*******************************************************************************/
#include "xran_compression.hpp"
+#include "xran_compression.h"
#include <complex>
#include <algorithm>
#include <immintrin.h>
+#include <limits.h>
+#include <cstring>
+static int16_t saturateAbs(int16_t inVal)
+{
+ int16_t result;
+ if (inVal == std::numeric_limits<short>::min())
+ {
+ result = std::numeric_limits<short>::max();
+ }
+ else
+ {
+ result = (int16_t)std::abs(inVal);
+ }
+ return result;
+}
+
+
+/// Compute exponent value for a set of RB from the maximum absolute value
void
-BlockFloatCompander::BlockFloatCompress_AVX512(const ExpandedData& dataIn, CompressedData* dataOut)
+computeExponent(const BlockFloatCompander::ExpandedData& dataIn, int8_t* expStore)
{
__m512i maxAbs = __m512i();
/// 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;
+ 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)
/// [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;
+ 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);
- static constexpr uint8_t k_msk2 = 0b11000011; // Copy middle two lanes of src
- static constexpr int k_shuff2 = 0xB1;
+ 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);
- static constexpr uint8_t k_msk3 = 0b00111111; // Copy last lane of src
- static constexpr int k_shuff3 = 0xBE;
+ 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);
/// Perform max abs on these 3 registers
/// 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);
+ 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);
+ 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);
/// 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 };
+ 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);
}
/// 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);
+ 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);
+ /// 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<const __m512i*>(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);
+}
+
+
+/// 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<const __m512i*>(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);
+}
+
+
+/// 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<const __m512i*>(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);
+}
+
+
+/// 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)
+ {
+ const __m512i* rawDataIn = reinterpret_cast<const __m512i*>(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));
+ }
+}
+
+
+/// 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] = {};
- static constexpr uint16_t k_expWriteMask = 0xFFFF;
- _mm512_mask_cvtepi32_storeu_epi8(storedExp, k_expWriteMask, exponent);
+ 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 exponent shift
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);
+ /// Pack compressed data network byte order
+ auto compDataBytePacked = networkBytePack9b(compData);
+
+ /// Store exponent first
+ constexpr int k_totNumBytesPerRB = 28;
+ auto thisRBExpAddr = n * k_totNumBytesPerRB;
+ dataOut->dataCompressed[thisRBExpAddr] = storedExp[n];
+
+ /// 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));
+ }
+}
+
+
+/// 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 exponent shift
+ const __m512i* rawDataIn = reinterpret_cast<const __m512i*>(dataIn.dataExpanded + n * BlockFloatCompander::k_numREReal);
+ auto compData = _mm512_srai_epi16(*rawDataIn, storedExp[n]);
+
+ /// 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];
+
+ /// 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));
+ }
+}
+
+
+/// 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)
+ {
+ /// Apply exponent shift
+ const __m512i* rawDataIn = reinterpret_cast<const __m512i*>(dataIn.dataExpanded + n * BlockFloatCompander::k_numREReal);
+ auto compData = _mm512_srai_epi16(*rawDataIn, storedExp[n]);
+
+ /// Pack compressed data network byte order
+ auto compDataBytePacked = networkBytePack12b(compData);
+
+ /// Store exponent first
+ constexpr int k_totNumBytesPerRB = 37;
+ auto thisRBExpAddr = n * k_totNumBytesPerRB;
+ dataOut->dataCompressed[thisRBExpAddr] = storedExp[n];
+
+ /// 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));
}
}
+/// 8 bit expansion
void
-BlockFloatCompander::BlockFloatExpand_AVX512(const CompressedData& dataIn, ExpandedData* dataOut)
+BlockFloatCompander::BlockFloatExpand_8b_AVX512(const CompressedData& dataIn, ExpandedData* dataOut)
{
#pragma unroll(BlockFloatCompander::k_numRB)
for (int n = 0; n < BlockFloatCompander::k_numRB; ++n)
{
/// Expand 1RB of data
- const __m256i* rawDataIn = reinterpret_cast<const __m256i*>(dataIn.dataCompressed + n * (BlockFloatCompander::k_numREReal + 1) + 1);
+ auto expAddr = n * (BlockFloatCompander::k_numREReal + 1);
+ 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 + n * (BlockFloatCompander::k_numREReal + 1)));
-
+ const auto expData = _mm512_slli_epi16(compData16, *(dataIn.dataCompressed + expAddr));
/// Write expanded data to output
- static constexpr uint8_t k_rbMask64 = 0b00111111; // 64b write mask for 1RB (24 int16 values)
+ 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);
}
}
+/// 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)
+ {
+ constexpr int k_totNumBytesPerRB = 28;
+ auto expAddr = n * k_totNumBytesPerRB;
+
+ /// Unpack network order packed data
+ auto expData = networkByteUnpack9b(dataIn.dataCompressed + expAddr + 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);
+ }
+}
+
+
+/// 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)
+ {
+ constexpr int k_totNumBytesPerRB = 31;
+ auto expAddr = n * k_totNumBytesPerRB;
+
+ /// Unpack network order packed data
+ auto expData = networkByteUnpack10b(dataIn.dataCompressed + expAddr + 1);
+
+ /// Apply exponent scaling (by appropriate arithmetic shift right)
+ constexpr int k_maxExpShift = 6;
+ 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);
+ }
+}
+
+
+/// 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)
+ {
+ constexpr int k_totNumBytesPerRB = 37;
+ auto expAddr = n * k_totNumBytesPerRB;
+
+ /// Unpack network order packed data
+ auto expData = networkByteUnpack12b(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));
+
+ /// 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);
+ }
+}
+
+
+/// Reference compression
void
BlockFloatCompander::BlockFloatCompress_Basic(const ExpandedData& dataIn, CompressedData* dataOut)
{
- int16_t maxAbs[BlockFloatCompander::k_numRB];
+ 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)
{
- // Find max abs value for this RB
- maxAbs[rb] = 0;
+ /// 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;
- int16_t dataAbs = (int16_t)std::abs(dataIn.dataExpanded[dataIdx]);
- maxAbs[rb] = std::max(maxAbs[rb], dataAbs);
+ auto dataAbs = saturateAbs(dataIn.dataExpanded[dataIdx]);
+ maxAbs = std::max(maxAbs, dataAbs);
}
- // 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;
+ // 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
+ /// 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)
{
auto dataIdxIn = rb * BlockFloatCompander::k_numREReal + re;
- auto dataIdxOut = (expIdx + 1) + re;
- dataOut->dataCompressed[dataIdxOut] = (int8_t)(dataIn.dataExpanded[dataIdxIn] >> thisExp);
+ auto thisRE = dataIn.dataExpanded[dataIdxIn] >> thisExp;
+ byteBuffer = (byteBuffer << dataIn.iqWidth) + (int)(thisRE & iqMask);
+
+ byteShiftVal += (8 + byteShiftUnits);
+ while (byteShiftVal >= 0)
+ {
+ auto thisByte = (uint8_t)((byteBuffer >> byteShiftVal) & k_byteMask);
+ dataOut->dataCompressed[dataOutIdx++] = thisByte;
+ byteShiftVal -= 8;
+ }
}
}
+ dataOut->iqWidth = dataIn.iqWidth;
}
-
+/// Reference expansion
void
BlockFloatCompander::BlockFloatExpand_Basic(const CompressedData& dataIn, ExpandedData* dataOut)
{
- // Expand data
+ 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)
{
- for (int re = 0; re < BlockFloatCompander::k_numREReal; ++re)
+ auto expIdx = rb * numBytesPerRB;
+ auto signExtShift = 32 - dataIn.iqWidth - dataIn.dataCompressed[expIdx];
+
+ for (int b = 0; b < numBytesPerRB - 1; ++b)
{
- 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);
+ 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;
+ }
}
}
}
+
+/// Reference compression
+void
+BlockFloatCompanderBFW::BlockFloatCompress_Basic(const BlockFloatCompanderBFW::ExpandedData& dataIn, BlockFloatCompanderBFW::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)
+ {
+ /// 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);
+ }
+
+ // 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);
+
+ byteShiftVal += (8 + byteShiftUnits);
+ while (byteShiftVal >= 0)
+ {
+ auto thisByte = (uint8_t)((byteBuffer >> byteShiftVal) & k_byteMask);
+ dataOut->dataCompressed[dataOutIdx++] = thisByte;
+ byteShiftVal -= 8;
+ }
+ }
+ }
+ dataOut->iqWidth = dataIn.iqWidth;
+}
+
+/// Reference expansion
+void
+BlockFloatCompanderBFW::BlockFloatExpand_Basic(const BlockFloatCompanderBFW::CompressedData& dataIn, BlockFloatCompanderBFW::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 < BlockFloatCompanderBFW::k_numRB; ++rb)
+ {
+ auto expIdx = rb * numBytesPerRB;
+ auto signExtShift = 32 - dataIn.iqWidth - dataIn.dataCompressed[expIdx];
+
+ 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;
+ }
+ }
+ }
+}
+
+#define RB_NUM_ROUNDUP(rb) \
+ (BlockFloatCompander::k_numRB * ((rb + BlockFloatCompander::k_numRB - 1) / BlockFloatCompander::k_numRB))
+
+
+/** callback function type for Symbol packet */
+typedef void (*xran_bfp_compress_fn)(const BlockFloatCompander::ExpandedData& dataIn,
+ BlockFloatCompander::CompressedData* 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;
+ int16_t numRBs = request->numRBs;
+ int16_t len = 0;
+
+ 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;
+ break;
+ default:
+ expandedDataInput.iqWidth = request->iqWidth;
+ com_fn = BlockFloatCompander::BlockFloatCompress_Basic;
+ break;
+ }
+
+ for (int16_t block_idx = 0;
+ block_idx < RB_NUM_ROUNDUP(numRBs)/BlockFloatCompander::k_numRB /*+ 1*/; /* 16 RBs at time */
+ block_idx++) {
+
+ expandedDataInput.dataExpanded =
+ &request->data_in[block_idx*BlockFloatCompander::k_numSampsExpanded];
+ compressedDataOut.dataCompressed =
+ (uint8_t*)&response->data_out[len];
+
+ com_fn(expandedDataInput, &compressedDataOut);
+ len += ((3 * expandedDataInput.iqWidth) + 1) * std::min((int16_t)BlockFloatCompander::k_numRB,(int16_t)numRBs);
+ }
+
+ response->len = ((3 * expandedDataInput.iqWidth) + 1) * numRBs;
+
+ 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
+
+ expandedDataInput.dataExpanded = request->data_in;
+ compressedDataKern.dataCompressed = (uint8_t*)response->data_out;
+
+ com_fn = BlockFloatCompanderBFW::BlockFloatCompress_Basic;
+ 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;
+ }
+
+ com_fn(expandedDataInput, &compressedDataKern);
+ response->len = ((BlockFloatCompanderBFW::k_numRE/16*4*expandedDataInput.iqWidth)+1)*BlockFloatCompanderBFW::k_numRB;
+
+ return 0;
+}
+
+/** callback function type for Symbol packet */
+typedef void (*xran_bfp_decompress_fn)(const BlockFloatCompander::CompressedData& dataIn, BlockFloatCompander::ExpandedData* dataOut);
+
+
+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;
+ int16_t numRBs = request->numRBs;
+ int16_t len = 0;
+
+ 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;
+ }
+
+ for (int16_t block_idx = 0;
+ block_idx < RB_NUM_ROUNDUP(numRBs)/BlockFloatCompander::k_numRB;
+ block_idx++) {
+
+ 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);
+ len += std::min((int16_t)BlockFloatCompander::k_numSampsExpanded, (int16_t)(numRBs*BlockFloatCompander::k_numREReal));
+ }
+
+ response->len = numRBs * BlockFloatCompander::k_numREReal* sizeof(int16_t);
+
+ return 0;
+}
Code Review / o-du / phy.git / blobdiff