1 //===- HexagonMCInstrInfo.cpp - Hexagon sub-class of MCInst ---------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // Utility functions for Hexagon specific MCInst queries
11 //
12 //===----------------------------------------------------------------------===//
13
14 #ifndef LLVM_LIB_TARGET_HEXAGON_MCTARGETDESC_HEXAGONMCINSTRINFO_H
15 #define LLVM_LIB_TARGET_HEXAGON_MCTARGETDESC_HEXAGONMCINSTRINFO_H
16
17 #include "llvm/MC/MCInstrInfo.h"
18
19 #include <bitset>
20
21 namespace llvm {
22 class MCInstrDesc;
23 class MCInstrInfo;
24 class MCInst;
25 class MCOperand;
26 namespace HexagonMCInstrInfo {
27 void AppendImplicitOperands(MCInst &MCI);
28
29 // Return number of bits in the constant extended operand.
30 unsigned getBitCount(MCInstrInfo const &MCII, MCInst const &MCI);
31
32 // Return constant extended operand number.
33 unsigned short getCExtOpNum(MCInstrInfo const &MCII, MCInst const &MCI);
34
35 MCInstrDesc const &getDesc(MCInstrInfo const &MCII, MCInst const &MCI);
36
37 std::bitset<16> GetImplicitBits(MCInst const &MCI);
38
39 // Return the max value that a constant extendable operand can have
40 // without being extended.
41 int getMaxValue(MCInstrInfo const &MCII, MCInst const &MCI);
42
43 // Return the min value that a constant extendable operand can have
44 // without being extended.
45 int getMinValue(MCInstrInfo const &MCII, MCInst const &MCI);
46
47 // Return the operand that consumes or produces a new value.
48 MCOperand const &getNewValue(MCInstrInfo const &MCII, MCInst const &MCI);
49
50 // Return the Hexagon ISA class for the insn.
51 unsigned getType(MCInstrInfo const &MCII, MCInst const &MCI);
52
53 // Return whether the instruction is a legal new-value producer.
54 bool hasNewValue(MCInstrInfo const &MCII, MCInst const &MCI);
55
56 // Return whether the insn is an actual insn.
57 bool isCanon(MCInstrInfo const &MCII, MCInst const &MCI);
58
59 // Return whether the instruction needs to be constant extended.
60 bool isConstExtended(MCInstrInfo const &MCII, MCInst const &MCI);
61
62 // Return true if the insn may be extended based on the operand value.
63 bool isExtendable(MCInstrInfo const &MCII, MCInst const &MCI);
64
65 // Return whether the instruction must be always extended.
66 bool isExtended(MCInstrInfo const &MCII, MCInst const &MCI);
67
68 // Return whether the insn is a new-value consumer.
69 bool isNewValue(MCInstrInfo const &MCII, MCInst const &MCI);
70
71 // Return true if the operand can be constant extended.
72 bool isOperandExtended(MCInstrInfo const &MCII, MCInst const &MCI,
73 unsigned short OperandNum);
74
75 bool isPacketBegin(MCInst const &MCI);
76
77 bool isPacketEnd(MCInst const &MCI);
78
79 // Return whether the insn is a prefix.
80 bool isPrefix(MCInstrInfo const &MCII, MCInst const &MCI);
81
82 // Return whether the insn is solo, i.e., cannot be in a packet.
83 bool isSolo(MCInstrInfo const &MCII, MCInst const &MCI);
84
85 static const size_t packetBeginIndex = 0;
86 static const size_t packetEndIndex = 1;
87
88 void resetPacket(MCInst &MCI);
89
SanityCheckImplicitOperands(MCInst const & MCI)90 inline void SanityCheckImplicitOperands(MCInst const &MCI) {
91 assert(MCI.getNumOperands() >= 2 && "At least the two implicit operands");
92 assert(MCI.getOperand(MCI.getNumOperands() - 1).isInst() &&
93 "Implicit bits and flags");
94 assert(MCI.getOperand(MCI.getNumOperands() - 2).isImm() &&
95 "Parent pointer");
96 }
97
98 void SetImplicitBits(MCInst &MCI, std::bitset<16> Bits);
99
100 void setPacketBegin(MCInst &MCI, bool Y);
101
102 void setPacketEnd(MCInst &MCI, bool Y);
103 }
104 }
105
106 #endif // LLVM_LIB_TARGET_HEXAGON_MCTARGETDESC_HEXAGONMCINSTRINFO_H
107