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754 lines
21 KiB
C
754 lines
21 KiB
C
/* ----------------------------------------------------------------------
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* Project: CMSIS DSP Library
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* Title: arm_helium_utils.h
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* Description: Utility functions for Helium development
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*
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* @version V1.10.0
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* @date 08 July 2021
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*
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* Target Processor: Cortex-M and Cortex-A cores
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* -------------------------------------------------------------------- */
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/*
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* Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an AS IS BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _ARM_UTILS_HELIUM_H_
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#define _ARM_UTILS_HELIUM_H_
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/***************************************
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Definitions available for MVEF and MVEI
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***************************************/
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#if (defined (ARM_MATH_HELIUM) || defined(ARM_MATH_MVEF) || defined(ARM_MATH_MVEI)) && !defined(ARM_MATH_AUTOVECTORIZE)
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#define INACTIVELANE 0 /* inactive lane content */
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#endif /* defined (ARM_MATH_HELIUM) || defined(ARM_MATH_MVEF) || defined(ARM_MATH_MVEI) */
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/***************************************
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Definitions available for MVEF only
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***************************************/
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#if (defined (ARM_MATH_HELIUM) || defined(ARM_MATH_MVEF)) && !defined(ARM_MATH_AUTOVECTORIZE)
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__STATIC_FORCEINLINE float32_t vecAddAcrossF32Mve(float32x4_t in)
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{
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float32_t acc;
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acc = vgetq_lane(in, 0) + vgetq_lane(in, 1) +
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vgetq_lane(in, 2) + vgetq_lane(in, 3);
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return acc;
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}
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/* newton initial guess */
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#define INVSQRT_MAGIC_F32 0x5f3759df
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#define INV_NEWTON_INIT_F32 0x7EF127EA
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#define INVSQRT_NEWTON_MVE_F32(invSqrt, xHalf, xStart)\
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{ \
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float32x4_t tmp; \
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\
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/* tmp = xhalf * x * x */ \
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tmp = vmulq(xStart, xStart); \
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tmp = vmulq(tmp, xHalf); \
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/* (1.5f - xhalf * x * x) */ \
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tmp = vsubq(vdupq_n_f32(1.5f), tmp); \
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/* x = x*(1.5f-xhalf*x*x); */ \
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invSqrt = vmulq(tmp, xStart); \
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}
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#endif /* defined (ARM_MATH_HELIUM) || defined(ARM_MATH_MVEF) */
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/***************************************
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Definitions available for f16 datatype with HW acceleration only
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***************************************/
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#if defined(ARM_FLOAT16_SUPPORTED)
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#if defined (ARM_MATH_MVE_FLOAT16) && !defined(ARM_MATH_AUTOVECTORIZE)
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__STATIC_FORCEINLINE float16_t vecAddAcrossF16Mve(float16x8_t in)
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{
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float16x8_t tmpVec;
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_Float16 acc;
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tmpVec = (float16x8_t) vrev32q_s16((int16x8_t) in);
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in = vaddq_f16(tmpVec, in);
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tmpVec = (float16x8_t) vrev64q_s32((int32x4_t) in);
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in = vaddq_f16(tmpVec, in);
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acc = (_Float16)vgetq_lane_f16(in, 0) + (_Float16)vgetq_lane_f16(in, 4);
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return acc;
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}
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__STATIC_FORCEINLINE float16x8_t __mve_cmplx_sum_intra_vec_f16(
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float16x8_t vecIn)
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{
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float16x8_t vecTmp, vecOut;
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uint32_t tmp;
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vecTmp = (float16x8_t) vrev64q_s32((int32x4_t) vecIn);
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// TO TRACK : using canonical addition leads to unefficient code generation for f16
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// vecTmp = vecTmp + vecAccCpx0;
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/*
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* Compute
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* re0+re1 | im0+im1 | re0+re1 | im0+im1
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* re2+re3 | im2+im3 | re2+re3 | im2+im3
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*/
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vecTmp = vaddq_f16(vecTmp, vecIn);
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vecOut = vecTmp;
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/*
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* shift left, random tmp insertion in bottom
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*/
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vecOut = vreinterpretq_f16_s32(vshlcq_s32(vreinterpretq_s32_f16(vecOut) , &tmp, 32));
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/*
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* Compute:
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* DONTCARE | DONTCARE | re0+re1+re0+re1 |im0+im1+im0+im1
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* re0+re1+re2+re3 | im0+im1+im2+im3 | re2+re3+re2+re3 |im2+im3+im2+im3
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*/
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vecOut = vaddq_f16(vecOut, vecTmp);
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/*
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* Cmplx sum is in 4rd & 5th f16 elt
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* return full vector
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*/
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return vecOut;
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}
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#define mve_cmplx_sum_intra_r_i_f16(vec, Re, Im) \
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{ \
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float16x8_t vecOut = __mve_cmplx_sum_intra_vec_f16(vec); \
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Re = vgetq_lane(vecOut, 4); \
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Im = vgetq_lane(vecOut, 5); \
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}
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__STATIC_FORCEINLINE void mve_cmplx_sum_intra_vec_f16(
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float16x8_t vecIn,
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float16_t *pOut)
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{
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float16x8_t vecOut = __mve_cmplx_sum_intra_vec_f16(vecIn);
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/*
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* Cmplx sum is in 4rd & 5th f16 elt
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* use 32-bit extraction
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*/
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*(float32_t *) pOut = ((float32x4_t) vecOut)[2];
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}
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#define INVSQRT_MAGIC_F16 0x59ba /* ( 0x1ba = 0x3759df >> 13) */
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/* canonical version of INVSQRT_NEWTON_MVE_F16 leads to bad performance */
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#define INVSQRT_NEWTON_MVE_F16(invSqrt, xHalf, xStart) \
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{ \
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float16x8_t tmp; \
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\
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/* tmp = xhalf * x * x */ \
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tmp = vmulq(xStart, xStart); \
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tmp = vmulq(tmp, xHalf); \
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/* (1.5f - xhalf * x * x) */ \
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tmp = vsubq(vdupq_n_f16((float16_t)1.5), tmp); \
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/* x = x*(1.5f-xhalf*x*x); */ \
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invSqrt = vmulq(tmp, xStart); \
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}
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#endif
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#endif
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/***************************************
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Definitions available for MVEI and MVEF only
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***************************************/
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#if (defined (ARM_MATH_HELIUM) || defined(ARM_MATH_MVEF) || defined(ARM_MATH_MVEI)) && !defined(ARM_MATH_AUTOVECTORIZE)
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/* Following functions are used to transpose matrix in f32 and q31 cases */
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__STATIC_INLINE arm_status arm_mat_trans_32bit_2x2_mve(
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uint32_t * pDataSrc,
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uint32_t * pDataDest)
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{
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static const uint32x4_t vecOffs = { 0, 2, 1, 3 };
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/*
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*
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* | 0 1 | => | 0 2 |
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* | 2 3 | | 1 3 |
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*
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*/
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uint32x4_t vecIn = vldrwq_u32((uint32_t const *)pDataSrc);
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vstrwq_scatter_shifted_offset_u32(pDataDest, vecOffs, vecIn);
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return (ARM_MATH_SUCCESS);
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}
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__STATIC_INLINE arm_status arm_mat_trans_32bit_3x3_mve(
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uint32_t * pDataSrc,
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uint32_t * pDataDest)
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{
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const uint32x4_t vecOffs1 = { 0, 3, 6, 1};
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const uint32x4_t vecOffs2 = { 4, 7, 2, 5};
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/*
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*
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* | 0 1 2 | | 0 3 6 | 4 x 32 flattened version | 0 3 6 1 |
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* | 3 4 5 | => | 1 4 7 | => | 4 7 2 5 |
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* | 6 7 8 | | 2 5 8 | (row major) | 8 . . . |
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*
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*/
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uint32x4_t vecIn1 = vldrwq_u32((uint32_t const *) pDataSrc);
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uint32x4_t vecIn2 = vldrwq_u32((uint32_t const *) &pDataSrc[4]);
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vstrwq_scatter_shifted_offset_u32(pDataDest, vecOffs1, vecIn1);
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vstrwq_scatter_shifted_offset_u32(pDataDest, vecOffs2, vecIn2);
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pDataDest[8] = pDataSrc[8];
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return (ARM_MATH_SUCCESS);
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}
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__STATIC_INLINE arm_status arm_mat_trans_32bit_4x4_mve(uint32_t * pDataSrc, uint32_t * pDataDest)
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{
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/*
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* 4x4 Matrix transposition
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* is 4 x de-interleave operation
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*
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* 0 1 2 3 0 4 8 12
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* 4 5 6 7 1 5 9 13
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* 8 9 10 11 2 6 10 14
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* 12 13 14 15 3 7 11 15
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*/
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uint32x4x4_t vecIn;
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vecIn = vld4q((uint32_t const *) pDataSrc);
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vstrwq(pDataDest, vecIn.val[0]);
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pDataDest += 4;
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vstrwq(pDataDest, vecIn.val[1]);
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pDataDest += 4;
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vstrwq(pDataDest, vecIn.val[2]);
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pDataDest += 4;
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vstrwq(pDataDest, vecIn.val[3]);
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return (ARM_MATH_SUCCESS);
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}
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__STATIC_INLINE arm_status arm_mat_trans_32bit_generic_mve(
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uint16_t srcRows,
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uint16_t srcCols,
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uint32_t * pDataSrc,
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uint32_t * pDataDest)
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{
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uint32x4_t vecOffs;
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uint32_t i;
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uint32_t blkCnt;
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uint32_t const *pDataC;
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uint32_t *pDataDestR;
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uint32x4_t vecIn;
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vecOffs = vidupq_u32((uint32_t)0, 1);
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vecOffs = vecOffs * srcCols;
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i = srcCols;
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do
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{
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pDataC = (uint32_t const *) pDataSrc;
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pDataDestR = pDataDest;
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blkCnt = srcRows >> 2;
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while (blkCnt > 0U)
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{
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vecIn = vldrwq_gather_shifted_offset_u32(pDataC, vecOffs);
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vstrwq(pDataDestR, vecIn);
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pDataDestR += 4;
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pDataC = pDataC + srcCols * 4;
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/*
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* Decrement the blockSize loop counter
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*/
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blkCnt--;
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}
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/*
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* tail
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*/
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blkCnt = srcRows & 3;
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if (blkCnt > 0U)
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{
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mve_pred16_t p0 = vctp32q(blkCnt);
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vecIn = vldrwq_gather_shifted_offset_u32(pDataC, vecOffs);
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vstrwq_p(pDataDestR, vecIn, p0);
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}
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pDataSrc += 1;
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pDataDest += srcRows;
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}
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while (--i);
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return (ARM_MATH_SUCCESS);
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}
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__STATIC_INLINE arm_status arm_mat_cmplx_trans_32bit(
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uint16_t srcRows,
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uint16_t srcCols,
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uint32_t *pDataSrc,
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uint16_t dstRows,
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uint16_t dstCols,
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uint32_t *pDataDest)
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{
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uint32_t i;
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uint32_t const *pDataC;
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uint32_t *pDataRow;
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uint32_t *pDataDestR, *pDataDestRow;
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uint32x4_t vecOffsRef, vecOffsCur;
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uint32_t blkCnt;
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uint32x4_t vecIn;
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#ifdef ARM_MATH_MATRIX_CHECK
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/*
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* Check for matrix mismatch condition
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*/
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if ((srcRows != dstCols) || (srcCols != dstRows))
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{
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/*
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* Set status as ARM_MATH_SIZE_MISMATCH
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*/
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return ARM_MATH_SIZE_MISMATCH;
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}
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#else
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(void)dstRows;
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(void)dstCols;
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#endif
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/* 2x2, 3x3 and 4x4 specialization to be added */
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vecOffsRef[0] = 0;
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vecOffsRef[1] = 1;
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vecOffsRef[2] = srcCols << 1;
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vecOffsRef[3] = (srcCols << 1) + 1;
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pDataRow = pDataSrc;
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pDataDestRow = pDataDest;
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i = srcCols;
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do
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{
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pDataC = (uint32_t const *) pDataRow;
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pDataDestR = pDataDestRow;
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vecOffsCur = vecOffsRef;
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blkCnt = (srcRows * CMPLX_DIM) >> 2;
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while (blkCnt > 0U)
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{
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vecIn = vldrwq_gather_shifted_offset(pDataC, vecOffsCur);
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vstrwq(pDataDestR, vecIn);
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pDataDestR += 4;
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vecOffsCur = vaddq(vecOffsCur, (srcCols << 2));
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/*
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* Decrement the blockSize loop counter
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*/
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blkCnt--;
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}
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/*
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* tail
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* (will be merged thru tail predication)
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*/
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blkCnt = (srcRows * CMPLX_DIM) & 3;
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if (blkCnt > 0U)
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{
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mve_pred16_t p0 = vctp32q(blkCnt);
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vecIn = vldrwq_gather_shifted_offset(pDataC, vecOffsCur);
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vstrwq_p(pDataDestR, vecIn, p0);
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}
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pDataRow += CMPLX_DIM;
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pDataDestRow += (srcRows * CMPLX_DIM);
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}
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while (--i);
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return (ARM_MATH_SUCCESS);
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}
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__STATIC_INLINE arm_status arm_mat_trans_16bit_2x2(uint16_t * pDataSrc, uint16_t * pDataDest)
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{
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pDataDest[0] = pDataSrc[0];
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pDataDest[3] = pDataSrc[3];
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pDataDest[2] = pDataSrc[1];
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pDataDest[1] = pDataSrc[2];
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return (ARM_MATH_SUCCESS);
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}
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__STATIC_INLINE arm_status arm_mat_trans_16bit_3x3_mve(uint16_t * pDataSrc, uint16_t * pDataDest)
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{
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static const uint16_t stridesTr33[8] = { 0, 3, 6, 1, 4, 7, 2, 5 };
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uint16x8_t vecOffs1;
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uint16x8_t vecIn1;
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/*
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*
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* | 0 1 2 | | 0 3 6 | 8 x 16 flattened version | 0 3 6 1 4 7 2 5 |
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* | 3 4 5 | => | 1 4 7 | => | 8 . . . . . . . |
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* | 6 7 8 | | 2 5 8 | (row major)
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*
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*/
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vecOffs1 = vldrhq_u16((uint16_t const *) stridesTr33);
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vecIn1 = vldrhq_u16((uint16_t const *) pDataSrc);
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vstrhq_scatter_shifted_offset_u16(pDataDest, vecOffs1, vecIn1);
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pDataDest[8] = pDataSrc[8];
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return (ARM_MATH_SUCCESS);
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}
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__STATIC_INLINE arm_status arm_mat_trans_16bit_4x4_mve(uint16_t * pDataSrc, uint16_t * pDataDest)
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{
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static const uint16_t stridesTr44_1[8] = { 0, 4, 8, 12, 1, 5, 9, 13 };
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static const uint16_t stridesTr44_2[8] = { 2, 6, 10, 14, 3, 7, 11, 15 };
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uint16x8_t vecOffs1, vecOffs2;
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uint16x8_t vecIn1, vecIn2;
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uint16_t const * pDataSrcVec = (uint16_t const *) pDataSrc;
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/*
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* 4x4 Matrix transposition
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*
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* | 0 1 2 3 | | 0 4 8 12 | 8 x 16 flattened version
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* | 4 5 6 7 | => | 1 5 9 13 | => [0 4 8 12 1 5 9 13]
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* | 8 9 10 11 | | 2 6 10 14 | [2 6 10 14 3 7 11 15]
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* | 12 13 14 15 | | 3 7 11 15 |
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*/
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vecOffs1 = vldrhq_u16((uint16_t const *) stridesTr44_1);
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vecOffs2 = vldrhq_u16((uint16_t const *) stridesTr44_2);
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vecIn1 = vldrhq_u16(pDataSrcVec);
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pDataSrcVec += 8;
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vecIn2 = vldrhq_u16(pDataSrcVec);
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vstrhq_scatter_shifted_offset_u16(pDataDest, vecOffs1, vecIn1);
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vstrhq_scatter_shifted_offset_u16(pDataDest, vecOffs2, vecIn2);
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return (ARM_MATH_SUCCESS);
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}
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__STATIC_INLINE arm_status arm_mat_trans_16bit_generic(
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uint16_t srcRows,
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uint16_t srcCols,
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uint16_t * pDataSrc,
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uint16_t * pDataDest)
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{
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uint16x8_t vecOffs;
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uint32_t i;
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uint32_t blkCnt;
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uint16_t const *pDataC;
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uint16_t *pDataDestR;
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uint16x8_t vecIn;
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vecOffs = vidupq_u16((uint32_t)0, 1);
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vecOffs = vecOffs * srcCols;
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i = srcCols;
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while(i > 0U)
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{
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pDataC = (uint16_t const *) pDataSrc;
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pDataDestR = pDataDest;
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blkCnt = srcRows >> 3;
|
|
while (blkCnt > 0U)
|
|
{
|
|
vecIn = vldrhq_gather_shifted_offset_u16(pDataC, vecOffs);
|
|
vstrhq_u16(pDataDestR, vecIn);
|
|
pDataDestR += 8;
|
|
pDataC = pDataC + srcCols * 8;
|
|
/*
|
|
* Decrement the blockSize loop counter
|
|
*/
|
|
blkCnt--;
|
|
}
|
|
|
|
/*
|
|
* tail
|
|
*/
|
|
blkCnt = srcRows & 7;
|
|
if (blkCnt > 0U)
|
|
{
|
|
mve_pred16_t p0 = vctp16q(blkCnt);
|
|
vecIn = vldrhq_gather_shifted_offset_u16(pDataC, vecOffs);
|
|
vstrhq_p_u16(pDataDestR, vecIn, p0);
|
|
}
|
|
pDataSrc += 1;
|
|
pDataDest += srcRows;
|
|
i--;
|
|
}
|
|
|
|
return (ARM_MATH_SUCCESS);
|
|
}
|
|
|
|
|
|
__STATIC_INLINE arm_status arm_mat_cmplx_trans_16bit(
|
|
uint16_t srcRows,
|
|
uint16_t srcCols,
|
|
uint16_t *pDataSrc,
|
|
uint16_t dstRows,
|
|
uint16_t dstCols,
|
|
uint16_t *pDataDest)
|
|
{
|
|
static const uint16_t loadCmplxCol[8] = { 0, 0, 1, 1, 2, 2, 3, 3 };
|
|
int i;
|
|
uint16x8_t vecOffsRef, vecOffsCur;
|
|
uint16_t const *pDataC;
|
|
uint16_t *pDataRow;
|
|
uint16_t *pDataDestR, *pDataDestRow;
|
|
uint32_t blkCnt;
|
|
uint16x8_t vecIn;
|
|
|
|
#ifdef ARM_MATH_MATRIX_CHECK
|
|
/*
|
|
* Check for matrix mismatch condition
|
|
*/
|
|
if ((srcRows != dstCols) || (srcCols != dstRows))
|
|
{
|
|
/*
|
|
* Set status as ARM_MATH_SIZE_MISMATCH
|
|
*/
|
|
return ARM_MATH_SIZE_MISMATCH;
|
|
}
|
|
#else
|
|
(void)dstRows;
|
|
(void)dstCols;
|
|
#endif
|
|
|
|
/*
|
|
* 2x2, 3x3 and 4x4 specialization to be added
|
|
*/
|
|
|
|
|
|
/*
|
|
* build [0, 1, 2xcol, 2xcol+1, 4xcol, 4xcol+1, 6xcol, 6xcol+1]
|
|
*/
|
|
vecOffsRef = vldrhq_u16((uint16_t const *) loadCmplxCol);
|
|
vecOffsRef = vmulq(vecOffsRef, (uint16_t) (srcCols * CMPLX_DIM))
|
|
+ viwdupq_u16((uint32_t)0, (uint16_t) 2, 1);
|
|
|
|
pDataRow = pDataSrc;
|
|
pDataDestRow = pDataDest;
|
|
i = srcCols;
|
|
do
|
|
{
|
|
pDataC = (uint16_t const *) pDataRow;
|
|
pDataDestR = pDataDestRow;
|
|
vecOffsCur = vecOffsRef;
|
|
|
|
blkCnt = (srcRows * CMPLX_DIM) >> 3;
|
|
while (blkCnt > 0U)
|
|
{
|
|
vecIn = vldrhq_gather_shifted_offset(pDataC, vecOffsCur);
|
|
vstrhq(pDataDestR, vecIn);
|
|
pDataDestR+= 8; // VEC_LANES_U16
|
|
vecOffsCur = vaddq(vecOffsCur, (srcCols << 3));
|
|
/*
|
|
* Decrement the blockSize loop counter
|
|
*/
|
|
blkCnt--;
|
|
}
|
|
/*
|
|
* tail
|
|
* (will be merged thru tail predication)
|
|
*/
|
|
blkCnt = (srcRows * CMPLX_DIM) & 0x7;
|
|
if (blkCnt > 0U)
|
|
{
|
|
mve_pred16_t p0 = vctp16q(blkCnt);
|
|
vecIn = vldrhq_gather_shifted_offset(pDataC, vecOffsCur);
|
|
vstrhq_p(pDataDestR, vecIn, p0);
|
|
}
|
|
|
|
pDataRow += CMPLX_DIM;
|
|
pDataDestRow += (srcRows * CMPLX_DIM);
|
|
}
|
|
while (--i);
|
|
|
|
return (ARM_MATH_SUCCESS);
|
|
}
|
|
#endif /* MVEF and MVEI */
|
|
|
|
/***************************************
|
|
|
|
Definitions available for MVEI only
|
|
|
|
***************************************/
|
|
#if (defined (ARM_MATH_HELIUM) || defined(ARM_MATH_MVEI)) && !defined(ARM_MATH_AUTOVECTORIZE)
|
|
|
|
#include "arm_common_tables.h"
|
|
|
|
#define MVE_ASRL_SAT16(acc, shift) ((sqrshrl_sat48(acc, -(32-shift)) >> 32) & 0xffffffff)
|
|
#define MVE_ASRL_SAT32(acc, shift) ((sqrshrl(acc, -(32-shift)) >> 32) & 0xffffffff)
|
|
|
|
|
|
#if !defined(ARM_DSP_CONFIG_TABLES) || defined(ARM_ALL_FAST_TABLES) || defined(ARM_TABLE_FAST_SQRT_Q31_MVE)
|
|
__STATIC_INLINE q31x4_t FAST_VSQRT_Q31(q31x4_t vecIn)
|
|
{
|
|
q63x2_t vecTmpLL;
|
|
q31x4_t vecTmp0, vecTmp1;
|
|
q31_t scale;
|
|
q63_t tmp64;
|
|
q31x4_t vecNrm, vecDst, vecIdx, vecSignBits;
|
|
|
|
|
|
vecSignBits = vclsq(vecIn);
|
|
vecSignBits = vbicq_n_s32(vecSignBits, 1);
|
|
/*
|
|
* in = in << no_of_sign_bits;
|
|
*/
|
|
vecNrm = vshlq(vecIn, vecSignBits);
|
|
/*
|
|
* index = in >> 24;
|
|
*/
|
|
vecIdx = vecNrm >> 24;
|
|
vecIdx = vecIdx << 1;
|
|
|
|
vecTmp0 = vldrwq_gather_shifted_offset_s32(sqrtTable_Q31, (uint32x4_t)vecIdx);
|
|
|
|
vecIdx = vecIdx + 1;
|
|
|
|
vecTmp1 = vldrwq_gather_shifted_offset_s32(sqrtTable_Q31, (uint32x4_t)vecIdx);
|
|
|
|
vecTmp1 = vqrdmulhq(vecTmp1, vecNrm);
|
|
vecTmp0 = vecTmp0 - vecTmp1;
|
|
vecTmp1 = vqrdmulhq(vecTmp0, vecTmp0);
|
|
vecTmp1 = vqrdmulhq(vecNrm, vecTmp1);
|
|
vecTmp1 = vdupq_n_s32(0x18000000) - vecTmp1;
|
|
vecTmp0 = vqrdmulhq(vecTmp0, vecTmp1);
|
|
vecTmpLL = vmullbq_int(vecNrm, vecTmp0);
|
|
|
|
/*
|
|
* scale elements 0, 2
|
|
*/
|
|
scale = 26 + (vecSignBits[0] >> 1);
|
|
tmp64 = asrl(vecTmpLL[0], scale);
|
|
vecDst[0] = (q31_t) tmp64;
|
|
|
|
scale = 26 + (vecSignBits[2] >> 1);
|
|
tmp64 = asrl(vecTmpLL[1], scale);
|
|
vecDst[2] = (q31_t) tmp64;
|
|
|
|
vecTmpLL = vmulltq_int(vecNrm, vecTmp0);
|
|
|
|
/*
|
|
* scale elements 1, 3
|
|
*/
|
|
scale = 26 + (vecSignBits[1] >> 1);
|
|
tmp64 = asrl(vecTmpLL[0], scale);
|
|
vecDst[1] = (q31_t) tmp64;
|
|
|
|
scale = 26 + (vecSignBits[3] >> 1);
|
|
tmp64 = asrl(vecTmpLL[1], scale);
|
|
vecDst[3] = (q31_t) tmp64;
|
|
/*
|
|
* set negative values to 0
|
|
*/
|
|
vecDst = vdupq_m(vecDst, 0, vcmpltq_n_s32(vecIn, 0));
|
|
|
|
return vecDst;
|
|
}
|
|
#endif
|
|
|
|
#if !defined(ARM_DSP_CONFIG_TABLES) || defined(ARM_ALL_FAST_TABLES) || defined(ARM_TABLE_FAST_SQRT_Q15_MVE)
|
|
__STATIC_INLINE q15x8_t FAST_VSQRT_Q15(q15x8_t vecIn)
|
|
{
|
|
q31x4_t vecTmpLev, vecTmpLodd, vecSignL;
|
|
q15x8_t vecTmp0, vecTmp1;
|
|
q15x8_t vecNrm, vecDst, vecIdx, vecSignBits;
|
|
|
|
vecDst = vuninitializedq_s16();
|
|
|
|
vecSignBits = vclsq(vecIn);
|
|
vecSignBits = vbicq_n_s16(vecSignBits, 1);
|
|
/*
|
|
* in = in << no_of_sign_bits;
|
|
*/
|
|
vecNrm = vshlq(vecIn, vecSignBits);
|
|
|
|
vecIdx = vecNrm >> 8;
|
|
vecIdx = vecIdx << 1;
|
|
|
|
vecTmp0 = vldrhq_gather_shifted_offset_s16(sqrtTable_Q15, (uint16x8_t)vecIdx);
|
|
|
|
vecIdx = vecIdx + 1;
|
|
|
|
vecTmp1 = vldrhq_gather_shifted_offset_s16(sqrtTable_Q15, (uint16x8_t)vecIdx);
|
|
|
|
vecTmp1 = vqrdmulhq(vecTmp1, vecNrm);
|
|
vecTmp0 = vecTmp0 - vecTmp1;
|
|
vecTmp1 = vqrdmulhq(vecTmp0, vecTmp0);
|
|
vecTmp1 = vqrdmulhq(vecNrm, vecTmp1);
|
|
vecTmp1 = vdupq_n_s16(0x1800) - vecTmp1;
|
|
vecTmp0 = vqrdmulhq(vecTmp0, vecTmp1);
|
|
|
|
vecSignBits = vecSignBits >> 1;
|
|
|
|
vecTmpLev = vmullbq_int(vecNrm, vecTmp0);
|
|
vecTmpLodd = vmulltq_int(vecNrm, vecTmp0);
|
|
|
|
vecTmp0 = vecSignBits + 10;
|
|
/*
|
|
* negate sign to apply register based vshl
|
|
*/
|
|
vecTmp0 = -vecTmp0;
|
|
|
|
/*
|
|
* shift even elements
|
|
*/
|
|
vecSignL = vmovlbq(vecTmp0);
|
|
vecTmpLev = vshlq(vecTmpLev, vecSignL);
|
|
/*
|
|
* shift odd elements
|
|
*/
|
|
vecSignL = vmovltq(vecTmp0);
|
|
vecTmpLodd = vshlq(vecTmpLodd, vecSignL);
|
|
/*
|
|
* merge and narrow odd and even parts
|
|
*/
|
|
vecDst = vmovnbq_s32(vecDst, vecTmpLev);
|
|
vecDst = vmovntq_s32(vecDst, vecTmpLodd);
|
|
/*
|
|
* set negative values to 0
|
|
*/
|
|
vecDst = vdupq_m(vecDst, 0, vcmpltq_n_s16(vecIn, 0));
|
|
|
|
return vecDst;
|
|
}
|
|
#endif
|
|
|
|
#endif /* defined (ARM_MATH_HELIUM) || defined(ARM_MATH_MVEI) */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|