llvm/lib/Target/X86/X86InstrFoldTables.h

   1 //===-- X86InstrFoldTables.h - X86 Instruction Folding Tables ---*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file contains the interface to query the X86 memory folding tables.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_LIB_TARGET_X86_X86INSTRFOLDTABLES_H
  14 #define LLVM_LIB_TARGET_X86_X86INSTRFOLDTABLES_H
  15
  16 #include <cstdint>
  17 #include "llvm/Support/X86FoldTablesUtils.h"
  18
  19 namespace llvm {
  20
  21 // This struct is used for both the folding and unfold tables. They KeyOp
  22 // is used to determine the sorting order.
  23 struct X86MemoryFoldTableEntry {
  24   unsigned KeyOp;
  25   unsigned DstOp;
  26   uint16_t Flags;
  27
  28   bool operator<(const X86MemoryFoldTableEntry &RHS) const {
  29     return KeyOp < RHS.KeyOp;
  30   }
  31   bool operator==(const X86MemoryFoldTableEntry &RHS) const {
  32     return KeyOp == RHS.KeyOp;
  33   }
  34   friend bool operator<(const X86MemoryFoldTableEntry &TE, unsigned Opcode) {
  35     return TE.KeyOp < Opcode;
  36   }
  37 };
  38
  39 // Look up the memory folding table entry for folding a load and a store into
  40 // operand 0.
  41 const X86MemoryFoldTableEntry *lookupTwoAddrFoldTable(unsigned RegOp);
  42
  43 // Look up the memory folding table entry for folding a load or store with
  44 // operand OpNum.
  45 const X86MemoryFoldTableEntry *lookupFoldTable(unsigned RegOp, unsigned OpNum);
  46
  47 // Look up the memory unfolding table entry for this instruction.
  48 const X86MemoryFoldTableEntry *lookupUnfoldTable(unsigned MemOp);
  49
  50 // Look up the broadcast memory folding table entry for this instruction from
  51 // the regular memory instruction.
  52 const X86MemoryFoldTableEntry *lookupBroadcastFoldTable(unsigned MemOp,
  53                                                         unsigned BroadcastBits);
  54
  55 } // namespace llvm
  56
  57 #endif