lib/Target/PowerPC/MCTargetDesc/PPCMCAsmInfo.cpp

   1 //===-- PPCMCAsmInfo.cpp - PPC asm properties -----------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file contains the declarations of the MCAsmInfoDarwin properties.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "PPCMCAsmInfo.h"
  14 #include "llvm/ADT/Triple.h"
  15
  16 using namespace llvm;
  17
  18 void PPCMCAsmInfoDarwin::anchor() { }
  19
  20 PPCMCAsmInfoDarwin::PPCMCAsmInfoDarwin(bool is64Bit, const Triple& T) {
  21   if (is64Bit) {
  22     CodePointerSize = CalleeSaveStackSlotSize = 8;
  23   }
  24   IsLittleEndian = false;
  25
  26   SeparatorString = "@";
  27   CommentString = ";";
  28   ExceptionsType = ExceptionHandling::DwarfCFI;
  29
  30   if (!is64Bit)
  31     Data64bitsDirective = nullptr; // We can't emit a 64-bit unit in PPC32 mode.
  32
  33   AssemblerDialect = 1;           // New-Style mnemonics.
  34   SupportsDebugInformation= true; // Debug information.
  35
  36   // The installed assembler for OSX < 10.6 lacks some directives.
  37   // FIXME: this should really be a check on the assembler characteristics
  38   // rather than OS version
  39   if (T.isMacOSX() && T.isMacOSXVersionLT(10, 6))
  40     HasWeakDefCanBeHiddenDirective = false;
  41
  42   UseIntegratedAssembler = true;
  43 }
  44
  45 void PPCELFMCAsmInfo::anchor() { }
  46
  47 PPCELFMCAsmInfo::PPCELFMCAsmInfo(bool is64Bit, const Triple& T) {
  48   // FIXME: This is not always needed. For example, it is not needed in the
  49   // v2 abi.
  50   NeedsLocalForSize = true;
  51
  52   if (is64Bit) {
  53     CodePointerSize = CalleeSaveStackSlotSize = 8;
  54   }
  55   IsLittleEndian = T.getArch() == Triple::ppc64le;
  56
  57   // ".comm align is in bytes but .align is pow-2."
  58   AlignmentIsInBytes = false;
  59
  60   CommentString = "#";
  61
  62   // Uses '.section' before '.bss' directive
  63   UsesELFSectionDirectiveForBSS = true;
  64
  65   // Debug Information
  66   SupportsDebugInformation = true;
  67
  68   DollarIsPC = true;
  69
  70   // Set up DWARF directives
  71   MinInstAlignment = 4;
  72
  73   // Exceptions handling
  74   ExceptionsType = ExceptionHandling::DwarfCFI;
  75
  76   ZeroDirective = "\t.space\t";
  77   Data64bitsDirective = is64Bit ? "\t.quad\t" : nullptr;
  78   AssemblerDialect = 1;           // New-Style mnemonics.
  79   LCOMMDirectiveAlignmentType = LCOMM::ByteAlignment;
  80
  81   UseIntegratedAssembler = true;
  82 }
  83
  84 void PPCXCOFFMCAsmInfo::anchor() {}
  85
  86 PPCXCOFFMCAsmInfo::PPCXCOFFMCAsmInfo(bool Is64Bit, const Triple &T) {
  87   assert(!IsLittleEndian && "Little-endian XCOFF not supported.");
  88   CodePointerSize = CalleeSaveStackSlotSize = Is64Bit ? 8 : 4;
  89   ZeroDirective = "\t.space\t";
  90 }