MCAsmInfo.cpp revision b9a01bcf486814a44098745920d43daaf9f7c260 
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  AllowPeriodsInName = true;
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  GPRel32Directive = 0;
52  GlobalDirective = "\t.globl\t";
53  HasSetDirective = true;
54  HasLCOMMDirective = false;
55  COMMDirectiveAlignmentIsInBytes = true;
56  HasDotTypeDotSizeDirective = true;
57  HasSingleParameterDotFile = true;
58  HasNoDeadStrip = false;
59  WeakRefDirective = 0;
60  WeakDefDirective = 0;
61  LinkOnceDirective = 0;
62  HiddenVisibilityAttr = MCSA_Hidden;
63  ProtectedVisibilityAttr = MCSA_Protected;
64  HasLEB128 = false;
65  HasDotLocAndDotFile = false;
66  SupportsDebugInformation = false;
67  ExceptionsType = ExceptionHandling::None;
68  DwarfRequiresFrameSection = true;
69  DwarfUsesInlineInfoSection = false;
70  DwarfSectionOffsetDirective = 0;
71  HasMicrosoftFastStdCallMangling = false;
72
73  AsmTransCBE = 0;
74}
75
76MCAsmInfo::~MCAsmInfo() {
77}
78
79
80unsigned MCAsmInfo::getULEB128Size(unsigned Value) {
81  unsigned Size = 0;
82  do {
83    Value >>= 7;
84    Size += sizeof(int8_t);
85  } while (Value);
86  return Size;
87}
88
89unsigned MCAsmInfo::getSLEB128Size(int Value) {
90  unsigned Size = 0;
91  int Sign = Value >> (8 * sizeof(Value) - 1);
92  bool IsMore;
93
94  do {
95    unsigned Byte = Value & 0x7f;
96    Value >>= 7;
97    IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
98    Size += sizeof(int8_t);
99  } while (IsMore);
100  return Size;
101}
102