diff options
Diffstat (limited to 'hid-dials/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_q15.c')
| -rw-r--r-- | hid-dials/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_q15.c | 345 |
1 files changed, 0 insertions, 345 deletions
diff --git a/hid-dials/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_q15.c b/hid-dials/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_q15.c deleted file mode 100644 index 0f5096e..0000000 --- a/hid-dials/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_q15.c +++ /dev/null @@ -1,345 +0,0 @@ -/* ----------------------------------------------------------------------
- * Project: CMSIS DSP Library
- * Title: arm_cfft_q15.c
- * Description: Combined Radix Decimation in Q15 Frequency CFFT processing 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"
-
-extern void arm_radix4_butterfly_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- q15_t * pCoef,
- uint32_t twidCoefModifier);
-
-extern void arm_radix4_butterfly_inverse_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- q15_t * pCoef,
- uint32_t twidCoefModifier);
-
-extern void arm_bitreversal_16(
- uint16_t * pSrc,
- const uint16_t bitRevLen,
- const uint16_t * pBitRevTable);
-
-void arm_cfft_radix4by2_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- const q15_t * pCoef);
-
-void arm_cfft_radix4by2_inverse_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- const q15_t * pCoef);
-
-/**
-* @ingroup groupTransforms
-*/
-
-/**
-* @addtogroup ComplexFFT
-* @{
-*/
-
-/**
-* @details
-* @brief Processing function for the Q15 complex FFT.
-* @param[in] *S points to an instance of the Q15 CFFT structure.
-* @param[in, out] *p1 points to the complex data buffer of size <code>2*fftLen</code>. Processing occurs in-place.
-* @param[in] ifftFlag flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform.
-* @param[in] bitReverseFlag flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output.
-* @return none.
-*/
-
-void arm_cfft_q15(
- const arm_cfft_instance_q15 * S,
- q15_t * p1,
- uint8_t ifftFlag,
- uint8_t bitReverseFlag)
-{
- uint32_t L = S->fftLen;
-
- if (ifftFlag == 1U)
- {
- switch (L)
- {
- case 16:
- case 64:
- case 256:
- case 1024:
- case 4096:
- arm_radix4_butterfly_inverse_q15 ( p1, L, (q15_t*)S->pTwiddle, 1 );
- break;
-
- case 32:
- case 128:
- case 512:
- case 2048:
- arm_cfft_radix4by2_inverse_q15 ( p1, L, S->pTwiddle );
- break;
- }
- }
- else
- {
- switch (L)
- {
- case 16:
- case 64:
- case 256:
- case 1024:
- case 4096:
- arm_radix4_butterfly_q15 ( p1, L, (q15_t*)S->pTwiddle, 1 );
- break;
-
- case 32:
- case 128:
- case 512:
- case 2048:
- arm_cfft_radix4by2_q15 ( p1, L, S->pTwiddle );
- break;
- }
- }
-
- if ( bitReverseFlag )
- arm_bitreversal_16((uint16_t*)p1,S->bitRevLength,S->pBitRevTable);
-}
-
-/**
-* @} end of ComplexFFT group
-*/
-
-void arm_cfft_radix4by2_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- const q15_t * pCoef)
-{
- uint32_t i;
- uint32_t n2;
- q15_t p0, p1, p2, p3;
-#if defined (ARM_MATH_DSP)
- q31_t T, S, R;
- q31_t coeff, out1, out2;
- const q15_t *pC = pCoef;
- q15_t *pSi = pSrc;
- q15_t *pSl = pSrc + fftLen;
-#else
- uint32_t ia, l;
- q15_t xt, yt, cosVal, sinVal;
-#endif
-
- n2 = fftLen >> 1;
-
-#if defined (ARM_MATH_DSP)
-
- for (i = n2; i > 0; i--)
- {
- coeff = _SIMD32_OFFSET(pC);
- pC += 2;
-
- T = _SIMD32_OFFSET(pSi);
- T = __SHADD16(T, 0); // this is just a SIMD arithmetic shift right by 1
-
- S = _SIMD32_OFFSET(pSl);
- S = __SHADD16(S, 0); // this is just a SIMD arithmetic shift right by 1
-
- R = __QSUB16(T, S);
-
- _SIMD32_OFFSET(pSi) = __SHADD16(T, S);
- pSi += 2;
-
- #ifndef ARM_MATH_BIG_ENDIAN
-
- out1 = __SMUAD(coeff, R) >> 16;
- out2 = __SMUSDX(coeff, R);
-
- #else
-
- out1 = __SMUSDX(R, coeff) >> 16U;
- out2 = __SMUAD(coeff, R);
-
- #endif // #ifndef ARM_MATH_BIG_ENDIAN
-
- _SIMD32_OFFSET(pSl) =
- (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF);
- pSl += 2;
- }
-
-#else // #if defined (ARM_MATH_DSP)
-
- ia = 0;
- for (i = 0; i < n2; i++)
- {
- cosVal = pCoef[ia * 2];
- sinVal = pCoef[(ia * 2) + 1];
- ia++;
-
- l = i + n2;
-
- xt = (pSrc[2 * i] >> 1U) - (pSrc[2 * l] >> 1U);
- pSrc[2 * i] = ((pSrc[2 * i] >> 1U) + (pSrc[2 * l] >> 1U)) >> 1U;
-
- yt = (pSrc[2 * i + 1] >> 1U) - (pSrc[2 * l + 1] >> 1U);
- pSrc[2 * i + 1] =
- ((pSrc[2 * l + 1] >> 1U) + (pSrc[2 * i + 1] >> 1U)) >> 1U;
-
- pSrc[2U * l] = (((int16_t) (((q31_t) xt * cosVal) >> 16)) +
- ((int16_t) (((q31_t) yt * sinVal) >> 16)));
-
- pSrc[2U * l + 1U] = (((int16_t) (((q31_t) yt * cosVal) >> 16)) -
- ((int16_t) (((q31_t) xt * sinVal) >> 16)));
- }
-
-#endif // #if defined (ARM_MATH_DSP)
-
- // first col
- arm_radix4_butterfly_q15( pSrc, n2, (q15_t*)pCoef, 2U);
- // second col
- arm_radix4_butterfly_q15( pSrc + fftLen, n2, (q15_t*)pCoef, 2U);
-
- for (i = 0; i < fftLen >> 1; i++)
- {
- p0 = pSrc[4*i+0];
- p1 = pSrc[4*i+1];
- p2 = pSrc[4*i+2];
- p3 = pSrc[4*i+3];
-
- p0 <<= 1;
- p1 <<= 1;
- p2 <<= 1;
- p3 <<= 1;
-
- pSrc[4*i+0] = p0;
- pSrc[4*i+1] = p1;
- pSrc[4*i+2] = p2;
- pSrc[4*i+3] = p3;
- }
-}
-
-void arm_cfft_radix4by2_inverse_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- const q15_t * pCoef)
-{
- uint32_t i;
- uint32_t n2;
- q15_t p0, p1, p2, p3;
-#if defined (ARM_MATH_DSP)
- q31_t T, S, R;
- q31_t coeff, out1, out2;
- const q15_t *pC = pCoef;
- q15_t *pSi = pSrc;
- q15_t *pSl = pSrc + fftLen;
-#else
- uint32_t ia, l;
- q15_t xt, yt, cosVal, sinVal;
-#endif
-
- n2 = fftLen >> 1;
-
-#if defined (ARM_MATH_DSP)
-
- for (i = n2; i > 0; i--)
- {
- coeff = _SIMD32_OFFSET(pC);
- pC += 2;
-
- T = _SIMD32_OFFSET(pSi);
- T = __SHADD16(T, 0); // this is just a SIMD arithmetic shift right by 1
-
- S = _SIMD32_OFFSET(pSl);
- S = __SHADD16(S, 0); // this is just a SIMD arithmetic shift right by 1
-
- R = __QSUB16(T, S);
-
- _SIMD32_OFFSET(pSi) = __SHADD16(T, S);
- pSi += 2;
-
- #ifndef ARM_MATH_BIG_ENDIAN
-
- out1 = __SMUSD(coeff, R) >> 16;
- out2 = __SMUADX(coeff, R);
- #else
-
- out1 = __SMUADX(R, coeff) >> 16U;
- out2 = __SMUSD(__QSUB(0, coeff), R);
-
- #endif // #ifndef ARM_MATH_BIG_ENDIAN
-
- _SIMD32_OFFSET(pSl) =
- (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF);
- pSl += 2;
- }
-
-#else // #if defined (ARM_MATH_DSP)
-
- ia = 0;
- for (i = 0; i < n2; i++)
- {
- cosVal = pCoef[ia * 2];
- sinVal = pCoef[(ia * 2) + 1];
- ia++;
-
- l = i + n2;
- xt = (pSrc[2 * i] >> 1U) - (pSrc[2 * l] >> 1U);
- pSrc[2 * i] = ((pSrc[2 * i] >> 1U) + (pSrc[2 * l] >> 1U)) >> 1U;
-
- yt = (pSrc[2 * i + 1] >> 1U) - (pSrc[2 * l + 1] >> 1U);
- pSrc[2 * i + 1] =
- ((pSrc[2 * l + 1] >> 1U) + (pSrc[2 * i + 1] >> 1U)) >> 1U;
-
- pSrc[2U * l] = (((int16_t) (((q31_t) xt * cosVal) >> 16)) -
- ((int16_t) (((q31_t) yt * sinVal) >> 16)));
-
- pSrc[2U * l + 1U] = (((int16_t) (((q31_t) yt * cosVal) >> 16)) +
- ((int16_t) (((q31_t) xt * sinVal) >> 16)));
- }
-
-#endif // #if defined (ARM_MATH_DSP)
-
- // first col
- arm_radix4_butterfly_inverse_q15( pSrc, n2, (q15_t*)pCoef, 2U);
- // second col
- arm_radix4_butterfly_inverse_q15( pSrc + fftLen, n2, (q15_t*)pCoef, 2U);
-
- for (i = 0; i < fftLen >> 1; i++)
- {
- p0 = pSrc[4*i+0];
- p1 = pSrc[4*i+1];
- p2 = pSrc[4*i+2];
- p3 = pSrc[4*i+3];
-
- p0 <<= 1;
- p1 <<= 1;
- p2 <<= 1;
- p3 <<= 1;
-
- pSrc[4*i+0] = p0;
- pSrc[4*i+1] = p1;
- pSrc[4*i+2] = p2;
- pSrc[4*i+3] = p3;
- }
-}
-
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