| /* ---------------------------------------------------------------------- |
| * Project: CMSIS DSP Library |
| * Title: arm_offset_f16.c |
| * Description: Floating-point vector offset |
| * |
| * $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/basic_math_functions_f16.h" |
| |
| /** |
| @ingroup groupMath |
| */ |
| |
| /** |
| @defgroup BasicOffset Vector Offset |
| |
| Adds a constant offset to each element of a vector. |
| |
| <pre> |
| pDst[n] = pSrc[n] + offset, 0 <= n < blockSize. |
| </pre> |
| |
| The functions support in-place computation allowing the source and |
| destination pointers to reference the same memory buffer. |
| There are separate functions for floating-point, Q7, Q15, and Q31 data types. |
| */ |
| |
| /** |
| @addtogroup BasicOffset |
| @{ |
| */ |
| |
| /** |
| @brief Adds a constant offset to a floating-point vector. |
| @param[in] pSrc points to the input vector |
| @param[in] offset is the offset to be added |
| @param[out] pDst points to the output vector |
| @param[in] blockSize number of samples in each vector |
| @return none |
| */ |
| |
| #if defined(ARM_MATH_MVE_FLOAT16) && !defined(ARM_MATH_AUTOVECTORIZE) |
| |
| #include "arm_helium_utils.h" |
| |
| void arm_offset_f16( |
| const float16_t * pSrc, |
| float16_t offset, |
| float16_t * pDst, |
| uint32_t blockSize) |
| { |
| uint32_t blkCnt; /* Loop counter */ |
| |
| f16x8_t vec1; |
| f16x8_t res; |
| |
| /* Compute 4 outputs at a time */ |
| blkCnt = blockSize >> 3U; |
| while (blkCnt > 0U) |
| { |
| /* C = A + offset */ |
| |
| /* Add offset and then store the results in the destination buffer. */ |
| vec1 = vld1q(pSrc); |
| res = vaddq(vec1,offset); |
| vst1q(pDst, res); |
| |
| /* Increment pointers */ |
| pSrc += 8; |
| pDst += 8; |
| |
| /* Decrement the loop counter */ |
| blkCnt--; |
| } |
| |
| /* Tail */ |
| blkCnt = blockSize & 0x7; |
| |
| if (blkCnt > 0U) |
| { |
| mve_pred16_t p0 = vctp16q(blkCnt); |
| vec1 = vld1q((float16_t const *) pSrc); |
| vstrhq_p(pDst, vaddq(vec1, offset), p0); |
| } |
| |
| |
| } |
| |
| #else |
| #if defined(ARM_FLOAT16_SUPPORTED) |
| void arm_offset_f16( |
| const float16_t * pSrc, |
| float16_t offset, |
| float16_t * pDst, |
| uint32_t blockSize) |
| { |
| uint32_t blkCnt; /* Loop counter */ |
| |
| |
| #if defined (ARM_MATH_LOOPUNROLL) && !defined(ARM_MATH_AUTOVECTORIZE) |
| |
| /* Loop unrolling: Compute 4 outputs at a time */ |
| blkCnt = blockSize >> 2U; |
| |
| while (blkCnt > 0U) |
| { |
| /* C = A + offset */ |
| |
| /* Add offset and store result in destination buffer. */ |
| *pDst++ = (_Float16)(*pSrc++) + (_Float16)offset; |
| |
| *pDst++ = (_Float16)(*pSrc++) + (_Float16)offset; |
| |
| *pDst++ = (_Float16)(*pSrc++) + (_Float16)offset; |
| |
| *pDst++ = (_Float16)(*pSrc++) + (_Float16)offset; |
| |
| /* Decrement loop counter */ |
| blkCnt--; |
| } |
| |
| /* Loop unrolling: Compute remaining outputs */ |
| blkCnt = blockSize % 0x4U; |
| |
| #else |
| |
| /* Initialize blkCnt with number of samples */ |
| blkCnt = blockSize; |
| |
| #endif /* #if defined (ARM_MATH_LOOPUNROLL) */ |
| |
| while (blkCnt > 0U) |
| { |
| /* C = A + offset */ |
| |
| /* Add offset and store result in destination buffer. */ |
| *pDst++ = (_Float16)(*pSrc++) + (_Float16)offset; |
| |
| /* Decrement loop counter */ |
| blkCnt--; |
| } |
| |
| } |
| #endif |
| #endif /* defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE) */ |
| |
| /** |
| @} end of BasicOffset group |
| */ |