*
*******************************************************************************/
+/**
+ * @brief xRAN BFP compression/decompression U-plane implementation and interface functions
+ *
+ * @file xran_compression.cpp
+ * @ingroup group_source_xran
+ * @author Intel Corporation
+ **/
+
#include "xran_compression.hpp"
+#include "xran_bfp_utils.hpp"
+#include "xran_compression.h"
#include <complex>
#include <algorithm>
#include <immintrin.h>
+#include <limits.h>
+#include <cstring>
-void
-BlockFloatCompander::BlockFloatCompress_AVX512(const ExpandedData& dataIn, CompressedData* dataOut)
+namespace BFP_UPlane
{
- __m512i maxAbs = __m512i();
+ /// Namespace constants
+ const int k_numREReal = 24; /// 12 IQ pairs
+
+ /// Perform horizontal max of 16 bit values across each lane
+ __m512i
+ horizontalMax4x16(const __m512i maxAbsIn)
+ {
+ /// Swap 64b in each lane and compute max
+ const auto k_perm64b = _mm512_set_epi64(6, 7, 4, 5, 2, 3, 0, 1);
+ auto maxAbsPerm = _mm512_permutexvar_epi64(k_perm64b, maxAbsIn);
+ auto maxAbsHorz = _mm512_max_epi16(maxAbsIn, maxAbsPerm);
+
+ /// Swap each pair of 32b in each lane and compute max
+ const auto k_perm32b = _mm512_set_epi32(14, 15, 12, 13, 10, 11, 8, 9, 6, 7, 4, 5, 2, 3, 0, 1);
+ maxAbsPerm = _mm512_permutexvar_epi32(k_perm32b, maxAbsHorz);
+ maxAbsHorz = _mm512_max_epi16(maxAbsHorz, maxAbsPerm);
+
+ /// Swap each IQ pair in each lane (via 32b rotation) and compute max
+ maxAbsPerm = _mm512_rol_epi32(maxAbsHorz, BlockFloatCompander::k_numBitsIQ);
+ return _mm512_max_epi16(maxAbsHorz, maxAbsPerm);
+ }
- /// Load data and find max(abs(RB))
- const __m512i* rawData = reinterpret_cast<const __m512i*>(dataIn.dataExpanded);
- static constexpr int k_numInputLoopIts = BlockFloatCompander::k_numRB / 4;
-#pragma unroll(k_numInputLoopIts)
- for (int n = 0; n < k_numInputLoopIts; ++n)
+ /// Perform U-plane input data re-ordering and vertical max abs of 16b values
+ /// Works on 4 RB at a time
+ __m512i
+ maxAbsVertical4RB(const __m512i inA, const __m512i inB, const __m512i inC)
{
/// Re-order the next 4RB in input data into 3 registers
/// Input SIMD vectors are:
/// [A A A A B B B B C C C C D D D D]
/// [A A A A B B B B C C C C D D D D]
/// [A A A A B B B B C C C C D D D D]
- static constexpr uint8_t k_msk1 = 0b11111100; // Copy first lane of src
- static constexpr int k_shuff1 = 0x41;
- const auto z_w1 = _mm512_mask_shuffle_i64x2(rawData[3 * n + 0], k_msk1, rawData[3 * n + 1], rawData[3 * n + 2], k_shuff1);
+ constexpr uint8_t k_msk1 = 0b11111100; // Copy first lane of src
+ constexpr int k_shuff1 = 0x41;
+ const auto z_w1 = _mm512_mask_shuffle_i64x2(inA, k_msk1, inB, inC, k_shuff1);
- static constexpr uint8_t k_msk2 = 0b11000011; // Copy middle two lanes of src
- static constexpr int k_shuff2 = 0xB1;
- const auto z_w2 = _mm512_mask_shuffle_i64x2(rawData[3 * n + 1], k_msk2, rawData[3 * n + 0], rawData[3 * n + 2], k_shuff2);
+ constexpr uint8_t k_msk2 = 0b11000011; // Copy middle two lanes of src
+ constexpr int k_shuff2 = 0xB1;
+ const auto z_w2 = _mm512_mask_shuffle_i64x2(inB, k_msk2, inA, inC, k_shuff2);
- static constexpr uint8_t k_msk3 = 0b00111111; // Copy last lane of src
- static constexpr int k_shuff3 = 0xBE;
- const auto z_w3 = _mm512_mask_shuffle_i64x2(rawData[3 * n + 2], k_msk3, rawData[3 * n + 0], rawData[3 * n + 1], k_shuff3);
+ constexpr uint8_t k_msk3 = 0b00111111; // Copy last lane of src
+ constexpr int k_shuff3 = 0xBE;
+ const auto z_w3 = _mm512_mask_shuffle_i64x2(inC, k_msk3, inA, inB, k_shuff3);
/// Perform max abs on these 3 registers
const auto abs16_1 = _mm512_abs_epi16(z_w1);
const auto abs16_2 = _mm512_abs_epi16(z_w2);
const auto abs16_3 = _mm512_abs_epi16(z_w3);
- const auto maxAbs_12 = _mm512_max_epi16(abs16_1, abs16_2);
- const auto maxAbs_123 = _mm512_max_epi16(maxAbs_12, abs16_3);
+ return _mm512_max_epi16(_mm512_max_epi16(abs16_1, abs16_2), abs16_3);
+ }
- /// Perform horizontal max over each lane
- /// Swap 64b in each lane and compute max
- static const auto k_perm64b = _mm512_set_epi64(6, 7, 4, 5, 2, 3, 0, 1);
- auto maxAbsPerm = _mm512_permutexvar_epi64(k_perm64b, maxAbs_123);
- auto maxAbsHorz = _mm512_max_epi16(maxAbs_123, maxAbsPerm);
- /// Swap each pair of 32b in each lane and compute max
- static const auto k_perm32b = _mm512_set_epi32(14, 15, 12, 13, 10, 11, 8, 9, 6, 7, 4, 5, 2, 3, 0, 1);
- maxAbsPerm = _mm512_permutexvar_epi32(k_perm32b, maxAbsHorz);
- maxAbsHorz = _mm512_max_epi16(maxAbsHorz, maxAbsPerm);
+ /// Selects first 32 bit value in each src lane and packs into laneNum of dest
+ __m512i
+ slidePermute(const __m512i src, const __m512i dest, const int laneNum)
+ {
+ const auto k_selectVals = _mm512_set_epi32(28, 24, 20, 16, 28, 24, 20, 16,
+ 28, 24, 20, 16, 28, 24, 20, 16);
+ constexpr uint16_t k_laneMsk[4] = { 0x000F, 0x00F0, 0x0F00, 0xF000 };
+ return _mm512_mask_permutex2var_epi32(dest, k_laneMsk[laneNum], k_selectVals, src);
+ }
- /// Swap each IQ pair in each lane (via 32b rotation) and compute max
- maxAbsPerm = _mm512_rol_epi32(maxAbsHorz, BlockFloatCompander::k_numBitsIQ);
- maxAbsHorz = _mm512_max_epi16(maxAbsHorz, maxAbsPerm);
- /// Insert values into maxAbs
- /// Use sliding mask to insert wanted values into maxAbs
- /// Pairs of values will be inserted and corrected outside of loop
- static const auto k_select4RB = _mm512_set_epi32(28, 24, 20, 16, 28, 24, 20, 16,
- 28, 24, 20, 16, 28, 24, 20, 16);
- static constexpr uint16_t k_expMsk[k_numInputLoopIts] = { 0x000F, 0x00F0, 0x0F00, 0xF000 };
- maxAbs = _mm512_mask_permutex2var_epi32(maxAbs, k_expMsk[n], k_select4RB, maxAbsHorz);
- }
-
- /// Convert to 32b by removing repeated values in maxAbs
- static const auto k_upperWordMask = _mm512_set_epi64(0x0000FFFF0000FFFF, 0x0000FFFF0000FFFF,
- 0x0000FFFF0000FFFF, 0x0000FFFF0000FFFF,
- 0x0000FFFF0000FFFF, 0x0000FFFF0000FFFF,
- 0x0000FFFF0000FFFF, 0x0000FFFF0000FFFF);
- maxAbs = _mm512_and_epi64(maxAbs, k_upperWordMask);
-
- /// Compute exponent and store for later use
- static constexpr int k_expTotShiftBits = 32 - BlockFloatCompander::k_iqWidth + 1;
- const auto totShiftBits = _mm512_set1_epi32(k_expTotShiftBits);
- const auto lzCount = _mm512_lzcnt_epi32(maxAbs);
- const auto exponent = _mm512_sub_epi32(totShiftBits, lzCount);
- int8_t storedExp[BlockFloatCompander::k_numRB] = {};
- static constexpr uint16_t k_expWriteMask = 0xFFFF;
- _mm512_mask_cvtepi32_storeu_epi8(storedExp, k_expWriteMask, exponent);
-
- /// Shift 1RB by corresponding exponent and write exponent and data to output
- /// Output data is packed exponent first followed by corresponding compressed RB
-#pragma unroll(BlockFloatCompander::k_numRB)
- for (int n = 0; n < BlockFloatCompander::k_numRB; ++n)
- {
- const __m512i* rawDataIn = reinterpret_cast<const __m512i*>(dataIn.dataExpanded + n * BlockFloatCompander::k_numREReal);
- auto compData = _mm512_srai_epi16(*rawDataIn, storedExp[n]);
-
- dataOut->dataCompressed[n * (BlockFloatCompander::k_numREReal + 1)] = storedExp[n];
- static constexpr uint32_t k_rbMask = 0x00FFFFFF; // Write mask for 1RB (24 values)
- _mm512_mask_cvtepi16_storeu_epi8(dataOut->dataCompressed + n * (BlockFloatCompander::k_numREReal + 1) + 1, k_rbMask, compData);
+ /// Compute exponent value for a set of 16 RB from the maximum absolute value.
+ /// Max Abs operates in a loop, executing 4 RB per iteration. The results are
+ /// packed into the final output register.
+ __m512i
+ computeExponent_16RB(const BlockFloatCompander::ExpandedData& dataIn, const __m512i totShiftBits)
+ {
+ __m512i maxAbs = __m512i();
+ const __m512i* rawData = reinterpret_cast<const __m512i*>(dataIn.dataExpanded);
+ /// Max Abs loop operates on 4RB at a time
+#pragma unroll(4)
+ for (int n = 0; n < 4; ++n)
+ {
+ /// Re-order and vertical max abs
+ auto maxAbsVert = maxAbsVertical4RB(rawData[3 * n + 0], rawData[3 * n + 1], rawData[3 * n + 2]);
+ /// Horizontal max abs
+ auto maxAbsHorz = horizontalMax4x16(maxAbsVert);
+ /// Pack these 4 values into maxAbs
+ maxAbs = slidePermute(maxAbsHorz, maxAbs, n);
+ }
+ /// Calculate exponent
+ const auto maxAbs32 = BlockFloatCompander::maskUpperWord(maxAbs);
+ return BlockFloatCompander::expLzCnt(maxAbs32, totShiftBits);
}
-}
-void
-BlockFloatCompander::BlockFloatExpand_AVX512(const CompressedData& dataIn, ExpandedData* dataOut)
-{
-#pragma unroll(BlockFloatCompander::k_numRB)
- for (int n = 0; n < BlockFloatCompander::k_numRB; ++n)
+ /// Compute exponent value for a set of 4 RB from the maximum absolute value.
+ /// Note that we do not need to perform any packing of result as we are only
+ /// computing 4 RB. The appropriate offset is taken later when extracting the
+ /// exponent.
+ __m512i
+ computeExponent_4RB(const BlockFloatCompander::ExpandedData& dataIn, const __m512i totShiftBits)
{
- /// Expand 1RB of data
- const __m256i* rawDataIn = reinterpret_cast<const __m256i*>(dataIn.dataCompressed + n * (BlockFloatCompander::k_numREReal + 1) + 1);
- const auto compData16 = _mm512_cvtepi8_epi16(*rawDataIn);
- const auto expData = _mm512_slli_epi16(compData16, *(dataIn.dataCompressed + n * (BlockFloatCompander::k_numREReal + 1)));
+ const __m512i* rawData = reinterpret_cast<const __m512i*>(dataIn.dataExpanded);
+ /// Re-order and vertical max abs
+ const auto maxAbsVert = maxAbsVertical4RB(rawData[0], rawData[1], rawData[2]);
+ /// Horizontal max abs
+ const auto maxAbsHorz = horizontalMax4x16(maxAbsVert);
+ /// Calculate exponent
+ const auto maxAbs = BlockFloatCompander::maskUpperWord(maxAbsHorz);
+ return BlockFloatCompander::expLzCnt(maxAbs, totShiftBits);
+ }
+
+
+ /// Compute exponent value for 1 RB from the maximum absolute value.
+ /// This works with horizontal max abs only, and needs to include a
+ /// step to select the final exponent from the 4 lanes.
+ uint8_t
+ computeExponent_1RB(const BlockFloatCompander::ExpandedData& dataIn, const __m512i totShiftBits)
+ {
+ const __m512i* rawData = reinterpret_cast<const __m512i*>(dataIn.dataExpanded);
+ /// Abs
+ const auto rawDataAbs = _mm512_abs_epi16(rawData[0]);
+ /// No need to do a full horizontal max operation here, just do a max IQ step,
+ /// compute the exponents and then use a reduce max over all exponent values. This
+ /// is the fastest way to handle a single RB.
+ const auto rawAbsIQSwap = _mm512_rol_epi32(rawDataAbs, BlockFloatCompander::k_numBitsIQ);
+ const auto maxAbsIQ = _mm512_max_epi16(rawDataAbs, rawAbsIQSwap);
+ /// Calculate exponent
+ const auto maxAbsIQ32 = BlockFloatCompander::maskUpperWord(maxAbsIQ);
+ const auto exps = BlockFloatCompander::expLzCnt(maxAbsIQ32, totShiftBits);
+ /// At this point we have exponent values for the maximum of each IQ pair.
+ /// Run a reduce max step to compute the maximum exponent value in the first
+ /// three lanes - this will give the desired exponent for this RB.
+ constexpr uint16_t k_expMsk = 0x0FFF;
+ return (uint8_t)_mm512_mask_reduce_max_epi32(k_expMsk, exps);
+ }
+
+
+ /// Apply compression to 1 RB
+ template<BlockFloatCompander::PackFunction networkBytePack>
+ void
+ applyCompressionN_1RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut,
+ const int numREOffset, const uint8_t thisExp, const int thisRBExpAddr, const uint16_t rbWriteMask)
+ {
+ /// Get AVX512 pointer aligned to desired RB
+ const __m512i* rawDataIn = reinterpret_cast<const __m512i*>(dataIn.dataExpanded + numREOffset);
+ /// Apply the exponent shift
+ const auto compData = _mm512_srai_epi16(*rawDataIn, thisExp);
+ /// Pack compressed data network byte order
+ const auto compDataBytePacked = networkBytePack(compData);
+ /// Store exponent first
+ dataOut->dataCompressed[thisRBExpAddr] = thisExp;
+ /// Now have 1 RB worth of bytes separated into 3 chunks (1 per lane)
+ /// Use three offset stores to join
+ _mm_mask_storeu_epi8(dataOut->dataCompressed + thisRBExpAddr + 1, rbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 0));
+ _mm_mask_storeu_epi8(dataOut->dataCompressed + thisRBExpAddr + 1 + dataIn.iqWidth, rbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 1));
+ _mm_mask_storeu_epi8(dataOut->dataCompressed + thisRBExpAddr + 1 + (2 * dataIn.iqWidth), rbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 2));
+ }
+
+
+ /// Apply 9, 10, or 12bit compression to 16 RB
+ template<BlockFloatCompander::PackFunction networkBytePack>
+ void
+ compressN_16RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut,
+ const __m512i totShiftBits, const int totNumBytesPerRB, const uint16_t rbWriteMask)
+ {
+ const auto exponents = computeExponent_16RB(dataIn, totShiftBits);
+#pragma unroll(16)
+ for (int n = 0; n < 16; ++n)
+ {
+ applyCompressionN_1RB<networkBytePack>(dataIn, dataOut, n * k_numREReal, ((uint8_t*)&exponents)[n * 4], n * totNumBytesPerRB, rbWriteMask);
+ }
+ }
+
+
+ /// Apply 9, 10, or 12bit compression to 4 RB
+ template<BlockFloatCompander::PackFunction networkBytePack>
+ void
+ compressN_4RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut,
+ const __m512i totShiftBits, const int totNumBytesPerRB, const uint16_t rbWriteMask)
+ {
+ const auto exponents = computeExponent_4RB(dataIn, totShiftBits);
+#pragma unroll(4)
+ for (int n = 0; n < 4; ++n)
+ {
+ applyCompressionN_1RB<networkBytePack>(dataIn, dataOut, n * k_numREReal, ((uint8_t*)&exponents)[n * 16], n * totNumBytesPerRB, rbWriteMask);
+ }
+ }
+
+
+ /// Apply 9, 10, or 12bit compression to 1 RB
+ template<BlockFloatCompander::PackFunction networkBytePack>
+ void
+ compressN_1RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut,
+ const __m512i totShiftBits, const int totNumBytesPerRB, const uint16_t rbWriteMask)
+ {
+ const auto thisExponent = computeExponent_1RB(dataIn, totShiftBits);
+ applyCompressionN_1RB<networkBytePack>(dataIn, dataOut, 0, thisExponent, 0, rbWriteMask);
+ }
+
+
+ /// Calls compression function specific to the number of RB to be executed. For 9, 10, or 12bit iqWidth.
+ template<BlockFloatCompander::PackFunction networkBytePack>
+ void
+ compressByAllocN(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut,
+ const __m512i totShiftBits, const int totNumBytesPerRB, const uint16_t rbWriteMask)
+ {
+ switch (dataIn.numBlocks)
+ {
+ case 16:
+ compressN_16RB<networkBytePack>(dataIn, dataOut, totShiftBits, totNumBytesPerRB, rbWriteMask);
+ break;
+
+ case 4:
+ compressN_4RB<networkBytePack>(dataIn, dataOut, totShiftBits, totNumBytesPerRB, rbWriteMask);
+ break;
+
+ case 1:
+ compressN_1RB<networkBytePack>(dataIn, dataOut, totShiftBits, totNumBytesPerRB, rbWriteMask);
+ break;
+ }
+ }
+
+
+ /// Apply compression to 1 RB
+ void
+ applyCompression8_1RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut,
+ const int numREOffset, const uint8_t thisExp, const int thisRBExpAddr)
+ {
+ /// Get AVX512 pointer aligned to desired RB
+ const __m512i* rawDataIn = reinterpret_cast<const __m512i*>(dataIn.dataExpanded + numREOffset);
+ /// Apply the exponent shift
+ const auto compData = _mm512_srai_epi16(*rawDataIn, thisExp);
+ /// Store exponent first
+ dataOut->dataCompressed[thisRBExpAddr] = thisExp;
+ /// Now have 1 RB worth of bytes separated into 3 chunks (1 per lane)
+ /// Use three offset stores to join
+ constexpr uint32_t k_rbMask = 0x00FFFFFF; // Write mask for 1RB (24 values)
+ _mm256_mask_storeu_epi8(dataOut->dataCompressed + thisRBExpAddr + 1, k_rbMask, _mm512_cvtepi16_epi8(compData));
+ }
+
+
+ /// 8bit RB compression loop for 16 RB
+ void
+ compress8_16RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut, const __m512i totShiftBits)
+ {
+ const auto exponents = computeExponent_16RB(dataIn, totShiftBits);
+#pragma unroll(16)
+ for (int n = 0; n < 16; ++n)
+ {
+ applyCompression8_1RB(dataIn, dataOut, n * k_numREReal, ((uint8_t*)&exponents)[n * 4], n * (k_numREReal + 1));
+ }
+ }
+
+
+ /// 8bit RB compression loop for 4 RB
+ void
+ compress8_4RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut, const __m512i totShiftBits)
+ {
+ const auto exponents = computeExponent_4RB(dataIn, totShiftBits);
+#pragma unroll(4)
+ for (int n = 0; n < 4; ++n)
+ {
+ applyCompression8_1RB(dataIn, dataOut, n * k_numREReal, ((uint8_t*)&exponents)[n * 16], n * (k_numREReal + 1));
+ }
+ }
+
+
+ /// 8bit RB compression loop for 4 RB
+ void
+ compress8_1RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut, const __m512i totShiftBits)
+ {
+ const auto thisExponent = computeExponent_1RB(dataIn, totShiftBits);
+ applyCompression8_1RB(dataIn, dataOut, 0, thisExponent, 0);
+ }
+
+
+ /// Calls compression function specific to the number of RB to be executed. For 8 bit iqWidth.
+ 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;
+ }
+ }
+
+
+ /// Apply compression to 1 RB
+ template<BlockFloatCompander::UnpackFunction networkByteUnpack>
+ void
+ applyExpansionN_1RB(const BlockFloatCompander::CompressedData& dataIn, BlockFloatCompander::ExpandedData* dataOut,
+ const int expAddr, const int thisRBAddr, const int maxExpShift)
+ {
+ /// Unpack network order packed data
+ const auto dataUnpacked = networkByteUnpack(dataIn.dataCompressed + expAddr + 1);
+ /// Apply exponent scaling (by appropriate arithmetic shift right)
+ const auto dataExpanded = _mm512_srai_epi16(dataUnpacked, maxExpShift - *(dataIn.dataCompressed + expAddr));
/// Write expanded data to output
- static constexpr uint8_t k_rbMask64 = 0b00111111; // 64b write mask for 1RB (24 int16 values)
- _mm512_mask_storeu_epi64(dataOut->dataExpanded + n * BlockFloatCompander::k_numREReal, k_rbMask64, expData);
+ static constexpr uint32_t k_WriteMask = 0x00FFFFFF;
+ _mm512_mask_storeu_epi16(dataOut->dataExpanded + thisRBAddr, k_WriteMask, dataExpanded);
}
-}
-void
-BlockFloatCompander::BlockFloatCompress_Basic(const ExpandedData& dataIn, CompressedData* dataOut)
-{
- int16_t maxAbs[BlockFloatCompander::k_numRB];
- for (int rb = 0; rb < BlockFloatCompander::k_numRB; ++rb)
+ /// Calls compression function specific to the number of RB to be executed. For 9, 10, or 12bit iqWidth.
+ template<BlockFloatCompander::UnpackFunction networkByteUnpack>
+ void
+ expandByAllocN(const BlockFloatCompander::CompressedData& dataIn, BlockFloatCompander::ExpandedData* dataOut,
+ const int totNumBytesPerRB, const int maxExpShift)
{
- // Find max abs value for this RB
- maxAbs[rb] = 0;
- for (int re = 0; re < BlockFloatCompander::k_numREReal; ++re)
+ switch (dataIn.numBlocks)
{
- auto dataIdx = rb * BlockFloatCompander::k_numREReal + re;
- int16_t dataAbs = (int16_t)std::abs(dataIn.dataExpanded[dataIdx]);
- maxAbs[rb] = std::max(maxAbs[rb], dataAbs);
+ case 16:
+#pragma unroll(16)
+ for (int n = 0; n < 16; ++n)
+ {
+ applyExpansionN_1RB<networkByteUnpack>(dataIn, dataOut, n * totNumBytesPerRB, n * k_numREReal, maxExpShift);
+ }
+ break;
+
+ case 4:
+#pragma unroll(4)
+ for (int n = 0; n < 4; ++n)
+ {
+ applyExpansionN_1RB<networkByteUnpack>(dataIn, dataOut, n * totNumBytesPerRB, n * k_numREReal, maxExpShift);
+ }
+ break;
+
+ case 1:
+ applyExpansionN_1RB<networkByteUnpack>(dataIn, dataOut, 0, 0, maxExpShift);
+ break;
}
+ }
- // Find exponent
- static constexpr int k_expTotShiftBits16 = 16 - BlockFloatCompander::k_iqWidth + 1;
- auto thisExp = (int8_t)(k_expTotShiftBits16 - __lzcnt16(maxAbs[rb]));
- auto expIdx = rb * (BlockFloatCompander::k_numREReal + 1);
- dataOut->dataCompressed[expIdx] = thisExp;
- // ARS data by exponent
- for (int re = 0; re < BlockFloatCompander::k_numREReal; ++re)
+ /// Apply expansion to 1 RB and store
+ void
+ applyExpansion8_1RB(const BlockFloatCompander::CompressedData& dataIn, BlockFloatCompander::ExpandedData* dataOut,
+ const int expAddr, const int thisRBAddr)
+ {
+ const __m256i* rawDataIn = reinterpret_cast<const __m256i*>(dataIn.dataCompressed + expAddr + 1);
+ const auto compData16 = _mm512_cvtepi8_epi16(*rawDataIn);
+ const auto expData = _mm512_slli_epi16(compData16, *(dataIn.dataCompressed + expAddr));
+ constexpr uint8_t k_rbMask64 = 0b00111111; // 64b write mask for 1RB (24 int16 values)
+ _mm512_mask_storeu_epi64(dataOut->dataExpanded + thisRBAddr, k_rbMask64, 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)
+ {
+ switch (dataIn.numBlocks)
{
- auto dataIdxIn = rb * BlockFloatCompander::k_numREReal + re;
- auto dataIdxOut = (expIdx + 1) + re;
- dataOut->dataCompressed[dataIdxOut] = (int8_t)(dataIn.dataExpanded[dataIdxIn] >> thisExp);
+ case 16:
+#pragma unroll(16)
+ for (int n = 0; n < 16; ++n)
+ {
+ applyExpansion8_1RB(dataIn, dataOut, n * (k_numREReal + 1), n * k_numREReal);
+ }
+ break;
+
+ case 4:
+#pragma unroll(4)
+ for (int n = 0; n < 4; ++n)
+ {
+ applyExpansion8_1RB(dataIn, dataOut, n * (k_numREReal + 1), n * k_numREReal);
+ }
+ break;
+
+ case 1:
+ applyExpansion8_1RB(dataIn, dataOut, 0, 0);
+ break;
}
}
}
+
+/// Main kernel function for compression.
+/// Starts by determining iqWidth specific parameters and functions.
+void
+BlockFloatCompander::BFPCompressUserPlaneAvx512(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 compressed bytes per RB for each iqWidth option
+ constexpr int totNumBytesPerRB9 = 28;
+ constexpr int totNumBytesPerRB10 = 31;
+ constexpr int totNumBytesPerRB12 = 37;
+
+ /// 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_UPlane::compressByAlloc8(dataIn, dataOut, totShiftBits8);
+ break;
+
+ case 9:
+ BFP_UPlane::compressByAllocN<BlockFloatCompander::networkBytePack9b>(dataIn, dataOut, totShiftBits9, totNumBytesPerRB9, rbWriteMask9);
+ break;
+
+ case 10:
+ BFP_UPlane::compressByAllocN<BlockFloatCompander::networkBytePack10b>(dataIn, dataOut, totShiftBits10, totNumBytesPerRB10, rbWriteMask10);
+ break;
+
+ case 12:
+ BFP_UPlane::compressByAllocN<BlockFloatCompander::networkBytePack12b>(dataIn, dataOut, totShiftBits12, totNumBytesPerRB12, rbWriteMask12);
+ break;
+ }
+}
+
+
+
+/// Main kernel function for expansion.
+/// Starts by determining iqWidth specific parameters and functions.
void
-BlockFloatCompander::BlockFloatExpand_Basic(const CompressedData& dataIn, ExpandedData* dataOut)
+BlockFloatCompander::BFPExpandUserPlaneAvx512(const CompressedData& dataIn, ExpandedData* dataOut)
{
- // Expand data
- for (int rb = 0; rb < BlockFloatCompander::k_numRB; ++rb)
+ constexpr int k_totNumBytesPerRB9 = 28;
+ constexpr int k_totNumBytesPerRB10 = 31;
+ constexpr int k_totNumBytesPerRB12 = 37;
+
+ constexpr int k_maxExpShift9 = 7;
+ constexpr int k_maxExpShift10 = 6;
+ constexpr int k_maxExpShift12 = 4;
+
+ switch (dataIn.iqWidth)
{
- for (int re = 0; re < BlockFloatCompander::k_numREReal; ++re)
- {
- auto dataIdxOut = rb * BlockFloatCompander::k_numREReal + re;
- auto expIdx = rb * (BlockFloatCompander::k_numREReal + 1);
- auto dataIdxIn = (expIdx + 1) + re;
- auto thisData = (int16_t)dataIn.dataCompressed[dataIdxIn];
- auto thisExp = (int16_t)dataIn.dataCompressed[expIdx];
- dataOut->dataExpanded[dataIdxOut] = (int16_t)(thisData << thisExp);
- }
+ case 8:
+ BFP_UPlane::expandByAlloc8(dataIn, dataOut);
+ break;
+
+ case 9:
+ BFP_UPlane::expandByAllocN<BlockFloatCompander::networkByteUnpack9b>(dataIn, dataOut, k_totNumBytesPerRB9, k_maxExpShift9);
+ break;
+
+ case 10:
+ BFP_UPlane::expandByAllocN<BlockFloatCompander::networkByteUnpack10b>(dataIn, dataOut, k_totNumBytesPerRB10, k_maxExpShift10);
+ break;
+
+ case 12:
+ BFP_UPlane::expandByAllocN<BlockFloatCompander::networkByteUnpack12b>(dataIn, dataOut, k_totNumBytesPerRB12, k_maxExpShift12);
+ break;
}
}
+
+/** callback function type for Symbol packet */
+typedef void (*xran_bfp_compress_fn)(const BlockFloatCompander::ExpandedData& dataIn,
+ BlockFloatCompander::CompressedData* dataOut);
+
+/** callback function type for Symbol packet */
+typedef void (*xran_bfp_decompress_fn)(const BlockFloatCompander::CompressedData& dataIn, BlockFloatCompander::ExpandedData* dataOut);
+
+int32_t
+xranlib_compress_avx512(const struct xranlib_compress_request *request,
+ struct xranlib_compress_response *response)
+{
+ BlockFloatCompander::ExpandedData expandedDataInput;
+ BlockFloatCompander::CompressedData compressedDataOut;
+ xran_bfp_compress_fn com_fn = NULL;
+ uint16_t totalRBs = request->numRBs;
+ uint16_t remRBs = totalRBs;
+ int16_t len = 0;
+ int16_t block_idx_bytes = 0;
+
+ switch (request->iqWidth) {
+ case 8:
+ case 9:
+ case 10:
+ case 12:
+ com_fn = BlockFloatCompander::BFPCompressUserPlaneAvx512;
+ break;
+ default:
+ com_fn = BlockFloatCompander::BFPCompressRef;
+ break;
+ }
+
+ expandedDataInput.iqWidth = request->iqWidth;
+ expandedDataInput.numDataElements = 24;
+
+ while (remRBs){
+ expandedDataInput.dataExpanded = &request->data_in[block_idx_bytes];
+ compressedDataOut.dataCompressed = (uint8_t*)&response->data_out[len];
+ if(remRBs >= 16){
+ expandedDataInput.numBlocks = 16;
+ com_fn(expandedDataInput, &compressedDataOut);
+ len += ((3 * expandedDataInput.iqWidth) + 1) * std::min((int16_t)BlockFloatCompander::k_maxNumBlocks,(int16_t)16);
+ block_idx_bytes += 16*expandedDataInput.numDataElements;
+ remRBs -= 16;
+ }else if(remRBs >= 4){
+ expandedDataInput.numBlocks = 4;
+ com_fn(expandedDataInput, &compressedDataOut);
+ len += ((3 * expandedDataInput.iqWidth) + 1) * std::min((int16_t)BlockFloatCompander::k_maxNumBlocks,(int16_t)4);
+ block_idx_bytes +=4*expandedDataInput.numDataElements;
+ remRBs -=4;
+ }else if (remRBs >= 1){
+ expandedDataInput.numBlocks = 1;
+ com_fn(expandedDataInput, &compressedDataOut);
+ len += ((3 * expandedDataInput.iqWidth) + 1) * std::min((int16_t)BlockFloatCompander::k_maxNumBlocks,(int16_t)1);
+ block_idx_bytes +=1*expandedDataInput.numDataElements;
+ remRBs = remRBs - 1;
+ }
+ }
+
+ response->len = ((3 * expandedDataInput.iqWidth) + 1) * totalRBs;
+
+ return 0;
+}
+
+int32_t
+xranlib_decompress_avx512(const struct xranlib_decompress_request *request,
+ struct xranlib_decompress_response *response)
+{
+ BlockFloatCompander::CompressedData compressedDataInput;
+ BlockFloatCompander::ExpandedData expandedDataOut;
+
+ xran_bfp_decompress_fn decom_fn = NULL;
+ uint16_t totalRBs = request->numRBs;
+ uint16_t remRBs = totalRBs;
+ int16_t len = 0;
+ int16_t block_idx_bytes = 0;
+
+ switch (request->iqWidth) {
+ case 8:
+ case 9:
+ case 10:
+ case 12:
+ decom_fn = BlockFloatCompander::BFPExpandUserPlaneAvx512;
+ break;
+ default:
+ decom_fn = BlockFloatCompander::BFPExpandRef;
+ break;
+ }
+
+ compressedDataInput.iqWidth = request->iqWidth;
+ compressedDataInput.numDataElements = 24;
+
+ while(remRBs) {
+ compressedDataInput.dataCompressed = (uint8_t*)&request->data_in[block_idx_bytes];
+ expandedDataOut.dataExpanded = &response->data_out[len];
+ if(remRBs >= 16){
+ compressedDataInput.numBlocks = 16;
+ decom_fn(compressedDataInput, &expandedDataOut);
+ len += 16*compressedDataInput.numDataElements;
+ block_idx_bytes += ((3 * compressedDataInput.iqWidth) + 1) * std::min((int16_t)BlockFloatCompander::k_maxNumBlocks,(int16_t)16);
+ remRBs -= 16;
+ }else if(remRBs >= 4){
+ compressedDataInput.numBlocks = 4;
+ decom_fn(compressedDataInput, &expandedDataOut);
+ len += 4*compressedDataInput.numDataElements;
+ block_idx_bytes += ((3 * compressedDataInput.iqWidth) + 1) * std::min((int16_t)BlockFloatCompander::k_maxNumBlocks,(int16_t)4);
+ remRBs -=4;
+ }else if (remRBs >= 1){
+ compressedDataInput.numBlocks = 1;
+ decom_fn(compressedDataInput, &expandedDataOut);
+ len += 1*compressedDataInput.numDataElements;
+ block_idx_bytes += ((3 * compressedDataInput.iqWidth) + 1) * std::min((int16_t)BlockFloatCompander::k_maxNumBlocks,(int16_t)1);
+ remRBs = remRBs - 1;
+ }
+ }
+
+ response->len = totalRBs * compressedDataInput.numDataElements * sizeof(int16_t);
+
+ return 0;
+}
+
+int32_t
+xranlib_compress_avx512_bfw(const struct xranlib_compress_request *request,
+ struct xranlib_compress_response *response)
+{
+ BlockFloatCompander::ExpandedData expandedDataInput;
+ BlockFloatCompander::CompressedData compressedDataOut;
+ xran_bfp_compress_fn com_fn = NULL;
+
+ if (request->numRBs != 1){
+ printf("Unsupported numRBs %d\n", request->numRBs);
+ return -1;
+ }
+
+ switch (request->iqWidth) {
+ case 8:
+ case 9:
+ case 10:
+ case 12:
+ switch (request->numDataElements) {
+ case 16:
+ com_fn = BlockFloatCompander::BFPCompressCtrlPlane8Avx512;
+ break;
+ case 32:
+ com_fn = BlockFloatCompander::BFPCompressCtrlPlane16Avx512;
+ break;
+ case 64:
+ com_fn = BlockFloatCompander::BFPCompressCtrlPlane32Avx512;
+ break;
+ case 128:
+ com_fn = BlockFloatCompander::BFPCompressCtrlPlane64Avx512;
+ break;
+ case 24:
+ default:
+ printf("Unsupported numDataElements %d\n", request->numDataElements);
+ return -1;
+ break;
+ }
+ break;
+ default:
+ printf("Unsupported iqWidth %d\n", request->iqWidth);
+ return -1;
+ break;
+ }
+
+ expandedDataInput.iqWidth = request->iqWidth;
+ expandedDataInput.numDataElements = request->numDataElements;
+ expandedDataInput.numBlocks = 1;
+ expandedDataInput.dataExpanded = &request->data_in[0];
+ compressedDataOut.dataCompressed = (uint8_t*)&response->data_out[0];
+
+ com_fn(expandedDataInput, &compressedDataOut);
+
+ response->len = (((expandedDataInput.numDataElements * expandedDataInput.iqWidth) >> 3) + 1)
+ * request->numRBs;
+
+ return 0;
+}
+
+int32_t
+xranlib_decompress_avx512_bfw(const struct xranlib_decompress_request *request,
+ struct xranlib_decompress_response *response)
+{
+ BlockFloatCompander::CompressedData compressedDataInput;
+ BlockFloatCompander::ExpandedData expandedDataOut;
+ xran_bfp_decompress_fn decom_fn = NULL;
+
+ if (request->numRBs != 1){
+ printf("Unsupported numRBs %d\n", request->numRBs);
+ return -1;
+ }
+
+ switch (request->iqWidth) {
+ case 8:
+ case 9:
+ case 10:
+ case 12:
+ switch (request->numDataElements) {
+ case 16:
+ decom_fn = BlockFloatCompander::BFPExpandCtrlPlane8Avx512;
+ break;
+ case 32:
+ decom_fn = BlockFloatCompander::BFPExpandCtrlPlane16Avx512;
+ break;
+ case 64:
+ decom_fn = BlockFloatCompander::BFPExpandCtrlPlane32Avx512;
+ break;
+ case 128:
+ decom_fn = BlockFloatCompander::BFPExpandCtrlPlane64Avx512;
+ break;
+ case 24:
+ default:
+ printf("Unsupported numDataElements %d\n", request->numDataElements);
+ return -1;
+ break;
+ }
+ break;
+ default:
+ printf("Unsupported iqWidth %d\n", request->iqWidth);
+ return -1;
+ break;
+ }
+
+ compressedDataInput.iqWidth = request->iqWidth;
+ compressedDataInput.numDataElements = request->numDataElements;
+ compressedDataInput.numBlocks = 1;
+ compressedDataInput.dataCompressed = (uint8_t*)&request->data_in[0];
+ expandedDataOut.dataExpanded = &response->data_out[0];
+
+ decom_fn(compressedDataInput, &expandedDataOut);
+
+ response->len = request->numRBs * compressedDataInput.numDataElements * sizeof(int16_t);
+
+ return 0;
+}
+
Code Review / o-du / phy.git / blobdiff