1 //===-- MCInstPrinter.cpp - Convert an MCInst to target assembly syntax ---===//
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 #include "llvm/MC/MCInstPrinter.h"
11 #include "llvm/ADT/StringRef.h"
12 #include "llvm/MC/MCAsmInfo.h"
13 #include "llvm/MC/MCInstrInfo.h"
14 #include "llvm/Support/ErrorHandling.h"
15 #include "llvm/Support/Format.h"
16 #include "llvm/Support/raw_ostream.h"
17 using namespace llvm;
18
dumpBytes(ArrayRef<uint8_t> bytes,raw_ostream & OS)19 void llvm::dumpBytes(ArrayRef<uint8_t> bytes, raw_ostream &OS) {
20 static const char hex_rep[] = "0123456789abcdef";
21 for (char i: bytes) {
22 OS << hex_rep[(i & 0xF0) >> 4];
23 OS << hex_rep[i & 0xF];
24 OS << ' ';
25 }
26 }
27
~MCInstPrinter()28 MCInstPrinter::~MCInstPrinter() {
29 }
30
31 /// getOpcodeName - Return the name of the specified opcode enum (e.g.
32 /// "MOV32ri") or empty if we can't resolve it.
getOpcodeName(unsigned Opcode) const33 StringRef MCInstPrinter::getOpcodeName(unsigned Opcode) const {
34 return MII.getName(Opcode);
35 }
36
printRegName(raw_ostream & OS,unsigned RegNo) const37 void MCInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
38 llvm_unreachable("Target should implement this");
39 }
40
printAnnotation(raw_ostream & OS,StringRef Annot)41 void MCInstPrinter::printAnnotation(raw_ostream &OS, StringRef Annot) {
42 if (!Annot.empty()) {
43 if (CommentStream) {
44 (*CommentStream) << Annot;
45 // By definition (see MCInstPrinter.h), CommentStream must end with
46 // a newline after each comment.
47 if (Annot.back() != '\n')
48 (*CommentStream) << '\n';
49 } else
50 OS << " " << MAI.getCommentString() << " " << Annot;
51 }
52 }
53
54 /// Utility functions to make adding mark ups simpler.
markup(StringRef s) const55 StringRef MCInstPrinter::markup(StringRef s) const {
56 if (getUseMarkup())
57 return s;
58 else
59 return "";
60 }
markup(StringRef a,StringRef b) const61 StringRef MCInstPrinter::markup(StringRef a, StringRef b) const {
62 if (getUseMarkup())
63 return a;
64 else
65 return b;
66 }
67
68 // For asm-style hex (e.g. 0ffh) the first digit always has to be a number.
needsLeadingZero(uint64_t Value)69 static bool needsLeadingZero(uint64_t Value)
70 {
71 while(Value)
72 {
73 uint64_t digit = (Value >> 60) & 0xf;
74 if (digit != 0)
75 return (digit >= 0xa);
76 Value <<= 4;
77 }
78 return false;
79 }
80
formatDec(int64_t Value) const81 format_object<int64_t> MCInstPrinter::formatDec(int64_t Value) const {
82 return format("%" PRId64, Value);
83 }
84
formatHex(int64_t Value) const85 format_object<int64_t> MCInstPrinter::formatHex(int64_t Value) const {
86 switch(PrintHexStyle) {
87 case HexStyle::C:
88 if (Value < 0)
89 return format("-0x%" PRIx64, -Value);
90 else
91 return format("0x%" PRIx64, Value);
92 case HexStyle::Asm:
93 if (Value < 0) {
94 if (needsLeadingZero((uint64_t)(-Value)))
95 return format("-0%" PRIx64 "h", -Value);
96 else
97 return format("-%" PRIx64 "h", -Value);
98 } else {
99 if (needsLeadingZero((uint64_t)(Value)))
100 return format("0%" PRIx64 "h", Value);
101 else
102 return format("%" PRIx64 "h", Value);
103 }
104 }
105 llvm_unreachable("unsupported print style");
106 }
107
formatHex(uint64_t Value) const108 format_object<uint64_t> MCInstPrinter::formatHex(uint64_t Value) const {
109 switch(PrintHexStyle) {
110 case HexStyle::C:
111 return format("0x%" PRIx64, Value);
112 case HexStyle::Asm:
113 if (needsLeadingZero(Value))
114 return format("0%" PRIx64 "h", Value);
115 else
116 return format("%" PRIx64 "h", Value);
117 }
118 llvm_unreachable("unsupported print style");
119 }
120