diff options
Diffstat (limited to 'src/modules/mathlib/CMSIS/DSP_Lib/Source/BasicMathFunctions/arm_shift_q7.c')
| -rw-r--r-- | src/modules/mathlib/CMSIS/DSP_Lib/Source/BasicMathFunctions/arm_shift_q7.c | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/src/modules/mathlib/CMSIS/DSP_Lib/Source/BasicMathFunctions/arm_shift_q7.c b/src/modules/mathlib/CMSIS/DSP_Lib/Source/BasicMathFunctions/arm_shift_q7.c deleted file mode 100644 index 6dfd25f65..000000000 --- a/src/modules/mathlib/CMSIS/DSP_Lib/Source/BasicMathFunctions/arm_shift_q7.c +++ /dev/null @@ -1,215 +0,0 @@ -/* ----------------------------------------------------------------------
-* Copyright (C) 2010 ARM Limited. All rights reserved.
-*
-* $Date: 15. February 2012
-* $Revision: V1.1.0
-*
-* Project: CMSIS DSP Library
-* Title: arm_shift_q7.c
-*
-* Description: Processing function for the Q7 Shifting
-*
-* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
-*
-* Version 1.1.0 2012/02/15
-* Updated with more optimizations, bug fixes and minor API changes.
-*
-* 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 groupMath
- */
-
-/**
- * @addtogroup shift
- * @{
- */
-
-
-/**
- * @brief Shifts the elements of a Q7 vector a specified number of bits.
- * @param[in] *pSrc points to the input vector
- * @param[in] shiftBits number of bits to shift. A positive value shifts left; a negative value shifts right.
- * @param[out] *pDst points to the output vector
- * @param[in] blockSize number of samples in the vector
- * @return none.
- *
- * \par Conditions for optimum performance
- * Input and output buffers should be aligned by 32-bit
- *
- *
- * <b>Scaling and Overflow Behavior:</b>
- * \par
- * The function uses saturating arithmetic.
- * Results outside of the allowable Q7 range [0x8 0x7F] will be saturated.
- */
-
-void arm_shift_q7(
- q7_t * pSrc,
- int8_t shiftBits,
- q7_t * pDst,
- uint32_t blockSize)
-{
- uint32_t blkCnt; /* loop counter */
- uint8_t sign; /* Sign of shiftBits */
-
-#ifndef ARM_MATH_CM0
-
-/* Run the below code for Cortex-M4 and Cortex-M3 */
- q7_t in1; /* Input value1 */
- q7_t in2; /* Input value2 */
- q7_t in3; /* Input value3 */
- q7_t in4; /* Input value4 */
-
-
- /*loop Unrolling */
- blkCnt = blockSize >> 2u;
-
- /* Getting the sign of shiftBits */
- sign = (shiftBits & 0x80);
-
- /* If the shift value is positive then do right shift else left shift */
- if(sign == 0u)
- {
- /* 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 = A << shiftBits */
- /* Read 4 inputs */
- in1 = *pSrc;
- in2 = *(pSrc + 1);
- in3 = *(pSrc + 2);
- in4 = *(pSrc + 3);
-
- /* Store the Shifted result in the destination buffer in single cycle by packing the outputs */
- *__SIMD32(pDst)++ = __PACKq7(__SSAT((in1 << shiftBits), 8),
- __SSAT((in2 << shiftBits), 8),
- __SSAT((in3 << shiftBits), 8),
- __SSAT((in4 << shiftBits), 8));
- /* Update source pointer to process next sampels */
- pSrc += 4u;
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* If the blockSize is not a multiple of 4, compute any remaining output samples here.
- ** No loop unrolling is used. */
- blkCnt = blockSize % 0x4u;
-
- while(blkCnt > 0u)
- {
- /* C = A << shiftBits */
- /* Shift the input and then store the result in the destination buffer. */
- *pDst++ = (q7_t) __SSAT((*pSrc++ << shiftBits), 8);
-
- /* Decrement the loop counter */
- blkCnt--;
- }
- }
- else
- {
- shiftBits = -shiftBits;
- /* 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 = A >> shiftBits */
- /* Read 4 inputs */
- in1 = *pSrc;
- in2 = *(pSrc + 1);
- in3 = *(pSrc + 2);
- in4 = *(pSrc + 3);
-
- /* Store the Shifted result in the destination buffer in single cycle by packing the outputs */
- *__SIMD32(pDst)++ = __PACKq7((in1 >> shiftBits), (in2 >> shiftBits),
- (in3 >> shiftBits), (in4 >> shiftBits));
-
-
- pSrc += 4u;
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-
- /* If the blockSize is not a multiple of 4, compute any remaining output samples here.
- ** No loop unrolling is used. */
- blkCnt = blockSize % 0x4u;
-
- while(blkCnt > 0u)
- {
- /* C = A >> shiftBits */
- /* Shift the input and then store the result in the destination buffer. */
- in1 = *pSrc++;
- *pDst++ = (in1 >> shiftBits);
-
- /* Decrement the loop counter */
- blkCnt--;
- }
- }
-
-#else
-
- /* Run the below code for Cortex-M0 */
-
- /* Getting the sign of shiftBits */
- sign = (shiftBits & 0x80);
-
- /* If the shift value is positive then do right shift else left shift */
- if(sign == 0u)
- {
- /* Initialize blkCnt with number of samples */
- blkCnt = blockSize;
-
- while(blkCnt > 0u)
- {
- /* C = A << shiftBits */
- /* Shift the input and then store the result in the destination buffer. */
- *pDst++ = (q7_t) __SSAT(((q15_t) * pSrc++ << shiftBits), 8);
-
- /* Decrement the loop counter */
- blkCnt--;
- }
- }
- else
- {
- /* Initialize blkCnt with number of samples */
- blkCnt = blockSize;
-
- while(blkCnt > 0u)
- {
- /* C = A >> shiftBits */
- /* Shift the input and then store the result in the destination buffer. */
- *pDst++ = (*pSrc++ >> -shiftBits);
-
- /* Decrement the loop counter */
- blkCnt--;
- }
- }
-
-#endif /* #ifndef ARM_MATH_CM0 */
-}
-
-/**
- * @} end of shift group
- */
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