| // This file is part of Eigen, a lightweight C++ template library |
| // for linear algebra. |
| // |
| // Copyright (C) 2022 Intel Corporation |
| // |
| // This Source Code Form is subject to the terms of the Mozilla |
| // Public License v. 2.0. If a copy of the MPL was not distributed |
| // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. |
| |
| #ifndef EIGEN_CORE_ARCH_AVX512_TRSM_UNROLLS_H |
| #define EIGEN_CORE_ARCH_AVX512_TRSM_UNROLLS_H |
| |
| template <bool isARowMajor = true> |
| EIGEN_ALWAYS_INLINE int64_t idA(int64_t i, int64_t j, int64_t LDA) { |
| EIGEN_IF_CONSTEXPR(isARowMajor) return i * LDA + j; |
| else return i + j * LDA; |
| } |
| |
| /** |
| * This namespace contains various classes used to generate compile-time unrolls which are |
| * used throughout the trsm/gemm kernels. The unrolls are characterized as for-loops (1-D), nested |
| * for-loops (2-D), or triple nested for-loops (3-D). Unrolls are generated using template recursion |
| * |
| * Example, the 2-D for-loop is unrolled recursively by first flattening to a 1-D loop. |
| * |
| * for(startI = 0; startI < endI; startI++) for(startC = 0; startC < endI*endJ; startC++) |
| * for(startJ = 0; startJ < endJ; startJ++) ----> startI = (startC)/(endJ) |
| * func(startI,startJ) startJ = (startC)%(endJ) |
| * func(...) |
| * |
| * The 1-D loop can be unrolled recursively by using enable_if and defining an auxillary function |
| * with a template parameter used as a counter. |
| * |
| * template <endI, endJ, counter> |
| * std::enable_if_t<(counter <= 0)> <---- tail case. |
| * aux_func {} |
| * |
| * template <endI, endJ, counter> |
| * std::enable_if_t<(counter > 0)> <---- actual for-loop |
| * aux_func { |
| * startC = endI*endJ - counter |
| * startI = (startC)/(endJ) |
| * startJ = (startC)%(endJ) |
| * func(startI, startJ) |
| * aux_func<endI, endJ, counter-1>() |
| * } |
| * |
| * Note: Additional wrapper functions are provided for aux_func which hides the counter template |
| * parameter since counter usually depends on endI, endJ, etc... |
| * |
| * Conventions: |
| * 1) endX: specifies the terminal value for the for-loop, (ex: for(startX = 0; startX < endX; startX++)) |
| * |
| * 2) rem, remM, remK template parameters are used for deciding whether to use masked operations for |
| * handling remaining tails (when sizes are not multiples of PacketSize or EIGEN_AVX_MAX_NUM_ROW) |
| */ |
| namespace unrolls { |
| |
| template <int64_t N> |
| EIGEN_ALWAYS_INLINE auto remMask(int64_t m) { |
| EIGEN_IF_CONSTEXPR(N == 16) { return 0xFFFF >> (16 - m); } |
| else EIGEN_IF_CONSTEXPR(N == 8) { |
| return 0xFF >> (8 - m); |
| } |
| else EIGEN_IF_CONSTEXPR(N == 4) { |
| return 0x0F >> (4 - m); |
| } |
| return 0; |
| } |
| |
| template <typename Packet> |
| EIGEN_ALWAYS_INLINE void trans8x8blocks(PacketBlock<Packet, 8> &kernel); |
| |
| template <> |
| EIGEN_ALWAYS_INLINE void trans8x8blocks(PacketBlock<Packet16f, 8> &kernel) { |
| __m512 T0 = _mm512_unpacklo_ps(kernel.packet[0], kernel.packet[1]); |
| __m512 T1 = _mm512_unpackhi_ps(kernel.packet[0], kernel.packet[1]); |
| __m512 T2 = _mm512_unpacklo_ps(kernel.packet[2], kernel.packet[3]); |
| __m512 T3 = _mm512_unpackhi_ps(kernel.packet[2], kernel.packet[3]); |
| __m512 T4 = _mm512_unpacklo_ps(kernel.packet[4], kernel.packet[5]); |
| __m512 T5 = _mm512_unpackhi_ps(kernel.packet[4], kernel.packet[5]); |
| __m512 T6 = _mm512_unpacklo_ps(kernel.packet[6], kernel.packet[7]); |
| __m512 T7 = _mm512_unpackhi_ps(kernel.packet[6], kernel.packet[7]); |
| |
| kernel.packet[0] = _mm512_castpd_ps(_mm512_unpacklo_pd(_mm512_castps_pd(T0), _mm512_castps_pd(T2))); |
| kernel.packet[1] = _mm512_castpd_ps(_mm512_unpackhi_pd(_mm512_castps_pd(T0), _mm512_castps_pd(T2))); |
| kernel.packet[2] = _mm512_castpd_ps(_mm512_unpacklo_pd(_mm512_castps_pd(T1), _mm512_castps_pd(T3))); |
| kernel.packet[3] = _mm512_castpd_ps(_mm512_unpackhi_pd(_mm512_castps_pd(T1), _mm512_castps_pd(T3))); |
| kernel.packet[4] = _mm512_castpd_ps(_mm512_unpacklo_pd(_mm512_castps_pd(T4), _mm512_castps_pd(T6))); |
| kernel.packet[5] = _mm512_castpd_ps(_mm512_unpackhi_pd(_mm512_castps_pd(T4), _mm512_castps_pd(T6))); |
| kernel.packet[6] = _mm512_castpd_ps(_mm512_unpacklo_pd(_mm512_castps_pd(T5), _mm512_castps_pd(T7))); |
| kernel.packet[7] = _mm512_castpd_ps(_mm512_unpackhi_pd(_mm512_castps_pd(T5), _mm512_castps_pd(T7))); |
| |
| T0 = _mm512_castpd_ps(_mm512_permutex_pd(_mm512_castps_pd(kernel.packet[4]), 0x4E)); |
| T0 = _mm512_mask_blend_ps(0xF0F0, kernel.packet[0], T0); |
| T4 = _mm512_castpd_ps(_mm512_permutex_pd(_mm512_castps_pd(kernel.packet[0]), 0x4E)); |
| T4 = _mm512_mask_blend_ps(0xF0F0, T4, kernel.packet[4]); |
| T1 = _mm512_castpd_ps(_mm512_permutex_pd(_mm512_castps_pd(kernel.packet[5]), 0x4E)); |
| T1 = _mm512_mask_blend_ps(0xF0F0, kernel.packet[1], T1); |
| T5 = _mm512_castpd_ps(_mm512_permutex_pd(_mm512_castps_pd(kernel.packet[1]), 0x4E)); |
| T5 = _mm512_mask_blend_ps(0xF0F0, T5, kernel.packet[5]); |
| T2 = _mm512_castpd_ps(_mm512_permutex_pd(_mm512_castps_pd(kernel.packet[6]), 0x4E)); |
| T2 = _mm512_mask_blend_ps(0xF0F0, kernel.packet[2], T2); |
| T6 = _mm512_castpd_ps(_mm512_permutex_pd(_mm512_castps_pd(kernel.packet[2]), 0x4E)); |
| T6 = _mm512_mask_blend_ps(0xF0F0, T6, kernel.packet[6]); |
| T3 = _mm512_castpd_ps(_mm512_permutex_pd(_mm512_castps_pd(kernel.packet[7]), 0x4E)); |
| T3 = _mm512_mask_blend_ps(0xF0F0, kernel.packet[3], T3); |
| T7 = _mm512_castpd_ps(_mm512_permutex_pd(_mm512_castps_pd(kernel.packet[3]), 0x4E)); |
| T7 = _mm512_mask_blend_ps(0xF0F0, T7, kernel.packet[7]); |
| |
| kernel.packet[0] = T0; |
| kernel.packet[1] = T1; |
| kernel.packet[2] = T2; |
| kernel.packet[3] = T3; |
| kernel.packet[4] = T4; |
| kernel.packet[5] = T5; |
| kernel.packet[6] = T6; |
| kernel.packet[7] = T7; |
| } |
| |
| template <> |
| EIGEN_ALWAYS_INLINE void trans8x8blocks(PacketBlock<Packet8d, 8> &kernel) { |
| ptranspose(kernel); |
| } |
| |
| /*** |
| * Unrolls for tranposed C stores |
| */ |
| template <typename Scalar> |
| class trans { |
| public: |
| using vec = typename std::conditional<std::is_same<Scalar, float>::value, vecFullFloat, vecFullDouble>::type; |
| using vecHalf = typename std::conditional<std::is_same<Scalar, float>::value, vecHalfFloat, vecFullDouble>::type; |
| static constexpr int64_t PacketSize = packet_traits<Scalar>::size; |
| |
| /*********************************** |
| * Auxillary Functions for: |
| * - storeC |
| *********************************** |
| */ |
| |
| /** |
| * aux_storeC |
| * |
| * 1-D unroll |
| * for(startN = 0; startN < endN; startN++) |
| * |
| * (endN <= PacketSize) is required to handle the fp32 case, see comments in transStoreC |
| * |
| **/ |
| template <int64_t endN, int64_t counter, int64_t unrollN, int64_t packetIndexOffset, bool remM> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0 && endN <= PacketSize)> aux_storeC( |
| Scalar *C_arr, int64_t LDC, PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, int64_t remM_ = 0) { |
| constexpr int64_t counterReverse = endN - counter; |
| constexpr int64_t startN = counterReverse; |
| |
| EIGEN_IF_CONSTEXPR(startN < EIGEN_AVX_MAX_NUM_ROW) { |
| EIGEN_IF_CONSTEXPR(remM) { |
| pstoreu<Scalar>( |
| C_arr + LDC * startN, |
| padd(ploadu<vecHalf>((const Scalar *)C_arr + LDC * startN, remMask<EIGEN_AVX_MAX_NUM_ROW>(remM_)), |
| preinterpret<vecHalf>(zmm.packet[packetIndexOffset + (unrollN / PacketSize) * startN]), |
| remMask<EIGEN_AVX_MAX_NUM_ROW>(remM_)), |
| remMask<EIGEN_AVX_MAX_NUM_ROW>(remM_)); |
| } |
| else { |
| pstoreu<Scalar>(C_arr + LDC * startN, |
| padd(ploadu<vecHalf>((const Scalar *)C_arr + LDC * startN), |
| preinterpret<vecHalf>(zmm.packet[packetIndexOffset + (unrollN / PacketSize) * startN]))); |
| } |
| } |
| else { // This block is only needed for fp32 case |
| // Reinterpret as __m512 for _mm512_shuffle_f32x4 |
| vecFullFloat zmm2vecFullFloat = preinterpret<vecFullFloat>( |
| zmm.packet[packetIndexOffset + (unrollN / PacketSize) * (startN - EIGEN_AVX_MAX_NUM_ROW)]); |
| // Swap lower and upper half of avx register. |
| zmm.packet[packetIndexOffset + (unrollN / PacketSize) * (startN - EIGEN_AVX_MAX_NUM_ROW)] = |
| preinterpret<vec>(_mm512_shuffle_f32x4(zmm2vecFullFloat, zmm2vecFullFloat, 0b01001110)); |
| |
| EIGEN_IF_CONSTEXPR(remM) { |
| pstoreu<Scalar>( |
| C_arr + LDC * startN, |
| padd(ploadu<vecHalf>((const Scalar *)C_arr + LDC * startN, remMask<EIGEN_AVX_MAX_NUM_ROW>(remM_)), |
| preinterpret<vecHalf>( |
| zmm.packet[packetIndexOffset + (unrollN / PacketSize) * (startN - EIGEN_AVX_MAX_NUM_ROW)])), |
| remMask<EIGEN_AVX_MAX_NUM_ROW>(remM_)); |
| } |
| else { |
| pstoreu<Scalar>( |
| C_arr + LDC * startN, |
| padd(ploadu<vecHalf>((const Scalar *)C_arr + LDC * startN), |
| preinterpret<vecHalf>( |
| zmm.packet[packetIndexOffset + (unrollN / PacketSize) * (startN - EIGEN_AVX_MAX_NUM_ROW)]))); |
| } |
| } |
| aux_storeC<endN, counter - 1, unrollN, packetIndexOffset, remM>(C_arr, LDC, zmm, remM_); |
| } |
| |
| template <int64_t endN, int64_t counter, int64_t unrollN, int64_t packetIndexOffset, bool remM> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<!(counter > 0 && endN <= PacketSize)> aux_storeC( |
| Scalar *C_arr, int64_t LDC, PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, int64_t remM_ = 0) { |
| EIGEN_UNUSED_VARIABLE(C_arr); |
| EIGEN_UNUSED_VARIABLE(LDC); |
| EIGEN_UNUSED_VARIABLE(zmm); |
| EIGEN_UNUSED_VARIABLE(remM_); |
| } |
| |
| template <int64_t endN, int64_t unrollN, int64_t packetIndexOffset, bool remM> |
| static EIGEN_ALWAYS_INLINE void storeC(Scalar *C_arr, int64_t LDC, |
| PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, |
| int64_t remM_ = 0) { |
| aux_storeC<endN, endN, unrollN, packetIndexOffset, remM>(C_arr, LDC, zmm, remM_); |
| } |
| |
| /** |
| * Transposes LxunrollN row major block of matrices stored EIGEN_AVX_MAX_NUM_ACC zmm registers to |
| * "unrollN"xL ymm registers to be stored col-major into C. |
| * |
| * For 8x48, the 8x48 block (row-major) is stored in zmm as follows: |
| * |
| * row0: zmm0 zmm1 zmm2 |
| * row1: zmm3 zmm4 zmm5 |
| * . |
| * . |
| * row7: zmm21 zmm22 zmm23 |
| * |
| * For 8x32, the 8x32 block (row-major) is stored in zmm as follows: |
| * |
| * row0: zmm0 zmm1 |
| * row1: zmm2 zmm3 |
| * . |
| * . |
| * row7: zmm14 zmm15 |
| * |
| * |
| * In general we will have {1,2,3} groups of avx registers each of size |
| * EIGEN_AVX_MAX_NUM_ROW. packetIndexOffset is used to select which "block" of |
| * avx registers are being transposed. |
| */ |
| template <int64_t unrollN, int64_t packetIndexOffset> |
| static EIGEN_ALWAYS_INLINE void transpose(PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm) { |
| // Note: this assumes EIGEN_AVX_MAX_NUM_ROW = 8. Unrolls should be adjusted |
| // accordingly if EIGEN_AVX_MAX_NUM_ROW is smaller. |
| constexpr int64_t zmmStride = unrollN / PacketSize; |
| PacketBlock<vec, EIGEN_AVX_MAX_NUM_ROW> r; |
| r.packet[0] = zmm.packet[packetIndexOffset + zmmStride * 0]; |
| r.packet[1] = zmm.packet[packetIndexOffset + zmmStride * 1]; |
| r.packet[2] = zmm.packet[packetIndexOffset + zmmStride * 2]; |
| r.packet[3] = zmm.packet[packetIndexOffset + zmmStride * 3]; |
| r.packet[4] = zmm.packet[packetIndexOffset + zmmStride * 4]; |
| r.packet[5] = zmm.packet[packetIndexOffset + zmmStride * 5]; |
| r.packet[6] = zmm.packet[packetIndexOffset + zmmStride * 6]; |
| r.packet[7] = zmm.packet[packetIndexOffset + zmmStride * 7]; |
| trans8x8blocks(r); |
| zmm.packet[packetIndexOffset + zmmStride * 0] = r.packet[0]; |
| zmm.packet[packetIndexOffset + zmmStride * 1] = r.packet[1]; |
| zmm.packet[packetIndexOffset + zmmStride * 2] = r.packet[2]; |
| zmm.packet[packetIndexOffset + zmmStride * 3] = r.packet[3]; |
| zmm.packet[packetIndexOffset + zmmStride * 4] = r.packet[4]; |
| zmm.packet[packetIndexOffset + zmmStride * 5] = r.packet[5]; |
| zmm.packet[packetIndexOffset + zmmStride * 6] = r.packet[6]; |
| zmm.packet[packetIndexOffset + zmmStride * 7] = r.packet[7]; |
| } |
| }; |
| |
| /** |
| * Unrolls for copyBToRowMajor |
| * |
| * Idea: |
| * 1) Load a block of right-hand sides to registers (using loadB). |
| * 2) Convert the block from column-major to row-major (transposeLxL) |
| * 3) Store the blocks from register either to a temp array (toTemp == true), or back to B (toTemp == false). |
| * |
| * We use at most EIGEN_AVX_MAX_NUM_ACC avx registers to store the blocks of B. The remaining registers are |
| * used as temps for transposing. |
| * |
| * Blocks will be of size Lx{U1,U2,U3}. packetIndexOffset is used to index between these subblocks |
| * For fp32, PacketSize = 2*EIGEN_AVX_MAX_NUM_ROW, so we reinterpret packets as packets half the size (zmm -> ymm). |
| */ |
| template <typename Scalar> |
| class transB { |
| public: |
| using vec = typename std::conditional<std::is_same<Scalar, float>::value, vecFullFloat, vecFullDouble>::type; |
| using vecHalf = typename std::conditional<std::is_same<Scalar, float>::value, vecHalfFloat, vecFullDouble>::type; |
| static constexpr int64_t PacketSize = packet_traits<Scalar>::size; |
| |
| /*********************************** |
| * Auxillary Functions for: |
| * - loadB |
| * - storeB |
| * - loadBBlock |
| * - storeBBlock |
| *********************************** |
| */ |
| |
| /** |
| * aux_loadB |
| * |
| * 1-D unroll |
| * for(startN = 0; startN < endN; startN++) |
| **/ |
| template <int64_t endN, int64_t counter, int64_t packetIndexOffset, bool remM, int64_t remN_> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_loadB( |
| Scalar *B_arr, int64_t LDB, PacketBlock<vecHalf, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &ymm, |
| int64_t remM_ = 0) { |
| constexpr int64_t counterReverse = endN - counter; |
| constexpr int64_t startN = counterReverse; |
| |
| EIGEN_IF_CONSTEXPR(remM) { |
| ymm.packet[packetIndexOffset + startN] = |
| ploadu<vecHalf>((const Scalar *)&B_arr[startN * LDB], remMask<EIGEN_AVX_MAX_NUM_ROW>(remM_)); |
| } |
| else { |
| EIGEN_IF_CONSTEXPR(remN_ == 0) { |
| ymm.packet[packetIndexOffset + startN] = ploadu<vecHalf>((const Scalar *)&B_arr[startN * LDB]); |
| } |
| else ymm.packet[packetIndexOffset + startN] = |
| ploadu<vecHalf>((const Scalar *)&B_arr[startN * LDB], remMask<EIGEN_AVX_MAX_NUM_ROW>(remN_)); |
| } |
| |
| aux_loadB<endN, counter - 1, packetIndexOffset, remM, remN_>(B_arr, LDB, ymm, remM_); |
| } |
| |
| template <int64_t endN, int64_t counter, int64_t packetIndexOffset, bool remM, int64_t remN_> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_loadB( |
| Scalar *B_arr, int64_t LDB, PacketBlock<vecHalf, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &ymm, |
| int64_t remM_ = 0) { |
| EIGEN_UNUSED_VARIABLE(B_arr); |
| EIGEN_UNUSED_VARIABLE(LDB); |
| EIGEN_UNUSED_VARIABLE(ymm); |
| EIGEN_UNUSED_VARIABLE(remM_); |
| } |
| |
| /** |
| * aux_storeB |
| * |
| * 1-D unroll |
| * for(startN = 0; startN < endN; startN++) |
| **/ |
| template <int64_t endN, int64_t counter, int64_t packetIndexOffset, bool remK, bool remM> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_storeB( |
| Scalar *B_arr, int64_t LDB, PacketBlock<vecHalf, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &ymm, int64_t rem_ = 0) { |
| constexpr int64_t counterReverse = endN - counter; |
| constexpr int64_t startN = counterReverse; |
| |
| EIGEN_IF_CONSTEXPR(remK || remM) { |
| pstoreu<Scalar>(&B_arr[startN * LDB], ymm.packet[packetIndexOffset + startN], |
| remMask<EIGEN_AVX_MAX_NUM_ROW>(rem_)); |
| } |
| else { |
| pstoreu<Scalar>(&B_arr[startN * LDB], ymm.packet[packetIndexOffset + startN]); |
| } |
| |
| aux_storeB<endN, counter - 1, packetIndexOffset, remK, remM>(B_arr, LDB, ymm, rem_); |
| } |
| |
| template <int64_t endN, int64_t counter, int64_t packetIndexOffset, bool remK, bool remM> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_storeB( |
| Scalar *B_arr, int64_t LDB, PacketBlock<vecHalf, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &ymm, int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(B_arr); |
| EIGEN_UNUSED_VARIABLE(LDB); |
| EIGEN_UNUSED_VARIABLE(ymm); |
| EIGEN_UNUSED_VARIABLE(rem_); |
| } |
| |
| /** |
| * aux_loadBBlock |
| * |
| * 1-D unroll |
| * for(startN = 0; startN < endN; startN += EIGEN_AVX_MAX_NUM_ROW) |
| **/ |
| template <int64_t endN, int64_t counter, bool toTemp, bool remM, int64_t remN_> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_loadBBlock( |
| Scalar *B_arr, int64_t LDB, Scalar *B_temp, int64_t LDB_, |
| PacketBlock<vecHalf, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &ymm, int64_t remM_ = 0) { |
| constexpr int64_t counterReverse = endN - counter; |
| constexpr int64_t startN = counterReverse; |
| transB::template loadB<EIGEN_AVX_MAX_NUM_ROW, startN, false, (toTemp ? 0 : remN_)>(&B_temp[startN], LDB_, ymm); |
| aux_loadBBlock<endN, counter - EIGEN_AVX_MAX_NUM_ROW, toTemp, remM, remN_>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| } |
| |
| template <int64_t endN, int64_t counter, bool toTemp, bool remM, int64_t remN_> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_loadBBlock( |
| Scalar *B_arr, int64_t LDB, Scalar *B_temp, int64_t LDB_, |
| PacketBlock<vecHalf, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &ymm, int64_t remM_ = 0) { |
| EIGEN_UNUSED_VARIABLE(B_arr); |
| EIGEN_UNUSED_VARIABLE(LDB); |
| EIGEN_UNUSED_VARIABLE(B_temp); |
| EIGEN_UNUSED_VARIABLE(LDB_); |
| EIGEN_UNUSED_VARIABLE(ymm); |
| EIGEN_UNUSED_VARIABLE(remM_); |
| } |
| |
| /** |
| * aux_storeBBlock |
| * |
| * 1-D unroll |
| * for(startN = 0; startN < endN; startN += EIGEN_AVX_MAX_NUM_ROW) |
| **/ |
| template <int64_t endN, int64_t counter, bool toTemp, bool remM, int64_t remK_> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_storeBBlock( |
| Scalar *B_arr, int64_t LDB, Scalar *B_temp, int64_t LDB_, |
| PacketBlock<vecHalf, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &ymm, int64_t remM_ = 0) { |
| constexpr int64_t counterReverse = endN - counter; |
| constexpr int64_t startN = counterReverse; |
| |
| EIGEN_IF_CONSTEXPR(toTemp) { |
| transB::template storeB<EIGEN_AVX_MAX_NUM_ROW, startN, remK_ != 0, false>(&B_temp[startN], LDB_, ymm, remK_); |
| } |
| else { |
| transB::template storeB<std::min(EIGEN_AVX_MAX_NUM_ROW, endN), startN, false, remM>(&B_arr[0 + startN * LDB], LDB, |
| ymm, remM_); |
| } |
| aux_storeBBlock<endN, counter - EIGEN_AVX_MAX_NUM_ROW, toTemp, remM, remK_>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| } |
| |
| template <int64_t endN, int64_t counter, bool toTemp, bool remM, int64_t remK_> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_storeBBlock( |
| Scalar *B_arr, int64_t LDB, Scalar *B_temp, int64_t LDB_, |
| PacketBlock<vecHalf, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &ymm, int64_t remM_ = 0) { |
| EIGEN_UNUSED_VARIABLE(B_arr); |
| EIGEN_UNUSED_VARIABLE(LDB); |
| EIGEN_UNUSED_VARIABLE(B_temp); |
| EIGEN_UNUSED_VARIABLE(LDB_); |
| EIGEN_UNUSED_VARIABLE(ymm); |
| EIGEN_UNUSED_VARIABLE(remM_); |
| } |
| |
| /******************************************************** |
| * Wrappers for aux_XXXX to hide counter parameter |
| ********************************************************/ |
| |
| template <int64_t endN, int64_t packetIndexOffset, bool remM, int64_t remN_> |
| static EIGEN_ALWAYS_INLINE void loadB(Scalar *B_arr, int64_t LDB, |
| PacketBlock<vecHalf, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &ymm, |
| int64_t remM_ = 0) { |
| aux_loadB<endN, endN, packetIndexOffset, remM, remN_>(B_arr, LDB, ymm, remM_); |
| } |
| |
| template <int64_t endN, int64_t packetIndexOffset, bool remK, bool remM> |
| static EIGEN_ALWAYS_INLINE void storeB(Scalar *B_arr, int64_t LDB, |
| PacketBlock<vecHalf, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &ymm, |
| int64_t rem_ = 0) { |
| aux_storeB<endN, endN, packetIndexOffset, remK, remM>(B_arr, LDB, ymm, rem_); |
| } |
| |
| template <int64_t unrollN, bool toTemp, bool remM, int64_t remN_ = 0> |
| static EIGEN_ALWAYS_INLINE void loadBBlock(Scalar *B_arr, int64_t LDB, Scalar *B_temp, int64_t LDB_, |
| PacketBlock<vecHalf, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &ymm, |
| int64_t remM_ = 0) { |
| EIGEN_IF_CONSTEXPR(toTemp) { transB::template loadB<unrollN, 0, remM, 0>(&B_arr[0], LDB, ymm, remM_); } |
| else { |
| aux_loadBBlock<unrollN, unrollN, toTemp, remM, remN_>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| } |
| } |
| |
| template <int64_t unrollN, bool toTemp, bool remM, int64_t remK_> |
| static EIGEN_ALWAYS_INLINE void storeBBlock(Scalar *B_arr, int64_t LDB, Scalar *B_temp, int64_t LDB_, |
| PacketBlock<vecHalf, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &ymm, |
| int64_t remM_ = 0) { |
| aux_storeBBlock<unrollN, unrollN, toTemp, remM, remK_>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| } |
| |
| template <int64_t packetIndexOffset> |
| static EIGEN_ALWAYS_INLINE void transposeLxL(PacketBlock<vecHalf, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &ymm) { |
| // Note: this assumes EIGEN_AVX_MAX_NUM_ROW = 8. Unrolls should be adjusted |
| // accordingly if EIGEN_AVX_MAX_NUM_ROW is smaller. |
| PacketBlock<vecHalf, EIGEN_AVX_MAX_NUM_ROW> r; |
| r.packet[0] = ymm.packet[packetIndexOffset + 0]; |
| r.packet[1] = ymm.packet[packetIndexOffset + 1]; |
| r.packet[2] = ymm.packet[packetIndexOffset + 2]; |
| r.packet[3] = ymm.packet[packetIndexOffset + 3]; |
| r.packet[4] = ymm.packet[packetIndexOffset + 4]; |
| r.packet[5] = ymm.packet[packetIndexOffset + 5]; |
| r.packet[6] = ymm.packet[packetIndexOffset + 6]; |
| r.packet[7] = ymm.packet[packetIndexOffset + 7]; |
| ptranspose(r); |
| ymm.packet[packetIndexOffset + 0] = r.packet[0]; |
| ymm.packet[packetIndexOffset + 1] = r.packet[1]; |
| ymm.packet[packetIndexOffset + 2] = r.packet[2]; |
| ymm.packet[packetIndexOffset + 3] = r.packet[3]; |
| ymm.packet[packetIndexOffset + 4] = r.packet[4]; |
| ymm.packet[packetIndexOffset + 5] = r.packet[5]; |
| ymm.packet[packetIndexOffset + 6] = r.packet[6]; |
| ymm.packet[packetIndexOffset + 7] = r.packet[7]; |
| } |
| |
| template <int64_t unrollN, bool toTemp, bool remM> |
| static EIGEN_ALWAYS_INLINE void transB_kernel(Scalar *B_arr, int64_t LDB, Scalar *B_temp, int64_t LDB_, |
| PacketBlock<vecHalf, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &ymm, |
| int64_t remM_ = 0) { |
| constexpr int64_t U3 = PacketSize * 3; |
| constexpr int64_t U2 = PacketSize * 2; |
| constexpr int64_t U1 = PacketSize * 1; |
| /** |
| * Unrolls needed for each case: |
| * - AVX512 fp32 48 32 16 8 4 2 1 |
| * - AVX512 fp64 24 16 8 4 2 1 |
| * |
| * For fp32 L and U1 are 1:2 so for U3/U2 cases the loads/stores need to be split up. |
| */ |
| EIGEN_IF_CONSTEXPR(unrollN == U3) { |
| // load LxU3 B col major, transpose LxU3 row major |
| constexpr int64_t maxUBlock = std::min(3 * EIGEN_AVX_MAX_NUM_ROW, U3); |
| transB::template loadBBlock<maxUBlock, toTemp, remM>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| transB::template transposeLxL<0 * EIGEN_AVX_MAX_NUM_ROW>(ymm); |
| transB::template transposeLxL<1 * EIGEN_AVX_MAX_NUM_ROW>(ymm); |
| transB::template transposeLxL<2 * EIGEN_AVX_MAX_NUM_ROW>(ymm); |
| transB::template storeBBlock<maxUBlock, toTemp, remM, 0>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| |
| EIGEN_IF_CONSTEXPR(maxUBlock < U3) { |
| transB::template loadBBlock<maxUBlock, toTemp, remM>(&B_arr[maxUBlock * LDB], LDB, &B_temp[maxUBlock], LDB_, |
| ymm, remM_); |
| transB::template transposeLxL<0 * EIGEN_AVX_MAX_NUM_ROW>(ymm); |
| transB::template transposeLxL<1 * EIGEN_AVX_MAX_NUM_ROW>(ymm); |
| transB::template transposeLxL<2 * EIGEN_AVX_MAX_NUM_ROW>(ymm); |
| transB::template storeBBlock<maxUBlock, toTemp, remM, 0>(&B_arr[maxUBlock * LDB], LDB, &B_temp[maxUBlock], LDB_, |
| ymm, remM_); |
| } |
| } |
| else EIGEN_IF_CONSTEXPR(unrollN == U2) { |
| // load LxU2 B col major, transpose LxU2 row major |
| constexpr int64_t maxUBlock = std::min(3 * EIGEN_AVX_MAX_NUM_ROW, U2); |
| transB::template loadBBlock<maxUBlock, toTemp, remM>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| transB::template transposeLxL<0 * EIGEN_AVX_MAX_NUM_ROW>(ymm); |
| transB::template transposeLxL<1 * EIGEN_AVX_MAX_NUM_ROW>(ymm); |
| EIGEN_IF_CONSTEXPR(maxUBlock < U2) transB::template transposeLxL<2 * EIGEN_AVX_MAX_NUM_ROW>(ymm); |
| transB::template storeBBlock<maxUBlock, toTemp, remM, 0>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| |
| EIGEN_IF_CONSTEXPR(maxUBlock < U2) { |
| transB::template loadBBlock<EIGEN_AVX_MAX_NUM_ROW, toTemp, remM>(&B_arr[maxUBlock * LDB], LDB, |
| &B_temp[maxUBlock], LDB_, ymm, remM_); |
| transB::template transposeLxL<0>(ymm); |
| transB::template storeBBlock<EIGEN_AVX_MAX_NUM_ROW, toTemp, remM, 0>(&B_arr[maxUBlock * LDB], LDB, |
| &B_temp[maxUBlock], LDB_, ymm, remM_); |
| } |
| } |
| else EIGEN_IF_CONSTEXPR(unrollN == U1) { |
| // load LxU1 B col major, transpose LxU1 row major |
| transB::template loadBBlock<U1, toTemp, remM>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| transB::template transposeLxL<0>(ymm); |
| EIGEN_IF_CONSTEXPR(EIGEN_AVX_MAX_NUM_ROW < U1) { transB::template transposeLxL<1 * EIGEN_AVX_MAX_NUM_ROW>(ymm); } |
| transB::template storeBBlock<U1, toTemp, remM, 0>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| } |
| else EIGEN_IF_CONSTEXPR(unrollN == 8 && U1 > 8) { |
| // load Lx4 B col major, transpose Lx4 row major |
| transB::template loadBBlock<8, toTemp, remM>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| transB::template transposeLxL<0>(ymm); |
| transB::template storeBBlock<8, toTemp, remM, 8>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| } |
| else EIGEN_IF_CONSTEXPR(unrollN == 4 && U1 > 4) { |
| // load Lx4 B col major, transpose Lx4 row major |
| transB::template loadBBlock<4, toTemp, remM>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| transB::template transposeLxL<0>(ymm); |
| transB::template storeBBlock<4, toTemp, remM, 4>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| } |
| else EIGEN_IF_CONSTEXPR(unrollN == 2) { |
| // load Lx2 B col major, transpose Lx2 row major |
| transB::template loadBBlock<2, toTemp, remM, 2>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| transB::template transposeLxL<0>(ymm); |
| transB::template storeBBlock<2, toTemp, remM, 2>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| } |
| else EIGEN_IF_CONSTEXPR(unrollN == 1) { |
| // load Lx1 B col major, transpose Lx1 row major |
| transB::template loadBBlock<1, toTemp, remM, 1>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| transB::template transposeLxL<0>(ymm); |
| transB::template storeBBlock<1, toTemp, remM, 1>(B_arr, LDB, B_temp, LDB_, ymm, remM_); |
| } |
| } |
| }; |
| |
| /** |
| * Unrolls for triSolveKernel |
| * |
| * Idea: |
| * 1) Load a block of right-hand sides to registers in RHSInPacket (using loadRHS). |
| * 2) Do triangular solve with RHSInPacket and a small block of A (triangular matrix) |
| * stored in AInPacket (using triSolveMicroKernel). |
| * 3) Store final results (in avx registers) back into memory (using storeRHS). |
| * |
| * RHSInPacket uses at most EIGEN_AVX_MAX_NUM_ACC avx registers and AInPacket uses at most |
| * EIGEN_AVX_MAX_NUM_ROW registers. |
| */ |
| template <typename Scalar> |
| class trsm { |
| public: |
| using vec = typename std::conditional<std::is_same<Scalar, float>::value, vecFullFloat, vecFullDouble>::type; |
| static constexpr int64_t PacketSize = packet_traits<Scalar>::size; |
| |
| /*********************************** |
| * Auxillary Functions for: |
| * - loadRHS |
| * - storeRHS |
| * - divRHSByDiag |
| * - updateRHS |
| * - triSolveMicroKernel |
| ************************************/ |
| /** |
| * aux_loadRHS |
| * |
| * 2-D unroll |
| * for(startM = 0; startM < endM; startM++) |
| * for(startK = 0; startK < endK; startK++) |
| **/ |
| template <bool isFWDSolve, int64_t endM, int64_t endK, int64_t counter, bool krem> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_loadRHS( |
| Scalar *B_arr, int64_t LDB, PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, int64_t rem = 0) { |
| constexpr int64_t counterReverse = endM * endK - counter; |
| constexpr int64_t startM = counterReverse / (endK); |
| constexpr int64_t startK = counterReverse % endK; |
| |
| constexpr int64_t packetIndex = startM * endK + startK; |
| constexpr int64_t startM_ = isFWDSolve ? startM : -startM; |
| const int64_t rhsIndex = (startK * PacketSize) + startM_ * LDB; |
| EIGEN_IF_CONSTEXPR(krem) { |
| RHSInPacket.packet[packetIndex] = ploadu<vec>(&B_arr[rhsIndex], remMask<PacketSize>(rem)); |
| } |
| else { |
| RHSInPacket.packet[packetIndex] = ploadu<vec>(&B_arr[rhsIndex]); |
| } |
| aux_loadRHS<isFWDSolve, endM, endK, counter - 1, krem>(B_arr, LDB, RHSInPacket, rem); |
| } |
| |
| template <bool isFWDSolve, int64_t endM, int64_t endK, int64_t counter, bool krem> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_loadRHS( |
| Scalar *B_arr, int64_t LDB, PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, int64_t rem = 0) { |
| EIGEN_UNUSED_VARIABLE(B_arr); |
| EIGEN_UNUSED_VARIABLE(LDB); |
| EIGEN_UNUSED_VARIABLE(RHSInPacket); |
| EIGEN_UNUSED_VARIABLE(rem); |
| } |
| |
| /** |
| * aux_storeRHS |
| * |
| * 2-D unroll |
| * for(startM = 0; startM < endM; startM++) |
| * for(startK = 0; startK < endK; startK++) |
| **/ |
| template <bool isFWDSolve, int64_t endM, int64_t endK, int64_t counter, bool krem> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_storeRHS( |
| Scalar *B_arr, int64_t LDB, PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, int64_t rem = 0) { |
| constexpr int64_t counterReverse = endM * endK - counter; |
| constexpr int64_t startM = counterReverse / (endK); |
| constexpr int64_t startK = counterReverse % endK; |
| |
| constexpr int64_t packetIndex = startM * endK + startK; |
| constexpr int64_t startM_ = isFWDSolve ? startM : -startM; |
| const int64_t rhsIndex = (startK * PacketSize) + startM_ * LDB; |
| EIGEN_IF_CONSTEXPR(krem) { |
| pstoreu<Scalar>(&B_arr[rhsIndex], RHSInPacket.packet[packetIndex], remMask<PacketSize>(rem)); |
| } |
| else { |
| pstoreu<Scalar>(&B_arr[rhsIndex], RHSInPacket.packet[packetIndex]); |
| } |
| aux_storeRHS<isFWDSolve, endM, endK, counter - 1, krem>(B_arr, LDB, RHSInPacket, rem); |
| } |
| |
| template <bool isFWDSolve, int64_t endM, int64_t endK, int64_t counter, bool krem> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_storeRHS( |
| Scalar *B_arr, int64_t LDB, PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, int64_t rem = 0) { |
| EIGEN_UNUSED_VARIABLE(B_arr); |
| EIGEN_UNUSED_VARIABLE(LDB); |
| EIGEN_UNUSED_VARIABLE(RHSInPacket); |
| EIGEN_UNUSED_VARIABLE(rem); |
| } |
| |
| /** |
| * aux_divRHSByDiag |
| * |
| * currM may be -1, (currM >=0) in enable_if checks for this |
| * |
| * 1-D unroll |
| * for(startK = 0; startK < endK; startK++) |
| **/ |
| template <int64_t currM, int64_t endK, int64_t counter> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0 && currM >= 0)> aux_divRHSByDiag( |
| PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, PacketBlock<vec, EIGEN_AVX_MAX_NUM_ROW> &AInPacket) { |
| constexpr int64_t counterReverse = endK - counter; |
| constexpr int64_t startK = counterReverse; |
| |
| constexpr int64_t packetIndex = currM * endK + startK; |
| RHSInPacket.packet[packetIndex] = pmul(AInPacket.packet[currM], RHSInPacket.packet[packetIndex]); |
| aux_divRHSByDiag<currM, endK, counter - 1>(RHSInPacket, AInPacket); |
| } |
| |
| template <int64_t currM, int64_t endK, int64_t counter> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<!(counter > 0 && currM >= 0)> aux_divRHSByDiag( |
| PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, PacketBlock<vec, EIGEN_AVX_MAX_NUM_ROW> &AInPacket) { |
| EIGEN_UNUSED_VARIABLE(RHSInPacket); |
| EIGEN_UNUSED_VARIABLE(AInPacket); |
| } |
| |
| /** |
| * aux_updateRHS |
| * |
| * 2-D unroll |
| * for(startM = initM; startM < endM; startM++) |
| * for(startK = 0; startK < endK; startK++) |
| **/ |
| template <bool isARowMajor, bool isFWDSolve, bool isUnitDiag, int64_t initM, int64_t endM, int64_t endK, |
| int64_t counter, int64_t currentM> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_updateRHS( |
| Scalar *A_arr, int64_t LDA, PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, |
| PacketBlock<vec, EIGEN_AVX_MAX_NUM_ROW> &AInPacket) { |
| constexpr int64_t counterReverse = (endM - initM) * endK - counter; |
| constexpr int64_t startM = initM + counterReverse / (endK); |
| constexpr int64_t startK = counterReverse % endK; |
| |
| // For each row of A, first update all corresponding RHS |
| constexpr int64_t packetIndex = startM * endK + startK; |
| EIGEN_IF_CONSTEXPR(currentM > 0) { |
| RHSInPacket.packet[packetIndex] = |
| pnmadd(AInPacket.packet[startM], RHSInPacket.packet[(currentM - 1) * endK + startK], |
| RHSInPacket.packet[packetIndex]); |
| } |
| |
| EIGEN_IF_CONSTEXPR(startK == endK - 1) { |
| // Once all RHS for previous row of A is updated, we broadcast the next element in the column A_{i, currentM}. |
| EIGEN_IF_CONSTEXPR(startM == currentM && !isUnitDiag) { |
| // If diagonal is not unit, we broadcast reciprocals of diagonals AinPacket.packet[currentM]. |
| // This will be used in divRHSByDiag |
| EIGEN_IF_CONSTEXPR(isFWDSolve) |
| AInPacket.packet[currentM] = pset1<vec>(Scalar(1) / A_arr[idA<isARowMajor>(currentM, currentM, LDA)]); |
| else AInPacket.packet[currentM] = pset1<vec>(Scalar(1) / A_arr[idA<isARowMajor>(-currentM, -currentM, LDA)]); |
| } |
| else { |
| // Broadcast next off diagonal element of A |
| EIGEN_IF_CONSTEXPR(isFWDSolve) |
| AInPacket.packet[startM] = pset1<vec>(A_arr[idA<isARowMajor>(startM, currentM, LDA)]); |
| else AInPacket.packet[startM] = pset1<vec>(A_arr[idA<isARowMajor>(-startM, -currentM, LDA)]); |
| } |
| } |
| |
| aux_updateRHS<isARowMajor, isFWDSolve, isUnitDiag, initM, endM, endK, counter - 1, currentM>( |
| A_arr, LDA, RHSInPacket, AInPacket); |
| } |
| |
| template <bool isARowMajor, bool isFWDSolve, bool isUnitDiag, int64_t initM, int64_t endM, int64_t endK, |
| int64_t counter, int64_t currentM> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_updateRHS( |
| Scalar *A_arr, int64_t LDA, PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, |
| PacketBlock<vec, EIGEN_AVX_MAX_NUM_ROW> &AInPacket) { |
| EIGEN_UNUSED_VARIABLE(A_arr); |
| EIGEN_UNUSED_VARIABLE(LDA); |
| EIGEN_UNUSED_VARIABLE(RHSInPacket); |
| EIGEN_UNUSED_VARIABLE(AInPacket); |
| } |
| |
| /** |
| * aux_triSolverMicroKernel |
| * |
| * 1-D unroll |
| * for(startM = 0; startM < endM; startM++) |
| **/ |
| template <bool isARowMajor, bool isFWDSolve, bool isUnitDiag, int64_t endM, int64_t counter, int64_t numK> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_triSolveMicroKernel( |
| Scalar *A_arr, int64_t LDA, PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, |
| PacketBlock<vec, EIGEN_AVX_MAX_NUM_ROW> &AInPacket) { |
| constexpr int64_t counterReverse = endM - counter; |
| constexpr int64_t startM = counterReverse; |
| |
| constexpr int64_t currentM = startM; |
| // Divides the right-hand side in row startM, by digonal value of A |
| // broadcasted to AInPacket.packet[startM-1] in the previous iteration. |
| // |
| // Without "if constexpr" the compiler instantiates the case <-1, numK> |
| // this is handled with enable_if to prevent out-of-bound warnings |
| // from the compiler |
| EIGEN_IF_CONSTEXPR(!isUnitDiag && startM > 0) |
| trsm::template divRHSByDiag<startM - 1, numK>(RHSInPacket, AInPacket); |
| |
| // After division, the rhs corresponding to subsequent rows of A can be partially updated |
| // We also broadcast the reciprocal of the next diagonal to AInPacket.packet[currentM] (if needed) |
| // to be used in the next iteration. |
| trsm::template updateRHS<isARowMajor, isFWDSolve, isUnitDiag, startM, endM, numK, currentM>(A_arr, LDA, RHSInPacket, |
| AInPacket); |
| |
| // Handle division for the RHS corresponding to the final row of A. |
| EIGEN_IF_CONSTEXPR(!isUnitDiag && startM == endM - 1) |
| trsm::template divRHSByDiag<startM, numK>(RHSInPacket, AInPacket); |
| |
| aux_triSolveMicroKernel<isARowMajor, isFWDSolve, isUnitDiag, endM, counter - 1, numK>(A_arr, LDA, RHSInPacket, |
| AInPacket); |
| } |
| |
| template <bool isARowMajor, bool isFWDSolve, bool isUnitDiag, int64_t endM, int64_t counter, int64_t numK> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_triSolveMicroKernel( |
| Scalar *A_arr, int64_t LDA, PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, |
| PacketBlock<vec, EIGEN_AVX_MAX_NUM_ROW> &AInPacket) { |
| EIGEN_UNUSED_VARIABLE(A_arr); |
| EIGEN_UNUSED_VARIABLE(LDA); |
| EIGEN_UNUSED_VARIABLE(RHSInPacket); |
| EIGEN_UNUSED_VARIABLE(AInPacket); |
| } |
| |
| /******************************************************** |
| * Wrappers for aux_XXXX to hide counter parameter |
| ********************************************************/ |
| |
| /** |
| * Load endMxendK block of B to RHSInPacket |
| * Masked loads are used for cases where endK is not a multiple of PacketSize |
| */ |
| template <bool isFWDSolve, int64_t endM, int64_t endK, bool krem = false> |
| static EIGEN_ALWAYS_INLINE void loadRHS(Scalar *B_arr, int64_t LDB, |
| PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, int64_t rem = 0) { |
| aux_loadRHS<isFWDSolve, endM, endK, endM * endK, krem>(B_arr, LDB, RHSInPacket, rem); |
| } |
| |
| /** |
| * Load endMxendK block of B to RHSInPacket |
| * Masked loads are used for cases where endK is not a multiple of PacketSize |
| */ |
| template <bool isFWDSolve, int64_t endM, int64_t endK, bool krem = false> |
| static EIGEN_ALWAYS_INLINE void storeRHS(Scalar *B_arr, int64_t LDB, |
| PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, int64_t rem = 0) { |
| aux_storeRHS<isFWDSolve, endM, endK, endM * endK, krem>(B_arr, LDB, RHSInPacket, rem); |
| } |
| |
| /** |
| * Only used if Triangular matrix has non-unit diagonal values |
| */ |
| template <int64_t currM, int64_t endK> |
| static EIGEN_ALWAYS_INLINE void divRHSByDiag(PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, |
| PacketBlock<vec, EIGEN_AVX_MAX_NUM_ROW> &AInPacket) { |
| aux_divRHSByDiag<currM, endK, endK>(RHSInPacket, AInPacket); |
| } |
| |
| /** |
| * Update right-hand sides (stored in avx registers) |
| * Traversing along the column A_{i,currentM}, where currentM <= i <= endM, and broadcasting each value to AInPacket. |
| **/ |
| template <bool isARowMajor, bool isFWDSolve, bool isUnitDiag, int64_t startM, int64_t endM, int64_t endK, |
| int64_t currentM> |
| static EIGEN_ALWAYS_INLINE void updateRHS(Scalar *A_arr, int64_t LDA, |
| PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, |
| PacketBlock<vec, EIGEN_AVX_MAX_NUM_ROW> &AInPacket) { |
| aux_updateRHS<isARowMajor, isFWDSolve, isUnitDiag, startM, endM, endK, (endM - startM) * endK, currentM>( |
| A_arr, LDA, RHSInPacket, AInPacket); |
| } |
| |
| /** |
| * endM: dimension of A. 1 <= endM <= EIGEN_AVX_MAX_NUM_ROW |
| * numK: number of avx registers to use for each row of B (ex fp32: 48 rhs => 3 avx reg used). 1 <= endK <= 3. |
| * isFWDSolve: true => forward substitution, false => backwards substitution |
| * isUnitDiag: true => triangular matrix has unit diagonal. |
| */ |
| template <bool isARowMajor, bool isFWDSolve, bool isUnitDiag, int64_t endM, int64_t numK> |
| static EIGEN_ALWAYS_INLINE void triSolveMicroKernel(Scalar *A_arr, int64_t LDA, |
| PacketBlock<vec, EIGEN_AVX_MAX_NUM_ACC> &RHSInPacket, |
| PacketBlock<vec, EIGEN_AVX_MAX_NUM_ROW> &AInPacket) { |
| static_assert(numK >= 1 && numK <= 3, "numK out of range"); |
| aux_triSolveMicroKernel<isARowMajor, isFWDSolve, isUnitDiag, endM, endM, numK>(A_arr, LDA, RHSInPacket, AInPacket); |
| } |
| }; |
| |
| /** |
| * Unrolls for gemm kernel |
| * |
| * isAdd: true => C += A*B, false => C -= A*B |
| */ |
| template <typename Scalar, bool isAdd> |
| class gemm { |
| public: |
| using vec = typename std::conditional<std::is_same<Scalar, float>::value, vecFullFloat, vecFullDouble>::type; |
| static constexpr int64_t PacketSize = packet_traits<Scalar>::size; |
| |
| /*********************************** |
| * Auxillary Functions for: |
| * - setzero |
| * - updateC |
| * - storeC |
| * - startLoadB |
| * - triSolveMicroKernel |
| ************************************/ |
| |
| /** |
| * aux_setzero |
| * |
| * 2-D unroll |
| * for(startM = 0; startM < endM; startM++) |
| * for(startN = 0; startN < endN; startN++) |
| **/ |
| template <int64_t endM, int64_t endN, int64_t counter> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_setzero( |
| PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm) { |
| constexpr int64_t counterReverse = endM * endN - counter; |
| constexpr int64_t startM = counterReverse / (endN); |
| constexpr int64_t startN = counterReverse % endN; |
| |
| zmm.packet[startN * endM + startM] = pzero(zmm.packet[startN * endM + startM]); |
| aux_setzero<endM, endN, counter - 1>(zmm); |
| } |
| |
| template <int64_t endM, int64_t endN, int64_t counter> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_setzero( |
| PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm) { |
| EIGEN_UNUSED_VARIABLE(zmm); |
| } |
| |
| /** |
| * aux_updateC |
| * |
| * 2-D unroll |
| * for(startM = 0; startM < endM; startM++) |
| * for(startN = 0; startN < endN; startN++) |
| **/ |
| template <int64_t endM, int64_t endN, int64_t counter, bool rem> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_updateC( |
| Scalar *C_arr, int64_t LDC, PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(rem_); |
| constexpr int64_t counterReverse = endM * endN - counter; |
| constexpr int64_t startM = counterReverse / (endN); |
| constexpr int64_t startN = counterReverse % endN; |
| |
| EIGEN_IF_CONSTEXPR(rem) |
| zmm.packet[startN * endM + startM] = |
| padd(ploadu<vec>(&C_arr[(startN)*LDC + startM * PacketSize], remMask<PacketSize>(rem_)), |
| zmm.packet[startN * endM + startM], remMask<PacketSize>(rem_)); |
| else zmm.packet[startN * endM + startM] = |
| padd(ploadu<vec>(&C_arr[(startN)*LDC + startM * PacketSize]), zmm.packet[startN * endM + startM]); |
| aux_updateC<endM, endN, counter - 1, rem>(C_arr, LDC, zmm, rem_); |
| } |
| |
| template <int64_t endM, int64_t endN, int64_t counter, bool rem> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_updateC( |
| Scalar *C_arr, int64_t LDC, PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(C_arr); |
| EIGEN_UNUSED_VARIABLE(LDC); |
| EIGEN_UNUSED_VARIABLE(zmm); |
| EIGEN_UNUSED_VARIABLE(rem_); |
| } |
| |
| /** |
| * aux_storeC |
| * |
| * 2-D unroll |
| * for(startM = 0; startM < endM; startM++) |
| * for(startN = 0; startN < endN; startN++) |
| **/ |
| template <int64_t endM, int64_t endN, int64_t counter, bool rem> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_storeC( |
| Scalar *C_arr, int64_t LDC, PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(rem_); |
| constexpr int64_t counterReverse = endM * endN - counter; |
| constexpr int64_t startM = counterReverse / (endN); |
| constexpr int64_t startN = counterReverse % endN; |
| |
| EIGEN_IF_CONSTEXPR(rem) |
| pstoreu<Scalar>(&C_arr[(startN)*LDC + startM * PacketSize], zmm.packet[startN * endM + startM], |
| remMask<PacketSize>(rem_)); |
| else pstoreu<Scalar>(&C_arr[(startN)*LDC + startM * PacketSize], zmm.packet[startN * endM + startM]); |
| aux_storeC<endM, endN, counter - 1, rem>(C_arr, LDC, zmm, rem_); |
| } |
| |
| template <int64_t endM, int64_t endN, int64_t counter, bool rem> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_storeC( |
| Scalar *C_arr, int64_t LDC, PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(C_arr); |
| EIGEN_UNUSED_VARIABLE(LDC); |
| EIGEN_UNUSED_VARIABLE(zmm); |
| EIGEN_UNUSED_VARIABLE(rem_); |
| } |
| |
| /** |
| * aux_startLoadB |
| * |
| * 1-D unroll |
| * for(startL = 0; startL < endL; startL++) |
| **/ |
| template <int64_t unrollM, int64_t unrollN, int64_t endL, int64_t counter, bool rem> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_startLoadB( |
| Scalar *B_t, int64_t LDB, PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(rem_); |
| constexpr int64_t counterReverse = endL - counter; |
| constexpr int64_t startL = counterReverse; |
| |
| EIGEN_IF_CONSTEXPR(rem) |
| zmm.packet[unrollM * unrollN + startL] = |
| ploadu<vec>(&B_t[(startL / unrollM) * LDB + (startL % unrollM) * PacketSize], remMask<PacketSize>(rem_)); |
| else zmm.packet[unrollM * unrollN + startL] = |
| ploadu<vec>(&B_t[(startL / unrollM) * LDB + (startL % unrollM) * PacketSize]); |
| |
| aux_startLoadB<unrollM, unrollN, endL, counter - 1, rem>(B_t, LDB, zmm, rem_); |
| } |
| |
| template <int64_t unrollM, int64_t unrollN, int64_t endL, int64_t counter, bool rem> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_startLoadB( |
| Scalar *B_t, int64_t LDB, PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(B_t); |
| EIGEN_UNUSED_VARIABLE(LDB); |
| EIGEN_UNUSED_VARIABLE(zmm); |
| EIGEN_UNUSED_VARIABLE(rem_); |
| } |
| |
| /** |
| * aux_startBCastA |
| * |
| * 1-D unroll |
| * for(startB = 0; startB < endB; startB++) |
| **/ |
| template <bool isARowMajor, int64_t unrollM, int64_t unrollN, int64_t endB, int64_t counter, int64_t numLoad> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_startBCastA( |
| Scalar *A_t, int64_t LDA, PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm) { |
| constexpr int64_t counterReverse = endB - counter; |
| constexpr int64_t startB = counterReverse; |
| |
| zmm.packet[unrollM * unrollN + numLoad + startB] = pload1<vec>(&A_t[idA<isARowMajor>(startB, 0, LDA)]); |
| |
| aux_startBCastA<isARowMajor, unrollM, unrollN, endB, counter - 1, numLoad>(A_t, LDA, zmm); |
| } |
| |
| template <bool isARowMajor, int64_t unrollM, int64_t unrollN, int64_t endB, int64_t counter, int64_t numLoad> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_startBCastA( |
| Scalar *A_t, int64_t LDA, PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm) { |
| EIGEN_UNUSED_VARIABLE(A_t); |
| EIGEN_UNUSED_VARIABLE(LDA); |
| EIGEN_UNUSED_VARIABLE(zmm); |
| } |
| |
| /** |
| * aux_loadB |
| * currK: current K |
| * |
| * 1-D unroll |
| * for(startM = 0; startM < endM; startM++) |
| **/ |
| template <int64_t endM, int64_t counter, int64_t unrollN, int64_t currK, int64_t unrollK, int64_t numLoad, |
| int64_t numBCast, bool rem> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_loadB( |
| Scalar *B_t, int64_t LDB, PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(rem_); |
| if ((numLoad / endM + currK < unrollK)) { |
| constexpr int64_t counterReverse = endM - counter; |
| constexpr int64_t startM = counterReverse; |
| |
| EIGEN_IF_CONSTEXPR(rem) { |
| zmm.packet[endM * unrollN + (startM + currK * endM) % numLoad] = |
| ploadu<vec>(&B_t[(numLoad / endM + currK) * LDB + startM * PacketSize], remMask<PacketSize>(rem_)); |
| } |
| else { |
| zmm.packet[endM * unrollN + (startM + currK * endM) % numLoad] = |
| ploadu<vec>(&B_t[(numLoad / endM + currK) * LDB + startM * PacketSize]); |
| } |
| |
| aux_loadB<endM, counter - 1, unrollN, currK, unrollK, numLoad, numBCast, rem>(B_t, LDB, zmm, rem_); |
| } |
| } |
| |
| template <int64_t endM, int64_t counter, int64_t unrollN, int64_t currK, int64_t unrollK, int64_t numLoad, |
| int64_t numBCast, bool rem> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_loadB( |
| Scalar *B_t, int64_t LDB, PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(B_t); |
| EIGEN_UNUSED_VARIABLE(LDB); |
| EIGEN_UNUSED_VARIABLE(zmm); |
| EIGEN_UNUSED_VARIABLE(rem_); |
| } |
| |
| /** |
| * aux_microKernel |
| * |
| * 3-D unroll |
| * for(startM = 0; startM < endM; startM++) |
| * for(startN = 0; startN < endN; startN++) |
| * for(startK = 0; startK < endK; startK++) |
| **/ |
| template <bool isARowMajor, int64_t endM, int64_t endN, int64_t endK, int64_t counter, int64_t numLoad, |
| int64_t numBCast, bool rem> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter > 0)> aux_microKernel( |
| Scalar *B_t, Scalar *A_t, int64_t LDB, int64_t LDA, PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, |
| int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(rem_); |
| constexpr int64_t counterReverse = endM * endN * endK - counter; |
| constexpr int startK = counterReverse / (endM * endN); |
| constexpr int startN = (counterReverse / (endM)) % endN; |
| constexpr int startM = counterReverse % endM; |
| |
| EIGEN_IF_CONSTEXPR(startK == 0 && startM == 0 && startN == 0) { |
| gemm::template startLoadB<endM, endN, numLoad, rem>(B_t, LDB, zmm, rem_); |
| gemm::template startBCastA<isARowMajor, endM, endN, numBCast, numLoad>(A_t, LDA, zmm); |
| } |
| |
| { |
| // Interleave FMA and Bcast |
| EIGEN_IF_CONSTEXPR(isAdd) { |
| zmm.packet[startN * endM + startM] = |
| pmadd(zmm.packet[endM * endN + numLoad + (startN + startK * endN) % numBCast], |
| zmm.packet[endM * endN + (startM + startK * endM) % numLoad], zmm.packet[startN * endM + startM]); |
| } |
| else { |
| zmm.packet[startN * endM + startM] = |
| pnmadd(zmm.packet[endM * endN + numLoad + (startN + startK * endN) % numBCast], |
| zmm.packet[endM * endN + (startM + startK * endM) % numLoad], zmm.packet[startN * endM + startM]); |
| } |
| // Bcast |
| EIGEN_IF_CONSTEXPR(startM == endM - 1 && (numBCast + startN + startK * endN < endK * endN)) { |
| zmm.packet[endM * endN + numLoad + (startN + startK * endN) % numBCast] = pload1<vec>(&A_t[idA<isARowMajor>( |
| (numBCast + startN + startK * endN) % endN, (numBCast + startN + startK * endN) / endN, LDA)]); |
| } |
| } |
| |
| // We have updated all accumlators, time to load next set of B's |
| EIGEN_IF_CONSTEXPR((startN == endN - 1) && (startM == endM - 1)) { |
| gemm::template loadB<endM, endN, startK, endK, numLoad, numBCast, rem>(B_t, LDB, zmm, rem_); |
| } |
| aux_microKernel<isARowMajor, endM, endN, endK, counter - 1, numLoad, numBCast, rem>(B_t, A_t, LDB, LDA, zmm, rem_); |
| } |
| |
| template <bool isARowMajor, int64_t endM, int64_t endN, int64_t endK, int64_t counter, int64_t numLoad, |
| int64_t numBCast, bool rem> |
| static EIGEN_ALWAYS_INLINE std::enable_if_t<(counter <= 0)> aux_microKernel( |
| Scalar *B_t, Scalar *A_t, int64_t LDB, int64_t LDA, PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, |
| int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(B_t); |
| EIGEN_UNUSED_VARIABLE(A_t); |
| EIGEN_UNUSED_VARIABLE(LDB); |
| EIGEN_UNUSED_VARIABLE(LDA); |
| EIGEN_UNUSED_VARIABLE(zmm); |
| EIGEN_UNUSED_VARIABLE(rem_); |
| } |
| |
| /******************************************************** |
| * Wrappers for aux_XXXX to hide counter parameter |
| ********************************************************/ |
| |
| template <int64_t endM, int64_t endN> |
| static EIGEN_ALWAYS_INLINE void setzero(PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm) { |
| aux_setzero<endM, endN, endM * endN>(zmm); |
| } |
| |
| /** |
| * Ideally the compiler folds these into vaddp{s,d} with an embedded memory load. |
| */ |
| template <int64_t endM, int64_t endN, bool rem = false> |
| static EIGEN_ALWAYS_INLINE void updateC(Scalar *C_arr, int64_t LDC, |
| PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, |
| int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(rem_); |
| aux_updateC<endM, endN, endM * endN, rem>(C_arr, LDC, zmm, rem_); |
| } |
| |
| template <int64_t endM, int64_t endN, bool rem = false> |
| static EIGEN_ALWAYS_INLINE void storeC(Scalar *C_arr, int64_t LDC, |
| PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, |
| int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(rem_); |
| aux_storeC<endM, endN, endM * endN, rem>(C_arr, LDC, zmm, rem_); |
| } |
| |
| /** |
| * Use numLoad registers for loading B at start of microKernel |
| */ |
| template <int64_t unrollM, int64_t unrollN, int64_t endL, bool rem> |
| static EIGEN_ALWAYS_INLINE void startLoadB(Scalar *B_t, int64_t LDB, |
| PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, |
| int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(rem_); |
| aux_startLoadB<unrollM, unrollN, endL, endL, rem>(B_t, LDB, zmm, rem_); |
| } |
| |
| /** |
| * Use numBCast registers for broadcasting A at start of microKernel |
| */ |
| template <bool isARowMajor, int64_t unrollM, int64_t unrollN, int64_t endB, int64_t numLoad> |
| static EIGEN_ALWAYS_INLINE void startBCastA(Scalar *A_t, int64_t LDA, |
| PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm) { |
| aux_startBCastA<isARowMajor, unrollM, unrollN, endB, endB, numLoad>(A_t, LDA, zmm); |
| } |
| |
| /** |
| * Loads next set of B into vector registers between each K unroll. |
| */ |
| template <int64_t endM, int64_t unrollN, int64_t currK, int64_t unrollK, int64_t numLoad, int64_t numBCast, bool rem> |
| static EIGEN_ALWAYS_INLINE void loadB(Scalar *B_t, int64_t LDB, |
| PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, |
| int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(rem_); |
| aux_loadB<endM, endM, unrollN, currK, unrollK, numLoad, numBCast, rem>(B_t, LDB, zmm, rem_); |
| } |
| |
| /** |
| * Generates a microkernel for gemm (row-major) with unrolls {1,2,4,8}x{U1,U2,U3} to compute C -= A*B. |
| * A matrix can be row/col-major. B matrix is assumed row-major. |
| * |
| * isARowMajor: is A row major |
| * endM: Number registers per row |
| * endN: Number of rows |
| * endK: Loop unroll for K. |
| * numLoad: Number of registers for loading B. |
| * numBCast: Number of registers for broadcasting A. |
| * |
| * Ex: microkernel<isARowMajor,0,3,0,4,0,4,6,2>: 8x48 unroll (24 accumulators), k unrolled 4 times, |
| * 6 register for loading B, 2 for broadcasting A. |
| * |
| * Note: Ideally the microkernel should not have any register spilling. |
| * The avx instruction counts should be: |
| * - endK*endN vbroadcasts{s,d} |
| * - endK*endM vmovup{s,d} |
| * - endK*endN*endM FMAs |
| * |
| * From testing, there are no register spills with clang. There are register spills with GNU, which |
| * causes a performance hit. |
| */ |
| template <bool isARowMajor, int64_t endM, int64_t endN, int64_t endK, int64_t numLoad, int64_t numBCast, |
| bool rem = false> |
| static EIGEN_ALWAYS_INLINE void microKernel(Scalar *B_t, Scalar *A_t, int64_t LDB, int64_t LDA, |
| PacketBlock<vec, EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS> &zmm, |
| int64_t rem_ = 0) { |
| EIGEN_UNUSED_VARIABLE(rem_); |
| aux_microKernel<isARowMajor, endM, endN, endK, endM * endN * endK, numLoad, numBCast, rem>(B_t, A_t, LDB, LDA, zmm, |
| rem_); |
| } |
| }; |
| } // namespace unrolls |
| |
| #endif // EIGEN_CORE_ARCH_AVX512_TRSM_UNROLLS_H |
