARM_MATH_DSP) */
-}
|