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Diffstat (limited to 'DSP_Lib/Source/BasicMathFunctions/arm_abs_q7.c')
| -rw-r--r-- | DSP_Lib/Source/BasicMathFunctions/arm_abs_q7.c | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/DSP_Lib/Source/BasicMathFunctions/arm_abs_q7.c b/DSP_Lib/Source/BasicMathFunctions/arm_abs_q7.c deleted file mode 100644 index 54c6f71..0000000 --- a/DSP_Lib/Source/BasicMathFunctions/arm_abs_q7.c +++ /dev/null @@ -1,157 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2014 ARM Limited. All rights reserved. -* -* $Date: 19. March 2015 -* $Revision: V.1.4.5 -* -* Project: CMSIS DSP Library -* Title: arm_abs_q7.c -* -* Description: Q7 vector absolute value. -* -* 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 groupMath - */ - -/** - * @addtogroup BasicAbs - * @{ - */ - -/** - * @brief Q7 vector absolute value. - * @param[in] *pSrc points to the input buffer - * @param[out] *pDst points to the output buffer - * @param[in] blockSize number of samples in each 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. - * The Q7 value -1 (0x80) will be saturated to the maximum allowable positive value 0x7F. - */ - -void arm_abs_q7( - q7_t * pSrc, - q7_t * pDst, - uint32_t blockSize) -{ - uint32_t blkCnt; /* loop counter */ - q7_t in; /* Input value1 */ - -#ifndef ARM_MATH_CM0_FAMILY - - /* Run the below code for Cortex-M4 and Cortex-M3 */ - q31_t in1, in2, in3, in4; /* temporary input variables */ - q31_t out1, out2, out3, out4; /* temporary output variables */ - - /*loop Unrolling */ - blkCnt = blockSize >> 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 = |A| */ - /* Read inputs */ - in1 = (q31_t) * pSrc; - in2 = (q31_t) * (pSrc + 1); - in3 = (q31_t) * (pSrc + 2); - - /* find absolute value */ - out1 = (in1 > 0) ? in1 : (q31_t)__QSUB8(0, in1); - - /* read input */ - in4 = (q31_t) * (pSrc + 3); - - /* find absolute value */ - out2 = (in2 > 0) ? in2 : (q31_t)__QSUB8(0, in2); - - /* store result to destination */ - *pDst = (q7_t) out1; - - /* find absolute value */ - out3 = (in3 > 0) ? in3 : (q31_t)__QSUB8(0, in3); - - /* find absolute value */ - out4 = (in4 > 0) ? in4 : (q31_t)__QSUB8(0, in4); - - /* store result to destination */ - *(pDst + 1) = (q7_t) out2; - - /* store result to destination */ - *(pDst + 2) = (q7_t) out3; - - /* store result to destination */ - *(pDst + 3) = (q7_t) out4; - - /* update pointers to process next samples */ - pSrc += 4u; - pDst += 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; -#else - - /* Run the below code for Cortex-M0 */ - blkCnt = blockSize; - -#endif /* #define ARM_MATH_CM0_FAMILY */ - - while(blkCnt > 0u) - { - /* C = |A| */ - /* Read the input */ - in = *pSrc++; - - /* Store the Absolute result in the destination buffer */ - *pDst++ = (in > 0) ? in : ((in == (q7_t) 0x80) ? 0x7f : -in); - - /* Decrement the loop counter */ - blkCnt--; - } -} - -/** - * @} end of BasicAbs group - */ |