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author | Ali Labbene <ali.labbene@st.com> | 2019-12-11 08:59:21 +0100 |
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committer | Ali Labbene <ali.labbene@st.com> | 2019-12-16 16:35:24 +0100 |
commit | 9f95ff5b6ba01db09552b84a0ab79607060a2666 (patch) | |
tree | 8a6e0dda832555c692307869aed49d07ee7facfe /DSP_Lib/Source/SupportFunctions/arm_q15_to_q7.c | |
parent | 76177aa280494bb36d7a0bcbda1078d4db717020 (diff) | |
download | st-cmsis-core-lowfat-9f95ff5b6ba01db09552b84a0ab79607060a2666.tar.gz st-cmsis-core-lowfat-9f95ff5b6ba01db09552b84a0ab79607060a2666.tar.bz2 st-cmsis-core-lowfat-9f95ff5b6ba01db09552b84a0ab79607060a2666.zip |
Official ARM version: v5.4.0
Add CMSIS V5.4.0, please refer to index.html available under \docs folder.
Note: content of \CMSIS\Core\Include has been copied under \Include to keep the same structure
used in existing projects, and thus avoid projects mass update
Note: the following components have been removed from ARM original delivery (as not used in ST packages)
- CMSIS_EW2018.pdf
- .gitattributes
- .gitignore
- \Device
- \CMSIS
- \CoreValidation
- \DAP
- \Documentation
- \DoxyGen
- \Driver
- \Pack
- \RTOS\CMSIS_RTOS_Tutorial.pdf
- \RTOS\RTX
- \RTOS\Template
- \RTOS2\RTX
- \Utilities
- All ARM/GCC projects files are deleted from \DSP, \RTOS and \RTOS2
Change-Id: Ia026c3f0f0d016627a4fb5a9032852c33d24b4d3
Diffstat (limited to 'DSP_Lib/Source/SupportFunctions/arm_q15_to_q7.c')
-rw-r--r-- | DSP_Lib/Source/SupportFunctions/arm_q15_to_q7.c | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/DSP_Lib/Source/SupportFunctions/arm_q15_to_q7.c b/DSP_Lib/Source/SupportFunctions/arm_q15_to_q7.c deleted file mode 100644 index 9b91c36..0000000 --- a/DSP_Lib/Source/SupportFunctions/arm_q15_to_q7.c +++ /dev/null @@ -1,154 +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_q15_to_q7.c -* -* Description: Converts the elements of the Q15 vector to Q7 vector. -* -* 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 groupSupport - */ - -/** - * @addtogroup q15_to_x - * @{ - */ - - -/** - * @brief Converts the elements of the Q15 vector to Q7 vector. - * @param[in] *pSrc points to the Q15 input vector - * @param[out] *pDst points to the Q7 output vector - * @param[in] blockSize length of the input vector - * @return none. - * - * \par Description: - * - * The equation used for the conversion process is: - * - * <pre> - * pDst[n] = (q7_t) pSrc[n] >> 8; 0 <= n < blockSize. - * </pre> - * - */ - - -void arm_q15_to_q7( - q15_t * pSrc, - q7_t * pDst, - uint32_t blockSize) -{ - q15_t *pIn = pSrc; /* Src pointer */ - uint32_t blkCnt; /* loop counter */ - -#ifndef ARM_MATH_CM0_FAMILY - - /* Run the below code for Cortex-M4 and Cortex-M3 */ - q31_t in1, in2; - q31_t out1, out2; - - /*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 = (q7_t) A >> 8 */ - /* convert from q15 to q7 and then store the results in the destination buffer */ - in1 = *__SIMD32(pIn)++; - in2 = *__SIMD32(pIn)++; - -#ifndef ARM_MATH_BIG_ENDIAN - - out1 = __PKHTB(in2, in1, 16); - out2 = __PKHBT(in2, in1, 16); - -#else - - out1 = __PKHTB(in1, in2, 16); - out2 = __PKHBT(in1, in2, 16); - -#endif // #ifndef ARM_MATH_BIG_ENDIAN - - /* rotate packed value by 24 */ - out2 = ((uint32_t) out2 << 8) | ((uint32_t) out2 >> 24); - - /* anding with 0xff00ff00 to get two 8 bit values */ - out1 = out1 & 0xFF00FF00; - /* anding with 0x00ff00ff to get two 8 bit values */ - out2 = out2 & 0x00FF00FF; - - /* oring two values(contains two 8 bit values) to get four packed 8 bit values */ - out1 = out1 | out2; - - /* store 4 samples at a time to destiantion buffer */ - *__SIMD32(pDst)++ = out1; - - /* 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 */ - - /* Loop over blockSize number of values */ - blkCnt = blockSize; - -#endif /* #ifndef ARM_MATH_CM0_FAMILY */ - - while(blkCnt > 0u) - { - /* C = (q7_t) A >> 8 */ - /* convert from q15 to q7 and then store the results in the destination buffer */ - *pDst++ = (q7_t) (*pIn++ >> 8); - - /* Decrement the loop counter */ - blkCnt--; - } - -} - -/** - * @} end of q15_to_x group - */ |