| // Copyright 2018 The Gemmlowp Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| // kernel_msa.h: a collection of MSA optimized kernels. |
| // Check in kernel_default.h which one(s) are actually used by default. |
| // Others are mere experiments; they are still covered by tests |
| // in case they might be useful some day. |
| |
| #ifndef GEMMLOWP_INTERNAL_KERNEL_MSA_H_ |
| #define GEMMLOWP_INTERNAL_KERNEL_MSA_H_ |
| |
| #include "kernel.h" |
| |
| #include <msa.h> |
| #include <cassert> |
| |
| namespace gemmlowp { |
| |
| #ifdef GEMMLOWP_MSA |
| |
| // Some convenience macros to hide differences between MIPS32 and MIPS64. |
| #ifdef GEMMLOWP_MIPS_64 |
| #define GEMMLOWP_MIPS_XADDU "daddu" |
| #define GEMMLOWP_MIPS_XADDIU "daddiu" |
| #define GEMMLOWP_MIPS_XSLL "dsll" |
| #else |
| #define GEMMLOWP_MIPS_XADDU "addu" |
| #define GEMMLOWP_MIPS_XADDIU "addiu" |
| #define GEMMLOWP_MIPS_XSLL "sll" |
| #endif |
| |
| // Our main GEMM kernel. |
| struct MSA_Kernel12x8Depth2 : KernelBase { |
| typedef KernelFormat<KernelSideFormat<CellFormat<4, 2, CellOrder::WidthMajor>, 3>, |
| KernelSideFormat<CellFormat<4, 2, CellOrder::WidthMajor>, 2> > |
| Format; |
| |
| const char* Name() const override { return "MSA, 12x8, depth 2"; } |
| |
| // TODO(benoitjacob): reorder function arguments so dst comes last |
| void Run(std::int32_t* dst_ptr, std::size_t dst_row_stride, |
| std::size_t dst_col_stride, const std::uint8_t* lhs_ptr, |
| const std::uint8_t* rhs_ptr, std::size_t start_depth, |
| std::size_t run_depth) const override { |
| ScopedProfilingLabel label("optimized kernel (MSA 12x8)"); |
| // See comments above for why we need local numerical labels in our asm. |
| #define GEMMLOWP_LABEL_CLEAR_ACCUMULATORS "1" |
| #define GEMMLOWP_LABEL_BEFORE_LOOP "2" |
| #define GEMMLOWP_LABEL_LOOP "3" |
| #define GEMMLOWP_LABEL_AFTER_LOOP "4" |
| |
| assert(dst_row_stride == 1); |
| asm volatile( |
| // Multiply dst_col_stride by 4 == sizeof(int32) to use |
| // it as a byte offset below. |
| GEMMLOWP_MIPS_XSLL |
| " %[dst_col_stride], %[dst_col_stride], 2\n" |
| |
| // Check if start_depth==0 to decide whether we will clear |
| // accumulators or load existing accumulators. |
| "beqz %[start_depth], " GEMMLOWP_LABEL_CLEAR_ACCUMULATORS "f\n" |
| |
| // Load accumulators (start_depth != 0). |
| GEMMLOWP_MIPS_XADDU " $a0, %[dst_ptr], %[dst_col_stride]\n" |
| "ld.w $w0, (0*16)(%[dst_ptr])\n" |
| "ld.w $w4, (1*16)(%[dst_ptr])\n" |
| "ld.w $w8, (2*16)(%[dst_ptr])\n" GEMMLOWP_MIPS_XADDU " $a1, $a0, %[dst_col_stride]\n" |
| "ld.w $w1, (0*16)($a0)\n" |
| "ld.w $w5, (1*16)($a0)\n" |
| "ld.w $w9, (2*16)($a0)\n" GEMMLOWP_MIPS_XADDU " $a0, $a1, %[dst_col_stride]\n" |
| "ld.w $w2, (0*16)($a1)\n" |
| "ld.w $w6, (1*16)($a1)\n" |
| "ld.w $w10, (2*16)($a1)\n" GEMMLOWP_MIPS_XADDU " $a1, $a0, %[dst_col_stride]\n" |
| "ld.w $w3, (0*16)($a0)\n" |
| "ld.w $w7, (1*16)($a0)\n" |
| "ld.w $w11, (2*16)($a0)\n" GEMMLOWP_MIPS_XADDU " $a0, $a1, %[dst_col_stride]\n" |
| "ld.w $w12, (0*16)($a1)\n" |
| "ld.w $w16, (1*16)($a1)\n" |
| "ld.w $w20, (2*16)($a1)\n" GEMMLOWP_MIPS_XADDU " $a1, $a0, %[dst_col_stride]\n" |
| "ld.w $w13, (0*16)($a0)\n" |
| "ld.w $w17, (1*16)($a0)\n" |
| "ld.w $w21, (2*16)($a0)\n" GEMMLOWP_MIPS_XADDU " $a0, $a1, %[dst_col_stride]\n" |
| "ld.w $w14, (0*16)($a1)\n" |
| "ld.w $w18, (1*16)($a1)\n" |
| "ld.w $w22, (2*16)($a1)\n" |
| "ld.w $w15, (0*16)($a0)\n" |
| "ld.w $w19, (1*16)($a0)\n" |
| "ld.w $w23, (2*16)($a0)\n" |
| "b " GEMMLOWP_LABEL_BEFORE_LOOP "f\n" |
| |
| GEMMLOWP_LABEL_CLEAR_ACCUMULATORS ":\n" |
| // Clear accumulators (start_depth == 0). |
| "ldi.w $w0, 0\n" |
| "ldi.w $w4, 0\n" |
| "ldi.w $w8, 0\n" |
| "ldi.w $w1, 0\n" |
| "ldi.w $w5, 0\n" |
| "ldi.w $w9, 0\n" |
| "ldi.w $w2, 0\n" |
| "ldi.w $w6, 0\n" |
| "ldi.w $w10, 0\n" |
| "ldi.w $w3, 0\n" |
| "ldi.w $w7, 0\n" |
| "ldi.w $w11, 0\n" |
| "ldi.w $w12, 0\n" |
| "ldi.w $w16, 0\n" |
| "ldi.w $w20, 0\n" |
| "ldi.w $w13, 0\n" |
| "ldi.w $w17, 0\n" |
| "ldi.w $w21, 0\n" |
| "ldi.w $w14, 0\n" |
| "ldi.w $w18, 0\n" |
| "ldi.w $w22, 0\n" |
| "ldi.w $w15, 0\n" |
| "ldi.w $w19, 0\n" |
| "ldi.w $w23, 0\n" |
| |
| GEMMLOWP_LABEL_BEFORE_LOOP ":\n" |
| |
| GEMMLOWP_LABEL_LOOP ":\n" |
| // Overview of register layout: |
| // |
| // A half of the 2 2x4 cells of Rhs is stored in 16bit in w28-w31 |
| // (each register contains 4 replicas of a pair of elements). |
| // A 12x2 block of 3 4x2 cells Lhs is stored in 16bit in w24-w26. |
| // A 12x8 block of accumulators is stored in 32bit in w0-w23. |
| // |
| // +------+------+------+------+ |
| // Rhs |w28 |w29 |w30 |w31 | |
| // +------+------+------+------+ |
| // |
| // | | | | | |
| // |
| // Lhs | | | | | |
| // |
| // +---+ - - - - +------+------+------+------+ |
| // |w24| |w0/12 |w1/13 |w2/14 |w3/15 | |
| // |w24| |w0/12 |w1/13 |w2/14 |w3/15 | |
| // |w24| |w0/12 |w1/13 |w2/14 |w3/15 | |
| // |w24| |w0/12 |w1/13 |w2/14 |w3/15 | |
| // +---+ - - - - +------+------+------+------+ |
| // |w25| |w4/16 |w5/17 |w6/18 |w7/19 | |
| // |w25| |w4/16 |w5/17 |w6/18 |w7/19 | |
| // |w25| |w4/16 |w5/17 |w6/18 |w7/19 | |
| // |w25| |w4/16 |w5/17 |w6/18 |w7/19 | |
| // +---+ - - - - +------+------+------+------+ |
| // |w26| |w8/20 |w9/21 |w10/22|w11/23| |
| // |w26| |w8/20 |w9/21 |w10/22|w11/23| |
| // |w26| |w8/20 |w9/21 |w10/22|w11/23| |
| // |w26| |w8/20 |w9/21 |w10/22|w11/23| |
| // +---+ - - - - +------+------+------+------+ |
| // |
| // Accumulators |
| |
| // Load 3 x 8 bytes of lhs[] with 2 16-byte overlapped loads. |
| "ld.b $w24, 0(%[lhs_ptr])\n" |
| "ld.b $w25, 8(%[lhs_ptr])\n" |
| |
| // Load 2 x 8 bytes of rhs[]. |
| "ld.b $w27, 0(%[rhs_ptr])\n" |
| |
| // Zero-extend 8-bit elements of lhs[] to 16 bits. |
| "ldi.b $w31, 0\n" |
| "ilvr.b $w24, $w31, $w24\n" |
| "ilvl.b $w26, $w31, $w25\n" |
| "ilvr.b $w25, $w31, $w25\n" |
| |
| // First half of depths 0 and 1. |
| // Zero-extend 8-bit elements of rhs[] to 16 bits. |
| "ilvr.b $w31, $w31, $w27\n" |
| // Make 4 replicas of every pair of rhs[] elements. |
| "splati.w $w28, $w31[0]\n" |
| "splati.w $w29, $w31[1]\n" |
| "splati.w $w30, $w31[2]\n" |
| "splati.w $w31, $w31[3]\n" |
| // Dot-product-(and)-add doubles multiplicand width. |
| "dpadd_u.w $w0, $w24, $w28\n" |
| "dpadd_u.w $w4, $w25, $w28\n" |
| "dpadd_u.w $w8, $w26, $w28\n" |
| "dpadd_u.w $w1, $w24, $w29\n" |
| "dpadd_u.w $w5, $w25, $w29\n" |
| "dpadd_u.w $w9, $w26, $w29\n" |
| "dpadd_u.w $w2, $w24, $w30\n" |
| "dpadd_u.w $w6, $w25, $w30\n" |
| "dpadd_u.w $w10, $w26, $w30\n" |
| "dpadd_u.w $w3, $w24, $w31\n" |
| "dpadd_u.w $w7, $w25, $w31\n" |
| "dpadd_u.w $w11, $w26, $w31\n" |
| |
| // Second half of depths 0 and 1. |
| // Zero-extend 8-bit elements of rhs[] to 16 bits. |
| "ldi.b $w31, 0\n" |
| "ilvl.b $w31, $w31, $w27\n" |
| // Make 4 replicas of every pair of rhs[] elements. |
| "splati.w $w28, $w31[0]\n" |
| "splati.w $w29, $w31[1]\n" |
| "splati.w $w30, $w31[2]\n" |
| "splati.w $w31, $w31[3]\n" |
| // Dot-product-(and)-add doubles multiplicand width. |
| "dpadd_u.w $w12, $w24, $w28\n" |
| "dpadd_u.w $w16, $w25, $w28\n" |
| "dpadd_u.w $w20, $w26, $w28\n" |
| "dpadd_u.w $w13, $w24, $w29\n" |
| "dpadd_u.w $w17, $w25, $w29\n" |
| "dpadd_u.w $w21, $w26, $w29\n" |
| "dpadd_u.w $w14, $w24, $w30\n" |
| "dpadd_u.w $w18, $w25, $w30\n" |
| "dpadd_u.w $w22, $w26, $w30\n" |
| "dpadd_u.w $w15, $w24, $w31\n" |
| "dpadd_u.w $w19, $w25, $w31\n" |
| "dpadd_u.w $w23, $w26, $w31\n" |
| |
| GEMMLOWP_MIPS_XADDIU " %[run_depth], -2\n" GEMMLOWP_MIPS_XADDIU |
| " %[lhs_ptr], 24\n" GEMMLOWP_MIPS_XADDIU " %[rhs_ptr], 16\n" |
| "bnez %[run_depth]," GEMMLOWP_LABEL_LOOP "b\n" |
| |
| GEMMLOWP_LABEL_AFTER_LOOP ":\n" |
| |
| // Store accumulators. |
| GEMMLOWP_MIPS_XADDU " $a0, %[dst_ptr], %[dst_col_stride]\n" |
| "st.w $w0, (0*16)(%[dst_ptr])\n" |
| "st.w $w4, (1*16)(%[dst_ptr])\n" |
| "st.w $w8, (2*16)(%[dst_ptr])\n" GEMMLOWP_MIPS_XADDU " $a1, $a0, %[dst_col_stride]\n" |
| "st.w $w1, (0*16)($a0)\n" |
| "st.w $w5, (1*16)($a0)\n" |
| "st.w $w9, (2*16)($a0)\n" GEMMLOWP_MIPS_XADDU " $a0, $a1, %[dst_col_stride]\n" |
| "st.w $w2, (0*16)($a1)\n" |
| "st.w $w6, (1*16)($a1)\n" |
| "st.w $w10, (2*16)($a1)\n" GEMMLOWP_MIPS_XADDU " $a1, $a0, %[dst_col_stride]\n" |
| "st.w $w3, (0*16)($a0)\n" |
| "st.w $w7, (1*16)($a0)\n" |
| "st.w $w11, (2*16)($a0)\n" GEMMLOWP_MIPS_XADDU " $a0, $a1, %[dst_col_stride]\n" |
| "st.w $w12, (0*16)($a1)\n" |
| "st.w $w16, (1*16)($a1)\n" |
| "st.w $w20, (2*16)($a1)\n" GEMMLOWP_MIPS_XADDU " $a1, $a0, %[dst_col_stride]\n" |
| "st.w $w13, (0*16)($a0)\n" |
| "st.w $w17, (1*16)($a0)\n" |
| "st.w $w21, (2*16)($a0)\n" GEMMLOWP_MIPS_XADDU " $a0, $a1, %[dst_col_stride]\n" |
| "st.w $w14, (0*16)($a1)\n" |
| "st.w $w18, (1*16)($a1)\n" |
| "st.w $w22, (2*16)($a1)\n" |
| "st.w $w15, (0*16)($a0)\n" |
| "st.w $w19, (1*16)($a0)\n" |
| "st.w $w23, (2*16)($a0)\n" |
| : // outputs |
| [lhs_ptr] "+r"(lhs_ptr), [rhs_ptr] "+r"(rhs_ptr), [run_depth] "+r"(run_depth), |
| [dst_col_stride] "+r"(dst_col_stride) |
| : // inputs |
| [dst_ptr] "r"(dst_ptr), |
| [start_depth] "r"(start_depth) |
| : // clobbers |
| "memory", "a0", "a1", "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", "$f8", "$f9", |
| "$f10", "$f11", "$f12", "$f13", "$f14", "$f15", "$f16", "$f17", "$f18", "$f19", "$f20", |
| "$f21", "$f22", "$f23", "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31"); |
| |
| #undef GEMMLOWP_LABEL_CLEAR_ACCUMULATORS |
| #undef GEMMLOWP_LABEL_BEFORE_LOOP |
| #undef GEMMLOWP_LABEL_LOOP |
| #undef GEMMLOWP_LABEL_AFTER_LOOP |
| } |
| }; |
| |
| // Fast kernel operating on int8 operands. |
| // It is assumed that one of the two int8 operands only takes values |
| // in [-127, 127], while the other may freely range in [-128, 127]. |
| // The issue with both operands taking the value -128 is that: |
| // -128*-128 + -128*-128 == -32768 overflows int16. |
| // Every other expression a*b + c*d, for any int8 a,b,c,d, fits in int16 |
| // range. That is the basic idea of this kernel. |
| struct MSA_GEMM_Int8Operands_LhsNonzero : KernelBase { |
| typedef KernelFormat< |
| KernelSideFormatInt8<CellFormat<4, 16, CellOrder::WidthMajor>, 1>, |
| KernelSideFormatInt8<CellFormat<4, 16, CellOrder::WidthMajor>, 1> > |
| Format; |
| |
| const char* Name() const override { |
| return "MSA, 4x4, depth 16, accumulating two within signed int16"; |
| } |
| |
| // TODO(benoitjacob): reorder function arguments so dst comes last |
| void Run(std::int32_t* dst_ptr, std::size_t dst_row_stride, |
| std::size_t dst_col_stride, const std::uint8_t* lhs_ptr, |
| const std::uint8_t* rhs_ptr, std::size_t start_depth, |
| std::size_t run_depth) const override { |
| (void)dst_row_stride; |
| #define GEMMLOWP_LABEL_AFTER_LOOP_LAST16 "1" |
| #define GEMMLOWP_LABEL_LOOP "2" |
| #define GEMMLOWP_LABEL_ACCUMULATE_EXISTING_DST_VALUES "3" |
| #define GEMMLOWP_LABEL_STORE "4" |
| asm volatile( |
| GEMMLOWP_MIPS_XADDIU " %[run_depth], -16\n" |
| // Load lhs[] and rhs[], zero out internal accumulators. |
| "ld.b $w16, 0(%[lhs_ptr])\n" |
| "ldi.b $w0, 0\n" |
| "ld.b $w20, 0(%[rhs_ptr])\n" |
| "ldi.b $w1, 0\n" |
| "ld.b $w17, 16(%[lhs_ptr])\n" |
| "ldi.b $w2, 0\n" |
| "ld.b $w21, 16(%[rhs_ptr])\n" |
| "ldi.b $w3, 0\n" |
| "ld.b $w18, 32(%[lhs_ptr])\n" |
| "ldi.b $w4, 0\n" |
| "ld.b $w19, 48(%[lhs_ptr])\n" |
| "ldi.b $w5, 0\n" |
| "ld.b $w22, 32(%[rhs_ptr])\n" |
| "ldi.b $w6, 0\n" |
| "ld.b $w23, 48(%[rhs_ptr])\n" |
| "ldi.b $w7, 0\n" |
| "ldi.b $w8, 0\n" |
| "ldi.b $w9, 0\n" |
| "ldi.b $w10, 0\n" |
| "ldi.b $w11, 0\n" |
| "ldi.b $w12, 0\n" |
| "ldi.b $w13, 0\n" |
| "ldi.b $w14, 0\n" |
| "ldi.b $w15, 0\n" |
| "ldi.h $w31, 1\n" |
| // If the loop depth is only 16, then we can skip the general loop |
| // and go straight to the final part of the code. |
| "beqz %[run_depth], " GEMMLOWP_LABEL_AFTER_LOOP_LAST16 "f\n" |
| |
| GEMMLOWP_LABEL_LOOP ":\n" |
| // Overview of register layout: |
| // |
| // A 4x16 block of Rhs is stored in 8 bit in w16-w19. |
| // A 4x16 block of Lhs is stored in 8 bit in w20-w23. |
| // |
| // A 4x4 block of accumulators is stored in w0-w15 (as 4x32 bit |
| // components which need to be horizontally added at the end). |
| // |
| // Dot products of Lhs and Rhs are 16-bit values, which can't |
| // immediately be accumulated in 32-bit accumulators by that |
| // same instruction that calculates them. |
| // For example, "dotp_s.h $w25, $w16, $w20" produces 8 16-bit |
| // sums in w25 (note, the 16 sums have already been reduced to 8 |
| // by the horizontal addition of the dotp instruction). |
| // They are then sign-extended to 32 bits, horizontally added |
| // (again) to form 4 32-bit sums and then they are finally added |
| // to the 32-bit accumulators, all by "dpadd_s.w $w0, $w25, $w31". |
| // |
| // +-----+-----+-----+-----+ |
| // Rhs | w20 | w21 | w22 | w23 | |
| // +-----+-----+-----+-----+ |
| // |
| // | | | | | |
| // |
| // Lhs | | | | | |
| // |
| // +---+ - - - - +-----+-----+-----+-----+ |
| // |w16| | w0 | w4 | w8 | w12 | |
| // |w17| | w1 | w5 | w9 | w13 | |
| // |w18| | w2 | w6 | w10 | w14 | |
| // |w19| | w3 | w7 | w11 | w15 | |
| // +---+ - - - - +-----+-----+-----+-----+ |
| // |
| // Accumulators |
| |
| // Calculate the results for 16 depths and load |
| // lhs[] and rhs[] for the next iteration. |
| GEMMLOWP_MIPS_XADDIU " %[lhs_ptr], 64\n" |
| GEMMLOWP_MIPS_XADDIU " %[rhs_ptr], 64\n" |
| GEMMLOWP_MIPS_XADDIU " %[run_depth], -16\n" |
| |
| // Dot product: multiply-add pairs of adjacent int8 elements. |
| // Each dot product takes 16*2 int8 values in and produces 8 int16 sums. |
| "dotp_s.h $w25, $w16, $w20\n" |
| "dotp_s.h $w26, $w17, $w20\n" |
| "dotp_s.h $w27, $w16, $w21\n" |
| "dotp_s.h $w28, $w17, $w21\n" |
| "dotp_s.h $w29, $w18, $w20\n" |
| // Horizontal add of pairs of adjacent int16 sums into internal int32 |
| // accumulators. |
| "dpadd_s.w $w0, $w25, $w31\n" |
| "dpadd_s.w $w1, $w26, $w31\n" |
| "dpadd_s.w $w4, $w27, $w31\n" |
| "dpadd_s.w $w5, $w28, $w31\n" |
| "dpadd_s.w $w2, $w29, $w31\n" |
| |
| // Dot product: multiply-add pairs of adjacent int8 elements. |
| // Each dot product takes 16*2 int8 values in and produces 8 int16 sums. |
| "dotp_s.h $w24, $w16, $w22\n" |
| "dotp_s.h $w25, $w19, $w20\n" |
| "dotp_s.h $w26, $w16, $w23\n" |
| "dotp_s.h $w27, $w17, $w22\n" |
| "ld.b $w20, 0(%[rhs_ptr])\n" |
| "dotp_s.h $w28, $w17, $w23\n" |
| "ld.b $w16, 0(%[lhs_ptr])\n" |
| "dotp_s.h $w29, $w18, $w21\n" |
| "ld.b $w17, 16(%[lhs_ptr])\n" |
| // Horizontal add of pairs of adjacent int16 sums into internal int32 |
| // accumulators. |
| "dpadd_s.w $w8, $w24, $w31\n" |
| "dpadd_s.w $w3, $w25, $w31\n" |
| "dpadd_s.w $w12, $w26, $w31\n" |
| "dpadd_s.w $w9, $w27, $w31\n" |
| "dpadd_s.w $w13, $w28, $w31\n" |
| "dpadd_s.w $w6, $w29, $w31\n" |
| |
| // Dot product: multiply-add pairs of adjacent int8 elements. |
| // Each dot product takes 16*2 int8 values in and produces 8 int16 sums. |
| "dotp_s.h $w25, $w19, $w21\n" |
| "dotp_s.h $w26, $w18, $w22\n" |
| "dotp_s.h $w27, $w18, $w23\n" |
| "ld.b $w21, 16(%[rhs_ptr])\n" |
| "dotp_s.h $w28, $w19, $w22\n" |
| "ld.b $w18, 32(%[lhs_ptr])\n" |
| "dotp_s.h $w29, $w19, $w23\n" |
| "ld.b $w22, 32(%[rhs_ptr])\n" |
| // Horizontal add of pairs of adjacent int16 sums into internal int32 |
| // accumulators. |
| "dpadd_s.w $w7, $w25, $w31\n" |
| "ld.b $w19, 48(%[lhs_ptr])\n" |
| "dpadd_s.w $w10, $w26, $w31\n" |
| "ld.b $w23, 48(%[rhs_ptr])\n" |
| "dpadd_s.w $w14, $w27, $w31\n" |
| "dpadd_s.w $w11, $w28, $w31\n" |
| "dpadd_s.w $w15, $w29, $w31\n" |
| |
| "bnez %[run_depth], " GEMMLOWP_LABEL_LOOP "b\n" |
| |
| GEMMLOWP_LABEL_AFTER_LOOP_LAST16 ":\n" |
| // Calculate the results for the last 16 depths. |
| |
| // Dot product: multiply-add pairs of adjacent int8 elements. |
| // Each dot product takes 16*2 int8 values in and produces 8 int16 sums. |
| "dotp_s.h $w25, $w16, $w20\n" |
| "dotp_s.h $w26, $w17, $w20\n" |
| "dotp_s.h $w27, $w16, $w21\n" |
| "dotp_s.h $w28, $w17, $w21\n" |
| "dotp_s.h $w29, $w18, $w20\n" |
| // Horizontal add of pairs of adjacent int16 sums into internal int32 |
| // accumulators. |
| "dpadd_s.w $w0, $w25, $w31\n" |
| "dpadd_s.w $w1, $w26, $w31\n" |
| "dpadd_s.w $w4, $w27, $w31\n" |
| "dpadd_s.w $w5, $w28, $w31\n" |
| "dpadd_s.w $w2, $w29, $w31\n" |
| |
| // Dot product: multiply-add pairs of adjacent int8 elements. |
| // Each dot product takes 16*2 int8 values in and produces 8 int16 sums. |
| "dotp_s.h $w24, $w16, $w22\n" |
| "dotp_s.h $w25, $w19, $w20\n" |
| "dotp_s.h $w26, $w16, $w23\n" |
| "dotp_s.h $w27, $w17, $w22\n" |
| "dotp_s.h $w28, $w17, $w23\n" |
| "dotp_s.h $w29, $w18, $w21\n" |
| // Horizontal add of pairs of adjacent int16 sums into internal int32 |
| // accumulators. |
| "dpadd_s.w $w8, $w24, $w31\n" |
| "dpadd_s.w $w3, $w25, $w31\n" |
| "dpadd_s.w $w12, $w26, $w31\n" |
| "dpadd_s.w $w9, $w27, $w31\n" |
| "dpadd_s.w $w13, $w28, $w31\n" |
| "dpadd_s.w $w6, $w29, $w31\n" |
| |
| // Dot product: multiply-add pairs of adjacent int8 elements. |
| // Each dot product takes 16*2 int8 values in and produces 8 int16 sums. |
| "dotp_s.h $w25, $w19, $w21\n" |
| "dotp_s.h $w26, $w18, $w22\n" |
| "dotp_s.h $w27, $w18, $w23\n" |
| "dotp_s.h $w28, $w19, $w22\n" |
| "dotp_s.h $w29, $w19, $w23\n" |
| // Horizontal add of pairs of adjacent int16 sums into internal int32 |
| // accumulators. |
| "dpadd_s.w $w7, $w25, $w31\n" |
| "dpadd_s.w $w10, $w26, $w31\n" |
| "dpadd_s.w $w14, $w27, $w31\n" |
| "dpadd_s.w $w11, $w28, $w31\n" |
| "dpadd_s.w $w15, $w29, $w31\n" |
| |
| // Horizontal-add internal accumulators. |
| "hadd_s.d $w0, $w0, $w0\n" |
| "hadd_s.d $w1, $w1, $w1\n" |
| "hadd_s.d $w2, $w2, $w2\n" |
| "hadd_s.d $w3, $w3, $w3\n" |
| "hadd_s.d $w4, $w4, $w4\n" |
| "hadd_s.d $w5, $w5, $w5\n" |
| "hadd_s.d $w6, $w6, $w6\n" |
| "hadd_s.d $w7, $w7, $w7\n" |
| "hadd_s.d $w8, $w8, $w8\n" |
| "hadd_s.d $w9, $w9, $w9\n" |
| "hadd_s.d $w10, $w10, $w10\n" |
| "hadd_s.d $w11, $w11, $w11\n" |
| "hadd_s.d $w12, $w12, $w12\n" |
| "hadd_s.d $w13, $w13, $w13\n" |
| "hadd_s.d $w14, $w14, $w14\n" |
| "hadd_s.d $w15, $w15, $w15\n" |
| "pckev.w $w0, $w1, $w0\n" |
| "pckev.w $w2, $w3, $w2\n" |
| "pckev.w $w4, $w5, $w4\n" |
| "pckev.w $w6, $w7, $w6\n" |
| "pckev.w $w8, $w9, $w8\n" |
| "pckev.w $w10, $w11, $w10\n" |
| "pckev.w $w12, $w13, $w12\n" |
| "pckev.w $w14, $w15, $w14\n" |
| "hadd_s.d $w0, $w0, $w0\n" |
| "hadd_s.d $w2, $w2, $w2\n" |
| "hadd_s.d $w4, $w4, $w4\n" |
| "hadd_s.d $w6, $w6, $w6\n" |
| "hadd_s.d $w8, $w8, $w8\n" |
| "hadd_s.d $w10, $w10, $w10\n" |
| "hadd_s.d $w12, $w12, $w12\n" |
| "hadd_s.d $w14, $w14, $w14\n" |
| // 4 more pckev instructions follow in both paths below. |
| |
| // Check if start_depth==0 to decide whether we will load |
| // existing accumulators from memory. |
| "bnez %[start_depth], " GEMMLOWP_LABEL_ACCUMULATE_EXISTING_DST_VALUES "f\n" |
| |
| "pckev.w $w0, $w2, $w0\n" |
| "pckev.w $w1, $w6, $w4\n" |
| "pckev.w $w2, $w10, $w8\n" |
| "pckev.w $w3, $w14, $w12\n" |
| |
| "b " GEMMLOWP_LABEL_STORE "f\n" |
| |
| GEMMLOWP_LABEL_ACCUMULATE_EXISTING_DST_VALUES ":\n" |
| // Load accumulators from memory. |
| "ld.w $w16, 0(%[dst_ptr0])\n" |
| "pckev.w $w0, $w2, $w0\n" |
| "ld.w $w17, 0(%[dst_ptr1])\n" |
| "pckev.w $w1, $w6, $w4\n" |
| "ld.w $w18, 0(%[dst_ptr2])\n" |
| "pckev.w $w2, $w10, $w8\n" |
| "ld.w $w19, 0(%[dst_ptr3])\n" |
| "pckev.w $w3, $w14, $w12\n" |
| |
| // Add them to internal accumulators. |
| "addv.w $w0, $w0, $w16\n" |
| "addv.w $w1, $w1, $w17\n" |
| "addv.w $w2, $w2, $w18\n" |
| "addv.w $w3, $w3, $w19\n" |
| |
| GEMMLOWP_LABEL_STORE ":\n" |
| // Store accumulators. |
| "st.w $w0, 0(%[dst_ptr0])\n" |
| "st.w $w1, 0(%[dst_ptr1])\n" |
| "st.w $w2, 0(%[dst_ptr2])\n" |
| "st.w $w3, 0(%[dst_ptr3])\n" |
| : // outputs |
| [lhs_ptr] "+r"(lhs_ptr), [rhs_ptr] "+r"(rhs_ptr), |
| [run_depth] "+r"(run_depth) |
| : // inputs |
| [dst_ptr0] "r"(dst_ptr), [dst_ptr1] "r"(dst_ptr + dst_col_stride), |
| [dst_ptr2] "r"(dst_ptr + dst_col_stride * 2), |
| [dst_ptr3] "r"(dst_ptr + dst_col_stride * 3), |
| [start_depth] "r"(start_depth) |
| : // clobbers |
| "memory", "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", "$f8", |
| "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15", "$f16", "$f17", |
| "$f18", "$f19", "$f20", "$f21", "$f22", "$f23", "$f24", "$f25", "$f26", |
| "$f27", "$f28", "$f29", "$f30", "$f31"); |
| #undef GEMMLOWP_LABEL_LOOP |
| #undef GEMMLOWP_LABEL_AFTER_LOOP_LAST16 |
| #undef GEMMLOWP_LABEL_ACCUMULATE_EXISTING_DST_VALUES |
| #undef GEMMLOWP_LABEL_STORE |
| } |
| }; |
| |
| #undef GEMMLOWP_MIPS_XADDU |
| #undef GEMMLOWP_MIPS_XADDIU |
| #undef GEMMLOWP_MIPS_XSLL |
| |
| #endif // GEMMLOWP_MSA |
| |
| } // namespace gemmlowp |
| |
| #endif // GEMMLOWP_INTERNAL_KERNEL_MSA_H_ |
