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290 lines
11 KiB
290 lines
11 KiB
//===- HexagonMCInstrInfo.cpp - Utility functions on Hexagon MCInsts ------===//
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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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// Utility functions for Hexagon specific MCInst queries
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_HEXAGON_MCTARGETDESC_HEXAGONMCINSTRINFO_H
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#define LLVM_LIB_TARGET_HEXAGON_MCTARGETDESC_HEXAGONMCINSTRINFO_H
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#include "HexagonMCExpr.h"
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#include "llvm/MC/MCInst.h"
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namespace llvm_ks {
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class HexagonMCChecker;
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class MCContext;
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class MCInstrDesc;
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class MCInstrInfo;
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class MCInst;
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class MCOperand;
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class MCSubtargetInfo;
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namespace HexagonII {
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enum class MemAccessSize;
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}
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class DuplexCandidate {
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public:
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unsigned packetIndexI, packetIndexJ, iClass;
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DuplexCandidate(unsigned i, unsigned j, unsigned iClass)
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: packetIndexI(i), packetIndexJ(j), iClass(iClass) {}
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};
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namespace HexagonMCInstrInfo {
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size_t const innerLoopOffset = 0;
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int64_t const innerLoopMask = 1 << innerLoopOffset;
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size_t const outerLoopOffset = 1;
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int64_t const outerLoopMask = 1 << outerLoopOffset;
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// do not reorder memory load/stores by default load/stores are re-ordered
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// and by default loads can be re-ordered
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size_t const memReorderDisabledOffset = 2;
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int64_t const memReorderDisabledMask = 1 << memReorderDisabledOffset;
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// allow re-ordering of memory stores by default stores cannot be re-ordered
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size_t const memStoreReorderEnabledOffset = 3;
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int64_t const memStoreReorderEnabledMask = 1 << memStoreReorderEnabledOffset;
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size_t const bundleInstructionsOffset = 1;
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void addConstant(MCInst &MI, uint64_t Value, MCContext &Context);
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void addConstExtender(MCContext &Context, MCInstrInfo const &MCII, MCInst &MCB,
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MCInst const &MCI);
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// Returns a iterator range of instructions in this bundle
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iterator_range<MCInst::const_iterator> bundleInstructions(MCInst const &MCI);
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// Returns the number of instructions in the bundle
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size_t bundleSize(MCInst const &MCI);
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// Put the packet in to canonical form, compound, duplex, pad, and shuffle
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bool canonicalizePacket(MCInstrInfo const &MCII, MCSubtargetInfo const &STI,
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MCContext &Context, MCInst &MCB,
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HexagonMCChecker *Checker);
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// Clamp off upper 26 bits of extendable operand for emission
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void clampExtended(MCInstrInfo const &MCII, MCContext &Context, MCInst &MCI);
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MCInst createBundle();
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// Return the extender for instruction at Index or nullptr if none
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MCInst const *extenderForIndex(MCInst const &MCB, size_t Index);
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void extendIfNeeded(MCContext &Context, MCInstrInfo const &MCII, MCInst &MCB,
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MCInst const &MCI, bool MustExtend);
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// Create a duplex instruction given the two subinsts
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MCInst *deriveDuplex(MCContext &Context, unsigned iClass, MCInst const &inst0,
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MCInst const &inst1);
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MCInst deriveExtender(MCInstrInfo const &MCII, MCInst const &Inst,
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MCOperand const &MO);
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// Convert this instruction in to a duplex subinst
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MCInst deriveSubInst(MCInst const &Inst);
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// Return the extender for instruction at Index or nullptr if none
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MCInst const *extenderForIndex(MCInst const &MCB, size_t Index);
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// Return memory access size
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HexagonII::MemAccessSize getAccessSize(MCInstrInfo const &MCII,
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MCInst const &MCI);
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// Return number of bits in the constant extended operand.
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unsigned getBitCount(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return constant extended operand number.
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unsigned short getCExtOpNum(MCInstrInfo const &MCII, MCInst const &MCI);
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MCInstrDesc const &getDesc(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return which duplex group this instruction belongs to
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unsigned getDuplexCandidateGroup(MCInst const &MI);
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// Return a list of all possible instruction duplex combinations
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SmallVector<DuplexCandidate, 8> getDuplexPossibilties(MCInstrInfo const &MCII,
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MCInst const &MCB);
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// Return the index of the extendable operand
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unsigned short getExtendableOp(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return a reference to the extendable operand
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MCOperand const &getExtendableOperand(MCInstrInfo const &MCII,
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MCInst const &MCI);
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// Return the implicit alignment of the extendable operand
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unsigned getExtentAlignment(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return the number of logical bits of the extendable operand
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unsigned getExtentBits(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return the max value that a constant extendable operand can have
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// without being extended.
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int getMaxValue(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return the min value that a constant extendable operand can have
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// without being extended.
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int getMinValue(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return instruction name
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char const *getName(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return the operand index for the new value.
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unsigned short getNewValueOp(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return the operand that consumes or produces a new value.
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MCOperand const &getNewValueOperand(MCInstrInfo const &MCII, MCInst const &MCI);
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unsigned short getNewValueOp2(MCInstrInfo const &MCII, MCInst const &MCI);
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MCOperand const &getNewValueOperand2(MCInstrInfo const &MCII,
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MCInst const &MCI);
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int getSubTarget(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return the Hexagon ISA class for the insn.
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unsigned getType(MCInstrInfo const &MCII, MCInst const &MCI);
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/// Return the slots used by the insn.
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unsigned getUnits(MCInstrInfo const &MCII, MCSubtargetInfo const &STI,
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MCInst const &MCI);
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// Does the packet have an extender for the instruction at Index
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bool hasExtenderForIndex(MCInst const &MCB, size_t Index);
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bool hasImmExt(MCInst const &MCI);
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// Return whether the instruction is a legal new-value producer.
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bool hasNewValue(MCInstrInfo const &MCII, MCInst const &MCI);
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bool hasNewValue2(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return the instruction at Index
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MCInst const &instruction(MCInst const &MCB, size_t Index);
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// Returns whether this MCInst is a wellformed bundle
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bool isBundle(MCInst const &MCI);
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// Return whether the insn is an actual insn.
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bool isCanon(MCInstrInfo const &MCII, MCInst const &MCI);
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bool isCompound(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return the duplex iclass given the two duplex classes
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unsigned iClassOfDuplexPair(unsigned Ga, unsigned Gb);
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int64_t minConstant(MCInst const &MCI, size_t Index);
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template <unsigned N, unsigned S>
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bool inRange(MCInst const &MCI, size_t Index) {
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return isShiftedUInt<N, S>(minConstant(MCI, Index));
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}
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template <unsigned N, unsigned S>
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bool inSRange(MCInst const &MCI, size_t Index) {
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return isShiftedInt<N, S>(minConstant(MCI, Index));
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}
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template <unsigned N> bool inRange(MCInst const &MCI, size_t Index) {
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return isUInt<N>(minConstant(MCI, Index));
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}
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// Return whether the instruction needs to be constant extended.
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bool isConstExtended(MCInstrInfo const &MCII, MCInst const &MCI);
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// Is this double register suitable for use in a duplex subinst
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bool isDblRegForSubInst(unsigned Reg);
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// Is this a duplex instruction
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bool isDuplex(MCInstrInfo const &MCII, MCInst const &MCI);
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// Can these instructions be duplexed
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bool isDuplexPair(MCInst const &MIa, MCInst const &MIb);
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// Can these duplex classes be combine in to a duplex instruction
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bool isDuplexPairMatch(unsigned Ga, unsigned Gb);
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// Return true if the insn may be extended based on the operand value.
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bool isExtendable(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return whether the instruction must be always extended.
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bool isExtended(MCInstrInfo const &MCII, MCInst const &MCI);
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/// Return whether it is a floating-point insn.
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bool isFloat(MCInstrInfo const &MCII, MCInst const &MCI);
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// Returns whether this instruction is an immediate extender
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bool isImmext(MCInst const &MCI);
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// Returns whether this bundle is an endloop0
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bool isInnerLoop(MCInst const &MCI);
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// Is this an integer register
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bool isIntReg(unsigned Reg);
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// Is this register suitable for use in a duplex subinst
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bool isIntRegForSubInst(unsigned Reg);
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bool isMemReorderDisabled(MCInst const &MCI);
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bool isMemStoreReorderEnabled(MCInst const &MCI);
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// Return whether the insn is a new-value consumer.
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bool isNewValue(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return true if the operand can be constant extended.
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bool isOperandExtended(MCInstrInfo const &MCII, MCInst const &MCI,
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unsigned short OperandNum);
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// Can these two instructions be duplexed
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bool isOrderedDuplexPair(MCInstrInfo const &MCII, MCInst const &MIa,
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bool ExtendedA, MCInst const &MIb, bool ExtendedB,
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bool bisReversable);
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// Returns whether this bundle is an endloop1
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bool isOuterLoop(MCInst const &MCI);
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// Return whether this instruction is predicated
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bool isPredicated(MCInstrInfo const &MCII, MCInst const &MCI);
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bool isPredicateLate(MCInstrInfo const &MCII, MCInst const &MCI);
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bool isPredicatedNew(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return whether the predicate sense is true
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bool isPredicatedTrue(MCInstrInfo const &MCII, MCInst const &MCI);
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// Is this a predicate register
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bool isPredReg(unsigned Reg);
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// Return whether the insn is a prefix.
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bool isPrefix(MCInstrInfo const &MCII, MCInst const &MCI);
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// Return whether the insn is solo, i.e., cannot be in a packet.
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bool isSolo(MCInstrInfo const &MCII, MCInst const &MCI);
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/// Return whether the insn can be packaged only with A and X-type insns.
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bool isSoloAX(MCInstrInfo const &MCII, MCInst const &MCI);
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/// Return whether the insn can be packaged only with an A-type insn in slot #1.
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bool isSoloAin1(MCInstrInfo const &MCII, MCInst const &MCI);
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bool isVector(MCInstrInfo const &MCII, MCInst const &MCI);
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// Pad the bundle with nops to satisfy endloop requirements
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void padEndloop(MCContext &Context, MCInst &MCI);
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bool prefersSlot3(MCInstrInfo const &MCII, MCInst const &MCI);
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// Replace the instructions inside MCB, represented by Candidate
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void replaceDuplex(MCContext &Context, MCInst &MCB, DuplexCandidate Candidate);
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// Marks a bundle as endloop0
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void setInnerLoop(MCInst &MCI);
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void setMemReorderDisabled(MCInst &MCI);
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void setMemStoreReorderEnabled(MCInst &MCI);
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// Marks a bundle as endloop1
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void setOuterLoop(MCInst &MCI);
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// Would duplexing this instruction create a requirement to extend
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bool subInstWouldBeExtended(MCInst const &potentialDuplex);
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// Attempt to find and replace compound pairs
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void tryCompound(MCInstrInfo const &MCII, MCContext &Context, MCInst &MCI);
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}
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}
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#endif // LLVM_LIB_TARGET_HEXAGON_MCTARGETDESC_HEXAGONMCINSTRINFO_H
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