LLVM 19.0.0git
ARCInstPrinter.cpp
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1//===- ARCInstPrinter.cpp - ARC MCInst to assembly syntax -------*- C++ -*-===//
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// This class prints an ARC MCInst to a .s file.
10//
11//===----------------------------------------------------------------------===//
12
13#include "ARCInstPrinter.h"
16#include "llvm/MC/MCExpr.h"
17#include "llvm/MC/MCInst.h"
18#include "llvm/MC/MCInstrInfo.h"
19#include "llvm/MC/MCSymbol.h"
21#include "llvm/Support/Debug.h"
23
24using namespace llvm;
25
26#define DEBUG_TYPE "asm-printer"
27
28#include "ARCGenAsmWriter.inc"
29
30template <class T>
31static const char *BadConditionCode(T cc) {
32 LLVM_DEBUG(dbgs() << "Unknown condition code passed: " << cc << "\n");
33 return "{unknown-cc}";
34}
35
36static const char *ARCBRCondCodeToString(ARCCC::BRCondCode BRCC) {
37 switch (BRCC) {
38 case ARCCC::BREQ:
39 return "eq";
40 case ARCCC::BRNE:
41 return "ne";
42 case ARCCC::BRLT:
43 return "lt";
44 case ARCCC::BRGE:
45 return "ge";
46 case ARCCC::BRLO:
47 return "lo";
48 case ARCCC::BRHS:
49 return "hs";
50 }
51 return BadConditionCode(BRCC);
52}
53
55 switch (CC) {
56 case ARCCC::EQ:
57 return "eq";
58 case ARCCC::NE:
59 return "ne";
60 case ARCCC::P:
61 return "p";
62 case ARCCC::N:
63 return "n";
64 case ARCCC::HS:
65 return "hs";
66 case ARCCC::LO:
67 return "lo";
68 case ARCCC::GT:
69 return "gt";
70 case ARCCC::GE:
71 return "ge";
72 case ARCCC::VS:
73 return "vs";
74 case ARCCC::VC:
75 return "vc";
76 case ARCCC::LT:
77 return "lt";
78 case ARCCC::LE:
79 return "le";
80 case ARCCC::HI:
81 return "hi";
82 case ARCCC::LS:
83 return "ls";
84 case ARCCC::PNZ:
85 return "pnz";
86 case ARCCC::AL:
87 return "al";
88 case ARCCC::NZ:
89 return "nz";
90 case ARCCC::Z:
91 return "z";
92 }
93 return BadConditionCode(CC);
94}
95
98}
99
101 StringRef Annot, const MCSubtargetInfo &STI,
102 raw_ostream &O) {
104 printAnnotation(O, Annot);
105}
106
107static void printExpr(const MCExpr *Expr, const MCAsmInfo *MAI,
108 raw_ostream &OS) {
109 int Offset = 0;
110 const MCSymbolRefExpr *SRE;
111
112 if (const auto *CE = dyn_cast<MCConstantExpr>(Expr)) {
113 OS << "0x";
114 OS.write_hex(CE->getValue());
115 return;
116 }
117
118 if (const auto *BE = dyn_cast<MCBinaryExpr>(Expr)) {
119 SRE = dyn_cast<MCSymbolRefExpr>(BE->getLHS());
120 const auto *CE = dyn_cast<MCConstantExpr>(BE->getRHS());
121 assert(SRE && CE && "Binary expression must be sym+const.");
122 Offset = CE->getValue();
123 } else {
124 SRE = dyn_cast<MCSymbolRefExpr>(Expr);
125 assert(SRE && "Unexpected MCExpr type.");
126 }
128
129 // Symbols are prefixed with '@'
130 OS << '@';
131 SRE->getSymbol().print(OS, MAI);
132
133 if (Offset) {
134 if (Offset > 0)
135 OS << '+';
136 OS << Offset;
137 }
138}
139
140void ARCInstPrinter::printOperand(const MCInst *MI, unsigned OpNum,
141 raw_ostream &O) {
142 const MCOperand &Op = MI->getOperand(OpNum);
143 if (Op.isReg()) {
144 printRegName(O, Op.getReg());
145 return;
146 }
147
148 if (Op.isImm()) {
149 O << Op.getImm();
150 return;
151 }
152
153 assert(Op.isExpr() && "unknown operand kind in printOperand");
154 printExpr(Op.getExpr(), &MAI, O);
155}
156
157void ARCInstPrinter::printMemOperandRI(const MCInst *MI, unsigned OpNum,
158 raw_ostream &O) {
159 const MCOperand &base = MI->getOperand(OpNum);
160 const MCOperand &offset = MI->getOperand(OpNum + 1);
161 assert(base.isReg() && "Base should be register.");
162 assert(offset.isImm() && "Offset should be immediate.");
163 printRegName(O, base.getReg());
164 O << "," << offset.getImm();
165}
166
167void ARCInstPrinter::printPredicateOperand(const MCInst *MI, unsigned OpNum,
168 raw_ostream &O) {
169
170 const MCOperand &Op = MI->getOperand(OpNum);
171 assert(Op.isImm() && "Predicate operand is immediate.");
173}
174
175void ARCInstPrinter::printBRCCPredicateOperand(const MCInst *MI, unsigned OpNum,
176 raw_ostream &O) {
177 const MCOperand &Op = MI->getOperand(OpNum);
178 assert(Op.isImm() && "Predicate operand is immediate.");
180}
181
183 raw_ostream &O) {
184 O << ARCCondCodeToString((ARCCC::CondCode)MI->getOperand(OpNum).getImm());
185}
186
187void ARCInstPrinter::printU6ShiftedBy(unsigned ShiftBy, const MCInst *MI,
188 int OpNum, raw_ostream &O) {
189 const MCOperand &MO = MI->getOperand(OpNum);
190 if (MO.isImm()) {
191 unsigned Value = MO.getImm();
192 unsigned Value2 = Value >> ShiftBy;
193 if (Value2 > 0x3F || (Value2 << ShiftBy != Value)) {
194 errs() << "!!! Instruction has out-of-range U6 immediate operand:\n"
195 << " Opcode is " << MI->getOpcode() << "; operand value is "
196 << Value;
197 if (ShiftBy)
198 errs() << " scaled by " << (1 << ShiftBy) << "\n";
199 assert(false && "instruction has wrong format");
200 }
201 }
202 printOperand(MI, OpNum, O);
203}
204
205void ARCInstPrinter::printU6(const MCInst *MI, int OpNum, raw_ostream &O) {
206 printU6ShiftedBy(0, MI, OpNum, O);
207}
static const char * BadConditionCode(T cc)
static void printExpr(const MCExpr *Expr, const MCAsmInfo *MAI, raw_ostream &OS)
static const char * ARCBRCondCodeToString(ARCCC::BRCondCode BRCC)
static const char * ARCCondCodeToString(ARCCC::CondCode CC)
This file contains the declaration of the ARCInstPrinter class, which is used to print ARC MCInst to ...
#define LLVM_DEBUG(X)
Definition: Debug.h:101
IRTranslator LLVM IR MI
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
raw_pwrite_stream & OS
This file contains some functions that are useful when dealing with strings.
void printCCOperand(const MCInst *MI, int OpNum, raw_ostream &O)
void printInst(const MCInst *MI, uint64_t Address, StringRef Annot, const MCSubtargetInfo &STI, raw_ostream &O) override
Print the specified MCInst to the specified raw_ostream.
static const char * getRegisterName(MCRegister Reg)
void printInstruction(const MCInst *MI, uint64_t Address, raw_ostream &O)
void printRegName(raw_ostream &OS, MCRegister Reg) const override
Print the assembler register name.
void printU6(const MCInst *MI, int OpNum, raw_ostream &O)
This class represents an Operation in the Expression.
This class is intended to be used as a base class for asm properties and features specific to the tar...
Definition: MCAsmInfo.h:56
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:35
void printAnnotation(raw_ostream &OS, StringRef Annot)
Utility function for printing annotations.
const MCAsmInfo & MAI
Definition: MCInstPrinter.h:51
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:184
Instances of this class represent operands of the MCInst class.
Definition: MCInst.h:36
int64_t getImm() const
Definition: MCInst.h:80
bool isImm() const
Definition: MCInst.h:62
unsigned getReg() const
Returns the register number.
Definition: MCInst.h:69
bool isReg() const
Definition: MCInst.h:61
Wrapper class representing physical registers. Should be passed by value.
Definition: MCRegister.h:33
Generic base class for all target subtargets.
Represent a reference to a symbol from inside an expression.
Definition: MCExpr.h:192
const MCSymbol & getSymbol() const
Definition: MCExpr.h:408
VariantKind getKind() const
Definition: MCExpr.h:410
void print(raw_ostream &OS, const MCAsmInfo *MAI) const
print - Print the value to the stream OS.
Definition: MCSymbol.cpp:58
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
std::string lower() const
Definition: StringRef.cpp:111
LLVM Value Representation.
Definition: Value.h:74
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
raw_ostream & write_hex(unsigned long long N)
Output N in hexadecimal, without any prefix or padding.
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
@ Offset
Definition: DWP.cpp:456
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:163
raw_fd_ostream & errs()
This returns a reference to a raw_ostream for standard error.