lib/Target/TargetAsmInfo.cpp

   1 //===-- TargetAsmInfo.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/Target/TargetAsmInfo.h"
  16 #include <cctype>
  17 #include <cstring>
  18 using namespace llvm;
  19
  20 TargetAsmInfo::TargetAsmInfo() {
  21   ZeroFillDirective = 0;
  22   NonexecutableStackDirective = 0;
  23   NeedsSet = false;
  24   MaxInstLength = 4;
  25   PCSymbol = "$";
  26   SeparatorChar = ';';
  27   CommentColumn = 60;
  28   CommentString = "#";
  29   GlobalPrefix = "";
  30   PrivateGlobalPrefix = ".";
  31   LinkerPrivateGlobalPrefix = "";
  32   JumpTableSpecialLabelPrefix = 0;
  33   GlobalVarAddrPrefix = "";
  34   GlobalVarAddrSuffix = "";
  35   FunctionAddrPrefix = "";
  36   FunctionAddrSuffix = "";
  37   PersonalityPrefix = "";
  38   PersonalitySuffix = "";
  39   NeedsIndirectEncoding = false;
  40   InlineAsmStart = "APP";
  41   InlineAsmEnd = "NO_APP";
  42   AssemblerDialect = 0;
  43   AllowQuotesInName = false;
  44   ZeroDirective = "\t.zero\t";
  45   ZeroDirectiveSuffix = 0;
  46   AsciiDirective = "\t.ascii\t";
  47   AscizDirective = "\t.asciz\t";
  48   Data8bitsDirective = "\t.byte\t";
  49   Data16bitsDirective = "\t.short\t";
  50   Data32bitsDirective = "\t.long\t";
  51   Data64bitsDirective = "\t.quad\t";
  52   SunStyleELFSectionSwitchSyntax = false;
  53   UsesELFSectionDirectiveForBSS = false;
  54   AlignDirective = "\t.align\t";
  55   AlignmentIsInBytes = true;
  56   TextAlignFillValue = 0;
  57   JumpTableDirective = 0;
  58   PICJumpTableDirective = 0;
  59   GlobalDirective = "\t.globl\t";
  60   SetDirective = 0;
  61   LCOMMDirective = 0;
  62   COMMDirective = "\t.comm\t";
  63   COMMDirectiveTakesAlignment = true;
  64   HasDotTypeDotSizeDirective = true;
  65   HasSingleParameterDotFile = true;
  66   UsedDirective = 0;
  67   WeakRefDirective = 0;
  68   WeakDefDirective = 0;
  69   // FIXME: These are ELFish - move to ELFTAI.
  70   HiddenDirective = "\t.hidden\t";
  71   ProtectedDirective = "\t.protected\t";
  72   AbsoluteDebugSectionOffsets = false;
  73   AbsoluteEHSectionOffsets = false;
  74   HasLEB128 = false;
  75   HasDotLocAndDotFile = false;
  76   SupportsDebugInformation = false;
  77   ExceptionsType = ExceptionHandling::None;
  78   DwarfRequiresFrameSection = true;
  79   DwarfUsesInlineInfoSection = false;
  80   Is_EHSymbolPrivate = true;
  81   GlobalEHDirective = 0;
  82   SupportsWeakOmittedEHFrame = true;
  83   DwarfSectionOffsetDirective = 0;
  84
  85   AsmTransCBE = 0;
  86 }
  87
  88 TargetAsmInfo::~TargetAsmInfo() {
  89 }
  90
  91
  92 unsigned TargetAsmInfo::getULEB128Size(unsigned Value) {
  93   unsigned Size = 0;
  94   do {
  95     Value >>= 7;
  96     Size += sizeof(int8_t);
  97   } while (Value);
  98   return Size;
  99 }
 100
 101 unsigned TargetAsmInfo::getSLEB128Size(int Value) {
 102   unsigned Size = 0;
 103   int Sign = Value >> (8 * sizeof(Value) - 1);
 104   bool IsMore;
 105
 106   do {
 107     unsigned Byte = Value & 0x7f;
 108     Value >>= 7;
 109     IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
 110     Size += sizeof(int8_t);
 111   } while (IsMore);
 112   return Size;
 113 }