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   FirstOperandColumn = 0;
  30   MaxOperandLength = 0;
  31   GlobalPrefix = "";
  32   PrivateGlobalPrefix = ".";
  33   LinkerPrivateGlobalPrefix = "";
  34   JumpTableSpecialLabelPrefix = 0;
  35   GlobalVarAddrPrefix = "";
  36   GlobalVarAddrSuffix = "";
  37   FunctionAddrPrefix = "";
  38   FunctionAddrSuffix = "";
  39   PersonalityPrefix = "";
  40   PersonalitySuffix = "";
  41   NeedsIndirectEncoding = false;
  42   InlineAsmStart = "#APP";
  43   InlineAsmEnd = "#NO_APP";
  44   AssemblerDialect = 0;
  45   AllowQuotesInName = false;
  46   ZeroDirective = "\t.zero\t";
  47   ZeroDirectiveSuffix = 0;
  48   AsciiDirective = "\t.ascii\t";
  49   AscizDirective = "\t.asciz\t";
  50   Data8bitsDirective = "\t.byte\t";
  51   Data16bitsDirective = "\t.short\t";
  52   Data32bitsDirective = "\t.long\t";
  53   Data64bitsDirective = "\t.quad\t";
  54   AlignDirective = "\t.align\t";
  55   AlignmentIsInBytes = true;
  56   TextAlignFillValue = 0;
  57   SwitchToSectionDirective = "\t.section\t";
  58   TextSectionStartSuffix = "";
  59   DataSectionStartSuffix = "";
  60   JumpTableDirective = 0;
  61   GlobalDirective = "\t.globl\t";
  62   SetDirective = 0;
  63   LCOMMDirective = 0;
  64   COMMDirective = "\t.comm\t";
  65   COMMDirectiveTakesAlignment = true;
  66   HasDotTypeDotSizeDirective = true;
  67   HasSingleParameterDotFile = true;
  68   UsedDirective = 0;
  69   WeakRefDirective = 0;
  70   WeakDefDirective = 0;
  71   // FIXME: These are ELFish - move to ELFTAI.
  72   HiddenDirective = "\t.hidden\t";
  73   ProtectedDirective = "\t.protected\t";
  74   AbsoluteDebugSectionOffsets = false;
  75   AbsoluteEHSectionOffsets = false;
  76   HasLEB128 = false;
  77   HasDotLocAndDotFile = false;
  78   SupportsDebugInformation = false;
  79   SupportsExceptionHandling = false;
  80   DwarfRequiresFrameSection = true;
  81   DwarfUsesInlineInfoSection = false;
  82   Is_EHSymbolPrivate = true;
  83   GlobalEHDirective = 0;
  84   SupportsWeakOmittedEHFrame = true;
  85   DwarfSectionOffsetDirective = 0;
  86
  87   AsmTransCBE = 0;
  88 }
  89
  90 TargetAsmInfo::~TargetAsmInfo() {
  91 }
  92
  93
  94 unsigned TargetAsmInfo::getULEB128Size(unsigned Value) {
  95   unsigned Size = 0;
  96   do {
  97     Value >>= 7;
  98     Size += sizeof(int8_t);
  99   } while (Value);
 100   return Size;
 101 }
 102
 103 unsigned TargetAsmInfo::getSLEB128Size(int Value) {
 104   unsigned Size = 0;
 105   int Sign = Value >> (8 * sizeof(Value) - 1);
 106   bool IsMore;
 107
 108   do {
 109     unsigned Byte = Value & 0x7f;
 110     Value >>= 7;
 111     IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
 112     Size += sizeof(int8_t);
 113   } while (IsMore);
 114   return Size;
 115 }