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Diffstat (limited to 'Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_scale_q15.c')
| -rw-r--r-- | Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_scale_q15.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_scale_q15.c b/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_scale_q15.c new file mode 100644 index 0000000..e43de0a --- /dev/null +++ b/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_scale_q15.c @@ -0,0 +1,249 @@ +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_mat_scale_q15.c + * Description: Multiplies a Q15 matrix by a scalar + * + * $Date: 23 April 2021 + * $Revision: V1.9.0 + * + * Target Processor: Cortex-M and Cortex-A cores + * -------------------------------------------------------------------- */ +/* + * Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved. + * + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the License); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an AS IS BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "dsp/matrix_functions.h" + +/** + @ingroup groupMatrix + */ + +/** + @addtogroup MatrixScale + @{ + */ + +/** + @brief Q15 matrix scaling. + @param[in] pSrc points to input matrix + @param[in] scaleFract fractional portion of the scale factor + @param[in] shift number of bits to shift the result by + @param[out] pDst points to output matrix structure + @return execution status + - \ref ARM_MATH_SUCCESS : Operation successful + - \ref ARM_MATH_SIZE_MISMATCH : Matrix size check failed + + @par Scaling and Overflow Behavior + The input data <code>*pSrc</code> and <code>scaleFract</code> are in 1.15 format. + These are multiplied to yield a 2.30 intermediate result and this is shifted with saturation to 1.15 format. + */ +#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE) +arm_status arm_mat_scale_q15( + const arm_matrix_instance_q15 * pSrc, + q15_t scaleFract, + int32_t shift, + arm_matrix_instance_q15 * pDst) +{ + arm_status status; /* Status of matrix scaling */ + q15_t *pIn = pSrc->pData; /* input data matrix pointer */ + q15_t *pOut = pDst->pData; /* output data matrix pointer */ + uint32_t numSamples; /* total number of elements in the matrix */ + uint32_t blkCnt; /* loop counters */ + q15x8_t vecIn, vecOut; + q15_t const *pInVec; + int32_t totShift = shift + 1; /* shift to apply after scaling */ + + pInVec = (q15_t const *) pIn; + + #ifdef ARM_MATH_MATRIX_CHECK + + /* Check for matrix mismatch condition */ + if ((pSrc->numRows != pDst->numRows) || + (pSrc->numCols != pDst->numCols) ) + { + /* Set status as ARM_MATH_SIZE_MISMATCH */ + status = ARM_MATH_SIZE_MISMATCH; + } + else + +#endif /* #ifdef ARM_MATH_MATRIX_CHECK */ + + { + /* + * Total number of samples in the input matrix + */ + numSamples = (uint32_t) pSrc->numRows * pSrc->numCols; + blkCnt = numSamples >> 3; + while (blkCnt > 0U) + { + /* + * C(m,n) = A(m,n) * scale + * Scaling and results are stored in the destination buffer. + */ + vecIn = vld1q(pInVec); pInVec += 8; + + /* multiply input with scaler value */ + vecOut = vmulhq(vecIn, vdupq_n_s16(scaleFract)); + /* apply shifting */ + vecOut = vqshlq_r(vecOut, totShift); + + vst1q(pOut, vecOut); pOut += 8; + + /* + * Decrement the blockSize loop counter + */ + blkCnt--; + } + /* + * tail + * (will be merged thru tail predication) + */ + blkCnt = numSamples & 7; + if (blkCnt > 0U) + { + mve_pred16_t p0 = vctp16q(blkCnt); + vecIn = vld1q(pInVec); pInVec += 8; + vecOut = vmulhq(vecIn, vdupq_n_s16(scaleFract)); + vecOut = vqshlq_r(vecOut, totShift); + vstrhq_p(pOut, vecOut, p0); + } + /* Set status as ARM_MATH_SUCCESS */ + status = ARM_MATH_SUCCESS; + } + + /* Return to application */ + return (status); +} + +#else +arm_status arm_mat_scale_q15( + const arm_matrix_instance_q15 * pSrc, + q15_t scaleFract, + int32_t shift, + arm_matrix_instance_q15 * pDst) +{ + q15_t *pIn = pSrc->pData; /* Input data matrix pointer */ + q15_t *pOut = pDst->pData; /* Output data matrix pointer */ + uint32_t numSamples; /* Total number of elements in the matrix */ + uint32_t blkCnt; /* Loop counter */ + arm_status status; /* Status of matrix scaling */ + int32_t kShift = 15 - shift; /* Total shift to apply after scaling */ + +#if defined (ARM_MATH_LOOPUNROLL) && defined (ARM_MATH_DSP) + q31_t inA1, inA2; + q31_t out1, out2, out3, out4; /* Temporary output variables */ + q15_t in1, in2, in3, in4; /* Temporary input variables */ +#endif + +#ifdef ARM_MATH_MATRIX_CHECK + + /* Check for matrix mismatch condition */ + if ((pSrc->numRows != pDst->numRows) || + (pSrc->numCols != pDst->numCols) ) + { + /* Set status as ARM_MATH_SIZE_MISMATCH */ + status = ARM_MATH_SIZE_MISMATCH; + } + else + +#endif /* #ifdef ARM_MATH_MATRIX_CHECK */ + + { + /* Total number of samples in input matrix */ + numSamples = (uint32_t) pSrc->numRows * pSrc->numCols; + +#if defined (ARM_MATH_LOOPUNROLL) + + /* Loop unrolling: Compute 4 outputs at a time */ + blkCnt = numSamples >> 2U; + + while (blkCnt > 0U) + { + /* C(m,n) = A(m,n) * k */ + +#if defined (ARM_MATH_DSP) + /* read 2 times 2 samples at a time from source */ + inA1 = read_q15x2_ia (&pIn); + inA2 = read_q15x2_ia (&pIn); + + /* Scale inputs and store result in temporary variables + * in single cycle by packing the outputs */ + out1 = (q31_t) ((q15_t) (inA1 >> 16) * scaleFract); + out2 = (q31_t) ((q15_t) (inA1 ) * scaleFract); + out3 = (q31_t) ((q15_t) (inA2 >> 16) * scaleFract); + out4 = (q31_t) ((q15_t) (inA2 ) * scaleFract); + + /* apply shifting */ + out1 = out1 >> kShift; + out2 = out2 >> kShift; + out3 = out3 >> kShift; + out4 = out4 >> kShift; + + /* saturate the output */ + in1 = (q15_t) (__SSAT(out1, 16)); + in2 = (q15_t) (__SSAT(out2, 16)); + in3 = (q15_t) (__SSAT(out3, 16)); + in4 = (q15_t) (__SSAT(out4, 16)); + + /* store result to destination */ + write_q15x2_ia (&pOut, __PKHBT(in2, in1, 16)); + write_q15x2_ia (&pOut, __PKHBT(in4, in3, 16)); + +#else + *pOut++ = (q15_t) (__SSAT(((q31_t) (*pIn++) * scaleFract) >> kShift, 16)); + *pOut++ = (q15_t) (__SSAT(((q31_t) (*pIn++) * scaleFract) >> kShift, 16)); + *pOut++ = (q15_t) (__SSAT(((q31_t) (*pIn++) * scaleFract) >> kShift, 16)); + *pOut++ = (q15_t) (__SSAT(((q31_t) (*pIn++) * scaleFract) >> kShift, 16)); +#endif + + /* Decrement loop counter */ + blkCnt--; + } + + /* Loop unrolling: Compute remaining outputs */ + blkCnt = numSamples % 0x4U; + +#else + + /* Initialize blkCnt with number of samples */ + blkCnt = numSamples; + +#endif /* #if defined (ARM_MATH_LOOPUNROLL) */ + + while (blkCnt > 0U) + { + /* C(m,n) = A(m,n) * k */ + + /* Scale, saturate and store result in destination buffer. */ + *pOut++ = (q15_t) (__SSAT(((q31_t) (*pIn++) * scaleFract) >> kShift, 16)); + + /* Decrement loop counter */ + blkCnt--; + } + + /* Set status as ARM_MATH_SUCCESS */ + status = ARM_MATH_SUCCESS; + } + + /* Return to application */ + return (status); +} +#endif /* defined(ARM_MATH_MVEI) */ + +/** + @} end of MatrixScale group + */ |