lib/Target/Hexagon/HexagonIntrinsicsDerived.td

   1 //===-- HexagonIntrinsicsDerived.td - Derived intrinsics ---*- tablegen -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // Multiply 64-bit and use lower result
  11 //
  12 // Optimized with intrinisics accumulates
  13 //
  14 def : Pat <(mul DoubleRegs:$src1, DoubleRegs:$src2),
  15       (COMBINE_rr
  16                   (Hexagon_M2_maci
  17                            (Hexagon_M2_maci (EXTRACT_SUBREG  (MPYU64 (EXTRACT_SUBREG DoubleRegs:$src1, subreg_loreg),
  18                                                            (EXTRACT_SUBREG DoubleRegs:$src2, subreg_loreg)),
  19                                        subreg_hireg),
  20                                        (EXTRACT_SUBREG DoubleRegs:$src1, subreg_loreg),
  21                                        (EXTRACT_SUBREG DoubleRegs:$src2, subreg_hireg)),
  22                             (EXTRACT_SUBREG DoubleRegs:$src2, subreg_loreg),
  23                             (EXTRACT_SUBREG DoubleRegs:$src1, subreg_hireg)),
  24                     (EXTRACT_SUBREG  (MPYU64 (EXTRACT_SUBREG DoubleRegs:$src1, subreg_loreg),
  25                                       (EXTRACT_SUBREG DoubleRegs:$src2, subreg_loreg)),
  26                      subreg_loreg))>;
  27
  28
  29