--- /dev/null
+/******************************************************************************
+*
+* Copyright (c) 2019 Intel.
+*
+* 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
+*
+* http://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.
+*
+*******************************************************************************/
+
+/**
+ * @brief xRAN BFP compression/decompression for C-plane with 32T32R
+ *
+ * @file xran_bfp_cplane32.cpp
+ * @ingroup group_source_xran
+ * @author Intel Corporation
+ **/
+
+#include "xran_compression.hpp"
+#include "xran_bfp_utils.hpp"
+#include <complex>
+#include <algorithm>
+#include <immintrin.h>
+
+
+namespace BFP_CPlane_32
+{
+ /// Namespace constants
+ const int k_numDataElements = 64; /// 16 IQ pairs
+ const int k_numRegsPerBlock = 2; /// Number of AVX512 registers per compression block (input)
+
+ inline int
+ maxAbsOneBlock(const __m512i* inData)
+ {
+ /// Vertical maxAbs on all registers
+ __m512i maxAbsReg = __m512i();
+#pragma unroll(k_numRegsPerBlock)
+ for (int n = 0; n < k_numRegsPerBlock; ++n)
+ {
+ const auto thisRegAbs = _mm512_abs_epi16(inData[n]);
+ maxAbsReg = _mm512_max_epi16(thisRegAbs, maxAbsReg);
+ }
+ /// Horizontal max across remaining register
+ return BlockFloatCompander::horizontalMax1x32(maxAbsReg);
+ }
+
+ /// Compute exponent value for a set of 16 RB from the maximum absolute value
+ inline __m512i
+ computeExponent_16RB(const BlockFloatCompander::ExpandedData& dataIn, const __m512i totShiftBits)
+ {
+ __m512i maxAbs = __m512i();
+ const __m512i* dataInAddr = reinterpret_cast<const __m512i*>(dataIn.dataExpanded);
+#pragma unroll(16)
+ for (int n = 0; n < 16; ++n)
+ {
+ ((uint32_t*)&maxAbs)[n] = maxAbsOneBlock(dataInAddr + n * k_numRegsPerBlock);
+ }
+ /// Calculate exponent
+ return BlockFloatCompander::expLzCnt(maxAbs, totShiftBits);
+ }
+
+ /// Compute exponent value for a set of 4 RB from the maximum absolute value
+ inline __m512i
+ computeExponent_4RB(const BlockFloatCompander::ExpandedData& dataIn, const __m512i totShiftBits)
+ {
+ __m512i maxAbs = __m512i();
+ const __m512i* dataInAddr = reinterpret_cast<const __m512i*>(dataIn.dataExpanded);
+#pragma unroll(4)
+ for (int n = 0; n < 4; ++n)
+ {
+ ((uint32_t*)&maxAbs)[n] = maxAbsOneBlock(dataInAddr + n * k_numRegsPerBlock);
+ }
+ /// Calculate exponent
+ return BlockFloatCompander::expLzCnt(maxAbs, totShiftBits);
+ }
+
+ /// Compute exponent value for 1 RB from the maximum absolute value
+ inline uint8_t
+ computeExponent_1RB(const BlockFloatCompander::ExpandedData& dataIn, const __m512i totShiftBits)
+ {
+ __m512i maxAbs = __m512i();
+ const __m512i* dataInAddr = reinterpret_cast<const __m512i*>(dataIn.dataExpanded);
+ ((uint32_t*)&maxAbs)[0] = maxAbsOneBlock(dataInAddr);
+ /// Calculate exponent
+ const auto exps = BlockFloatCompander::expLzCnt(maxAbs, totShiftBits);
+ return ((uint8_t*)&exps)[0];
+ }
+
+
+
+ /// Apply compression to one compression block
+ template<BlockFloatCompander::PackFunction networkBytePack>
+ inline void
+ applyCompressionN_1RB(const __m512i* dataIn, uint8_t* outBlockAddr,
+ const int iqWidth, const uint8_t thisExp, const int totNumBytesPerReg, const uint16_t rbWriteMask)
+ {
+ /// Store exponent first
+ *outBlockAddr = thisExp;
+#pragma unroll(k_numRegsPerBlock)
+ for (int n = 0; n < k_numRegsPerBlock; ++n)
+ {
+ /// Apply the exponent shift
+ const auto compData = _mm512_srai_epi16(dataIn[n], thisExp);
+ /// Pack compressed data network byte order
+ const auto compDataBytePacked = networkBytePack(compData);
+ /// Now have 1 register worth of bytes separated into 4 chunks (1 per lane)
+ /// Use four offset stores to join
+ const auto thisOutRegAddr = outBlockAddr + 1 + n * totNumBytesPerReg;
+ _mm_mask_storeu_epi8(thisOutRegAddr, rbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 0));
+ _mm_mask_storeu_epi8(thisOutRegAddr + iqWidth, rbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 1));
+ _mm_mask_storeu_epi8(thisOutRegAddr + (2 * iqWidth), rbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 2));
+ _mm_mask_storeu_epi8(thisOutRegAddr + (3 * iqWidth), rbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 3));
+ }
+ }
+
+ /// Derive and apply 9, 10, or 12bit compression to 16 compression blocks
+ template<BlockFloatCompander::PackFunction networkBytePack>
+ inline void
+ compressN_16RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut,
+ const __m512i totShiftBits, const int totNumBytesPerBlock, const int totNumBytesPerReg, const uint16_t rbWriteMask)
+ {
+ const auto exponents = computeExponent_16RB(dataIn, totShiftBits);
+ const __m512i* dataInAddr = reinterpret_cast<const __m512i*>(dataIn.dataExpanded);
+#pragma unroll(16)
+ for (int n = 0; n < 16; ++n)
+ {
+ applyCompressionN_1RB<networkBytePack>(dataInAddr + n * k_numRegsPerBlock, dataOut->dataCompressed + n * totNumBytesPerBlock, dataIn.iqWidth, ((uint8_t*)&exponents)[n * 4], totNumBytesPerReg, rbWriteMask);
+ }
+ }
+
+ /// Derive and apply 9, 10, or 12bit compression to 4 compression blocks
+ template<BlockFloatCompander::PackFunction networkBytePack>
+ inline void
+ compressN_4RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut,
+ const __m512i totShiftBits, const int totNumBytesPerBlock, const int totNumBytesPerReg, const uint16_t rbWriteMask)
+ {
+ const auto exponents = computeExponent_4RB(dataIn, totShiftBits);
+ const __m512i* dataInAddr = reinterpret_cast<const __m512i*>(dataIn.dataExpanded);
+#pragma unroll(4)
+ for (int n = 0; n < 4; ++n)
+ {
+ applyCompressionN_1RB<networkBytePack>(dataInAddr + n * k_numRegsPerBlock, dataOut->dataCompressed + n * totNumBytesPerBlock, dataIn.iqWidth, ((uint8_t*)&exponents)[n * 4], totNumBytesPerReg, rbWriteMask);
+ }
+ }
+
+ /// Derive and apply 9, 10, or 12bit compression to 1 RB
+ template<BlockFloatCompander::PackFunction networkBytePack>
+ inline void
+ compressN_1RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut,
+ const __m512i totShiftBits, const int totNumBytesPerBlock, const int totNumBytesPerReg, const uint16_t rbWriteMask)
+ {
+ const auto thisExponent = computeExponent_1RB(dataIn, totShiftBits);
+ const __m512i* dataInAddr = reinterpret_cast<const __m512i*>(dataIn.dataExpanded);
+ applyCompressionN_1RB<networkBytePack>(dataInAddr, dataOut->dataCompressed, dataIn.iqWidth, thisExponent, totNumBytesPerReg, rbWriteMask);
+ }
+
+ /// Calls compression function specific to the number of blocks to be executed. For 9, 10, or 12bit iqWidth.
+ template<BlockFloatCompander::PackFunction networkBytePack>
+ inline void
+ compressByAllocN(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut,
+ const __m512i totShiftBits, const int totNumBytesPerBlock, const int totNumBytesPerReg, const uint16_t rbWriteMask)
+ {
+ switch (dataIn.numBlocks)
+ {
+ case 16:
+ compressN_16RB<networkBytePack>(dataIn, dataOut, totShiftBits, totNumBytesPerBlock, totNumBytesPerReg, rbWriteMask);
+ break;
+
+ case 4:
+ compressN_4RB<networkBytePack>(dataIn, dataOut, totShiftBits, totNumBytesPerBlock, totNumBytesPerReg, rbWriteMask);
+ break;
+
+ case 1:
+ compressN_1RB<networkBytePack>(dataIn, dataOut, totShiftBits, totNumBytesPerBlock, totNumBytesPerReg, rbWriteMask);
+ break;
+ }
+ }
+
+
+
+ /// Apply 8b compression to 1 compression block.
+ inline void
+ applyCompression8_1RB(const __m512i* dataIn, uint8_t* outBlockAddr, const uint8_t thisExp)
+ {
+ /// Store exponent first
+ *outBlockAddr = thisExp;
+ constexpr uint32_t k_writeMask = 0xFFFFFFFF;
+ __m256i* regOutAddr = reinterpret_cast<__m256i*>(outBlockAddr + 1);
+#pragma unroll(k_numRegsPerBlock)
+ for (int n = 0; n < k_numRegsPerBlock; ++n)
+ {
+ /// Apply the exponent shift
+ const auto compData = _mm512_srai_epi16(dataIn[n], thisExp);
+ /// Truncate to 8bit and store
+ _mm256_mask_storeu_epi8(regOutAddr + n, k_writeMask, _mm512_cvtepi16_epi8(compData));
+ }
+ }
+
+ /// Derive and apply 8b compression to 16 compression blocks
+ inline void
+ compress8_16RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut, const __m512i totShiftBits)
+ {
+ const auto exponents = computeExponent_16RB(dataIn, totShiftBits);
+ const __m512i* dataInAddr = reinterpret_cast<const __m512i*>(dataIn.dataExpanded);
+#pragma unroll(16)
+ for (int n = 0; n < 16; ++n)
+ {
+ applyCompression8_1RB(dataInAddr + n * k_numRegsPerBlock, dataOut->dataCompressed + n * (k_numDataElements + 1), ((uint8_t*)&exponents)[n * 4]);
+ }
+ }
+
+ /// Derive and apply 8b compression to 4 compression blocks
+ inline void
+ compress8_4RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut, const __m512i totShiftBits)
+ {
+ const auto exponents = computeExponent_4RB(dataIn, totShiftBits);
+ const __m512i* dataInAddr = reinterpret_cast<const __m512i*>(dataIn.dataExpanded);
+#pragma unroll(4)
+ for (int n = 0; n < 4; ++n)
+ {
+ applyCompression8_1RB(dataInAddr + n * k_numRegsPerBlock, dataOut->dataCompressed + n * (k_numDataElements + 1), ((uint8_t*)&exponents)[n * 4]);
+ }
+ }
+
+ /// Derive and apply 8b compression to 1 compression block
+ inline void
+ compress8_1RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut, const __m512i totShiftBits)
+ {
+ const auto thisExponent = computeExponent_1RB(dataIn, totShiftBits);
+ const __m512i* dataInAddr = reinterpret_cast<const __m512i*>(dataIn.dataExpanded);
+ applyCompression8_1RB(dataInAddr, dataOut->dataCompressed, thisExponent);
+ }
+
+ /// Calls compression function specific to the number of RB to be executed. For 8 bit iqWidth.
+ inline void
+ compressByAlloc8(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut, const __m512i totShiftBits)
+ {
+ switch (dataIn.numBlocks)
+ {
+ case 16:
+ compress8_16RB(dataIn, dataOut, totShiftBits);
+ break;
+
+ case 4:
+ compress8_4RB(dataIn, dataOut, totShiftBits);
+ break;
+
+ case 1:
+ compress8_1RB(dataIn, dataOut, totShiftBits);
+ break;
+ }
+ }
+
+
+
+ /// Expand 1 compression block
+ template<BlockFloatCompander::UnpackFunction networkByteUnpack>
+ inline void
+ applyExpansionN_1RB(const uint8_t* expAddr, __m512i* dataOutAddr, const int maxExpShift, const int totNumBytesPerReg)
+ {
+ static constexpr uint8_t k_WriteMask = 0xFF;
+ const auto thisExpShift = maxExpShift - *expAddr;
+#pragma unroll(k_numRegsPerBlock)
+ for (int n = 0; n < k_numRegsPerBlock; ++n)
+ {
+ const auto thisInRegAddr = expAddr + 1 + n * totNumBytesPerReg;
+ /// Unpack network order packed data
+ const auto inDataUnpacked = networkByteUnpack(thisInRegAddr);
+ /// Apply exponent scaling (by appropriate arithmetic shift right)
+ const auto expandedData = _mm512_srai_epi16(inDataUnpacked, thisExpShift);
+ /// Write expanded data to output
+ _mm512_mask_storeu_epi64(dataOutAddr + n, k_WriteMask, expandedData);
+ }
+ }
+
+ /// Calls expansion function specific to the number of blocks to be executed. For 9, 10, or 12bit iqWidth.
+ template<BlockFloatCompander::UnpackFunction networkByteUnpack>
+ void
+ expandByAllocN(const BlockFloatCompander::CompressedData& dataIn, BlockFloatCompander::ExpandedData* dataOut,
+ const int totNumBytesPerBlock, const int totNumBytesPerReg, const int maxExpShift)
+ {
+ __m512i* dataOutAddr = reinterpret_cast<__m512i*>(dataOut->dataExpanded);
+ switch (dataIn.numBlocks)
+ {
+ case 16:
+#pragma unroll(16)
+ for (int n = 0; n < 16; ++n)
+ {
+ applyExpansionN_1RB<networkByteUnpack>(dataIn.dataCompressed + n * totNumBytesPerBlock, dataOutAddr + n * k_numRegsPerBlock, maxExpShift, totNumBytesPerReg);
+ }
+ break;
+
+ case 4:
+#pragma unroll(4)
+ for (int n = 0; n < 4; ++n)
+ {
+ applyExpansionN_1RB<networkByteUnpack>(dataIn.dataCompressed + n * totNumBytesPerBlock, dataOutAddr + n * k_numRegsPerBlock, maxExpShift, totNumBytesPerReg);
+ }
+ break;
+
+ case 1:
+ applyExpansionN_1RB<networkByteUnpack>(dataIn.dataCompressed, dataOutAddr, maxExpShift, totNumBytesPerReg);
+ break;
+ }
+ }
+
+
+ /// Apply expansion to 1 compression block
+ inline void
+ applyExpansion8_1RB(const uint8_t* expAddr, __m512i* dataOutAddr)
+ {
+ const __m256i* rawDataIn = reinterpret_cast<const __m256i*>(expAddr + 1);
+ static constexpr uint8_t k_WriteMask = 0xFF;
+#pragma unroll(k_numRegsPerBlock)
+ for (int n = 0; n < k_numRegsPerBlock; ++n)
+ {
+ const auto compData16 = _mm512_cvtepi8_epi16(rawDataIn[n]);
+ const auto expData = _mm512_slli_epi16(compData16, *expAddr);
+ _mm512_mask_storeu_epi64(dataOutAddr + n, k_WriteMask, expData);
+ }
+ }
+
+ /// Calls expansion function specific to the number of RB to be executed. For 8 bit iqWidth.
+ void
+ expandByAlloc8(const BlockFloatCompander::CompressedData& dataIn, BlockFloatCompander::ExpandedData* dataOut)
+ {
+ __m512i* dataOutAddr = reinterpret_cast<__m512i*>(dataOut->dataExpanded);
+ switch (dataIn.numBlocks)
+ {
+ case 16:
+#pragma unroll(16)
+ for (int n = 0; n < 16; ++n)
+ {
+ applyExpansion8_1RB(dataIn.dataCompressed + n * (k_numDataElements + 1), dataOutAddr + n * k_numRegsPerBlock);
+ }
+ break;
+
+ case 4:
+#pragma unroll(4)
+ for (int n = 0; n < 4; ++n)
+ {
+ applyExpansion8_1RB(dataIn.dataCompressed + n * (k_numDataElements + 1), dataOutAddr + n * k_numRegsPerBlock);
+ }
+ break;
+
+ case 1:
+ applyExpansion8_1RB(dataIn.dataCompressed, dataOutAddr);
+ break;
+ }
+ }
+}
+
+
+/// Main kernel function for 32 antenna C-plane compression.
+/// Starts by determining iqWidth specific parameters and functions.
+void
+BlockFloatCompander::BFPCompressCtrlPlane32Avx512(const ExpandedData& dataIn, CompressedData* dataOut)
+{
+ /// Compensation for extra zeros in 32b leading zero count when computing exponent
+ const auto totShiftBits8 = _mm512_set1_epi32(25);
+ const auto totShiftBits9 = _mm512_set1_epi32(24);
+ const auto totShiftBits10 = _mm512_set1_epi32(23);
+ const auto totShiftBits12 = _mm512_set1_epi32(21);
+
+ /// Total number of data bytes per compression block is (iqWidth * numElements / 8) + 1
+ const auto totNumBytesPerBlock = ((BFP_CPlane_32::k_numDataElements * dataIn.iqWidth) >> 3) + 1;
+ /// Total number of compressed bytes to handle per register is 32 * iqWidth / 8
+ const auto totNumBytesPerReg = dataIn.iqWidth << 2;
+
+ /// Compressed data write mask for each iqWidth option
+ constexpr uint16_t rbWriteMask9 = 0x01FF;
+ constexpr uint16_t rbWriteMask10 = 0x03FF;
+ constexpr uint16_t rbWriteMask12 = 0x0FFF;
+
+ switch (dataIn.iqWidth)
+ {
+ case 8:
+ BFP_CPlane_32::compressByAlloc8(dataIn, dataOut, totShiftBits8);
+ break;
+
+ case 9:
+ BFP_CPlane_32::compressByAllocN<BlockFloatCompander::networkBytePack9b>(dataIn, dataOut, totShiftBits9, totNumBytesPerBlock, totNumBytesPerReg, rbWriteMask9);
+ break;
+
+ case 10:
+ BFP_CPlane_32::compressByAllocN<BlockFloatCompander::networkBytePack10b>(dataIn, dataOut, totShiftBits10, totNumBytesPerBlock, totNumBytesPerReg, rbWriteMask10);
+ break;
+
+ case 12:
+ BFP_CPlane_32::compressByAllocN<BlockFloatCompander::networkBytePack12b>(dataIn, dataOut, totShiftBits12, totNumBytesPerBlock, totNumBytesPerReg, rbWriteMask12);
+ break;
+ }
+}
+
+
+/// Main kernel function for 32 antenna C-plane expansion.
+/// Starts by determining iqWidth specific parameters and functions.
+void
+BlockFloatCompander::BFPExpandCtrlPlane32Avx512(const CompressedData& dataIn, ExpandedData* dataOut)
+{
+ constexpr int k_maxExpShift9 = 7;
+ constexpr int k_maxExpShift10 = 6;
+ constexpr int k_maxExpShift12 = 4;
+
+ /// Total number of data bytes per compression block is (iqWidth * numElements / 8) + 1
+ const auto totNumBytesPerBlock = ((BFP_CPlane_32::k_numDataElements * dataIn.iqWidth) >> 3) + 1;
+ /// Total number of compressed bytes to handle per register is 32 * iqWidth / 8
+ const auto totNumBytesPerReg = dataIn.iqWidth << 2;
+
+ switch (dataIn.iqWidth)
+ {
+ case 8:
+ BFP_CPlane_32::expandByAlloc8(dataIn, dataOut);
+ break;
+
+ case 9:
+ BFP_CPlane_32::expandByAllocN<BlockFloatCompander::networkByteUnpack9b>(dataIn, dataOut, totNumBytesPerBlock, totNumBytesPerReg, k_maxExpShift9);
+ break;
+
+ case 10:
+ BFP_CPlane_32::expandByAllocN<BlockFloatCompander::networkByteUnpack10b>(dataIn, dataOut, totNumBytesPerBlock, totNumBytesPerReg, k_maxExpShift10);
+ break;
+
+ case 12:
+ BFP_CPlane_32::expandByAllocN<BlockFloatCompander::networkByteUnpack12b>(dataIn, dataOut, totNumBytesPerBlock, totNumBytesPerReg, k_maxExpShift12);
+ break;
+ }
+}
Code Review / o-du / phy.git / blobdiff