MCAsmInfo.cpp revision 8eeba35babf3114966fc4e6e8522057e46b610db 
1//===-- MCAsmInfo.cpp - Asm Info -------------------------------------------==//
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// This file defines target asm properties related what form asm statements
11// should take.
12//
13//===----------------------------------------------------------------------===//
14
15#include "llvm/MC/MCAsmInfo.h"
16#include "llvm/System/DataTypes.h"
17#include <cctype>
18#include <cstring>
19using namespace llvm;
20
21MCAsmInfo::MCAsmInfo() {
22  HasMachoZeroFillDirective = false;
23  HasStaticCtorDtorReferenceInStaticMode = false;
24  NonexecutableStackDirective = 0;
25  NeedsSet = false;
26  MaxInstLength = 4;
27  PCSymbol = "$";
28  SeparatorChar = ';';
29  CommentColumn = 60;
30  CommentString = "#";
31  GlobalPrefix = "";
32  PrivateGlobalPrefix = ".";
33  LinkerPrivateGlobalPrefix = "";
34  InlineAsmStart = "APP";
35  InlineAsmEnd = "NO_APP";
36  AssemblerDialect = 0;
37  AllowQuotesInName = false;
38  AllowNameToStartWithDigit = false;
39  ZeroDirective = "\t.zero\t";
40  AsciiDirective = "\t.ascii\t";
41  AscizDirective = "\t.asciz\t";
42  Data8bitsDirective = "\t.byte\t";
43  Data16bitsDirective = "\t.short\t";
44  Data32bitsDirective = "\t.long\t";
45  Data64bitsDirective = "\t.quad\t";
46  SunStyleELFSectionSwitchSyntax = false;
47  UsesELFSectionDirectiveForBSS = false;
48  AlignDirective = "\t.align\t";
49  AlignmentIsInBytes = true;
50  TextAlignFillValue = 0;
51  JumpTableDirective = 0;
52  PICJumpTableDirective = 0;
53  GlobalDirective = "\t.globl\t";
54  SetDirective = 0;
55  LCOMMDirective = 0;
56  COMMDirective = "\t.comm\t";
57  COMMDirectiveTakesAlignment = true;
58  HasDotTypeDotSizeDirective = true;
59  HasSingleParameterDotFile = true;
60  UsedDirective = 0;
61  WeakRefDirective = 0;
62  WeakDefDirective = 0;
63  LinkOnceDirective = 0;
64  // FIXME: These are ELFish - move to ELFMAI.
65  HiddenDirective = "\t.hidden\t";
66  ProtectedDirective = "\t.protected\t";
67  AbsoluteDebugSectionOffsets = false;
68  AbsoluteEHSectionOffsets = false;
69  HasLEB128 = false;
70  HasDotLocAndDotFile = false;
71  SupportsDebugInformation = false;
72  ExceptionsType = ExceptionHandling::None;
73  DwarfRequiresFrameSection = true;
74  DwarfUsesInlineInfoSection = false;
75  Is_EHSymbolPrivate = true;
76  GlobalEHDirective = 0;
77  SupportsWeakOmittedEHFrame = true;
78  DwarfSectionOffsetDirective = 0;
79
80  AsmTransCBE = 0;
81}
82
83MCAsmInfo::~MCAsmInfo() {
84}
85
86
87unsigned MCAsmInfo::getULEB128Size(unsigned Value) {
88  unsigned Size = 0;
89  do {
90    Value >>= 7;
91    Size += sizeof(int8_t);
92  } while (Value);
93  return Size;
94}
95
96unsigned MCAsmInfo::getSLEB128Size(int Value) {
97  unsigned Size = 0;
98  int Sign = Value >> (8 * sizeof(Value) - 1);
99  bool IsMore;
100
101  do {
102    unsigned Byte = Value & 0x7f;
103    Value >>= 7;
104    IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
105    Size += sizeof(int8_t);
106  } while (IsMore);
107  return Size;
108}
109