55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
//===-- X86InstrRelaxTables.h - X86 Instruction Relaxation Tables -*- C++ -*-=//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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 instruction relaxation
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// tables.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_X86_X86INSTRRELAXTABLES_H
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#define LLVM_LIB_TARGET_X86_X86INSTRRELAXTABLES_H
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#include <cstdint>
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namespace llvm {
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// This struct is used for both the relaxed and short tables. The KeyOp is used
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// to determine the sorting order.
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struct X86InstrRelaxTableEntry {
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uint16_t KeyOp;
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uint16_t DstOp;
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bool operator<(const X86InstrRelaxTableEntry &RHS) const {
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return KeyOp < RHS.KeyOp;
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}
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bool operator==(const X86InstrRelaxTableEntry &RHS) const {
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return KeyOp == RHS.KeyOp;
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}
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friend bool operator<(const X86InstrRelaxTableEntry &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 relaxed form table entry for a given \p ShortOp.
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const X86InstrRelaxTableEntry *lookupRelaxTable(unsigned ShortOp);
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/// Look up the short form table entry for a given \p RelaxOp.
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const X86InstrRelaxTableEntry *lookupShortTable(unsigned RelaxOp);
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namespace X86 {
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/// Get the short instruction opcode for a given relaxed opcode.
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unsigned getShortOpcodeArith(unsigned RelaxOp);
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/// Get the relaxed instruction opcode for a given short opcode.
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unsigned getRelaxedOpcodeArith(unsigned ShortOp);
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} // namespace X86
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} // namespace llvm
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#endif
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