forked from OSchip/llvm-project
86 lines
2.6 KiB
C++
86 lines
2.6 KiB
C++
//===-- X86InstrFoldTables.h - X86 Instruction Folding Tables ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the interface to query the X86 memory folding tables.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_X86_X86INSTRFOLDTABLES_H
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#define LLVM_LIB_TARGET_X86_X86INSTRFOLDTABLES_H
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#include "llvm/Support/DataTypes.h"
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namespace llvm {
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enum {
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// Select which memory operand is being unfolded.
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// (stored in bits 0 - 3)
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TB_INDEX_0 = 0,
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TB_INDEX_1 = 1,
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TB_INDEX_2 = 2,
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TB_INDEX_3 = 3,
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TB_INDEX_4 = 4,
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TB_INDEX_MASK = 0xf,
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// Do not insert the reverse map (MemOp -> RegOp) into the table.
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// This may be needed because there is a many -> one mapping.
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TB_NO_REVERSE = 1 << 4,
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// Do not insert the forward map (RegOp -> MemOp) into the table.
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// This is needed for Native Client, which prohibits branch
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// instructions from using a memory operand.
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TB_NO_FORWARD = 1 << 5,
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TB_FOLDED_LOAD = 1 << 6,
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TB_FOLDED_STORE = 1 << 7,
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// Minimum alignment required for load/store.
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// Used for RegOp->MemOp conversion.
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// (stored in bits 8 - 15)
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TB_ALIGN_SHIFT = 8,
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TB_ALIGN_NONE = 0 << TB_ALIGN_SHIFT,
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TB_ALIGN_16 = 16 << TB_ALIGN_SHIFT,
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TB_ALIGN_32 = 32 << TB_ALIGN_SHIFT,
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TB_ALIGN_64 = 64 << TB_ALIGN_SHIFT,
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TB_ALIGN_MASK = 0xff << TB_ALIGN_SHIFT
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};
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// This struct is used for both the folding and unfold tables. They KeyOp
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// is used to determine the sorting order.
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struct X86MemoryFoldTableEntry {
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uint16_t KeyOp;
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uint16_t DstOp;
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uint16_t Flags;
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bool operator<(const X86MemoryFoldTableEntry &RHS) const {
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return KeyOp < RHS.KeyOp;
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}
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bool operator==(const X86MemoryFoldTableEntry &RHS) const {
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return KeyOp == RHS.KeyOp;
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}
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friend bool operator<(const X86MemoryFoldTableEntry &TE, unsigned Opcode) {
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return TE.KeyOp < Opcode;
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}
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};
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// Look up the memory folding table entry for folding a load and a store into
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// operand 0.
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const X86MemoryFoldTableEntry *lookupTwoAddrFoldTable(unsigned RegOp);
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// Look up the memory folding table entry for folding a load or store with
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// operand OpNum.
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const X86MemoryFoldTableEntry *lookupFoldTable(unsigned RegOp, unsigned OpNum);
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// Look up the memory unfolding table entry for this instruction.
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const X86MemoryFoldTableEntry *lookupUnfoldTable(unsigned MemOp);
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} // namespace llvm
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#endif
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