MCAsmInfo.cpp revision 208954
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 HasMachoTBSSDirective = false; 25 HasStaticCtorDtorReferenceInStaticMode = false; 26 MaxInstLength = 4; 27 PCSymbol = "$"; 28 SeparatorChar = ';'; 29 CommentColumn = 40; 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 AllowPeriodsInName = true; 40 ZeroDirective = "\t.zero\t"; 41 AsciiDirective = "\t.ascii\t"; 42 AscizDirective = "\t.asciz\t"; 43 Data8bitsDirective = "\t.byte\t"; 44 Data16bitsDirective = "\t.short\t"; 45 Data32bitsDirective = "\t.long\t"; 46 Data64bitsDirective = "\t.quad\t"; 47 SunStyleELFSectionSwitchSyntax = false; 48 UsesELFSectionDirectiveForBSS = false; 49 AlignDirective = "\t.align\t"; 50 AlignmentIsInBytes = true; 51 TextAlignFillValue = 0; 52 GPRel32Directive = 0; 53 GlobalDirective = "\t.globl\t"; 54 HasSetDirective = true; 55 HasLCOMMDirective = false; 56 COMMDirectiveAlignmentIsInBytes = true; 57 HasDotTypeDotSizeDirective = true; 58 HasSingleParameterDotFile = true; 59 HasNoDeadStrip = false; 60 WeakRefDirective = 0; 61 WeakDefDirective = 0; 62 LinkOnceDirective = 0; 63 HiddenVisibilityAttr = MCSA_Hidden; 64 ProtectedVisibilityAttr = MCSA_Protected; 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