From 96d6da4e252b06dcfdc041e7df23e86161c33007 Mon Sep 17 00:00:00 2001 From: rihab kouki Date: Tue, 28 Jul 2020 11:24:49 +0100 Subject: Official ARM version: v5.6.0 --- .../ComplexMathFunctions/arm_cmplx_conj_q31.c | 166 +++++++++------------ 1 file changed, 67 insertions(+), 99 deletions(-) (limited to 'DSP/Source/ComplexMathFunctions/arm_cmplx_conj_q31.c') diff --git a/DSP/Source/ComplexMathFunctions/arm_cmplx_conj_q31.c b/DSP/Source/ComplexMathFunctions/arm_cmplx_conj_q31.c index 709ce0e..6ef1ddb 100644 --- a/DSP/Source/ComplexMathFunctions/arm_cmplx_conj_q31.c +++ b/DSP/Source/ComplexMathFunctions/arm_cmplx_conj_q31.c @@ -3,13 +3,13 @@ * Title: arm_cmplx_conj_q31.c * Description: Q31 complex conjugate * - * $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 * @@ -29,141 +29,109 @@ #include "arm_math.h" /** - * @ingroup groupCmplxMath + @ingroup groupCmplxMath */ /** - * @addtogroup cmplx_conj - * @{ + @addtogroup cmplx_conj + @{ */ /** - * @brief Q31 complex conjugate. - * @param *pSrc points to the input vector - * @param *pDst points to the output vector - * @param numSamples number of complex samples in each vector - * @return none. - * - * Scaling and Overflow Behavior: - * \par - * The function uses saturating arithmetic. - * The Q31 value -1 (0x80000000) will be saturated to the maximum allowable positive value 0x7FFFFFFF. + @brief Q31 complex conjugate. + @param[in] pSrc points to the input vector + @param[out] pDst points to the output vector + @param[in] numSamples number of samples in each vector + @return none + + @par Scaling and Overflow Behavior + The function uses saturating arithmetic. + The Q31 value -1 (0x80000000) is saturated to the maximum allowable positive value 0x7FFFFFFF. */ void arm_cmplx_conj_q31( - q31_t * pSrc, - q31_t * pDst, - uint32_t numSamples) + const q31_t * pSrc, + q31_t * pDst, + uint32_t numSamples) { - uint32_t blkCnt; /* loop counter */ - q31_t in; /* Input value */ - -#if defined (ARM_MATH_DSP) + uint32_t blkCnt; /* Loop counter */ + q31_t in; /* Temporary input variable */ - /* Run the below code for Cortex-M4 and Cortex-M3 */ - q31_t inR1, inR2, inR3, inR4; /* Temporary real variables */ - q31_t inI1, inI2, inI3, inI4; /* Temporary imaginary variables */ +#if defined (ARM_MATH_LOOPUNROLL) - /*loop Unrolling */ + /* Loop unrolling: Compute 4 outputs at a time */ 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[0]+jC[1] = A[0]+ j (-1) A[1] */ - /* Calculate Complex Conjugate and then store the results in the destination buffer. */ - /* Saturated to 0x7fffffff if the input is -1(0x80000000) */ - /* read real input sample */ - inR1 = pSrc[0]; - /* store real input sample */ - pDst[0] = inR1; - - /* read imaginary input sample */ - inI1 = pSrc[1]; - - /* read real input sample */ - inR2 = pSrc[2]; - /* store real input sample */ - pDst[2] = inR2; - - /* read imaginary input sample */ - inI2 = pSrc[3]; - - /* negate imaginary input sample */ - inI1 = __QSUB(0, inI1); - - /* read real input sample */ - inR3 = pSrc[4]; - /* store real input sample */ - pDst[4] = inR3; - - /* read imaginary input sample */ - inI3 = pSrc[5]; + /* C[0] + jC[1] = A[0]+ j(-1)A[1] */ - /* negate imaginary input sample */ - inI2 = __QSUB(0, inI2); - - /* read real input sample */ - inR4 = pSrc[6]; - /* store real input sample */ - pDst[6] = inR4; - - /* negate imaginary input sample */ - inI3 = __QSUB(0, inI3); - - /* store imaginary input sample */ - inI4 = pSrc[7]; - - /* store imaginary input samples */ - pDst[1] = inI1; - - /* negate imaginary input sample */ - inI4 = __QSUB(0, inI4); - - /* store imaginary input samples */ - pDst[3] = inI2; + /* Calculate Complex Conjugate and store result in destination buffer. */ + *pDst++ = *pSrc++; + in = *pSrc++; +#if defined (ARM_MATH_DSP) + *pDst++ = __QSUB(0, in); +#else + *pDst++ = (in == INT32_MIN) ? INT32_MAX : -in; +#endif - /* increment source pointer by 8 to proecess next samples */ - pSrc += 8U; + *pDst++ = *pSrc++; + in = *pSrc++; +#if defined (ARM_MATH_DSP) + *pDst++ = __QSUB(0, in); +#else + *pDst++ = (in == INT32_MIN) ? INT32_MAX : -in; +#endif - /* store imaginary input samples */ - pDst[5] = inI3; - pDst[7] = inI4; + *pDst++ = *pSrc++; + in = *pSrc++; +#if defined (ARM_MATH_DSP) + *pDst++ = __QSUB(0, in); +#else + *pDst++ = (in == INT32_MIN) ? INT32_MAX : -in; +#endif - /* increment destination pointer by 8 to process next samples */ - pDst += 8U; + *pDst++ = *pSrc++; + in = *pSrc++; +#if defined (ARM_MATH_DSP) + *pDst++ = __QSUB(0, in); +#else + *pDst++ = (in == INT32_MIN) ? INT32_MAX : -in; +#endif - /* Decrement the loop counter */ + /* Decrement loop counter */ blkCnt--; } - /* If the numSamples is not a multiple of 4, compute any remaining output samples here. - ** No loop unrolling is used. */ + /* Loop unrolling: Compute remaining outputs */ blkCnt = numSamples % 0x4U; #else - /* Run the below code for Cortex-M0 */ + /* Initialize blkCnt with number of samples */ blkCnt = numSamples; - -#endif /* #if defined (ARM_MATH_DSP) */ +#endif /* #if defined (ARM_MATH_LOOPUNROLL) */ while (blkCnt > 0U) { - /* C[0]+jC[1] = A[0]+ j (-1) A[1] */ - /* Calculate Complex Conjugate and then store the results in the destination buffer. */ - /* Saturated to 0x7fffffff if the input is -1(0x80000000) */ - *pDst++ = *pSrc++; + /* C[0] + jC[1] = A[0]+ j(-1)A[1] */ + + /* Calculate Complex Conjugate and store result in destination buffer. */ + *pDst++ = *pSrc++; in = *pSrc++; +#if defined (ARM_MATH_DSP) + *pDst++ = __QSUB(0, in); +#else *pDst++ = (in == INT32_MIN) ? INT32_MAX : -in; +#endif - /* Decrement the loop counter */ + /* Decrement loop counter */ blkCnt--; } + } /** - * @} end of cmplx_conj group + @} end of cmplx_conj group */ -- cgit