LLVM  9.0.0svn
LanaiAluCode.h
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1 //===-- LanaiAluCode.h - ALU operator encoding ----------------------------===//
2 //
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
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // The encoding for ALU operators used in RM and RRM operands
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_LANAI_LANAIALUCODE_H
14 #define LLVM_LIB_TARGET_LANAI_LANAIALUCODE_H
15 
16 #include "llvm/ADT/StringSwitch.h"
19 
20 namespace llvm {
21 namespace LPAC {
22 enum AluCode {
23  ADD = 0x00,
24  ADDC = 0x01,
25  SUB = 0x02,
26  SUBB = 0x03,
27  AND = 0x04,
28  OR = 0x05,
29  XOR = 0x06,
30  SPECIAL = 0x07,
31 
32  // Shift instructions are treated as SPECIAL when encoding the machine
33  // instruction, but kept distinct until lowering. The constant values are
34  // chosen to ease lowering.
35  SHL = 0x17,
36  SRL = 0x27,
37  SRA = 0x37,
38 
39  // Indicates an unknown/unsupported operator
40  UNKNOWN = 0xFF,
41 };
42 
43 // Bits indicating post- and pre-operators should be tested and set using Is*
44 // and Make* utility functions
45 const int Lanai_PRE_OP = 0x40;
46 const int Lanai_POST_OP = 0x80;
47 
48 inline static unsigned encodeLanaiAluCode(unsigned AluOp) {
49  unsigned const OP_ENCODING_MASK = 0x07;
50  return AluOp & OP_ENCODING_MASK;
51 }
52 
53 inline static unsigned getAluOp(unsigned AluOp) {
54  unsigned const ALU_MASK = 0x3F;
55  return AluOp & ALU_MASK;
56 }
57 
58 inline static bool isPreOp(unsigned AluOp) { return AluOp & Lanai_PRE_OP; }
59 
60 inline static bool isPostOp(unsigned AluOp) { return AluOp & Lanai_POST_OP; }
61 
62 inline static unsigned makePreOp(unsigned AluOp) {
63  assert(!isPostOp(AluOp) && "Operator can't be a post- and pre-op");
64  return AluOp | Lanai_PRE_OP;
65 }
66 
67 inline static unsigned makePostOp(unsigned AluOp) {
68  assert(!isPreOp(AluOp) && "Operator can't be a post- and pre-op");
69  return AluOp | Lanai_POST_OP;
70 }
71 
72 inline static bool modifiesOp(unsigned AluOp) {
73  return isPreOp(AluOp) | isPostOp(AluOp);
74 }
75 
76 inline static const char *lanaiAluCodeToString(unsigned AluOp) {
77  switch (getAluOp(AluOp)) {
78  case ADD:
79  return "add";
80  case ADDC:
81  return "addc";
82  case SUB:
83  return "sub";
84  case SUBB:
85  return "subb";
86  case AND:
87  return "and";
88  case OR:
89  return "or";
90  case XOR:
91  return "xor";
92  case SHL:
93  return "sh";
94  case SRL:
95  return "sh";
96  case SRA:
97  return "sha";
98  default:
99  llvm_unreachable("Invalid ALU code.");
100  }
101 }
102 
104  return StringSwitch<AluCode>(S)
105  .Case("add", ADD)
106  .Case("addc", ADDC)
107  .Case("sub", SUB)
108  .Case("subb", SUBB)
109  .Case("and", AND)
110  .Case("or", OR)
111  .Case("xor", XOR)
112  .Case("sh", SHL)
113  .Case("srl", SRL)
114  .Case("sha", SRA)
115  .Default(UNKNOWN);
116 }
117 
118 inline static AluCode isdToLanaiAluCode(ISD::NodeType Node_type) {
119  switch (Node_type) {
120  case ISD::ADD:
121  return AluCode::ADD;
122  case ISD::ADDE:
123  return AluCode::ADDC;
124  case ISD::SUB:
125  return AluCode::SUB;
126  case ISD::SUBE:
127  return AluCode::SUBB;
128  case ISD::AND:
129  return AluCode::AND;
130  case ISD::OR:
131  return AluCode::OR;
132  case ISD::XOR:
133  return AluCode::XOR;
134  case ISD::SHL:
135  return AluCode::SHL;
136  case ISD::SRL:
137  return AluCode::SRL;
138  case ISD::SRA:
139  return AluCode::SRA;
140  default:
141  return AluCode::UNKNOWN;
142  }
143 }
144 } // namespace LPAC
145 } // namespace llvm
146 
147 #endif // LLVM_LIB_TARGET_LANAI_LANAIALUCODE_H
const int Lanai_PRE_OP
Definition: LanaiAluCode.h:45
This class represents lattice values for constants.
Definition: AllocatorList.h:23
static bool modifiesOp(unsigned AluOp)
Definition: LanaiAluCode.h:72
static const char * lanaiAluCodeToString(unsigned AluOp)
Definition: LanaiAluCode.h:76
static unsigned getAluOp(unsigned AluOp)
Definition: LanaiAluCode.h:53
static unsigned makePostOp(unsigned AluOp)
Definition: LanaiAluCode.h:67
StringSwitch & Case(StringLiteral S, T Value)
Definition: StringSwitch.h:67
NodeType
ISD::NodeType enum - This enum defines the target-independent operators for a SelectionDAG.
Definition: ISDOpcodes.h:38
Shift and rotation operations.
Definition: ISDOpcodes.h:409
LLVM_NODISCARD R Default(T Value)
Definition: StringSwitch.h:181
Simple integer binary arithmetic operators.
Definition: ISDOpcodes.h:200
static bool isPreOp(unsigned AluOp)
Definition: LanaiAluCode.h:58
A switch()-like statement whose cases are string literals.
Definition: StringSwitch.h:42
Carry-using nodes for multiple precision addition and subtraction.
Definition: ISDOpcodes.h:231
static ManagedStatic< OptionRegistry > OR
Definition: Options.cpp:30
const int Lanai_POST_OP
Definition: LanaiAluCode.h:46
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
static bool isPostOp(unsigned AluOp)
Definition: LanaiAluCode.h:60
static unsigned makePreOp(unsigned AluOp)
Definition: LanaiAluCode.h:62
static AluCode stringToLanaiAluCode(StringRef S)
Definition: LanaiAluCode.h:103
Bitwise operators - logical and, logical or, logical xor.
Definition: ISDOpcodes.h:386
static unsigned encodeLanaiAluCode(unsigned AluOp)
Definition: LanaiAluCode.h:48
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
static AluCode isdToLanaiAluCode(ISD::NodeType Node_type)
Definition: LanaiAluCode.h:118