lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCAsmInfo.cpp

   1 //===-- MCTargetDesc/AMDGPUMCAsmInfo.cpp - Assembly Info ------------------===//
   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 /// \file
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "AMDGPUMCAsmInfo.h"
  11 #include "llvm/ADT/Triple.h"
  12 #include "llvm/MC/MCSubtargetInfo.h"
  13 #include "MCTargetDesc/AMDGPUMCTargetDesc.h"
  14
  15 using namespace llvm;
  16
  17 AMDGPUMCAsmInfo::AMDGPUMCAsmInfo(const Triple &TT) : MCAsmInfoELF() {
  18   CodePointerSize = (TT.getArch() == Triple::amdgcn) ? 8 : 4;
  19   StackGrowsUp = true;
  20   HasSingleParameterDotFile = false;
  21   //===------------------------------------------------------------------===//
  22   MinInstAlignment = 4;
  23
  24   // This is the maximum instruction encoded size for gfx10. With a known
  25   // subtarget, it can be reduced to 8 bytes.
  26   MaxInstLength = (TT.getArch() == Triple::amdgcn) ? 20 : 16;
  27   SeparatorString = "\n";
  28   CommentString = ";";
  29   PrivateLabelPrefix = "";
  30   InlineAsmStart = ";#ASMSTART";
  31   InlineAsmEnd = ";#ASMEND";
  32
  33   //===--- Data Emission Directives -------------------------------------===//
  34   SunStyleELFSectionSwitchSyntax = true;
  35   UsesELFSectionDirectiveForBSS = true;
  36
  37   //===--- Global Variable Emission Directives --------------------------===//
  38   HasAggressiveSymbolFolding = true;
  39   COMMDirectiveAlignmentIsInBytes = false;
  40   HasNoDeadStrip = true;
  41   WeakRefDirective = ".weakref\t";
  42   //===--- Dwarf Emission Directives -----------------------------------===//
  43   SupportsDebugInformation = true;
  44 }
  45
  46 bool AMDGPUMCAsmInfo::shouldOmitSectionDirective(StringRef SectionName) const {
  47   return SectionName == ".hsatext" || SectionName == ".hsadata_global_agent" ||
  48          SectionName == ".hsadata_global_program" ||
  49          SectionName == ".hsarodata_readonly_agent" ||
  50          MCAsmInfo::shouldOmitSectionDirective(SectionName);
  51 }
  52
  53 unsigned AMDGPUMCAsmInfo::getMaxInstLength(const MCSubtargetInfo *STI) const {
  54   if (!STI || STI->getTargetTriple().getArch() == Triple::r600)
  55     return MaxInstLength;
  56
  57   // Maximum for NSA encoded images
  58   if (STI->getFeatureBits()[AMDGPU::FeatureNSAEncoding])
  59     return 20;
  60
  61   // 64-bit instruction with 32-bit literal.
  62   if (STI->getFeatureBits()[AMDGPU::FeatureVOP3Literal])
  63     return 12;
  64
  65   return 8;
  66 }