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path: root/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_radix2_q15.c
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Diffstat (limited to 'Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_radix2_q15.c')
-rw-r--r--Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_radix2_q15.c422
1 files changed, 191 insertions, 231 deletions
diff --git a/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_radix2_q15.c b/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_radix2_q15.c
index 8880ab9c9..2a03b5771 100644
--- a/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_radix2_q15.c
+++ b/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_radix2_q15.c
@@ -3,13 +3,13 @@
* Title: arm_cfft_radix2_q15.c
* Description: Radix-2 Decimation in Frequency CFFT & CIFFT Fixed point processing function
*
- * $Date: 27. January 2017
- * $Revision: V.1.5.1
+ * $Date: 18. March 2019
+ * $Revision: V1.6.0
*
* Target Processor: Cortex-M cores
* -------------------------------------------------------------------- */
/*
- * Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
+ * Copyright (C) 2010-2019 ARM Limited or its affiliates. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
@@ -29,74 +29,71 @@
#include "arm_math.h"
void arm_radix2_butterfly_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- q15_t * pCoef,
- uint16_t twidCoefModifier);
+ q15_t * pSrc,
+ uint32_t fftLen,
+ const q15_t * pCoef,
+ uint16_t twidCoefModifier);
void arm_radix2_butterfly_inverse_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- q15_t * pCoef,
- uint16_t twidCoefModifier);
+ q15_t * pSrc,
+ uint32_t fftLen,
+ const q15_t * pCoef,
+ uint16_t twidCoefModifier);
void arm_bitreversal_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- uint16_t bitRevFactor,
- uint16_t * pBitRevTab);
+ q15_t * pSrc,
+ uint32_t fftLen,
+ uint16_t bitRevFactor,
+ const uint16_t * pBitRevTab);
/**
- * @ingroup groupTransforms
+ @ingroup groupTransforms
*/
/**
- * @addtogroup ComplexFFT
- * @{
+ @addtogroup ComplexFFT
+ @{
*/
/**
- * @details
- * @brief Processing function for the fixed-point CFFT/CIFFT.
- * @deprecated Do not use this function. It has been superseded by \ref arm_cfft_q15 and will be removed
- * @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.
+ @brief Processing function for the fixed-point CFFT/CIFFT.
+ @deprecated Do not use this function. It has been superseded by \ref arm_cfft_q15 and will be removed in the future.
+ @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)
+ q15_t * pSrc)
{
if (S->ifftFlag == 1U)
{
- arm_radix2_butterfly_inverse_q15(pSrc, S->fftLen,
- S->pTwiddle, S->twidCoefModifier);
+ 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_radix2_butterfly_q15 (pSrc, S->fftLen, S->pTwiddle, S->twidCoefModifier);
}
arm_bitreversal_q15(pSrc, S->fftLen, S->bitRevFactor, S->pBitRevTable);
}
/**
- * @} end of ComplexFFT group
+ @} end of ComplexFFT group
*/
void arm_radix2_butterfly_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- q15_t * pCoef,
- uint16_t twidCoefModifier)
+ q15_t * pSrc,
+ uint32_t fftLen,
+ const q15_t * pCoef,
+ uint16_t twidCoefModifier)
{
#if defined (ARM_MATH_DSP)
- unsigned i, j, k, l;
- unsigned n1, n2, ia;
+ uint32_t i, j, k, l;
+ uint32_t n1, n2, ia;
q15_t in;
q31_t T, S, R;
q31_t coeff, out1, out2;
@@ -111,215 +108,196 @@ void arm_radix2_butterfly_q15(
// loop for groups
for (i = 0; i < n2; i++)
{
- coeff = _SIMD32_OFFSET(pCoef + (ia * 2U));
+ coeff = read_q15x2 ((q15_t *)pCoef + (ia * 2U));
ia = ia + twidCoefModifier;
l = i + n2;
- T = _SIMD32_OFFSET(pSrc + (2 * i));
+ T = read_q15x2 (pSrc + (2 * i));
in = ((int16_t) (T & 0xFFFF)) >> 1;
T = ((T >> 1) & 0xFFFF0000) | (in & 0xFFFF);
- S = _SIMD32_OFFSET(pSrc + (2 * l));
+ S = read_q15x2 (pSrc + (2 * l));
in = ((int16_t) (S & 0xFFFF)) >> 1;
S = ((S >> 1) & 0xFFFF0000) | (in & 0xFFFF);
R = __QSUB16(T, S);
- _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S);
+ write_q15x2 (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 */
-#endif // #ifndef ARM_MATH_BIG_ENDIAN
+ write_q15x2 (pSrc + (2U * l), (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF));
- _SIMD32_OFFSET(pSrc + (2U * l)) =
- (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF);
-
- coeff = _SIMD32_OFFSET(pCoef + (ia * 2U));
+ coeff = read_q15x2 ((q15_t *)pCoef + (ia * 2U));
ia = ia + twidCoefModifier;
- // loop for butterfly
+ /* loop for butterfly */
i++;
l++;
- T = _SIMD32_OFFSET(pSrc + (2 * i));
+ T = read_q15x2 (pSrc + (2 * i));
in = ((int16_t) (T & 0xFFFF)) >> 1;
T = ((T >> 1) & 0xFFFF0000) | (in & 0xFFFF);
- S = _SIMD32_OFFSET(pSrc + (2 * l));
+ S = read_q15x2 (pSrc + (2 * l));
in = ((int16_t) (S & 0xFFFF)) >> 1;
S = ((S >> 1) & 0xFFFF0000) | (in & 0xFFFF);
R = __QSUB16(T, S);
- _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S);
+ write_q15x2 (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 */
-#endif // #ifndef ARM_MATH_BIG_ENDIAN
+ write_q15x2 (pSrc + (2U * l), (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF));
- _SIMD32_OFFSET(pSrc + (2U * l)) =
- (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF);
-
- } // groups loop end
+ } /* groups loop end */
twidCoefModifier = twidCoefModifier << 1U;
- // loop for stage
+ /* loop for stage */
for (k = fftLen / 2; k > 2; k = k >> 1)
{
n1 = n2;
n2 = n2 >> 1;
ia = 0;
- // loop for groups
+ /* loop for groups */
for (j = 0; j < n2; j++)
{
- coeff = _SIMD32_OFFSET(pCoef + (ia * 2U));
+ coeff = read_q15x2 ((q15_t *)pCoef + (ia * 2U));
ia = ia + twidCoefModifier;
- // loop for butterfly
+ /* loop for butterfly */
for (i = j; i < fftLen; i += n1)
{
l = i + n2;
- T = _SIMD32_OFFSET(pSrc + (2 * i));
+ T = read_q15x2 (pSrc + (2 * i));
- S = _SIMD32_OFFSET(pSrc + (2 * l));
+ S = read_q15x2 (pSrc + (2 * l));
R = __QSUB16(T, S);
- _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S);
+ write_q15x2 (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 */
-#endif // #ifndef ARM_MATH_BIG_ENDIAN
-
- _SIMD32_OFFSET(pSrc + (2U * l)) =
- (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF);
+ write_q15x2 (pSrc + (2U * l), (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF));
i += n1;
l = i + n2;
- T = _SIMD32_OFFSET(pSrc + (2 * i));
+ T = read_q15x2 (pSrc + (2 * i));
- S = _SIMD32_OFFSET(pSrc + (2 * l));
+ S = read_q15x2 (pSrc + (2 * l));
R = __QSUB16(T, S);
- _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S);
+ write_q15x2 (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 */
-#endif // #ifndef ARM_MATH_BIG_ENDIAN
-
- _SIMD32_OFFSET(pSrc + (2U * l)) =
- (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF);
+ write_q15x2 (pSrc + (2U * l), (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF));
- } // butterfly loop end
+ } /* butterfly loop end */
- } // groups loop end
+ } /* groups loop end */
twidCoefModifier = twidCoefModifier << 1U;
- } // stages loop end
+ } /* stages loop end */
n1 = n2;
n2 = n2 >> 1;
ia = 0;
- coeff = _SIMD32_OFFSET(pCoef + (ia * 2U));
+ coeff = read_q15x2 ((q15_t *)pCoef + (ia * 2U));
ia = ia + twidCoefModifier;
- // loop for butterfly
+ /* loop for butterfly */
for (i = 0; i < fftLen; i += n1)
{
l = i + n2;
- T = _SIMD32_OFFSET(pSrc + (2 * i));
+ T = read_q15x2 (pSrc + (2 * i));
- S = _SIMD32_OFFSET(pSrc + (2 * l));
+ S = read_q15x2 (pSrc + (2 * l));
R = __QSUB16(T, S);
- _SIMD32_OFFSET(pSrc + (2 * i)) = __QADD16(T, S);
+ write_q15x2 (pSrc + (2 * i), __QADD16(T, S));
- _SIMD32_OFFSET(pSrc + (2U * l)) = R;
+ write_q15x2 (pSrc + (2 * l), R);
i += n1;
l = i + n2;
- T = _SIMD32_OFFSET(pSrc + (2 * i));
+ T = read_q15x2 (pSrc + (2 * i));
- S = _SIMD32_OFFSET(pSrc + (2 * l));
+ S = read_q15x2 (pSrc + (2 * l));
R = __QSUB16(T, S);
- _SIMD32_OFFSET(pSrc + (2 * i)) = __QADD16(T, S);
+ write_q15x2 (pSrc + (2 * i), __QADD16(T, S));
- _SIMD32_OFFSET(pSrc + (2U * l)) = R;
+ write_q15x2 (pSrc + (2 * l), R);
- } // groups loop end
+ } /* groups loop end */
-#else
+#else /* #if defined (ARM_MATH_DSP) */
- unsigned i, j, k, l;
- unsigned n1, n2, ia;
+ uint32_t i, j, k, l;
+ uint32_t n1, n2, ia;
q15_t xt, yt, cosVal, sinVal;
- //N = fftLen;
+ // N = fftLen;
n2 = fftLen;
n1 = n2;
n2 = n2 >> 1;
ia = 0;
- // loop for groups
+ /* loop for groups */
for (j = 0; j < n2; j++)
{
- cosVal = pCoef[ia * 2];
+ cosVal = pCoef[(ia * 2)];
sinVal = pCoef[(ia * 2) + 1];
ia = ia + twidCoefModifier;
- // loop for butterfly
+ /* loop for butterfly */
for (i = j; i < fftLen; i += n1)
{
l = i + n2;
@@ -327,36 +305,36 @@ void arm_radix2_butterfly_q15(
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[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[2 * 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)));
+ pSrc[2U * l + 1] = (((int16_t) (((q31_t) yt * cosVal) >> 16)) -
+ ((int16_t) (((q31_t) xt * sinVal) >> 16)));
- } // butterfly loop end
+ } /* butterfly loop end */
- } // groups loop end
+ } /* groups loop end */
twidCoefModifier = twidCoefModifier << 1U;
- // loop for stage
+ /* loop for stage */
for (k = fftLen / 2; k > 2; k = k >> 1)
{
n1 = n2;
n2 = n2 >> 1;
ia = 0;
- // loop for groups
+ /* loop for groups */
for (j = 0; j < n2; j++)
{
cosVal = pCoef[ia * 2];
sinVal = pCoef[(ia * 2) + 1];
ia = ia + twidCoefModifier;
- // loop for butterfly
+ /* loop for butterfly */
for (i = j; i < fftLen; i += n1)
{
l = i + n2;
@@ -366,24 +344,24 @@ void arm_radix2_butterfly_q15(
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[2 * 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)));
+ pSrc[2U * l + 1] = (((int16_t) (((q31_t) yt * cosVal) >> 16)) -
+ ((int16_t) (((q31_t) xt * sinVal) >> 16)));
- } // butterfly loop end
+ } /* butterfly loop end */
- } // groups loop end
+ } /* groups loop end */
twidCoefModifier = twidCoefModifier << 1U;
- } // stages loop end
+ } /* stages loop end */
n1 = n2;
n2 = n2 >> 1;
ia = 0;
- // loop for groups
+ /* loop for groups */
for (j = 0; j < n2; j++)
{
cosVal = pCoef[ia * 2];
@@ -391,7 +369,7 @@ void arm_radix2_butterfly_q15(
ia = ia + twidCoefModifier;
- // loop for butterfly
+ /* loop for butterfly */
for (i = j; i < fftLen; i += n1)
{
l = i + n2;
@@ -401,244 +379,226 @@ void arm_radix2_butterfly_q15(
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[2 * l] = xt;
- pSrc[2U * l + 1U] = yt;
+ pSrc[2 * l + 1] = yt;
- } // butterfly loop end
+ } /* butterfly loop end */
- } // groups loop end
+ } /* groups loop end */
twidCoefModifier = twidCoefModifier << 1U;
-#endif // #if defined (ARM_MATH_DSP)
+#endif /* #if defined (ARM_MATH_DSP) */
}
void arm_radix2_butterfly_inverse_q15(
- q15_t * pSrc,
- uint32_t fftLen,
- q15_t * pCoef,
- uint16_t twidCoefModifier)
+ q15_t * pSrc,
+ uint32_t fftLen,
+ const q15_t * pCoef,
+ uint16_t twidCoefModifier)
{
#if defined (ARM_MATH_DSP)
- unsigned i, j, k, l;
- unsigned n1, n2, ia;
- q15_t in;
- q31_t T, S, R;
- q31_t coeff, out1, out2;
+ uint32_t i, j, k, l;
+ uint32_t n1, n2, ia;
+ q15_t in;
+ q31_t T, S, R;
+ q31_t coeff, out1, out2;
- //N = fftLen;
+ // N = fftLen;
n2 = fftLen;
n1 = n2;
n2 = n2 >> 1;
ia = 0;
- // loop for groups
+ /* loop for groups */
for (i = 0; i < n2; i++)
{
- coeff = _SIMD32_OFFSET(pCoef + (ia * 2U));
+ coeff = read_q15x2 ((q15_t *)pCoef + (ia * 2U));
ia = ia + twidCoefModifier;
l = i + n2;
- T = _SIMD32_OFFSET(pSrc + (2 * i));
+ T = read_q15x2 (pSrc + (2 * i));
in = ((int16_t) (T & 0xFFFF)) >> 1;
T = ((T >> 1) & 0xFFFF0000) | (in & 0xFFFF);
- S = _SIMD32_OFFSET(pSrc + (2 * l));
+ S = read_q15x2 (pSrc + (2 * l));
in = ((int16_t) (S & 0xFFFF)) >> 1;
S = ((S >> 1) & 0xFFFF0000) | (in & 0xFFFF);
R = __QSUB16(T, S);
- _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S);
+ write_q15x2 (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 */
-#endif // #ifndef ARM_MATH_BIG_ENDIAN
-
- _SIMD32_OFFSET(pSrc + (2U * l)) =
- (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF);
+ write_q15x2 (pSrc + (2 * l), (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF));
- coeff = _SIMD32_OFFSET(pCoef + (ia * 2U));
+ coeff = read_q15x2 ((q15_t *)pCoef + (ia * 2U));
ia = ia + twidCoefModifier;
- // loop for butterfly
+ /* loop for butterfly */
i++;
l++;
- T = _SIMD32_OFFSET(pSrc + (2 * i));
+ T = read_q15x2 (pSrc + (2 * i));
in = ((int16_t) (T & 0xFFFF)) >> 1;
T = ((T >> 1) & 0xFFFF0000) | (in & 0xFFFF);
- S = _SIMD32_OFFSET(pSrc + (2 * l));
+ S = read_q15x2 (pSrc + (2 * l));
in = ((int16_t) (S & 0xFFFF)) >> 1;
S = ((S >> 1) & 0xFFFF0000) | (in & 0xFFFF);
R = __QSUB16(T, S);
- _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S);
+ write_q15x2 (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 */
-#endif // #ifndef ARM_MATH_BIG_ENDIAN
-
- _SIMD32_OFFSET(pSrc + (2U * l)) =
- (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF);
+ write_q15x2 (pSrc + (2 * l), (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF));
- } // groups loop end
+ } /* groups loop end */
twidCoefModifier = twidCoefModifier << 1U;
- // loop for stage
+ /* loop for stage */
for (k = fftLen / 2; k > 2; k = k >> 1)
{
n1 = n2;
n2 = n2 >> 1;
ia = 0;
- // loop for groups
+ /* loop for groups */
for (j = 0; j < n2; j++)
{
- coeff = _SIMD32_OFFSET(pCoef + (ia * 2U));
+ coeff = read_q15x2 ((q15_t *)pCoef + (ia * 2U));
ia = ia + twidCoefModifier;
- // loop for butterfly
+ /* loop for butterfly */
for (i = j; i < fftLen; i += n1)
{
l = i + n2;
- T = _SIMD32_OFFSET(pSrc + (2 * i));
+ T = read_q15x2 (pSrc + (2 * i));
- S = _SIMD32_OFFSET(pSrc + (2 * l));
+ S = read_q15x2 (pSrc + (2 * l));
R = __QSUB16(T, S);
- _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S);
+ write_q15x2 (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 */
-#endif // #ifndef ARM_MATH_BIG_ENDIAN
-
- _SIMD32_OFFSET(pSrc + (2U * l)) =
- (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF);
+ write_q15x2 (pSrc + (2 * l), (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF));
i += n1;
l = i + n2;
- T = _SIMD32_OFFSET(pSrc + (2 * i));
+ T = read_q15x2 (pSrc + (2 * i));
- S = _SIMD32_OFFSET(pSrc + (2 * l));
+ S = read_q15x2 (pSrc + (2 * l));
R = __QSUB16(T, S);
- _SIMD32_OFFSET(pSrc + (2 * i)) = __SHADD16(T, S);
+ write_q15x2 (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 */
-#endif // #ifndef ARM_MATH_BIG_ENDIAN
-
- _SIMD32_OFFSET(pSrc + (2U * l)) =
- (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF);
+ write_q15x2 (pSrc + (2 * l), (q31_t) ((out2) & 0xFFFF0000) | (out1 & 0x0000FFFF));
- } // butterfly loop end
+ } /* butterfly loop end */
- } // groups loop end
+ } /* groups loop end */
twidCoefModifier = twidCoefModifier << 1U;
- } // stages loop end
+ } /* stages loop end */
n1 = n2;
n2 = n2 >> 1;
ia = 0;
- // loop for groups
+ /* loop for groups */
for (j = 0; j < n2; j++)
{
- coeff = _SIMD32_OFFSET(pCoef + (ia * 2U));
+ coeff = read_q15x2 ((q15_t *)pCoef + (ia * 2U));
ia = ia + twidCoefModifier;
- // loop for butterfly
+ /* loop for butterfly */
for (i = j; i < fftLen; i += n1)
{
l = i + n2;
- T = _SIMD32_OFFSET(pSrc + (2 * i));
+ T = read_q15x2 (pSrc + (2 * i));
- S = _SIMD32_OFFSET(pSrc + (2 * l));
+ S = read_q15x2 (pSrc + (2 * l));
R = __QSUB16(T, S);
- _SIMD32_OFFSET(pSrc + (2 * i)) = __QADD16(T, S);
+ write_q15x2 (pSrc + (2 * i), __QADD16(T, S));
- _SIMD32_OFFSET(pSrc + (2U * l)) = R;
+ write_q15x2 (pSrc + (2 * l), R);
- } // butterfly loop end
+ } /* butterfly loop end */
- } // groups loop end
+ } /* groups loop end */
twidCoefModifier = twidCoefModifier << 1U;
-#else
+#else /* #if defined (ARM_MATH_DSP) */
+ uint32_t i, j, k, l;
+ uint32_t n1, n2, ia;
+ q15_t xt, yt, cosVal, sinVal;
- unsigned i, j, k, l;
- unsigned n1, n2, ia;
- q15_t xt, yt, cosVal, sinVal;
-
- //N = fftLen;
+ // N = fftLen;
n2 = fftLen;
n1 = n2;
n2 = n2 >> 1;
ia = 0;
- // loop for groups
+ /* loop for groups */
for (j = 0; j < n2; j++)
{
- cosVal = pCoef[ia * 2];
+ cosVal = pCoef[(ia * 2)];
sinVal = pCoef[(ia * 2) + 1];
ia = ia + twidCoefModifier;
- // loop for butterfly
+ /* loop for butterfly */
for (i = j; i < fftLen; i += n1)
{
l = i + n2;
@@ -646,36 +606,36 @@ void arm_radix2_butterfly_inverse_q15(
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[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[2 * 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)));
+ pSrc[2 * l + 1] = (((int16_t) (((q31_t) yt * cosVal) >> 16)) +
+ ((int16_t) (((q31_t) xt * sinVal) >> 16)));
- } // butterfly loop end
+ } /* butterfly loop end */
- } // groups loop end
+ } /* groups loop end */
twidCoefModifier = twidCoefModifier << 1U;
- // loop for stage
+ /* loop for stage */
for (k = fftLen / 2; k > 2; k = k >> 1)
{
n1 = n2;
n2 = n2 >> 1;
ia = 0;
- // loop for groups
+ /* loop for groups */
for (j = 0; j < n2; j++)
{
- cosVal = pCoef[ia * 2];
+ cosVal = pCoef[(ia * 2)];
sinVal = pCoef[(ia * 2) + 1];
ia = ia + twidCoefModifier;
- // loop for butterfly
+ /* loop for butterfly */
for (i = j; i < fftLen; i += n1)
{
l = i + n2;
@@ -685,29 +645,29 @@ void arm_radix2_butterfly_inverse_q15(
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[2 * 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)));
+ pSrc[2 * l + 1] = (((int16_t) (((q31_t) yt * cosVal) >> 16)) +
+ ((int16_t) (((q31_t) xt * sinVal) >> 16)) );
- } // butterfly loop end
+ } /* butterfly loop end */
- } // groups loop end
+ } /* groups loop end */
twidCoefModifier = twidCoefModifier << 1U;
- } // stages loop end
+ } /* stages loop end */
n1 = n2;
n2 = n2 >> 1;
ia = 0;
- cosVal = pCoef[ia * 2];
+ cosVal = pCoef[(ia * 2)];
sinVal = pCoef[(ia * 2) + 1];
ia = ia + twidCoefModifier;
- // loop for butterfly
+ /* loop for butterfly */
for (i = 0; i < fftLen; i += n1)
{
l = i + n2;
@@ -717,13 +677,13 @@ void arm_radix2_butterfly_inverse_q15(
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[2 * l] = xt;
- pSrc[2U * l + 1U] = yt;
+ pSrc[2 * l + 1] = yt;
- } // groups loop end
+ } /* groups loop end */
-#endif // #if defined (ARM_MATH_DSP)
+#endif /* #if defined (ARM_MATH_DSP) */
}
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