X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?p=o-du%2Fphy.git;a=blobdiff_plain;f=fhi_lib%2Flib%2Fsrc%2Fxran_compression.cpp;h=721cbe910c8bc8c010c0b177544796364b52e4eb;hp=6341f4a2174eef15a54c056dc360fa0481515ecb;hb=70d9d920dd4e575f085f1f1a9050fefd1c10e127;hpb=331df2273a6667941167c9bcc141a517369bdf43 diff --git a/fhi_lib/lib/src/xran_compression.cpp b/fhi_lib/lib/src/xran_compression.cpp index 6341f4a..721cbe9 100644 --- a/fhi_lib/lib/src/xran_compression.cpp +++ b/fhi_lib/lib/src/xran_compression.cpp @@ -16,7 +16,16 @@ * *******************************************************************************/ +/** + * @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 #include @@ -24,34 +33,35 @@ #include #include -static int16_t saturateAbs(int16_t inVal) +namespace BFP_UPlane { - int16_t result; - if (inVal == std::numeric_limits::min()) - { - result = std::numeric_limits::max(); - } - else + /// 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) { - result = (int16_t)std::abs(inVal); - } - return result; -} + /// 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); -/// Compute exponent value for a set of RB from the maximum absolute value -void -computeExponent(const BlockFloatCompander::ExpandedData& dataIn, int8_t* expStore) -{ - __m512i maxAbs = __m512i(); + /// 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(dataIn.dataExpanded); - constexpr int k_numRBPerLoop = 4; - constexpr int k_numInputLoopIts = BlockFloatCompander::k_numRB / k_numRBPerLoop; -#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: @@ -64,667 +74,437 @@ computeExponent(const BlockFloatCompander::ExpandedData& dataIn, int8_t* expStor /// [A A A A B B B B C C C C D D D D] constexpr uint8_t k_msk1 = 0b11111100; // Copy first lane of src 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); + const auto z_w1 = _mm512_mask_shuffle_i64x2(inA, k_msk1, inB, inC, k_shuff1); 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(rawData[3 * n + 1], k_msk2, rawData[3 * n + 0], rawData[3 * n + 2], k_shuff2); + const auto z_w2 = _mm512_mask_shuffle_i64x2(inB, k_msk2, inA, inC, k_shuff2); constexpr uint8_t k_msk3 = 0b00111111; // Copy last lane of src 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); + 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); - - /// Perform horizontal max over each lane - /// 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, maxAbs_123); - auto maxAbsHorz = _mm512_max_epi16(maxAbs_123, 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); - 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 - const auto k_select4RB = _mm512_set_epi32(28, 24, 20, 16, 28, 24, 20, 16, - 28, 24, 20, 16, 28, 24, 20, 16); - constexpr uint16_t k_expMsk[k_numInputLoopIts] = { 0x000F, 0x00F0, 0x0F00, 0xF000 }; - maxAbs = _mm512_mask_permutex2var_epi32(maxAbs, k_expMsk[n], k_select4RB, maxAbsHorz); + return _mm512_max_epi16(_mm512_max_epi16(abs16_1, abs16_2), abs16_3); } - /// Convert to 32b by removing repeated values in maxAbs - const auto k_upperWordMask = _mm512_set_epi64(0x0000FFFF0000FFFF, 0x0000FFFF0000FFFF, - 0x0000FFFF0000FFFF, 0x0000FFFF0000FFFF, - 0x0000FFFF0000FFFF, 0x0000FFFF0000FFFF, - 0x0000FFFF0000FFFF, 0x0000FFFF0000FFFF); - maxAbs = _mm512_and_epi64(maxAbs, k_upperWordMask); - - /// Compute and store exponent - const auto totShiftBits = _mm512_set1_epi32(32 - dataIn.iqWidth + 1); - const auto lzCount = _mm512_lzcnt_epi32(maxAbs); - const auto exponent = _mm512_sub_epi32(totShiftBits, lzCount); - constexpr uint16_t k_expWriteMask = 0xFFFF; - _mm512_mask_cvtepi32_storeu_epi8(expStore, k_expWriteMask, exponent); -} - - -/// Pack compressed 9 bit data in network byte order -/// See https://soco.intel.com/docs/DOC-2665619 -__m512i -networkBytePack9b(const __m512i compData) -{ - /// Logical shift left to align network order byte parts - const __m512i k_shiftLeft = _mm512_set_epi64(0x0000000100020003, 0x0004000500060007, - 0x0000000100020003, 0x0004000500060007, - 0x0000000100020003, 0x0004000500060007, - 0x0000000100020003, 0x0004000500060007); - auto compDataPacked = _mm512_sllv_epi16(compData, k_shiftLeft); - - /// First epi8 shuffle of even indexed samples - const __m512i k_byteShuffleMask1 = _mm512_set_epi64(0x0000000000000000, 0x0C0D080904050001, - 0x0000000000000000, 0x0C0D080904050001, - 0x0000000000000000, 0x0C0D080904050001, - 0x0000000000000000, 0x0C0D080904050001); - constexpr uint64_t k_byteMask1 = 0x000000FF00FF00FF; - auto compDataShuff1 = _mm512_maskz_shuffle_epi8(k_byteMask1, compDataPacked, k_byteShuffleMask1); - - /// Second epi8 shuffle of odd indexed samples - const __m512i k_byteShuffleMask2 = _mm512_set_epi64(0x000000000000000E, 0x0F0A0B0607020300, - 0x000000000000000E, 0x0F0A0B0607020300, - 0x000000000000000E, 0x0F0A0B0607020300, - 0x000000000000000E, 0x0F0A0B0607020300); - constexpr uint64_t k_byteMask2 = 0x000001FE01FE01FE; - auto compDataShuff2 = _mm512_maskz_shuffle_epi8(k_byteMask2, compDataPacked, k_byteShuffleMask2); - - /// Ternary blend of the two shuffled results - const __m512i k_ternLogSelect = _mm512_set_epi64(0x00000000000000FF, 0x01FC07F01FC07F00, - 0x00000000000000FF, 0x01FC07F01FC07F00, - 0x00000000000000FF, 0x01FC07F01FC07F00, - 0x00000000000000FF, 0x01FC07F01FC07F00); - return _mm512_ternarylogic_epi64(compDataShuff1, compDataShuff2, k_ternLogSelect, 0xd8); -} - - -/// Pack compressed 10 bit data in network byte order -/// See https://soco.intel.com/docs/DOC-2665619 -__m512i -networkBytePack10b(const __m512i compData) -{ - /// Logical shift left to align network order byte parts - const __m512i k_shiftLeft = _mm512_set_epi64(0x0000000200040006, 0x0000000200040006, - 0x0000000200040006, 0x0000000200040006, - 0x0000000200040006, 0x0000000200040006, - 0x0000000200040006, 0x0000000200040006); - auto compDataPacked = _mm512_sllv_epi16(compData, k_shiftLeft); - - /// First epi8 shuffle of even indexed samples - const __m512i k_byteShuffleMask1 = _mm512_set_epi64(0x000000000000000C, 0x0D08090004050001, - 0x000000000000000C, 0x0D08090004050001, - 0x000000000000000C, 0x0D08090004050001, - 0x000000000000000C, 0x0D08090004050001); - constexpr uint64_t k_byteMask1 = 0x000001EF01EF01EF; - auto compDataShuff1 = _mm512_maskz_shuffle_epi8(k_byteMask1, compDataPacked, k_byteShuffleMask1); - - /// Second epi8 shuffle of odd indexed samples - const __m512i k_byteShuffleMask2 = _mm512_set_epi64(0x0000000000000E0F, 0x0A0B000607020300, - 0x0000000000000E0F, 0x0A0B000607020300, - 0x0000000000000E0F, 0x0A0B000607020300, - 0x0000000000000E0F, 0x0A0B000607020300); - constexpr uint64_t k_byteMask2 = 0x000003DE03DE03DE; - auto compDataShuff2 = _mm512_maskz_shuffle_epi8(k_byteMask2, compDataPacked, k_byteShuffleMask2); - - /// Ternary blend of the two shuffled results - const __m512i k_ternLogSelect = _mm512_set_epi64(0x000000000000FF03, 0xF03F00FF03F03F00, - 0x000000000000FF03, 0xF03F00FF03F03F00, - 0x000000000000FF03, 0xF03F00FF03F03F00, - 0x000000000000FF03, 0xF03F00FF03F03F00); - return _mm512_ternarylogic_epi64(compDataShuff1, compDataShuff2, k_ternLogSelect, 0xd8); -} - - -/// Pack compressed 12 bit data in network byte order -/// See https://soco.intel.com/docs/DOC-2665619 -__m512i -networkBytePack12b(const __m512i compData) -{ - /// Logical shift left to align network order byte parts - const __m512i k_shiftLeft = _mm512_set_epi64(0x0000000400000004, 0x0000000400000004, - 0x0000000400000004, 0x0000000400000004, - 0x0000000400000004, 0x0000000400000004, - 0x0000000400000004, 0x0000000400000004); - auto compDataPacked = _mm512_sllv_epi16(compData, k_shiftLeft); - - /// First epi8 shuffle of even indexed samples - const __m512i k_byteShuffleMask1 = _mm512_set_epi64(0x00000000000C0D00, 0x0809000405000001, - 0x00000000000C0D00, 0x0809000405000001, - 0x00000000000C0D00, 0x0809000405000001, - 0x00000000000C0D00, 0x0809000405000001); - constexpr uint64_t k_byteMask1 = 0x000006DB06DB06DB; - auto compDataShuff1 = _mm512_maskz_shuffle_epi8(k_byteMask1, compDataPacked, k_byteShuffleMask1); - - /// Second epi8 shuffle of odd indexed samples - const __m512i k_byteShuffleMask2 = _mm512_set_epi64(0x000000000E0F000A, 0x0B00060700020300, - 0x000000000E0F000A, 0x0B00060700020300, - 0x000000000E0F000A, 0x0B00060700020300, - 0x000000000E0F000A, 0x0B00060700020300); - constexpr uint64_t k_byteMask2 = 0x00000DB60DB60DB6; - auto compDataShuff2 = _mm512_maskz_shuffle_epi8(k_byteMask2, compDataPacked, k_byteShuffleMask2); - - /// Ternary blend of the two shuffled results - const __m512i k_ternLogSelect = _mm512_set_epi64(0x00000000FF0F00FF, 0x0F00FF0F00FF0F00, - 0x00000000FF0F00FF, 0x0F00FF0F00FF0F00, - 0x00000000FF0F00FF, 0x0F00FF0F00FF0F00, - 0x00000000FF0F00FF, 0x0F00FF0F00FF0F00); - return _mm512_ternarylogic_epi64(compDataShuff1, compDataShuff2, k_ternLogSelect, 0xd8); -} - - -/// Unpack compressed 9 bit data in network byte order -/// See https://soco.intel.com/docs/DOC-2665619 -__m512i -networkByteUnpack9b(const uint8_t* inData) -{ - /// Align chunks of compressed bytes into lanes to allow for expansion - const __m512i* rawDataIn = reinterpret_cast(inData); - const auto k_expPerm = _mm512_set_epi32(15, 14, 13, 12, 7, 6, 5, 4, - 5, 4, 3, 2, 3, 2, 1, 0); - auto expData = _mm512_permutexvar_epi32(k_expPerm, *rawDataIn); - - /// Byte shuffle to get all bits for each sample into 16b chunks - /// Due to previous permute to get chunks of bytes into each lane, there is - /// a different shuffle offset in each lane - const __m512i k_byteShuffleMask = _mm512_set_epi64(0x0F0E0D0C0B0A0908, 0x0706050403020100, - 0x090A080907080607, 0x0506040503040203, - 0x0809070806070506, 0x0405030402030102, - 0x0708060705060405, 0x0304020301020001); - expData = _mm512_shuffle_epi8(expData, k_byteShuffleMask); - - /// Logical shift left to set sign bit - const __m512i k_slBits = _mm512_set_epi64(0x0007000600050004, 0x0003000200010000, - 0x0007000600050004, 0x0003000200010000, - 0x0007000600050004, 0x0003000200010000, - 0x0007000600050004, 0x0003000200010000); - expData = _mm512_sllv_epi16(expData, k_slBits); - - /// Mask to zero unwanted bits - const __m512i k_expMask = _mm512_set1_epi16(0xFF80); - return _mm512_and_epi64(expData, k_expMask); -} + /// 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); + } -/// Unpack compressed 10 bit data in network byte order -/// See https://soco.intel.com/docs/DOC-2665619 -__m512i -networkByteUnpack10b(const uint8_t* inData) -{ - /// Align chunks of compressed bytes into lanes to allow for expansion - const __m512i* rawDataIn = reinterpret_cast(inData); - const auto k_expPerm = _mm512_set_epi32(15, 14, 13, 12, 8, 7, 6, 5, - 5, 4, 3, 2, 3, 2, 1, 0); - auto expData = _mm512_permutexvar_epi32(k_expPerm, *rawDataIn); - - /// Byte shuffle to get all bits for each sample into 16b chunks - /// Due to previous permute to get chunks of bytes into each lane, lanes - /// 0 and 2 happen to be aligned, but lane 1 is offset by 2 bytes - const __m512i k_byteShuffleMask = _mm512_set_epi64(0x0809070806070506, 0x0304020301020001, - 0x0809070806070506, 0x0304020301020001, - 0x0A0B090A08090708, 0x0506040503040203, - 0x0809070806070506, 0x0304020301020001); - expData = _mm512_shuffle_epi8(expData, k_byteShuffleMask); - - /// Logical shift left to set sign bit - const __m512i k_slBits = _mm512_set_epi64(0x0006000400020000, 0x0006000400020000, - 0x0006000400020000, 0x0006000400020000, - 0x0006000400020000, 0x0006000400020000, - 0x0006000400020000, 0x0006000400020000); - expData = _mm512_sllv_epi16(expData, k_slBits); - - /// Mask to zero unwanted bits - const __m512i k_expMask = _mm512_set1_epi16(0xFFC0); - return _mm512_and_epi64(expData, k_expMask); -} + /// 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(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); + } -/// Unpack compressed 12 bit data in network byte order -/// See https://soco.intel.com/docs/DOC-2665619 -__m512i -networkByteUnpack12b(const uint8_t* inData) -{ - /// Align chunks of compressed bytes into lanes to allow for expansion - const __m512i* rawDataIn = reinterpret_cast(inData); - const auto k_expPerm = _mm512_set_epi32(15, 14, 13, 12, 9, 8, 7, 6, - 6, 5, 4, 3, 3, 2, 1, 0); - auto expData = _mm512_permutexvar_epi32(k_expPerm, *rawDataIn); - - /// Byte shuffle to get all bits for each sample into 16b chunks - /// For 12b mantissa all lanes post-permute are aligned and require same shuffle offset - const __m512i k_byteShuffleMask = _mm512_set_epi64(0x0A0B090A07080607, 0x0405030401020001, - 0x0A0B090A07080607, 0x0405030401020001, - 0x0A0B090A07080607, 0x0405030401020001, - 0x0A0B090A07080607, 0x0405030401020001); - expData = _mm512_shuffle_epi8(expData, k_byteShuffleMask); - - /// Logical shift left to set sign bit - const __m512i k_slBits = _mm512_set_epi64(0x0004000000040000, 0x0004000000040000, - 0x0004000000040000, 0x0004000000040000, - 0x0004000000040000, 0x0004000000040000, - 0x0004000000040000, 0x0004000000040000); - expData = _mm512_sllv_epi16(expData, k_slBits); - - /// Mask to zero unwanted bits - const __m512i k_expMask = _mm512_set1_epi16(0xFFF0); - return _mm512_and_epi64(expData, k_expMask); -} + /// 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) + { + const __m512i* rawData = reinterpret_cast(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); + } -/// 8 bit compression -void -BlockFloatCompander::BlockFloatCompress_8b_AVX512(const ExpandedData& dataIn, CompressedData* dataOut) -{ - /// Compute exponent and store for later use - int8_t storedExp[BlockFloatCompander::k_numRB] = {}; - computeExponent(dataIn, storedExp); - /// Shift 1RB by corresponding exponent and write exponent and data to output -#pragma unroll(BlockFloatCompander::k_numRB) - for (int n = 0; n < BlockFloatCompander::k_numRB; ++n) + /// 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* rawDataIn = reinterpret_cast(dataIn.dataExpanded + n * BlockFloatCompander::k_numREReal); - auto compData = _mm512_srai_epi16(*rawDataIn, storedExp[n]); - auto thisRBExpAddr = n * (BlockFloatCompander::k_numREReal + 1); - /// Store exponent first - dataOut->dataCompressed[thisRBExpAddr] = storedExp[n]; - /// Store compressed RB - 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)); + const __m512i* rawData = reinterpret_cast(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); } -} -/// 9 bit compression -void -BlockFloatCompander::BlockFloatCompress_9b_AVX512(const ExpandedData& dataIn, CompressedData* dataOut) -{ - /// Compute exponent and store for later use - int8_t storedExp[BlockFloatCompander::k_numRB] = {}; - computeExponent(dataIn, storedExp); - - /// 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) + /// Apply compression to 1 RB + template + void + applyCompressionN_1RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut, + const int numREOffset, const uint8_t thisExp, const int thisRBExpAddr, const uint16_t rbWriteMask) { - /// Apply exponent shift - const __m512i* rawDataIn = reinterpret_cast(dataIn.dataExpanded + n * BlockFloatCompander::k_numREReal); - auto compData = _mm512_srai_epi16(*rawDataIn, storedExp[n]); - + /// Get AVX512 pointer aligned to desired RB + const __m512i* rawDataIn = reinterpret_cast(dataIn.dataExpanded + numREOffset); + /// Apply the exponent shift + const auto compData = _mm512_srai_epi16(*rawDataIn, thisExp); /// Pack compressed data network byte order - auto compDataBytePacked = networkBytePack9b(compData); - + const auto compDataBytePacked = networkBytePack(compData); /// Store exponent first - constexpr int k_totNumBytesPerRB = 28; - auto thisRBExpAddr = n * k_totNumBytesPerRB; - dataOut->dataCompressed[thisRBExpAddr] = storedExp[n]; - + 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 uint16_t k_RbWriteMask = 0x01FF; - constexpr int k_numDataBytesPerLane = 9; - _mm_mask_storeu_epi8(dataOut->dataCompressed + thisRBExpAddr + 1, k_RbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 0)); - _mm_mask_storeu_epi8(dataOut->dataCompressed + thisRBExpAddr + 1 + k_numDataBytesPerLane, k_RbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 1)); - _mm_mask_storeu_epi8(dataOut->dataCompressed + thisRBExpAddr + 1 + (2 * k_numDataBytesPerLane), k_RbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 2)); + _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)); } -} -/// 10 bit compression -void -BlockFloatCompander::BlockFloatCompress_10b_AVX512(const ExpandedData& dataIn, CompressedData* dataOut) -{ - /// Compute exponent and store for later use - int8_t storedExp[BlockFloatCompander::k_numRB] = {}; - computeExponent(dataIn, storedExp); - - /// 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) + /// Apply 9, 10, or 12bit compression to 16 RB + template + void + compressN_16RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut, + const __m512i totShiftBits, const int totNumBytesPerRB, const uint16_t rbWriteMask) { - /// Apply exponent shift - const __m512i* rawDataIn = reinterpret_cast(dataIn.dataExpanded + n * BlockFloatCompander::k_numREReal); - auto compData = _mm512_srai_epi16(*rawDataIn, storedExp[n]); + const auto exponents = computeExponent_16RB(dataIn, totShiftBits); +#pragma unroll(16) + for (int n = 0; n < 16; ++n) + { + applyCompressionN_1RB(dataIn, dataOut, n * k_numREReal, ((uint8_t*)&exponents)[n * 4], n * totNumBytesPerRB, rbWriteMask); + } + } - /// Pack compressed data network byte order - auto compDataBytePacked = networkBytePack10b(compData); - /// Store exponent first - constexpr int k_totNumBytesPerRB = 31; - auto thisRBExpAddr = n * k_totNumBytesPerRB; - dataOut->dataCompressed[thisRBExpAddr] = storedExp[n]; + /// Apply 9, 10, or 12bit compression to 4 RB + template + 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(dataIn, dataOut, n * k_numREReal, ((uint8_t*)&exponents)[n * 16], n * totNumBytesPerRB, rbWriteMask); + } + } - /// Now have 1 RB worth of bytes separated into 3 chunks (1 per lane) - /// Use three offset stores to join - constexpr uint16_t k_RbWriteMask = 0x03FF; - constexpr int k_numDataBytesPerLane = 10; - _mm_mask_storeu_epi8(dataOut->dataCompressed + thisRBExpAddr + 1, k_RbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 0)); - _mm_mask_storeu_epi8(dataOut->dataCompressed + thisRBExpAddr + 1 + k_numDataBytesPerLane, k_RbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 1)); - _mm_mask_storeu_epi8(dataOut->dataCompressed + thisRBExpAddr + 1 + (2 * k_numDataBytesPerLane), k_RbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 2)); + + /// Apply 9, 10, or 12bit compression to 1 RB + template + 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(dataIn, dataOut, 0, thisExponent, 0, rbWriteMask); } -} -/// 12 bit compression -void -BlockFloatCompander::BlockFloatCompress_12b_AVX512(const ExpandedData& dataIn, CompressedData* dataOut) -{ - /// Compute exponent and store for later use - int8_t storedExp[BlockFloatCompander::k_numRB] = {}; - computeExponent(dataIn, storedExp); - - /// 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) + /// Calls compression function specific to the number of RB to be executed. For 9, 10, or 12bit iqWidth. + template + void + compressByAllocN(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut, + const __m512i totShiftBits, const int totNumBytesPerRB, const uint16_t rbWriteMask) { - /// Apply exponent shift - const __m512i* rawDataIn = reinterpret_cast(dataIn.dataExpanded + n * BlockFloatCompander::k_numREReal); - auto compData = _mm512_srai_epi16(*rawDataIn, storedExp[n]); + switch (dataIn.numBlocks) + { + case 16: + compressN_16RB(dataIn, dataOut, totShiftBits, totNumBytesPerRB, rbWriteMask); + break; - /// Pack compressed data network byte order - auto compDataBytePacked = networkBytePack12b(compData); + case 4: + compressN_4RB(dataIn, dataOut, totShiftBits, totNumBytesPerRB, rbWriteMask); + break; - /// Store exponent first - constexpr int k_totNumBytesPerRB = 37; - auto thisRBExpAddr = n * k_totNumBytesPerRB; - dataOut->dataCompressed[thisRBExpAddr] = storedExp[n]; + case 1: + compressN_1RB(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(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 uint16_t k_RbWriteMask = 0x0FFF; - constexpr int k_numDataBytesPerLane = 12; - _mm_mask_storeu_epi8(dataOut->dataCompressed + thisRBExpAddr + 1, k_RbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 0)); - _mm_mask_storeu_epi8(dataOut->dataCompressed + thisRBExpAddr + 1 + k_numDataBytesPerLane, k_RbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 1)); - _mm_mask_storeu_epi8(dataOut->dataCompressed + thisRBExpAddr + 1 + (2 * k_numDataBytesPerLane), k_RbWriteMask, _mm512_extracti64x2_epi64(compDataBytePacked, 2)); + 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)); } -} -/// 8 bit expansion -void -BlockFloatCompander::BlockFloatExpand_8b_AVX512(const CompressedData& dataIn, ExpandedData* dataOut) -{ -#pragma unroll(BlockFloatCompander::k_numRB) - for (int n = 0; n < BlockFloatCompander::k_numRB; ++n) + /// 8bit RB compression loop for 16 RB + void + compress8_16RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut, const __m512i totShiftBits) { - /// Expand 1RB of data - auto expAddr = n * (BlockFloatCompander::k_numREReal + 1); - const __m256i* rawDataIn = reinterpret_cast(dataIn.dataCompressed + expAddr + 1); - const auto compData16 = _mm512_cvtepi8_epi16(*rawDataIn); - const auto expData = _mm512_slli_epi16(compData16, *(dataIn.dataCompressed + expAddr)); - /// Write expanded data to output - 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); + 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)); + } } -} -/// 9 bit expansion -void -BlockFloatCompander::BlockFloatExpand_9b_AVX512(const CompressedData& dataIn, ExpandedData* dataOut) -{ -#pragma unroll(BlockFloatCompander::k_numRB) - for (int n = 0; n < BlockFloatCompander::k_numRB; ++n) + /// 8bit RB compression loop for 4 RB + void + compress8_4RB(const BlockFloatCompander::ExpandedData& dataIn, BlockFloatCompander::CompressedData* dataOut, const __m512i totShiftBits) { - constexpr int k_totNumBytesPerRB = 28; - auto expAddr = n * k_totNumBytesPerRB; - - /// Unpack network order packed data - auto expData = networkByteUnpack9b(dataIn.dataCompressed + expAddr + 1); + 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)); + } + } - /// Apply exponent scaling (by appropriate arithmetic shift right) - constexpr int k_maxExpShift = 7; - expData = _mm512_srai_epi16(expData, k_maxExpShift - *(dataIn.dataCompressed + expAddr)); - /// Write expanded data to output - static constexpr uint32_t k_WriteMask = 0x00FFFFFF; - _mm512_mask_storeu_epi16(dataOut->dataExpanded + n * BlockFloatCompander::k_numREReal, k_WriteMask, expData); + /// 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); } -} -/// 10 bit expansion -void -BlockFloatCompander::BlockFloatExpand_10b_AVX512(const CompressedData& dataIn, ExpandedData* dataOut) -{ -#pragma unroll(BlockFloatCompander::k_numRB) - for (int n = 0; n < BlockFloatCompander::k_numRB; ++n) + /// 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) { - constexpr int k_totNumBytesPerRB = 31; - auto expAddr = n * k_totNumBytesPerRB; - - /// Unpack network order packed data - auto expData = networkByteUnpack10b(dataIn.dataCompressed + expAddr + 1); + switch (dataIn.numBlocks) + { + case 16: + compress8_16RB(dataIn, dataOut, totShiftBits); + break; - /// Apply exponent scaling (by appropriate arithmetic shift right) - constexpr int k_maxExpShift = 6; - expData = _mm512_srai_epi16(expData, k_maxExpShift - *(dataIn.dataCompressed + expAddr)); + case 4: + compress8_4RB(dataIn, dataOut, totShiftBits); + break; - /// Write expanded data to output - static constexpr uint32_t k_WriteMask = 0x00FFFFFF; - _mm512_mask_storeu_epi16(dataOut->dataExpanded + n * BlockFloatCompander::k_numREReal, k_WriteMask, expData); + case 1: + compress8_1RB(dataIn, dataOut, totShiftBits); + break; + } } -} -/// 12 bit expansion -void -BlockFloatCompander::BlockFloatExpand_12b_AVX512(const CompressedData& dataIn, ExpandedData* dataOut) -{ -#pragma unroll(BlockFloatCompander::k_numRB) - for (int n = 0; n < BlockFloatCompander::k_numRB; ++n) + /// Apply compression to 1 RB + template + void + applyExpansionN_1RB(const BlockFloatCompander::CompressedData& dataIn, BlockFloatCompander::ExpandedData* dataOut, + const int expAddr, const int thisRBAddr, const int maxExpShift) { - constexpr int k_totNumBytesPerRB = 37; - auto expAddr = n * k_totNumBytesPerRB; - /// Unpack network order packed data - auto expData = networkByteUnpack12b(dataIn.dataCompressed + expAddr + 1); - + const auto dataUnpacked = networkByteUnpack(dataIn.dataCompressed + expAddr + 1); /// Apply exponent scaling (by appropriate arithmetic shift right) - constexpr int k_maxExpShift = 4; - expData = _mm512_srai_epi16(expData, k_maxExpShift - *(dataIn.dataCompressed + expAddr)); - + const auto dataExpanded = _mm512_srai_epi16(dataUnpacked, maxExpShift - *(dataIn.dataCompressed + expAddr)); /// Write expanded data to output static constexpr uint32_t k_WriteMask = 0x00FFFFFF; - _mm512_mask_storeu_epi16(dataOut->dataExpanded + n * BlockFloatCompander::k_numREReal, k_WriteMask, expData); + _mm512_mask_storeu_epi16(dataOut->dataExpanded + thisRBAddr, k_WriteMask, dataExpanded); } -} -/// Reference compression -void -BlockFloatCompander::BlockFloatCompress_Basic(const ExpandedData& dataIn, CompressedData* dataOut) -{ - int dataOutIdx = 0; - int16_t iqMask = (int16_t)((1 << dataIn.iqWidth) - 1); - int byteShiftUnits = dataIn.iqWidth - 8; - - 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 + void + expandByAllocN(const BlockFloatCompander::CompressedData& dataIn, BlockFloatCompander::ExpandedData* dataOut, + const int totNumBytesPerRB, const int maxExpShift) { - /// Find max abs value for this RB - int16_t maxAbs = 0; - for (int re = 0; re < BlockFloatCompander::k_numREReal; ++re) - { - auto dataIdx = rb * BlockFloatCompander::k_numREReal + re; - auto dataAbs = saturateAbs(dataIn.dataExpanded[dataIdx]); - maxAbs = std::max(maxAbs, dataAbs); - } - - // Find exponent and insert into byte stream - auto thisExp = (uint8_t)(std::max(0,(16 - dataIn.iqWidth + 1 - __lzcnt16(maxAbs)))); - dataOut->dataCompressed[dataOutIdx++] = thisExp; - - /// ARS data by exponent and pack bytes in Network order - /// This uses a sliding buffer where one or more bytes are - /// extracted after the insertion of each compressed sample - static constexpr int k_byteMask = 0xFF; - int byteShiftVal = -8; - int byteBuffer = { 0 }; - for (int re = 0; re < BlockFloatCompander::k_numREReal; ++re) + switch (dataIn.numBlocks) { - auto dataIdxIn = rb * BlockFloatCompander::k_numREReal + re; - auto thisRE = dataIn.dataExpanded[dataIdxIn] >> thisExp; - byteBuffer = (byteBuffer << dataIn.iqWidth) + (int)(thisRE & iqMask); + case 16: +#pragma unroll(16) + for (int n = 0; n < 16; ++n) + { + applyExpansionN_1RB(dataIn, dataOut, n * totNumBytesPerRB, n * k_numREReal, maxExpShift); + } + break; - byteShiftVal += (8 + byteShiftUnits); - while (byteShiftVal >= 0) + case 4: +#pragma unroll(4) + for (int n = 0; n < 4; ++n) { - auto thisByte = (uint8_t)((byteBuffer >> byteShiftVal) & k_byteMask); - dataOut->dataCompressed[dataOutIdx++] = thisByte; - byteShiftVal -= 8; + applyExpansionN_1RB(dataIn, dataOut, n * totNumBytesPerRB, n * k_numREReal, maxExpShift); } + break; + + case 1: + applyExpansionN_1RB(dataIn, dataOut, 0, 0, maxExpShift); + break; } } - dataOut->iqWidth = dataIn.iqWidth; -} -/// Reference expansion -void -BlockFloatCompander::BlockFloatExpand_Basic(const CompressedData& dataIn, ExpandedData* dataOut) -{ - uint32_t iqMask = (uint32_t)(UINT_MAX - ((1 << (32 - dataIn.iqWidth)) - 1)); - uint32_t byteBuffer = { 0 }; - int numBytesPerRB = (3 * dataIn.iqWidth) + 1; - int bitPointer = 0; - int dataIdxOut = 0; - for (int rb = 0; rb < BlockFloatCompander::k_numRB; ++rb) + /// Apply expansion to 1 RB and store + void + applyExpansion8_1RB(const BlockFloatCompander::CompressedData& dataIn, BlockFloatCompander::ExpandedData* dataOut, + const int expAddr, const int thisRBAddr) { - auto expIdx = rb * numBytesPerRB; - auto signExtShift = 32 - dataIn.iqWidth - dataIn.dataCompressed[expIdx]; + const __m256i* rawDataIn = reinterpret_cast(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); + } - for (int b = 0; b < numBytesPerRB - 1; ++b) + + /// 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 = (expIdx + 1) + b; - auto thisByte = (uint16_t)dataIn.dataCompressed[dataIdxIn]; - byteBuffer = (uint32_t)((byteBuffer << 8) + thisByte); - bitPointer += 8; - while (bitPointer >= dataIn.iqWidth) + case 16: +#pragma unroll(16) + for (int n = 0; n < 16; ++n) { - /// byteBuffer currently has enough data in it to extract a sample - /// Shift left first to set sign bit at MSB, then shift right to - /// sign extend down to iqWidth. Finally recast to int16. - int32_t thisSample32 = (int32_t)((byteBuffer << (32 - bitPointer)) & iqMask); - int16_t thisSample = (int16_t)(thisSample32 >> signExtShift); - bitPointer -= dataIn.iqWidth; - dataOut->dataExpanded[dataIdxOut++] = thisSample; + 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; } } } -/// Reference compression + + +/// Main kernel function for compression. +/// Starts by determining iqWidth specific parameters and functions. void -BlockFloatCompanderBFW::BlockFloatCompress_Basic(const BlockFloatCompanderBFW::ExpandedData& dataIn, BlockFloatCompanderBFW::CompressedData* dataOut) +BlockFloatCompander::BFPCompressUserPlaneAvx512(const ExpandedData& dataIn, CompressedData* dataOut) { - int dataOutIdx = 0; - int16_t iqMask = (int16_t)((1 << dataIn.iqWidth) - 1); - int byteShiftUnits = dataIn.iqWidth - 8; - - for (int rb = 0; rb < BlockFloatCompanderBFW::k_numRB; ++rb) + /// 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) { - /// Find max abs value for this RB - int16_t maxAbs = 0; - for (int re = 0; re < BlockFloatCompanderBFW::k_numREReal; ++re) - { - auto dataIdx = rb * BlockFloatCompanderBFW::k_numREReal + re; - auto dataAbs = saturateAbs(dataIn.dataExpanded[dataIdx]); - maxAbs = std::max(maxAbs, dataAbs); - } + case 8: + BFP_UPlane::compressByAlloc8(dataIn, dataOut, totShiftBits8); + break; - // Find exponent and insert into byte stream - auto thisExp = (uint8_t)(std::max(0,(16 - dataIn.iqWidth + 1 - __lzcnt16(maxAbs)))); - dataOut->dataCompressed[dataOutIdx++] = thisExp; - - /// ARS data by exponent and pack bytes in Network order - /// This uses a sliding buffer where one or more bytes are - /// extracted after the insertion of each compressed sample - static constexpr int k_byteMask = 0xFF; - int byteShiftVal = -8; - int byteBuffer = { 0 }; - for (int re = 0; re < BlockFloatCompanderBFW::k_numREReal; ++re) - { - auto dataIdxIn = rb * BlockFloatCompanderBFW::k_numREReal + re; - auto thisRE = dataIn.dataExpanded[dataIdxIn] >> thisExp; - byteBuffer = (byteBuffer << dataIn.iqWidth) + (int)(thisRE & iqMask); + case 9: + BFP_UPlane::compressByAllocN(dataIn, dataOut, totShiftBits9, totNumBytesPerRB9, rbWriteMask9); + break; - byteShiftVal += (8 + byteShiftUnits); - while (byteShiftVal >= 0) - { - auto thisByte = (uint8_t)((byteBuffer >> byteShiftVal) & k_byteMask); - dataOut->dataCompressed[dataOutIdx++] = thisByte; - byteShiftVal -= 8; - } - } + case 10: + BFP_UPlane::compressByAllocN(dataIn, dataOut, totShiftBits10, totNumBytesPerRB10, rbWriteMask10); + break; + + case 12: + BFP_UPlane::compressByAllocN(dataIn, dataOut, totShiftBits12, totNumBytesPerRB12, rbWriteMask12); + break; } - dataOut->iqWidth = dataIn.iqWidth; } -/// Reference expansion + + +/// Main kernel function for expansion. +/// Starts by determining iqWidth specific parameters and functions. void -BlockFloatCompanderBFW::BlockFloatExpand_Basic(const BlockFloatCompanderBFW::CompressedData& dataIn, BlockFloatCompanderBFW::ExpandedData* dataOut) +BlockFloatCompander::BFPExpandUserPlaneAvx512(const CompressedData& dataIn, ExpandedData* dataOut) { - uint32_t iqMask = (uint32_t)(UINT_MAX - ((1 << (32 - dataIn.iqWidth)) - 1)); - uint32_t byteBuffer = { 0 }; - int numBytesPerRB = (3 * dataIn.iqWidth) + 1; - int bitPointer = 0; - int dataIdxOut = 0; + 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; - for (int rb = 0; rb < BlockFloatCompanderBFW::k_numRB; ++rb) + switch (dataIn.iqWidth) { - auto expIdx = rb * numBytesPerRB; - auto signExtShift = 32 - dataIn.iqWidth - dataIn.dataCompressed[expIdx]; + case 8: + BFP_UPlane::expandByAlloc8(dataIn, dataOut); + break; - for (int b = 0; b < numBytesPerRB - 1; ++b) - { - auto dataIdxIn = (expIdx + 1) + b; - auto thisByte = (uint16_t)dataIn.dataCompressed[dataIdxIn]; - byteBuffer = (uint32_t)((byteBuffer << 8) + thisByte); - bitPointer += 8; - while (bitPointer >= dataIn.iqWidth) - { - /// byteBuffer currently has enough data in it to extract a sample - /// Shift left first to set sign bit at MSB, then shift right to - /// sign extend down to iqWidth. Finally recast to int16. - int32_t thisSample32 = (int32_t)((byteBuffer << (32 - bitPointer)) & iqMask); - int16_t thisSample = (int16_t)(thisSample32 >> signExtShift); - bitPointer -= dataIn.iqWidth; - dataOut->dataExpanded[dataIdxOut++] = thisSample; - } - } - } -} + case 9: + BFP_UPlane::expandByAllocN(dataIn, dataOut, k_totNumBytesPerRB9, k_maxExpShift9); + break; -#define RB_NUM_ROUNDUP(rb) \ - (BlockFloatCompander::k_numRB * ((rb + BlockFloatCompander::k_numRB - 1) / BlockFloatCompander::k_numRB)) + case 10: + BFP_UPlane::expandByAllocN(dataIn, dataOut, k_totNumBytesPerRB10, k_maxExpShift10); + break; + case 12: + BFP_UPlane::expandByAllocN(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) @@ -732,151 +512,224 @@ xranlib_compress_avx512(const struct xranlib_compress_request *request, BlockFloatCompander::ExpandedData expandedDataInput; BlockFloatCompander::CompressedData compressedDataOut; xran_bfp_compress_fn com_fn = NULL; - int16_t numRBs = request->numRBs; + uint16_t totalRBs = request->numRBs; + uint16_t remRBs = totalRBs; int16_t len = 0; + int16_t block_idx_bytes = 0; - switch (request->iqWidth){ + switch (request->iqWidth) { case 8: - expandedDataInput.iqWidth = 8; - com_fn = BlockFloatCompander::BlockFloatCompress_8b_AVX512; - break; case 9: - expandedDataInput.iqWidth = 9; - com_fn = BlockFloatCompander::BlockFloatCompress_9b_AVX512; - break; case 10: - expandedDataInput.iqWidth = 10; - com_fn = BlockFloatCompander::BlockFloatCompress_10b_AVX512; - break; case 12: - expandedDataInput.iqWidth = 12; - com_fn = BlockFloatCompander::BlockFloatCompress_12b_AVX512; + com_fn = BlockFloatCompander::BFPCompressUserPlaneAvx512; break; default: - expandedDataInput.iqWidth = request->iqWidth; - com_fn = BlockFloatCompander::BlockFloatCompress_Basic; + com_fn = BlockFloatCompander::BFPCompressRef; break; } - for (int16_t block_idx = 0; - block_idx < RB_NUM_ROUNDUP(numRBs)/BlockFloatCompander::k_numRB /*+ 1*/; /* 16 RBs at time */ - block_idx++) { + 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; - expandedDataInput.dataExpanded = - &request->data_in[block_idx*BlockFloatCompander::k_numSampsExpanded]; - compressedDataOut.dataCompressed = - (uint8_t*)&response->data_out[len]; + 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; + } - com_fn(expandedDataInput, &compressedDataOut); - len += ((3 * expandedDataInput.iqWidth) + 1) * std::min((int16_t)BlockFloatCompander::k_numRB,(int16_t)numRBs); + 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 = ((3 * expandedDataInput.iqWidth) + 1) * numRBs; + response->len = totalRBs * compressedDataInput.numDataElements * sizeof(int16_t); return 0; } -/** callback function type for Symbol packet */ -typedef void (*xran_bfp_compress_bfw_fn)(const BlockFloatCompanderBFW::ExpandedData& dataIn, BlockFloatCompanderBFW::CompressedData* dataOut); - int32_t xranlib_compress_avx512_bfw(const struct xranlib_compress_request *request, struct xranlib_compress_response *response) { - BlockFloatCompanderBFW::ExpandedData expandedDataInput; - BlockFloatCompanderBFW::CompressedData compressedDataKern; - xran_bfp_compress_bfw_fn com_fn = NULL; - -#if 0 - for (int m = 0; m < BlockFloatCompander::k_numRB; ++m){ - for (int n = 0; n < BlockFloatCompander::k_numREReal; ++n){ - expandedDataInput.dataExpanded[m*BlockFloatCompander::k_numREReal+n] = - request->data_in[m*BlockFloatCompander::k_numREReal+n]; - } - } -#endif + BlockFloatCompander::ExpandedData expandedDataInput; + BlockFloatCompander::CompressedData compressedDataOut; + xran_bfp_compress_fn com_fn = NULL; - expandedDataInput.dataExpanded = request->data_in; - compressedDataKern.dataCompressed = (uint8_t*)response->data_out; + if (request->numRBs != 1){ + printf("Unsupported numRBs %d\n", request->numRBs); + return -1; + } - com_fn = BlockFloatCompanderBFW::BlockFloatCompress_Basic; - switch (request->iqWidth){ + switch (request->iqWidth) { case 8: - expandedDataInput.iqWidth = 8; - break; case 9: - expandedDataInput.iqWidth = 9; - //com_fn = BlockFloatCompanderBFW::BlockFloatExpand_9b_AVX512 - break; case 10: - expandedDataInput.iqWidth = 10; - break; case 12: - expandedDataInput.iqWidth = 12; - break; - default: - printf("bfwIqWidth is not supported %d\n", request->iqWidth); - return -1; - break; + 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; } - com_fn(expandedDataInput, &compressedDataKern); - response->len = ((BlockFloatCompanderBFW::k_numRE/16*4*expandedDataInput.iqWidth)+1)*BlockFloatCompanderBFW::k_numRB; + 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]; - return 0; -} + com_fn(expandedDataInput, &compressedDataOut); -/** callback function type for Symbol packet */ -typedef void (*xran_bfp_decompress_fn)(const BlockFloatCompander::CompressedData& dataIn, BlockFloatCompander::ExpandedData* dataOut); + response->len = (((expandedDataInput.numDataElements * expandedDataInput.iqWidth) >> 3) + 1) + * request->numRBs; + return 0; +} int32_t -xranlib_decompress_avx512(const struct xranlib_decompress_request *request, - struct xranlib_decompress_response *response) +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; - int16_t numRBs = request->numRBs; - int16_t len = 0; - switch (request->iqWidth){ + if (request->numRBs != 1){ + printf("Unsupported numRBs %d\n", request->numRBs); + return -1; + } + + switch (request->iqWidth) { case 8: - compressedDataInput.iqWidth = 8; - decom_fn = BlockFloatCompander::BlockFloatExpand_8b_AVX512; - break; case 9: - compressedDataInput.iqWidth = 9; - decom_fn = BlockFloatCompander::BlockFloatExpand_9b_AVX512; - break; case 10: - compressedDataInput.iqWidth = 10; - decom_fn = BlockFloatCompander::BlockFloatExpand_10b_AVX512; - break; case 12: - compressedDataInput.iqWidth = 12; - decom_fn = BlockFloatCompander::BlockFloatExpand_12b_AVX512; - break; - default: - compressedDataInput.iqWidth = request->iqWidth; - decom_fn = BlockFloatCompander::BlockFloatExpand_Basic; - break; + 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; } - for (int16_t block_idx = 0; - block_idx < RB_NUM_ROUNDUP(numRBs)/BlockFloatCompander::k_numRB; - block_idx++) { + 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]; - compressedDataInput.dataCompressed = (uint8_t*)&request->data_in[block_idx*(((3 * compressedDataInput.iqWidth ) + 1) * BlockFloatCompander::k_numRB)]; - expandedDataOut.dataExpanded = &response->data_out[len]; + decom_fn(compressedDataInput, &expandedDataOut); - decom_fn(compressedDataInput, &expandedDataOut); - len += std::min((int16_t)BlockFloatCompander::k_numSampsExpanded, (int16_t)(numRBs*BlockFloatCompander::k_numREReal)); - } - - response->len = numRBs * BlockFloatCompander::k_numREReal* sizeof(int16_t); + response->len = request->numRBs * compressedDataInput.numDataElements * sizeof(int16_t); return 0; } +