MCAsmInfo.cpp revision 8a29fa6e02c8a76a71f43fc8bf4e51dd12bac4bc 
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  HasSubsectionsViaSymbols = false;
23  HasMachoZeroFillDirective = false;
24  HasStaticCtorDtorReferenceInStaticMode = false;
25  MaxInstLength = 4;
26  PCSymbol = "$";
27  SeparatorChar = ';';
28  CommentColumn = 40;
29  CommentString = "#";
30  GlobalPrefix = "";
31  PrivateGlobalPrefix = ".";
32  LinkerPrivateGlobalPrefix = "";
33  InlineAsmStart = "APP";
34  InlineAsmEnd = "NO_APP";
35  AssemblerDialect = 0;
36  AllowQuotesInName = false;
37  AllowNameToStartWithDigit = false;
38  ZeroDirective = "\t.zero\t";
39  AsciiDirective = "\t.ascii\t";
40  AscizDirective = "\t.asciz\t";
41  Data8bitsDirective = "\t.byte\t";
42  Data16bitsDirective = "\t.short\t";
43  Data32bitsDirective = "\t.long\t";
44  Data64bitsDirective = "\t.quad\t";
45  SunStyleELFSectionSwitchSyntax = false;
46  UsesELFSectionDirectiveForBSS = false;
47  AlignDirective = "\t.align\t";
48  AlignmentIsInBytes = true;
49  TextAlignFillValue = 0;
50  GPRel32Directive = 0;
51  GlobalDirective = "\t.globl\t";
52  HasSetDirective = true;
53  HasLCOMMDirective = false;
54  COMMDirectiveAlignmentIsInBytes = true;
55  HasDotTypeDotSizeDirective = true;
56  HasSingleParameterDotFile = true;
57  HasNoDeadStrip = false;
58  WeakRefDirective = 0;
59  WeakDefDirective = 0;
60  LinkOnceDirective = 0;
61  HiddenVisibilityAttr = MCSA_Hidden;
62  ProtectedVisibilityAttr = MCSA_Protected;
63  AbsoluteDebugSectionOffsets = false;
64  AbsoluteEHSectionOffsets = false;
65  HasLEB128 = false;
66  HasDotLocAndDotFile = false;
67  SupportsDebugInformation = false;
68  ExceptionsType = ExceptionHandling::None;
69  DwarfRequiresFrameSection = true;
70  DwarfUsesInlineInfoSection = false;
71  DwarfSectionOffsetDirective = 0;
72  HasMicrosoftFastStdCallMangling = false;
73
74  AsmTransCBE = 0;
75}
76
77MCAsmInfo::~MCAsmInfo() {
78}
79
80
81unsigned MCAsmInfo::getULEB128Size(unsigned Value) {
82  unsigned Size = 0;
83  do {
84    Value >>= 7;
85    Size += sizeof(int8_t);
86  } while (Value);
87  return Size;
88}
89
90unsigned MCAsmInfo::getSLEB128Size(int Value) {
91  unsigned Size = 0;
92  int Sign = Value >> (8 * sizeof(Value) - 1);
93  bool IsMore;
94
95  do {
96    unsigned Byte = Value & 0x7f;
97    Value >>= 7;
98    IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
99    Size += sizeof(int8_t);
100  } while (IsMore);
101  return Size;
102}
103