diff options
Diffstat (limited to 'Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_conj_q15.c')
| -rw-r--r-- | Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_conj_q15.c | 158 |
1 files changed, 83 insertions, 75 deletions
diff --git a/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_conj_q15.c b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_conj_q15.c index 79502297e..073a337c1 100644 --- a/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_conj_q15.c +++ b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_conj_q15.c @@ -3,13 +3,13 @@ * Title: arm_cmplx_conj_q15.c * Description: Q15 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 * @@ -29,68 +29,66 @@ #include "arm_math.h" /** - * @ingroup groupCmplxMath + @ingroup groupCmplxMath */ /** - * @addtogroup cmplx_conj - * @{ + @addtogroup cmplx_conj + @{ */ /** - * @brief Q15 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. - * - * <b>Scaling and Overflow Behavior:</b> - * \par - * The function uses saturating arithmetic. - * The Q15 value -1 (0x8000) will be saturated to the maximum allowable positive value 0x7FFF. + @brief Q15 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 Q15 value -1 (0x8000) is saturated to the maximum allowable positive value 0x7FFF. */ void arm_cmplx_conj_q15( - q15_t * pSrc, - q15_t * pDst, - uint32_t numSamples) + const q15_t * pSrc, + q15_t * pDst, + uint32_t numSamples) { + uint32_t blkCnt; /* Loop counter */ + q31_t in1; /* Temporary input variable */ -#if defined (ARM_MATH_DSP) +#if defined (ARM_MATH_LOOPUNROLL) && defined (ARM_MATH_DSP) + q31_t in2, in3, in4; /* Temporary input variables */ +#endif - /* Run the below code for Cortex-M4 and Cortex-M3 */ - uint32_t blkCnt; /* loop counter */ - q31_t in1, in2, in3, in4; - q31_t zero = 0; - /*loop Unrolling */ +#if defined (ARM_MATH_LOOPUNROLL) + + /* 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. */ - in1 = *__SIMD32(pSrc)++; - in2 = *__SIMD32(pSrc)++; - in3 = *__SIMD32(pSrc)++; - in4 = *__SIMD32(pSrc)++; + /* C[0] + jC[1] = A[0]+ j(-1)A[1] */ -#ifndef ARM_MATH_BIG_ENDIAN + /* Calculate Complex Conjugate and store result in destination buffer. */ - in1 = __QASX(zero, in1); - in2 = __QASX(zero, in2); - in3 = __QASX(zero, in3); - in4 = __QASX(zero, in4); + #if defined (ARM_MATH_DSP) + in1 = read_q15x2_ia ((q15_t **) &pSrc); + in2 = read_q15x2_ia ((q15_t **) &pSrc); + in3 = read_q15x2_ia ((q15_t **) &pSrc); + in4 = read_q15x2_ia ((q15_t **) &pSrc); +#ifndef ARM_MATH_BIG_ENDIAN + in1 = __QASX(0, in1); + in2 = __QASX(0, in2); + in3 = __QASX(0, in3); + in4 = __QASX(0, in4); #else - - in1 = __QSAX(zero, in1); - in2 = __QSAX(zero, in2); - in3 = __QSAX(zero, in3); - in4 = __QSAX(zero, in4); - + in1 = __QSAX(0, in1); + in2 = __QSAX(0, in2); + in3 = __QSAX(0, in3); + in4 = __QSAX(0, in4); #endif /* #ifndef ARM_MATH_BIG_ENDIAN */ in1 = ((uint32_t) in1 >> 16) | ((uint32_t) in1 << 16); @@ -98,52 +96,62 @@ void arm_cmplx_conj_q15( in3 = ((uint32_t) in3 >> 16) | ((uint32_t) in3 << 16); in4 = ((uint32_t) in4 >> 16) | ((uint32_t) in4 << 16); - *__SIMD32(pDst)++ = in1; - *__SIMD32(pDst)++ = in2; - *__SIMD32(pDst)++ = in3; - *__SIMD32(pDst)++ = in4; + write_q15x2_ia (&pDst, in1); + write_q15x2_ia (&pDst, in2); + write_q15x2_ia (&pDst, in3); + write_q15x2_ia (&pDst, in4); +#else + *pDst++ = *pSrc++; + in1 = *pSrc++; + *pDst++ = (in1 == (q15_t) 0x8000) ? (q15_t) 0x7fff : -in1; - /* Decrement the loop counter */ - blkCnt--; - } + *pDst++ = *pSrc++; + in1 = *pSrc++; + *pDst++ = (in1 == (q15_t) 0x8000) ? (q15_t) 0x7fff : -in1; - /* If the numSamples is not a multiple of 4, compute any remaining output samples here. - ** No loop unrolling is used. */ - blkCnt = numSamples % 0x4U; + *pDst++ = *pSrc++; + in1 = *pSrc++; + *pDst++ = (in1 == (q15_t) 0x8000) ? (q15_t) 0x7fff : -in1; - 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. */ - *pDst++ = *pSrc++; - *pDst++ = __SSAT(-*pSrc++, 16); + *pDst++ = *pSrc++; + in1 = *pSrc++; + *pDst++ = (in1 == (q15_t) 0x8000) ? (q15_t) 0x7fff : -in1; - /* Decrement the loop counter */ +#endif /* #if defined (ARM_MATH_DSP) */ + + /* Decrement loop counter */ blkCnt--; } + /* Loop unrolling: Compute remaining outputs */ + blkCnt = numSamples % 0x4U; + #else - q15_t in; + /* Initialize blkCnt with number of samples */ + blkCnt = numSamples; - /* Run the below code for Cortex-M0 */ +#endif /* #if defined (ARM_MATH_LOOPUNROLL) */ - while (numSamples > 0U) + while (blkCnt > 0U) { - /* realOut + j (imagOut) = realIn+ j (-1) imagIn */ - /* Calculate Complex Conjugate and then store the results in the destination buffer. */ - *pDst++ = *pSrc++; - in = *pSrc++; - *pDst++ = (in == (q15_t) 0x8000) ? 0x7fff : -in; - - /* Decrement the loop counter */ - numSamples--; - } + /* C[0] + jC[1] = A[0]+ j(-1)A[1] */ -#endif /* #if defined (ARM_MATH_DSP) */ + /* Calculate Complex Conjugate and store result in destination buffer. */ + *pDst++ = *pSrc++; + in1 = *pSrc++; +#if defined (ARM_MATH_DSP) + *pDst++ = __SSAT(-in1, 16); +#else + *pDst++ = (in1 == (q15_t) 0x8000) ? (q15_t) 0x7fff : -in1; +#endif + + /* Decrement loop counter */ + blkCnt--; + } } /** - * @} end of cmplx_conj group + @} end of cmplx_conj group */ |