diff options
author | Jack Humbert <jack.humb@gmail.com> | 2016-06-18 14:30:24 -0400 |
---|---|---|
committer | GitHub <noreply@github.com> | 2016-06-18 14:30:24 -0400 |
commit | db32864ce7029d758f57729cc2f75e051a28d0a2 (patch) | |
tree | f3ac60d9c826a9ad5ef5bc4d199efaddae156ba6 /tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/TransformFunctions/arm_cfft_radix2_q15.c | |
parent | 1923cffd41d9d71cd9f434092654dba05513137b (diff) |
Cleans up quantum/keymap situation, removes extra lufa folders (#416)
* sorts out keycodes
* move midi around
* remove mbed
* replaces keymap with qmk/keymap_common
* fixes keymap.h
* keymap, config, quantum rearrange
* removes unneeded lufa stuff
Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/TransformFunctions/arm_cfft_radix2_q15.c')
-rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/TransformFunctions/arm_cfft_radix2_q15.c | 741 |
1 files changed, 0 insertions, 741 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/TransformFunctions/arm_cfft_radix2_q15.c b/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/TransformFunctions/arm_cfft_radix2_q15.c deleted file mode 100644 index 0caf6021d9..0000000000 --- a/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/TransformFunctions/arm_cfft_radix2_q15.c +++ /dev/null @@ -1,741 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2013 ARM Limited. All rights reserved. -* -* $Date: 17. January 2013 -* $Revision: V1.4.1 -* -* Project: CMSIS DSP Library -* Title: arm_cfft_radix2_q15.c -* -* Description: Radix-2 Decimation in Frequency CFFT & CIFFT Fixed point processing function -* -* -* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions -* are met: -* - Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* - Redistributions in binary form must reproduce the above copyright -* notice, this list of conditions and the following disclaimer in -* the documentation and/or other materials provided with the -* distribution. -* - Neither the name of ARM LIMITED nor the names of its contributors -* may be used to endorse or promote products derived from this -* software without specific prior written permission. -* -* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -* POSSIBILITY OF SUCH DAMAGE. -* -------------------------------------------------------------------- */ - -#include "arm_math.h" - -void arm_radix2_butterfly_q15( - q15_t * pSrc, - uint32_t fftLen, - q15_t * pCoef, - uint16_t twidCoefModifier); - -void arm_radix2_butterfly_inverse_q15( - q15_t * pSrc, - uint32_t fftLen, - q15_t * pCoef, - uint16_t twidCoefModifier); - -void arm_bitreversal_q15( - q15_t * pSrc, - uint32_t fftLen, - uint16_t bitRevFactor, - uint16_t * pBitRevTab); - -/** - * @ingroup groupTransforms - */ - -/** - * @addtogroup ComplexFFT - * @{ - */ - -/** - * @details - * @brief Processing function for the fixed-point CFFT/CIFFT. - * @param[in] *S points to an instance of the fixed-point CFFT/CIFFT structure. - * @param[in, out] *pSrc points to the complex data buffer of size <code>2*fftLen</code>. Processing occurs in-place. - * @return none. - */ - -void arm_cfft_radix2_q15( - const arm_cfft_radix2_instance_q15 * S, - q15_t * pSrc) -{ - - if(S->ifftFlag == 1u) - { - arm_radix2_butterfly_inverse_q15(pSrc, S->fftLen, - S->pTwiddle, S->twidCoefModifier); - } - else - { - arm_radix2_butterfly_q15(pSrc, S->fftLen, - S->pTwiddle, S->twidCoefModifier); - } - - arm_bitreversal_q15(pSrc, S->fftLen, S->bitRevFactor, S->pBitRevTable); -} - -/** - * @} end of ComplexFFT group - */ - -void arm_radix2_butterfly_q15( - q15_t * pSrc, - uint32_t fftLen, - q15_t * pCoef, - uint16_t twidCoefModifier) -{ -#ifndef ARM_MATH_CM0_FAMILY - - unsigned i, j, k, l; - unsigned n1, n2, ia; - q15_t in; - q31_t T, S, R; - q31_t coeff, out1, out2; - - //N = fftLen; - n2 = fftLen; - - n1 = n2; - n2 = n2 >> 1; - ia = 0; - - // loop for groups - for (i = 0; i < n2; i++) - { - coeff = _SIMD32_OFFSET(pCoef + (ia * 2u)); - - ia = ia + twidCoefModifier; - - l = i + n2; - - T = _SIMD32_OFFSET(pSrc + (2 * i)); - in = ((int16_t) (T & 0xFFFF)) >> 2; - T = ((T >> 2) & 0xFFFF0000) | (in & 0xFFFF); - - S = _SIMD32_OFFSET(pSrc + (2 * l)); - in = ((int16_t) (S & 0xFFFF)) >> 2; - S = ((S >> 2) & 0xFFFF0000) | (in & 0xFFFF); - - R = __QSUB16(T, S); - - _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S); - -#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(pSrc + (2u * l)) = - (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF); - - coeff = _SIMD32_OFFSET(pCoef + (ia * 2u)); - - ia = ia + twidCoefModifier; - - // loop for butterfly - i++; - l++; - - T = _SIMD32_OFFSET(pSrc + (2 * i)); - in = ((int16_t) (T & 0xFFFF)) >> 2; - T = ((T >> 2) & 0xFFFF0000) | (in & 0xFFFF); - - S = _SIMD32_OFFSET(pSrc + (2 * l)); - in = ((int16_t) (S & 0xFFFF)) >> 2; - S = ((S >> 2) & 0xFFFF0000) | (in & 0xFFFF); - - R = __QSUB16(T, S); - - _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S); - -#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(pSrc + (2u * l)) = - (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF); - - } // groups loop end - - twidCoefModifier = twidCoefModifier << 1u; - - // loop for stage - for (k = fftLen / 2; k > 2; k = k >> 1) - { - n1 = n2; - n2 = n2 >> 1; - ia = 0; - - // loop for groups - for (j = 0; j < n2; j++) - { - coeff = _SIMD32_OFFSET(pCoef + (ia * 2u)); - - ia = ia + twidCoefModifier; - - // loop for butterfly - for (i = j; i < fftLen; i += n1) - { - l = i + n2; - - T = _SIMD32_OFFSET(pSrc + (2 * i)); - - S = _SIMD32_OFFSET(pSrc + (2 * l)); - - R = __QSUB16(T, S); - - _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S); - -#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(pSrc + (2u * l)) = - (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF); - - i += n1; - - l = i + n2; - - T = _SIMD32_OFFSET(pSrc + (2 * i)); - - S = _SIMD32_OFFSET(pSrc + (2 * l)); - - R = __QSUB16(T, S); - - _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S); - -#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(pSrc + (2u * l)) = - (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF); - - } // butterfly loop end - - } // groups loop end - - twidCoefModifier = twidCoefModifier << 1u; - } // stages loop end - - n1 = n2; - n2 = n2 >> 1; - ia = 0; - - coeff = _SIMD32_OFFSET(pCoef + (ia * 2u)); - - ia = ia + twidCoefModifier; - - // loop for butterfly - for (i = 0; i < fftLen; i += n1) - { - l = i + n2; - - T = _SIMD32_OFFSET(pSrc + (2 * i)); - - S = _SIMD32_OFFSET(pSrc + (2 * l)); - - R = __QSUB16(T, S); - - _SIMD32_OFFSET(pSrc + (2 * i)) = __QADD16(T, S); - - _SIMD32_OFFSET(pSrc + (2u * l)) = R; - - i += n1; - l = i + n2; - - T = _SIMD32_OFFSET(pSrc + (2 * i)); - - S = _SIMD32_OFFSET(pSrc + (2 * l)); - - R = __QSUB16(T, S); - - _SIMD32_OFFSET(pSrc + (2 * i)) = __QADD16(T, S); - - _SIMD32_OFFSET(pSrc + (2u * l)) = R; - - } // groups loop end - - -#else - - unsigned i, j, k, l; - unsigned n1, n2, ia; - q15_t xt, yt, cosVal, sinVal; - - - //N = fftLen; - n2 = fftLen; - - n1 = n2; - n2 = n2 >> 1; - ia = 0; - - // loop for groups - for (j = 0; j < n2; j++) - { - cosVal = pCoef[ia * 2]; - sinVal = pCoef[(ia * 2) + 1]; - ia = ia + twidCoefModifier; - - // loop for butterfly - for (i = j; i < fftLen; i += n1) - { - l = i + n2; - xt = (pSrc[2 * i] >> 2u) - (pSrc[2 * l] >> 2u); - pSrc[2 * i] = ((pSrc[2 * i] >> 2u) + (pSrc[2 * l] >> 2u)) >> 1u; - - yt = (pSrc[2 * i + 1] >> 2u) - (pSrc[2 * l + 1] >> 2u); - pSrc[2 * i + 1] = - ((pSrc[2 * l + 1] >> 2u) + (pSrc[2 * i + 1] >> 2u)) >> 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))); - - } // butterfly loop end - - } // groups loop end - - twidCoefModifier = twidCoefModifier << 1u; - - // loop for stage - for (k = fftLen / 2; k > 2; k = k >> 1) - { - n1 = n2; - n2 = n2 >> 1; - ia = 0; - - // loop for groups - for (j = 0; j < n2; j++) - { - cosVal = pCoef[ia * 2]; - sinVal = pCoef[(ia * 2) + 1]; - ia = ia + twidCoefModifier; - - // loop for butterfly - for (i = j; i < fftLen; i += n1) - { - l = i + n2; - xt = pSrc[2 * i] - pSrc[2 * l]; - pSrc[2 * i] = (pSrc[2 * i] + pSrc[2 * l]) >> 1u; - - yt = pSrc[2 * i + 1] - pSrc[2 * l + 1]; - pSrc[2 * i + 1] = (pSrc[2 * l + 1] + pSrc[2 * i + 1]) >> 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))); - - } // butterfly loop end - - } // groups loop end - - twidCoefModifier = twidCoefModifier << 1u; - } // stages loop end - - n1 = n2; - n2 = n2 >> 1; - ia = 0; - - // loop for groups - for (j = 0; j < n2; j++) - { - cosVal = pCoef[ia * 2]; - sinVal = pCoef[(ia * 2) + 1]; - - ia = ia + twidCoefModifier; - - // loop for butterfly - for (i = j; i < fftLen; i += n1) - { - l = i + n2; - xt = pSrc[2 * i] - pSrc[2 * l]; - pSrc[2 * i] = (pSrc[2 * i] + pSrc[2 * l]); - - yt = pSrc[2 * i + 1] - pSrc[2 * l + 1]; - pSrc[2 * i + 1] = (pSrc[2 * l + 1] + pSrc[2 * i + 1]); - - pSrc[2u * l] = xt; - - pSrc[2u * l + 1u] = yt; - - } // butterfly loop end - - } // groups loop end - - twidCoefModifier = twidCoefModifier << 1u; - -#endif // #ifndef ARM_MATH_CM0_FAMILY - -} - - -void arm_radix2_butterfly_inverse_q15( - q15_t * pSrc, - uint32_t fftLen, - q15_t * pCoef, - uint16_t twidCoefModifier) -{ -#ifndef ARM_MATH_CM0_FAMILY - - unsigned i, j, k, l; - unsigned n1, n2, ia; - q15_t in; - q31_t T, S, R; - q31_t coeff, out1, out2; - - //N = fftLen; - n2 = fftLen; - - n1 = n2; - n2 = n2 >> 1; - ia = 0; - - // loop for groups - for (i = 0; i < n2; i++) - { - coeff = _SIMD32_OFFSET(pCoef + (ia * 2u)); - - ia = ia + twidCoefModifier; - - l = i + n2; - - T = _SIMD32_OFFSET(pSrc + (2 * i)); - in = ((int16_t) (T & 0xFFFF)) >> 2; - T = ((T >> 2) & 0xFFFF0000) | (in & 0xFFFF); - - S = _SIMD32_OFFSET(pSrc + (2 * l)); - in = ((int16_t) (S & 0xFFFF)) >> 2; - S = ((S >> 2) & 0xFFFF0000) | (in & 0xFFFF); - - R = __QSUB16(T, S); - - _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S); - -#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(pSrc + (2u * l)) = - (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF); - - coeff = _SIMD32_OFFSET(pCoef + (ia * 2u)); - - ia = ia + twidCoefModifier; - - // loop for butterfly - i++; - l++; - - T = _SIMD32_OFFSET(pSrc + (2 * i)); - in = ((int16_t) (T & 0xFFFF)) >> 2; - T = ((T >> 2) & 0xFFFF0000) | (in & 0xFFFF); - - S = _SIMD32_OFFSET(pSrc + (2 * l)); - in = ((int16_t) (S & 0xFFFF)) >> 2; - S = ((S >> 2) & 0xFFFF0000) | (in & 0xFFFF); - - R = __QSUB16(T, S); - - _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S); - -#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(pSrc + (2u * l)) = - (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF); - - } // groups loop end - - twidCoefModifier = twidCoefModifier << 1u; - - // loop for stage - for (k = fftLen / 2; k > 2; k = k >> 1) - { - n1 = n2; - n2 = n2 >> 1; - ia = 0; - - // loop for groups - for (j = 0; j < n2; j++) - { - coeff = _SIMD32_OFFSET(pCoef + (ia * 2u)); - - ia = ia + twidCoefModifier; - - // loop for butterfly - for (i = j; i < fftLen; i += n1) - { - l = i + n2; - - T = _SIMD32_OFFSET(pSrc + (2 * i)); - - S = _SIMD32_OFFSET(pSrc + (2 * l)); - - R = __QSUB16(T, S); - - _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S); - -#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(pSrc + (2u * l)) = - (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF); - - i += n1; - - l = i + n2; - - T = _SIMD32_OFFSET(pSrc + (2 * i)); - - S = _SIMD32_OFFSET(pSrc + (2 * l)); - - R = __QSUB16(T, S); - - _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S); - -#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(pSrc + (2u * l)) = - (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF); - - } // butterfly loop end - - } // groups loop end - - twidCoefModifier = twidCoefModifier << 1u; - } // stages loop end - - n1 = n2; - n2 = n2 >> 1; - ia = 0; - - // loop for groups - for (j = 0; j < n2; j++) - { - coeff = _SIMD32_OFFSET(pCoef + (ia * 2u)); - - ia = ia + twidCoefModifier; - - // loop for butterfly - for (i = j; i < fftLen; i += n1) - { - l = i + n2; - - T = _SIMD32_OFFSET(pSrc + (2 * i)); - - S = _SIMD32_OFFSET(pSrc + (2 * l)); - - R = __QSUB16(T, S); - - _SIMD32_OFFSET(pSrc + (2 * i)) = __QADD16(T, S); - - _SIMD32_OFFSET(pSrc + (2u * l)) = R; - - } // butterfly loop end - - } // groups loop end - - twidCoefModifier = twidCoefModifier << 1u; - -#else - - - unsigned i, j, k, l; - unsigned n1, n2, ia; - q15_t xt, yt, cosVal, sinVal; - - //N = fftLen; - n2 = fftLen; - - n1 = n2; - n2 = n2 >> 1; - ia = 0; - - // loop for groups - for (j = 0; j < n2; j++) - { - cosVal = pCoef[ia * 2]; - sinVal = pCoef[(ia * 2) + 1]; - ia = ia + twidCoefModifier; - - // loop for butterfly - for (i = j; i < fftLen; i += n1) - { - l = i + n2; - xt = (pSrc[2 * i] >> 2u) - (pSrc[2 * l] >> 2u); - pSrc[2 * i] = ((pSrc[2 * i] >> 2u) + (pSrc[2 * l] >> 2u)) >> 1u; - - yt = (pSrc[2 * i + 1] >> 2u) - (pSrc[2 * l + 1] >> 2u); - pSrc[2 * i + 1] = - ((pSrc[2 * l + 1] >> 2u) + (pSrc[2 * i + 1] >> 2u)) >> 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))); - - } // butterfly loop end - - } // groups loop end - - twidCoefModifier = twidCoefModifier << 1u; - - // loop for stage - for (k = fftLen / 2; k > 2; k = k >> 1) - { - n1 = n2; - n2 = n2 >> 1; - ia = 0; - - // loop for groups - for (j = 0; j < n2; j++) - { - cosVal = pCoef[ia * 2]; - sinVal = pCoef[(ia * 2) + 1]; - ia = ia + twidCoefModifier; - - // loop for butterfly - for (i = j; i < fftLen; i += n1) - { - l = i + n2; - xt = pSrc[2 * i] - pSrc[2 * l]; - pSrc[2 * i] = (pSrc[2 * i] + pSrc[2 * l]) >> 1u; - - yt = pSrc[2 * i + 1] - pSrc[2 * l + 1]; - pSrc[2 * i + 1] = (pSrc[2 * l + 1] + pSrc[2 * i + 1]) >> 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))); - - } // butterfly loop end - - } // groups loop end - - twidCoefModifier = twidCoefModifier << 1u; - } // stages loop end - - n1 = n2; - n2 = n2 >> 1; - ia = 0; - - cosVal = pCoef[ia * 2]; - sinVal = pCoef[(ia * 2) + 1]; - - ia = ia + twidCoefModifier; - - // loop for butterfly - for (i = 0; i < fftLen; i += n1) - { - l = i + n2; - xt = pSrc[2 * i] - pSrc[2 * l]; - pSrc[2 * i] = (pSrc[2 * i] + pSrc[2 * l]); - - yt = pSrc[2 * i + 1] - pSrc[2 * l + 1]; - pSrc[2 * i + 1] = (pSrc[2 * l + 1] + pSrc[2 * i + 1]); - - pSrc[2u * l] = xt; - - pSrc[2u * l + 1u] = yt; - - } // groups loop end - - -#endif // #ifndef ARM_MATH_CM0_FAMILY - -} |