diff options
Diffstat (limited to 'src/modules/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_correlate_opt_q15.c')
| -rw-r--r-- | src/modules/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_correlate_opt_q15.c | 512 |
1 files changed, 0 insertions, 512 deletions
diff --git a/src/modules/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_correlate_opt_q15.c b/src/modules/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_correlate_opt_q15.c deleted file mode 100644 index cc33b54f5..000000000 --- a/src/modules/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_correlate_opt_q15.c +++ /dev/null @@ -1,512 +0,0 @@ -/* ----------------------------------------------------------------------
-* Copyright (C) 2010 ARM Limited. All rights reserved.
-*
-* $Date: 15. February 2012
-* $Revision: V1.1.0
-*
-* Project: CMSIS DSP Library
-* Title: arm_correlate_opt_q15.c
-*
-* Description: Correlation of Q15 sequences.
-*
-* Target Processor: Cortex-M4/Cortex-M3
-*
-* Version 1.1.0 2012/02/15
-* Updated with more optimizations, bug fixes and minor API changes.
-*
-* Version 1.0.11 2011/10/18
-* Bug Fix in conv, correlation, partial convolution.
-*
-* Version 1.0.10 2011/7/15
-* Big Endian support added and Merged M0 and M3/M4 Source code.
-*
-* Version 1.0.3 2010/11/29
-* Re-organized the CMSIS folders and updated documentation.
-*
-* Version 1.0.2 2010/11/11
-* Documentation updated.
-*
-* Version 1.0.1 2010/10/05
-* Production release and review comments incorporated.
-*
-* Version 1.0.0 2010/09/20
-* Production release and review comments incorporated
-*
-* Version 0.0.7 2010/06/10
-* Misra-C changes done
-*
-* -------------------------------------------------------------------- */
-
-#include "arm_math.h"
-
-/**
- * @ingroup groupFilters
- */
-
-/**
- * @addtogroup Corr
- * @{
- */
-
-/**
- * @brief Correlation of Q15 sequences.
- * @param[in] *pSrcA points to the first input sequence.
- * @param[in] srcALen length of the first input sequence.
- * @param[in] *pSrcB points to the second input sequence.
- * @param[in] srcBLen length of the second input sequence.
- * @param[out] *pDst points to the location where the output result is written. Length 2 * max(srcALen, srcBLen) - 1.
- * @param[in] *pScratch points to scratch buffer of size max(srcALen, srcBLen) + 2*min(srcALen, srcBLen) - 2.
- * @return none.
- *
- * \par Restrictions
- * If the silicon does not support unaligned memory access enable the macro UNALIGNED_SUPPORT_DISABLE
- * In this case input, output, scratch buffers should be aligned by 32-bit
- *
- * @details
- * <b>Scaling and Overflow Behavior:</b>
- *
- * \par
- * The function is implemented using a 64-bit internal accumulator.
- * Both inputs are in 1.15 format and multiplications yield a 2.30 result.
- * The 2.30 intermediate results are accumulated in a 64-bit accumulator in 34.30 format.
- * This approach provides 33 guard bits and there is no risk of overflow.
- * The 34.30 result is then truncated to 34.15 format by discarding the low 15 bits and then saturated to 1.15 format.
- *
- * \par
- * Refer to <code>arm_correlate_fast_q15()</code> for a faster but less precise version of this function for Cortex-M3 and Cortex-M4.
- *
- *
- */
-
-
-void arm_correlate_opt_q15(
- q15_t * pSrcA,
- uint32_t srcALen,
- q15_t * pSrcB,
- uint32_t srcBLen,
- q15_t * pDst,
- q15_t * pScratch)
-{
- q15_t *pIn1; /* inputA pointer */
- q15_t *pIn2; /* inputB pointer */
- q63_t acc0, acc1, acc2, acc3; /* Accumulators */
- q15_t *py; /* Intermediate inputB pointer */
- q31_t x1, x2, x3; /* temporary variables for holding input1 and input2 values */
- uint32_t j, blkCnt, outBlockSize; /* loop counter */
- int32_t inc = 1; /* output pointer increment */
- uint32_t tapCnt;
- q31_t y1, y2;
- q15_t *pScr; /* Intermediate pointers */
- q15_t *pOut = pDst; /* output pointer */
-#ifdef UNALIGNED_SUPPORT_DISABLE
-
- q15_t a, b;
-
-#endif /* #ifndef UNALIGNED_SUPPORT_DISABLE */
-
- /* The algorithm implementation is based on the lengths of the inputs. */
- /* srcB is always made to slide across srcA. */
- /* So srcBLen is always considered as shorter or equal to srcALen */
- /* But CORR(x, y) is reverse of CORR(y, x) */
- /* So, when srcBLen > srcALen, output pointer is made to point to the end of the output buffer */
- /* and the destination pointer modifier, inc is set to -1 */
- /* If srcALen > srcBLen, zero pad has to be done to srcB to make the two inputs of same length */
- /* But to improve the performance,
- * we include zeroes in the output instead of zero padding either of the the inputs*/
- /* If srcALen > srcBLen,
- * (srcALen - srcBLen) zeroes has to included in the starting of the output buffer */
- /* If srcALen < srcBLen,
- * (srcALen - srcBLen) zeroes has to included in the ending of the output buffer */
- if(srcALen >= srcBLen)
- {
- /* Initialization of inputA pointer */
- pIn1 = (pSrcA);
-
- /* Initialization of inputB pointer */
- pIn2 = (pSrcB);
-
- /* Number of output samples is calculated */
- outBlockSize = (2u * srcALen) - 1u;
-
- /* When srcALen > srcBLen, zero padding is done to srcB
- * to make their lengths equal.
- * Instead, (outBlockSize - (srcALen + srcBLen - 1))
- * number of output samples are made zero */
- j = outBlockSize - (srcALen + (srcBLen - 1u));
-
- /* Updating the pointer position to non zero value */
- pOut += j;
-
- }
- else
- {
- /* Initialization of inputA pointer */
- pIn1 = (pSrcB);
-
- /* Initialization of inputB pointer */
- pIn2 = (pSrcA);
-
- /* srcBLen is always considered as shorter or equal to srcALen */
- j = srcBLen;
- srcBLen = srcALen;
- srcALen = j;
-
- /* CORR(x, y) = Reverse order(CORR(y, x)) */
- /* Hence set the destination pointer to point to the last output sample */
- pOut = pDst + ((srcALen + srcBLen) - 2u);
-
- /* Destination address modifier is set to -1 */
- inc = -1;
-
- }
-
- pScr = pScratch;
-
- /* Fill (srcBLen - 1u) zeros in scratch buffer */
- arm_fill_q15(0, pScr, (srcBLen - 1u));
-
- /* Update temporary scratch pointer */
- pScr += (srcBLen - 1u);
-
-#ifndef UNALIGNED_SUPPORT_DISABLE
-
- /* Copy (srcALen) samples in scratch buffer */
- arm_copy_q15(pIn1, pScr, srcALen);
-
- /* Update pointers */
- //pIn1 += srcALen;
- pScr += srcALen;
-
-#else
-
- /* Apply loop unrolling and do 4 Copies simultaneously. */
- j = srcALen >> 2u;
-
- /* First part of the processing with loop unrolling copies 4 data points at a time.
- ** a second loop below copies for the remaining 1 to 3 samples. */
- while(j > 0u)
- {
- /* copy second buffer in reversal manner */
- *pScr++ = *pIn1++;
- *pScr++ = *pIn1++;
- *pScr++ = *pIn1++;
- *pScr++ = *pIn1++;
-
- /* Decrement the loop counter */
- j--;
- }
-
- /* If the count is not a multiple of 4, copy remaining samples here.
- ** No loop unrolling is used. */
- j = srcALen % 0x4u;
-
- while(j > 0u)
- {
- /* copy second buffer in reversal manner for remaining samples */
- *pScr++ = *pIn1++;
-
- /* Decrement the loop counter */
- j--;
- }
-
-#endif /* #ifndef UNALIGNED_SUPPORT_DISABLE */
-
-#ifndef UNALIGNED_SUPPORT_DISABLE
-
- /* Fill (srcBLen - 1u) zeros at end of scratch buffer */
- arm_fill_q15(0, pScr, (srcBLen - 1u));
-
- /* Update pointer */
- pScr += (srcBLen - 1u);
-
-#else
-
-/* Apply loop unrolling and do 4 Copies simultaneously. */
- j = (srcBLen - 1u) >> 2u;
-
- /* First part of the processing with loop unrolling copies 4 data points at a time.
- ** a second loop below copies for the remaining 1 to 3 samples. */
- while(j > 0u)
- {
- /* copy second buffer in reversal manner */
- *pScr++ = 0;
- *pScr++ = 0;
- *pScr++ = 0;
- *pScr++ = 0;
-
- /* Decrement the loop counter */
- j--;
- }
-
- /* If the count is not a multiple of 4, copy remaining samples here.
- ** No loop unrolling is used. */
- j = (srcBLen - 1u) % 0x4u;
-
- while(j > 0u)
- {
- /* copy second buffer in reversal manner for remaining samples */
- *pScr++ = 0;
-
- /* Decrement the loop counter */
- j--;
- }
-
-#endif /* #ifndef UNALIGNED_SUPPORT_DISABLE */
-
- /* Temporary pointer for scratch2 */
- py = pIn2;
-
-
- /* Actual correlation process starts here */
- blkCnt = (srcALen + srcBLen - 1u) >> 2;
-
- while(blkCnt > 0)
- {
- /* Initialze temporary scratch pointer as scratch1 */
- pScr = pScratch;
-
- /* Clear Accumlators */
- acc0 = 0;
- acc1 = 0;
- acc2 = 0;
- acc3 = 0;
-
- /* Read four samples from scratch1 buffer */
- x1 = *__SIMD32(pScr)++;
-
- /* Read next four samples from scratch1 buffer */
- x2 = *__SIMD32(pScr)++;
-
- tapCnt = (srcBLen) >> 2u;
-
- while(tapCnt > 0u)
- {
-
-#ifndef UNALIGNED_SUPPORT_DISABLE
-
- /* Read four samples from smaller buffer */
- y1 = _SIMD32_OFFSET(pIn2);
- y2 = _SIMD32_OFFSET(pIn2 + 2u);
-
- acc0 = __SMLALD(x1, y1, acc0);
-
- acc2 = __SMLALD(x2, y1, acc2);
-
-#ifndef ARM_MATH_BIG_ENDIAN
- x3 = __PKHBT(x2, x1, 0);
-#else
- x3 = __PKHBT(x1, x2, 0);
-#endif
-
- acc1 = __SMLALDX(x3, y1, acc1);
-
- x1 = _SIMD32_OFFSET(pScr);
-
- acc0 = __SMLALD(x2, y2, acc0);
-
- acc2 = __SMLALD(x1, y2, acc2);
-
-#ifndef ARM_MATH_BIG_ENDIAN
- x3 = __PKHBT(x1, x2, 0);
-#else
- x3 = __PKHBT(x2, x1, 0);
-#endif
-
- acc3 = __SMLALDX(x3, y1, acc3);
-
- acc1 = __SMLALDX(x3, y2, acc1);
-
- x2 = _SIMD32_OFFSET(pScr + 2u);
-
-#ifndef ARM_MATH_BIG_ENDIAN
- x3 = __PKHBT(x2, x1, 0);
-#else
- x3 = __PKHBT(x1, x2, 0);
-#endif
-
- acc3 = __SMLALDX(x3, y2, acc3);
-
-#else
-
- /* Read four samples from smaller buffer */
- a = *pIn2;
- b = *(pIn2 + 1);
-
-#ifndef ARM_MATH_BIG_ENDIAN
- y1 = __PKHBT(a, b, 16);
-#else
- y1 = __PKHBT(b, a, 16);
-#endif
-
- a = *(pIn2 + 2);
- b = *(pIn2 + 3);
-#ifndef ARM_MATH_BIG_ENDIAN
- y2 = __PKHBT(a, b, 16);
-#else
- y2 = __PKHBT(b, a, 16);
-#endif
-
- acc0 = __SMLALD(x1, y1, acc0);
-
- acc2 = __SMLALD(x2, y1, acc2);
-
-#ifndef ARM_MATH_BIG_ENDIAN
- x3 = __PKHBT(x2, x1, 0);
-#else
- x3 = __PKHBT(x1, x2, 0);
-#endif
-
- acc1 = __SMLALDX(x3, y1, acc1);
-
- a = *pScr;
- b = *(pScr + 1);
-
-#ifndef ARM_MATH_BIG_ENDIAN
- x1 = __PKHBT(a, b, 16);
-#else
- x1 = __PKHBT(b, a, 16);
-#endif
-
- acc0 = __SMLALD(x2, y2, acc0);
-
- acc2 = __SMLALD(x1, y2, acc2);
-
-#ifndef ARM_MATH_BIG_ENDIAN
- x3 = __PKHBT(x1, x2, 0);
-#else
- x3 = __PKHBT(x2, x1, 0);
-#endif
-
- acc3 = __SMLALDX(x3, y1, acc3);
-
- acc1 = __SMLALDX(x3, y2, acc1);
-
- a = *(pScr + 2);
- b = *(pScr + 3);
-
-#ifndef ARM_MATH_BIG_ENDIAN
- x2 = __PKHBT(a, b, 16);
-#else
- x2 = __PKHBT(b, a, 16);
-#endif
-
-#ifndef ARM_MATH_BIG_ENDIAN
- x3 = __PKHBT(x2, x1, 0);
-#else
- x3 = __PKHBT(x1, x2, 0);
-#endif
-
- acc3 = __SMLALDX(x3, y2, acc3);
-
-#endif /* #ifndef UNALIGNED_SUPPORT_DISABLE */
-
- pIn2 += 4u;
-
- pScr += 4u;
-
-
- /* Decrement the loop counter */
- tapCnt--;
- }
-
-
-
- /* Update scratch pointer for remaining samples of smaller length sequence */
- pScr -= 4u;
-
-
- /* apply same above for remaining samples of smaller length sequence */
- tapCnt = (srcBLen) & 3u;
-
- while(tapCnt > 0u)
- {
-
- /* accumlate the results */
- acc0 += (*pScr++ * *pIn2);
- acc1 += (*pScr++ * *pIn2);
- acc2 += (*pScr++ * *pIn2);
- acc3 += (*pScr++ * *pIn2++);
-
- pScr -= 3u;
-
- /* Decrement the loop counter */
- tapCnt--;
- }
-
- blkCnt--;
-
-
- /* Store the results in the accumulators in the destination buffer. */
- *pOut = (__SSAT(acc0 >> 15u, 16));
- pOut += inc;
- *pOut = (__SSAT(acc1 >> 15u, 16));
- pOut += inc;
- *pOut = (__SSAT(acc2 >> 15u, 16));
- pOut += inc;
- *pOut = (__SSAT(acc3 >> 15u, 16));
- pOut += inc;
-
- /* Initialization of inputB pointer */
- pIn2 = py;
-
- pScratch += 4u;
-
- }
-
-
- blkCnt = (srcALen + srcBLen - 1u) & 0x3;
-
- /* Calculate correlation for remaining samples of Bigger length sequence */
- while(blkCnt > 0)
- {
- /* Initialze temporary scratch pointer as scratch1 */
- pScr = pScratch;
-
- /* Clear Accumlators */
- acc0 = 0;
-
- tapCnt = (srcBLen) >> 1u;
-
- while(tapCnt > 0u)
- {
-
- acc0 += (*pScr++ * *pIn2++);
- acc0 += (*pScr++ * *pIn2++);
-
- /* Decrement the loop counter */
- tapCnt--;
- }
-
- tapCnt = (srcBLen) & 1u;
-
- /* apply same above for remaining samples of smaller length sequence */
- while(tapCnt > 0u)
- {
-
- /* accumlate the results */
- acc0 += (*pScr++ * *pIn2++);
-
- /* Decrement the loop counter */
- tapCnt--;
- }
-
- blkCnt--;
-
- /* Store the result in the accumulator in the destination buffer. */
- *pOut = (q15_t) (__SSAT((acc0 >> 15), 16));
-
- pOut += inc;
-
- /* Initialization of inputB pointer */
- pIn2 = py;
-
- pScratch += 1u;
-
- }
-
-
-}
-
-/**
- * @} end of Corr group
- */
|