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      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       (i64
     16        (A2_combinew
     17         (M2_maci
     18          (M2_maci
     19           (i32
     20            (EXTRACT_SUBREG
     21             (i64
     22              (M2_dpmpyuu_s0 (i32 (EXTRACT_SUBREG (i64 DoubleRegs:$src1),
     23                                           subreg_loreg)),
     24                      (i32 (EXTRACT_SUBREG (i64 DoubleRegs:$src2),
     25                                           subreg_loreg)))),
     26             subreg_hireg)),
     27           (i32 (EXTRACT_SUBREG (i64 DoubleRegs:$src1), subreg_loreg)),
     28           (i32 (EXTRACT_SUBREG (i64 DoubleRegs:$src2), subreg_hireg))),
     29          (i32 (EXTRACT_SUBREG (i64 DoubleRegs:$src2), subreg_loreg)),
     30          (i32 (EXTRACT_SUBREG (i64 DoubleRegs:$src1), subreg_hireg))),
     31         (i32
     32          (EXTRACT_SUBREG
     33           (i64
     34            (M2_dpmpyuu_s0 
     35              (i32 (EXTRACT_SUBREG (i64 DoubleRegs:$src1), subreg_loreg)),
     36                    (i32 (EXTRACT_SUBREG (i64 DoubleRegs:$src2),
     37                                         subreg_loreg)))), subreg_loreg))))>;
     38 
     39 
     40 
     41