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336 lines
12 KiB
TableGen
336 lines
12 KiB
TableGen
//==- HexagonInstrFormats.td - Hexagon Instruction Formats --*- tablegen -*-==//
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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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// Addressing modes for load/store instructions
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class AddrModeType<bits<3> value> {
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bits<3> Value = value;
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}
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def NoAddrMode : AddrModeType<0>; // No addressing mode
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def Absolute : AddrModeType<1>; // Absolute addressing mode
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def AbsoluteSet : AddrModeType<2>; // Absolute set addressing mode
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def BaseImmOffset : AddrModeType<3>; // Indirect with offset
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def BaseLongOffset : AddrModeType<4>; // Indirect with long offset
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def BaseRegOffset : AddrModeType<5>; // Indirect with register offset
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def PostInc : AddrModeType<6>; // Post increment addressing mode
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class MemAccessSize<bits<4> value> {
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bits<4> Value = value;
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}
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// These numbers must match the MemAccessSize enumeration values in
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// HexagonBaseInfo.h.
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def NoMemAccess : MemAccessSize<0>;
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def ByteAccess : MemAccessSize<1>;
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def HalfWordAccess : MemAccessSize<2>;
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def WordAccess : MemAccessSize<3>;
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def DoubleWordAccess : MemAccessSize<4>;
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def HVXVectorAccess : MemAccessSize<5>;
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//===----------------------------------------------------------------------===//
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// Instruction Class Declaration +
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//===----------------------------------------------------------------------===//
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// "Parse" bits are explicitly NOT defined in the opcode space to prevent
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// TableGen from using them for generation of the decoder tables.
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class OpcodeHexagon {
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field bits<32> Inst = ?; // Default to an invalid insn.
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bits<4> IClass = 0; // ICLASS
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bits<1> zero = 0;
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let Inst{31-28} = IClass;
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}
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class InstHexagon<dag outs, dag ins, string asmstr, list<dag> pattern,
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string cstr, InstrItinClass itin, IType type>
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: Instruction {
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let Namespace = "Hexagon";
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dag OutOperandList = outs;
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dag InOperandList = ins;
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let AsmString = asmstr;
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let Pattern = pattern;
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let Constraints = cstr;
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let Itinerary = itin;
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let Size = 4;
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// SoftFail is a field the disassembler can use to provide a way for
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// instructions to not match without killing the whole decode process. It is
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// mainly used for ARM, but Tablegen expects this field to exist or it fails
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// to build the decode table.
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field bits<32> SoftFail = 0;
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// *** Must match MCTargetDesc/HexagonBaseInfo.h ***
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// Instruction type according to the ISA.
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IType Type = type;
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let TSFlags{6-0} = Type.Value;
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// Solo instructions, i.e., those that cannot be in a packet with others.
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bits<1> isSolo = 0;
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let TSFlags{7} = isSolo;
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// Packed only with A or X-type instructions.
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bits<1> isSoloAX = 0;
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let TSFlags{8} = isSoloAX;
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// Restricts slot 1 to ALU-only instructions.
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bits<1> isRestrictSlot1AOK = 0;
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let TSFlags{9} = isRestrictSlot1AOK;
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// Predicated instructions.
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bits<1> isPredicated = 0;
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let TSFlags{10} = isPredicated;
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bits<1> isPredicatedFalse = 0;
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let TSFlags{11} = isPredicatedFalse;
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bits<1> isPredicatedNew = 0;
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let TSFlags{12} = isPredicatedNew;
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bits<1> isPredicateLate = 0;
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let TSFlags{13} = isPredicateLate; // Late predicate producer insn.
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// New-value insn helper fields.
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bits<1> isNewValue = 0;
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let TSFlags{14} = isNewValue; // New-value consumer insn.
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bits<1> hasNewValue = 0;
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let TSFlags{15} = hasNewValue; // New-value producer insn.
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bits<3> opNewValue = 0;
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let TSFlags{18-16} = opNewValue; // New-value produced operand.
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bits<1> isNVStorable = 0;
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let TSFlags{19} = isNVStorable; // Store that can become new-value store.
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bits<1> isNVStore = 0;
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let TSFlags{20} = isNVStore; // New-value store insn.
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bits<1> isCVLoadable = 0;
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let TSFlags{21} = isCVLoadable; // Load that can become cur-value load.
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bits<1> isCVLoad = 0;
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let TSFlags{22} = isCVLoad; // Cur-value load insn.
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// Immediate extender helper fields.
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bits<1> isExtendable = 0;
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let TSFlags{23} = isExtendable; // Insn may be extended.
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bits<1> isExtended = 0;
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let TSFlags{24} = isExtended; // Insn must be extended.
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bits<3> opExtendable = 0;
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let TSFlags{27-25} = opExtendable; // Which operand may be extended.
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bits<1> isExtentSigned = 0;
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let TSFlags{28} = isExtentSigned; // Signed or unsigned range.
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bits<5> opExtentBits = 0;
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let TSFlags{33-29} = opExtentBits; //Number of bits of range before extending.
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bits<2> opExtentAlign = 0;
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let TSFlags{35-34} = opExtentAlign; // Alignment exponent before extending.
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bit cofMax1 = 0;
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let TSFlags{36} = cofMax1;
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bit cofRelax1 = 0;
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let TSFlags{37} = cofRelax1;
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bit cofRelax2 = 0;
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let TSFlags{38} = cofRelax2;
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bit isRestrictNoSlot1Store = 0;
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let TSFlags{39} = isRestrictNoSlot1Store;
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// Addressing mode for load/store instructions.
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AddrModeType addrMode = NoAddrMode;
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let TSFlags{44-42} = addrMode.Value;
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// Memory access size for mem access instructions (load/store)
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MemAccessSize accessSize = NoMemAccess;
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let TSFlags{48-45} = accessSize.Value;
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bits<1> isTaken = 0;
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let TSFlags {49} = isTaken; // Branch prediction.
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bits<1> isFP = 0;
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let TSFlags {50} = isFP; // Floating-point.
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bits<1> isSomeOK = 0;
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let TSFlags {51} = isSomeOK; // Relax some grouping constraints.
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bits<1> hasNewValue2 = 0;
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let TSFlags{52} = hasNewValue2; // Second New-value producer insn.
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bits<3> opNewValue2 = 0;
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let TSFlags{55-53} = opNewValue2; // Second New-value produced operand.
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bits<1> isAccumulator = 0;
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let TSFlags{56} = isAccumulator;
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bits<1> prefersSlot3 = 0;
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let TSFlags{57} = prefersSlot3; // Complex XU
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bits<1> hasTmpDst = 0;
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let TSFlags{60} = hasTmpDst; // v65 : 'fake" register VTMP is set
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bit CVINew = 0;
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let TSFlags{62} = CVINew;
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bit isCVI = 0;
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let TSFlags{63} = isCVI;
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// Fields used for relation models.
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bit isNonTemporal = 0;
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string isNT = ""; // set to "true" for non-temporal vector stores.
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string BaseOpcode = "";
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string CextOpcode = "";
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string PredSense = "";
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string PNewValue = "";
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string NValueST = ""; // Set to "true" for new-value stores.
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string InputType = ""; // Input is "imm" or "reg" type.
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string isFloat = "false"; // Set to "true" for the floating-point load/store.
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string isBrTaken = !if(isTaken, "true", "false"); // Set to "true"/"false" for jump instructions
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let PredSense = !if(isPredicated, !if(isPredicatedFalse, "false", "true"),
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"");
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let PNewValue = !if(isPredicatedNew, "new", "");
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let NValueST = !if(isNVStore, "true", "false");
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let isNT = !if(isNonTemporal, "true", "false");
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let hasSideEffects = 0;
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// *** Must match MCTargetDesc/HexagonBaseInfo.h ***
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}
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class HInst<dag outs, dag ins, string asmstr, InstrItinClass itin, IType type> :
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InstHexagon<outs, ins, asmstr, [], "", itin, type>;
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//===----------------------------------------------------------------------===//
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// Instruction Classes Definitions +
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//===----------------------------------------------------------------------===//
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let mayLoad = 1 in
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class LDInst<dag outs, dag ins, string asmstr, list<dag> pattern = [],
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string cstr = "", InstrItinClass itin = LD_tc_ld_SLOT01>
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: InstHexagon<outs, ins, asmstr, pattern, cstr, itin, TypeLD>, OpcodeHexagon;
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class CONSTLDInst<dag outs, dag ins, string asmstr, list<dag> pattern = [],
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string cstr = "", InstrItinClass itin = LD_tc_ld_SLOT01>
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: InstHexagon<outs, ins, asmstr, pattern, cstr, itin, TypeLD>, OpcodeHexagon;
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let mayStore = 1 in
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class STInst<dag outs, dag ins, string asmstr, list<dag> pattern = [],
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string cstr = "", InstrItinClass itin = ST_tc_st_SLOT01>
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: InstHexagon<outs, ins, asmstr, pattern, cstr, itin, TypeST>, OpcodeHexagon;
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let isCodeGenOnly = 1, isPseudo = 1 in
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class Endloop<dag outs, dag ins, string asmstr, list<dag> pattern = [],
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string cstr = "", InstrItinClass itin = tc_ENDLOOP>
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: InstHexagon<outs, ins, asmstr, pattern, cstr, itin, TypeENDLOOP>,
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OpcodeHexagon;
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let isCodeGenOnly = 1, isPseudo = 1 in
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class Pseudo<dag outs, dag ins, string asmstr, list<dag> pattern = [],
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string cstr = "">
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: InstHexagon<outs, ins, asmstr, pattern, cstr, PSEUDO, TypePSEUDO>,
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OpcodeHexagon;
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let isCodeGenOnly = 1, isPseudo = 1 in
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class PseudoM<dag outs, dag ins, string asmstr, list<dag> pattern = [],
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string cstr="">
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: InstHexagon<outs, ins, asmstr, pattern, cstr, PSEUDOM, TypePSEUDO>,
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OpcodeHexagon;
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//===----------------------------------------------------------------------===//
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// Special Instructions -
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//===----------------------------------------------------------------------===//
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// The 'invalid_decode' instruction is used by the disassembler to
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// show an instruction that didn't decode correctly. This feature
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// is only leveraged in a special disassembler mode that's activated
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// by a command line flag.
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def tc_invalid : InstrItinClass;
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class Enc_invalid : OpcodeHexagon {
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}
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def invalid_decode : HInst<
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(outs ),
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(ins ),
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"<invalid>",
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tc_invalid, TypeALU32_2op>, Enc_invalid {
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let Inst{13-0} = 0b00000000000000;
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let Inst{31-16} = 0b0000000000000000;
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let isCodeGenOnly = 1;
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}
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//===----------------------------------------------------------------------===//
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// Duplex Instruction Class Declaration
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//===----------------------------------------------------------------------===//
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class OpcodeDuplex {
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field bits<32> Inst = ?; // Default to an invalid insn.
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bits<4> IClass = 0; // ICLASS
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bits<13> ISubHi = 0; // Low sub-insn
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bits<13> ISubLo = 0; // High sub-insn
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let Inst{31-29} = IClass{3-1};
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let Inst{13} = IClass{0};
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let Inst{15-14} = 0;
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let Inst{28-16} = ISubHi;
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let Inst{12-0} = ISubLo;
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}
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class InstDuplex<bits<4> iClass, list<dag> pattern = [],
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string cstr = "">
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: Instruction, OpcodeDuplex {
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let Namespace = "Hexagon";
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IType Type = TypeDUPLEX; // uses slot 0,1
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let isCodeGenOnly = 1;
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let hasSideEffects = 0;
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dag OutOperandList = (outs);
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dag InOperandList = (ins);
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let IClass = iClass;
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let Constraints = cstr;
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let Itinerary = DUPLEX;
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let Size = 4;
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// SoftFail is a field the disassembler can use to provide a way for
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// instructions to not match without killing the whole decode process. It is
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// mainly used for ARM, but Tablegen expects this field to exist or it fails
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// to build the decode table.
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field bits<32> SoftFail = 0;
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// *** Must match MCTargetDesc/HexagonBaseInfo.h ***
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let TSFlags{6-0} = Type.Value;
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// Predicated instructions.
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bits<1> isPredicated = 0;
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let TSFlags{7} = isPredicated;
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bits<1> isPredicatedFalse = 0;
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let TSFlags{8} = isPredicatedFalse;
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bits<1> isPredicatedNew = 0;
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let TSFlags{9} = isPredicatedNew;
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// New-value insn helper fields.
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bits<1> isNewValue = 0;
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let TSFlags{10} = isNewValue; // New-value consumer insn.
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bits<1> hasNewValue = 0;
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let TSFlags{11} = hasNewValue; // New-value producer insn.
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bits<3> opNewValue = 0;
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let TSFlags{14-12} = opNewValue; // New-value produced operand.
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bits<1> isNVStorable = 0;
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let TSFlags{15} = isNVStorable; // Store that can become new-value store.
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bits<1> isNVStore = 0;
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let TSFlags{16} = isNVStore; // New-value store insn.
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// Immediate extender helper fields.
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bits<1> isExtendable = 0;
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let TSFlags{17} = isExtendable; // Insn may be extended.
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bits<1> isExtended = 0;
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let TSFlags{18} = isExtended; // Insn must be extended.
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bits<3> opExtendable = 0;
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let TSFlags{21-19} = opExtendable; // Which operand may be extended.
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bits<1> isExtentSigned = 0;
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let TSFlags{22} = isExtentSigned; // Signed or unsigned range.
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bits<5> opExtentBits = 0;
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let TSFlags{27-23} = opExtentBits; //Number of bits of range before extending.
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bits<2> opExtentAlign = 0;
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let TSFlags{29-28} = opExtentAlign; // Alignment exponent before extending.
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}
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//===----------------------------------------------------------------------===//
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// Instruction Classes Definitions -
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//===----------------------------------------------------------------------===//
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include "HexagonInstrFormatsV60.td"
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include "HexagonInstrFormatsV65.td"
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