lib/MC/MCAsmInfo.cpp

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