MCAsmInfo.cpp revision 206274 
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  HasLEB128 = false;
64  HasDotLocAndDotFile = false;
65  SupportsDebugInformation = false;
66  ExceptionsType = ExceptionHandling::None;
67  DwarfRequiresFrameSection = true;
68  DwarfUsesInlineInfoSection = false;
69  DwarfSectionOffsetDirective = 0;
70  HasMicrosoftFastStdCallMangling = false;
71
72  AsmTransCBE = 0;
73}
74
75MCAsmInfo::~MCAsmInfo() {
76}
77
78
79unsigned MCAsmInfo::getULEB128Size(unsigned Value) {
80  unsigned Size = 0;
81  do {
82    Value >>= 7;
83    Size += sizeof(int8_t);
84  } while (Value);
85  return Size;
86}
87
88unsigned MCAsmInfo::getSLEB128Size(int Value) {
89  unsigned Size = 0;
90  int Sign = Value >> (8 * sizeof(Value) - 1);
91  bool IsMore;
92
93  do {
94    unsigned Byte = Value & 0x7f;
95    Value >>= 7;
96    IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
97    Size += sizeof(int8_t);
98  } while (IsMore);
99  return Size;
100}
101