1 //==- HexagonInstrFormatsV5.td - Hexagon Instruction Formats --*- tablegen -==//
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
7 //===----------------------------------------------------------------------===//
9 // This file describes the Hexagon V5 instruction classes in TableGen format.
11 //===----------------------------------------------------------------------===//
13 // Duplex Instruction Class Declaration
14 //===----------------------------------------------------------------------===//
17 field bits<32> Inst = ?; // Default to an invalid insn.
18 bits<4> IClass = 0; // ICLASS
19 bits<13> ISubHi = 0; // Low sub-insn
20 bits<13> ISubLo = 0; // High sub-insn
22 let Inst{31-29} = IClass{3-1};
23 let Inst{13} = IClass{0};
25 let Inst{28-16} = ISubHi;
26 let Inst{12-0} = ISubLo;
29 class InstDuplex<bits<4> iClass, list<dag> pattern = [],
31 : Instruction, OpcodeDuplex {
32 let Namespace = "Hexagon";
33 IType Type = TypeDUPLEX; // uses slot 0,1
34 let isCodeGenOnly = 1;
35 let hasSideEffects = 0;
36 dag OutOperandList = (outs);
37 dag InOperandList = (ins);
39 let Constraints = cstr;
40 let Itinerary = DUPLEX;
43 // SoftFail is a field the disassembler can use to provide a way for
44 // instructions to not match without killing the whole decode process. It is
45 // mainly used for ARM, but Tablegen expects this field to exist or it fails
46 // to build the decode table.
47 field bits<32> SoftFail = 0;
49 // *** Must match MCTargetDesc/HexagonBaseInfo.h ***
51 let TSFlags{6-0} = Type.Value;
53 // Predicated instructions.
54 bits<1> isPredicated = 0;
55 let TSFlags{7} = isPredicated;
56 bits<1> isPredicatedFalse = 0;
57 let TSFlags{8} = isPredicatedFalse;
58 bits<1> isPredicatedNew = 0;
59 let TSFlags{9} = isPredicatedNew;
61 // New-value insn helper fields.
62 bits<1> isNewValue = 0;
63 let TSFlags{10} = isNewValue; // New-value consumer insn.
64 bits<1> hasNewValue = 0;
65 let TSFlags{11} = hasNewValue; // New-value producer insn.
66 bits<3> opNewValue = 0;
67 let TSFlags{14-12} = opNewValue; // New-value produced operand.
68 bits<1> isNVStorable = 0;
69 let TSFlags{15} = isNVStorable; // Store that can become new-value store.
70 bits<1> isNVStore = 0;
71 let TSFlags{16} = isNVStore; // New-value store insn.
73 // Immediate extender helper fields.
74 bits<1> isExtendable = 0;
75 let TSFlags{17} = isExtendable; // Insn may be extended.
76 bits<1> isExtended = 0;
77 let TSFlags{18} = isExtended; // Insn must be extended.
78 bits<3> opExtendable = 0;
79 let TSFlags{21-19} = opExtendable; // Which operand may be extended.
80 bits<1> isExtentSigned = 0;
81 let TSFlags{22} = isExtentSigned; // Signed or unsigned range.
82 bits<5> opExtentBits = 0;
83 let TSFlags{27-23} = opExtentBits; //Number of bits of range before extending.
84 bits<2> opExtentAlign = 0;
85 let TSFlags{29-28} = opExtentAlign; // Alignment exponent before extending.