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Added correct temperature conversions to RTD version
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* Copyright (C) 2010-2013 ARM Limited. All rights reserved.
*
* $Date: 17. January 2013
* $Revision: V1.4.1
*
* Project: CMSIS DSP Library
* Title: arm_cmplx_mult_cmplx_q31.c
*
* Description: Q31 complex-by-complex multiplication
*
* 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"
/**
* @ingroup groupCmplxMath
*/
/**
* @addtogroup CmplxByCmplxMult
* @{
*/
/**
* @brief Q31 complex-by-complex multiplication
* @param[in] *pSrcA points to the first input vector
* @param[in] *pSrcB points to the second input vector
* @param[out] *pDst points to the output vector
* @param[in] numSamples number of complex samples in each vector
* @return none.
*
* <b>Scaling and Overflow Behavior:</b>
* \par
* The function implements 1.31 by 1.31 multiplications and finally output is converted into 3.29 format.
* Input down scaling is not required.
*/
void arm_cmplx_mult_cmplx_q31(
q31_t * pSrcA,
q31_t * pSrcB,
q31_t * pDst,
uint32_t numSamples)
{
q31_t a, b, c, d; /* Temporary variables to store real and imaginary values */
uint32_t blkCnt; /* loop counters */
q31_t mul1, mul2, mul3, mul4;
q31_t out1, out2;
#ifndef ARM_MATH_CM0_FAMILY
/* Run the below code for Cortex-M4 and Cortex-M3 */
/* loop Unrolling */
blkCnt = numSamples >> 2u;
/* First part of the processing with loop unrolling. Compute 4 outputs at a time.
** a second loop below computes the remaining 1 to 3 samples. */
while(blkCnt > 0u)
{
/* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */
/* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */
a = *pSrcA++;
b = *pSrcA++;
c = *pSrcB++;
d = *pSrcB++;
mul1 = (q31_t) (((q63_t) a * c) >> 32);
mul2 = (q31_t) (((q63_t) b * d) >> 32);
mul3 = (q31_t) (((q63_t) a * d) >> 32);
mul4 = (q31_t) (((q63_t) b * c) >> 32);
mul1 = (mul1 >> 1);
mul2 = (mul2 >> 1);
mul3 = (mul3 >> 1);
mul4 = (mul4 >> 1);
out1 = mul1 - mul2;
out2 = mul3 + mul4;
/* store the real result in 3.29 format in the destination buffer. */
*pDst++ = out1;
/* store the imag result in 3.29 format in the destination buffer. */
*pDst++ = out2;
a = *pSrcA++;
b = *pSrcA++;
c = *pSrcB++;
d = *pSrcB++;
mul1 = (q31_t) (((q63_t) a * c) >> 32);
mul2 = (q31_t) (((q63_t) b * d) >> 32);
mul3 = (q31_t) (((q63_t) a * d) >> 32);
mul4 = (q31_t) (((q63_t) b * c) >> 32);
mul1 = (mul1 >> 1);
mul2 = (mul2 >> 1);
mul3 = (mul3 >> 1);
mul4 = (mul4 >> 1);
out1 = mul1 - mul2;
out2 = mul3 + mul4;
/* store the real result in 3.29 format in the destination buffer. */
*pDst++ = out1;
/* store the imag result in 3.29 format in the destination buffer. */
*pDst++ = out2;
a = *pSrcA++;
b = *pSrcA++;
c = *pSrcB++;
d = *pSrcB++;
mul1 = (q31_t) (((q63_t) a * c) >> 32);
mul2 = (q31_t) (((q63_t) b * d) >> 32);
mul3 = (q31_t) (((q63_t) a * d) >> 32);
mul4 = (q31_t) (((q63_t) b * c) >> 32);
mul1 = (mul1 >> 1);
mul2 = (mul2 >> 1);
mul3 = (mul3 >> 1);
mul4 = (mul4 >> 1);
out1 = mul1 - mul2;
out2 = mul3 + mul4;
/* store the real result in 3.29 format in the destination buffer. */
*pDst++ = out1;
/* store the imag result in 3.29 format in the destination buffer. */
*pDst++ = out2;
a = *pSrcA++;
b = *pSrcA++;
c = *pSrcB++;
d = *pSrcB++;
mul1 = (q31_t) (((q63_t) a * c) >> 32);
mul2 = (q31_t) (((q63_t) b * d) >> 32);
mul3 = (q31_t) (((q63_t) a * d) >> 32);
mul4 = (q31_t) (((q63_t) b * c) >> 32);
mul1 = (mul1 >> 1);
mul2 = (mul2 >> 1);
mul3 = (mul3 >> 1);
mul4 = (mul4 >> 1);
out1 = mul1 - mul2;
out2 = mul3 + mul4;
/* store the real result in 3.29 format in the destination buffer. */
*pDst++ = out1;
/* store the imag result in 3.29 format in the destination buffer. */
*pDst++ = out2;
/* Decrement the blockSize loop counter */
blkCnt--;
}
/* If the blockSize is not a multiple of 4, compute any remaining output samples here.
** No loop unrolling is used. */
blkCnt = numSamples % 0x4u;
while(blkCnt > 0u)
{
/* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */
/* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */
a = *pSrcA++;
b = *pSrcA++;
c = *pSrcB++;
d = *pSrcB++;
mul1 = (q31_t) (((q63_t) a * c) >> 32);
mul2 = (q31_t) (((q63_t) b * d) >> 32);
mul3 = (q31_t) (((q63_t) a * d) >> 32);
mul4 = (q31_t) (((q63_t) b * c) >> 32);
mul1 = (mul1 >> 1);
mul2 = (mul2 >> 1);
mul3 = (mul3 >> 1);
mul4 = (mul4 >> 1);
out1 = mul1 - mul2;
out2 = mul3 + mul4;
/* store the real result in 3.29 format in the destination buffer. */
*pDst++ = out1;
/* store the imag result in 3.29 format in the destination buffer. */
*pDst++ = out2;
/* Decrement the blockSize loop counter */
blkCnt--;
}
#else
/* Run the below code for Cortex-M0 */
/* loop Unrolling */
blkCnt = numSamples >> 1u;
/* First part of the processing with loop unrolling. Compute 2 outputs at a time.
** a second loop below computes the remaining 1 sample. */
while(blkCnt > 0u)
{
/* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */
/* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */
a = *pSrcA++;
b = *pSrcA++;
c = *pSrcB++;
d = *pSrcB++;
mul1 = (q31_t) (((q63_t) a * c) >> 32);
mul2 = (q31_t) (((q63_t) b * d) >> 32);
mul3 = (q31_t) (((q63_t) a * d) >> 32);
mul4 = (q31_t) (((q63_t) b * c) >> 32);
mul1 = (mul1 >> 1);
mul2 = (mul2 >> 1);
mul3 = (mul3 >> 1);
mul4 = (mul4 >> 1);
out1 = mul1 - mul2;
out2 = mul3 + mul4;
/* store the real result in 3.29 format in the destination buffer. */
*pDst++ = out1;
/* store the imag result in 3.29 format in the destination buffer. */
*pDst++ = out2;
a = *pSrcA++;
b = *pSrcA++;
c = *pSrcB++;
d = *pSrcB++;
mul1 = (q31_t) (((q63_t) a * c) >> 32);
mul2 = (q31_t) (((q63_t) b * d) >> 32);
mul3 = (q31_t) (((q63_t) a * d) >> 32);
mul4 = (q31_t) (((q63_t) b * c) >> 32);
mul1 = (mul1 >> 1);
mul2 = (mul2 >> 1);
mul3 = (mul3 >> 1);
mul4 = (mul4 >> 1);
out1 = mul1 - mul2;
out2 = mul3 + mul4;
/* store the real result in 3.29 format in the destination buffer. */
*pDst++ = out1;
/* store the imag result in 3.29 format in the destination buffer. */
*pDst++ = out2;
/* Decrement the blockSize loop counter */
blkCnt--;
}
/* If the blockSize is not a multiple of 2, compute any remaining output samples here.
** No loop unrolling is used. */
blkCnt = numSamples % 0x2u;
while(blkCnt > 0u)
{
/* C[2 * i] = A[2 * i] * B[2 * i] - A[2 * i + 1] * B[2 * i + 1]. */
/* C[2 * i + 1] = A[2 * i] * B[2 * i + 1] + A[2 * i + 1] * B[2 * i]. */
a = *pSrcA++;
b = *pSrcA++;
c = *pSrcB++;
d = *pSrcB++;
mul1 = (q31_t) (((q63_t) a * c) >> 32);
mul2 = (q31_t) (((q63_t) b * d) >> 32);
mul3 = (q31_t) (((q63_t) a * d) >> 32);
mul4 = (q31_t) (((q63_t) b * c) >> 32);
mul1 = (mul1 >> 1);
mul2 = (mul2 >> 1);
mul3 = (mul3 >> 1);
mul4 = (mul4 >> 1);
out1 = mul1 - mul2;
out2 = mul3 + mul4;
/* store the real result in 3.29 format in the destination buffer. */
*pDst++ = out1;
/* store the imag result in 3.29 format in the destination buffer. */
*pDst++ = out2;
/* Decrement the blockSize loop counter */
blkCnt--;
}
#endif /* #ifndef ARM_MATH_CM0_FAMILY */
}
/**
* @} end of CmplxByCmplxMult group
*/
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