diff options
author | Jun Wako <wakojun@gmail.com> | 2015-04-24 16:26:14 +0900 |
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committer | Jun Wako <wakojun@gmail.com> | 2015-04-24 16:26:14 +0900 |
commit | a3d96d3aa96318d339a67de1085e0ae495d57c84 (patch) | |
tree | db85c16d03b52399d6c109eda7ea0341a0de0b1d /tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/SupportFunctions/arm_q7_to_q31.c | |
parent | 1d5bac21dc6f1425b8ef4bbe7935330c37c3a93e (diff) | |
parent | 1fe4406f374291ab2e86e95a97341fd9c475fcb8 (diff) |
Merge commit '1fe4406f374291ab2e86e95a97341fd9c475fcb8'
Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/SupportFunctions/arm_q7_to_q31.c')
-rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/SupportFunctions/arm_q7_to_q31.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/SupportFunctions/arm_q7_to_q31.c b/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/SupportFunctions/arm_q7_to_q31.c new file mode 100644 index 0000000000..fefd78a017 --- /dev/null +++ b/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/SupportFunctions/arm_q7_to_q31.c @@ -0,0 +1,142 @@ +/* ---------------------------------------------------------------------------- +* Copyright (C) 2010-2013 ARM Limited. All rights reserved. +* +* $Date: 17. January 2013 +* $Revision: V1.4.1 +* +* Project: CMSIS DSP Library +* Title: arm_q7_to_q31.c +* +* Description: Converts the elements of the Q7 vector to Q31 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 q7_to_x + * @{ + */ + +/** + * @brief Converts the elements of the Q7 vector to Q31 vector. + * @param[in] *pSrc points to the Q7 input vector + * @param[out] *pDst points to the Q31 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] = (q31_t) pSrc[n] << 24; 0 <= n < blockSize. + * </pre> + * + */ + + +void arm_q7_to_q31( + q7_t * pSrc, + q31_t * pDst, + uint32_t blockSize) +{ + q7_t *pIn = pSrc; /* Src pointer */ + uint32_t blkCnt; /* loop counter */ + +#ifndef ARM_MATH_CM0_FAMILY + + q31_t in; + + /* Run the below code for Cortex-M4 and Cortex-M3 */ + + /*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 = (q31_t) A << 24 */ + /* convert from q7 to q31 and then store the results in the destination buffer */ + in = *__SIMD32(pIn)++; + +#ifndef ARM_MATH_BIG_ENDIAN + + *pDst++ = (__ROR(in, 8)) & 0xFF000000; + *pDst++ = (__ROR(in, 16)) & 0xFF000000; + *pDst++ = (__ROR(in, 24)) & 0xFF000000; + *pDst++ = (in & 0xFF000000); + +#else + + *pDst++ = (in & 0xFF000000); + *pDst++ = (__ROR(in, 24)) & 0xFF000000; + *pDst++ = (__ROR(in, 16)) & 0xFF000000; + *pDst++ = (__ROR(in, 8)) & 0xFF000000; + +#endif // #ifndef ARM_MATH_BIG_ENDIAN + + /* 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 = (q31_t) A << 24 */ + /* convert from q7 to q31 and then store the results in the destination buffer */ + *pDst++ = (q31_t) * pIn++ << 24; + + /* Decrement the loop counter */ + blkCnt--; + } + +} + +/** + * @} end of q7_to_x group + */ |