Replace string GNU Triples with llvm::Triple in MCAsmBackend subclasses and create...

[oota-llvm.git] / lib / Target / R600 / MCTargetDesc / AMDGPUAsmBackend.cpp

diff --git a/lib/Target/R600/MCTargetDesc/AMDGPUAsmBackend.cpp b/lib/Target/R600/MCTargetDesc/AMDGPUAsmBackend.cpp
index 8f41ebbdc510fc0f34e4d0565407674cbceb78f0..8bed2deef4cdf9ec43eee74f274386bbdf11ef46 100644 (file)
--- a/lib/Target/R600/MCTargetDesc/AMDGPUAsmBackend.cpp
+++ b/lib/Target/R600/MCTargetDesc/AMDGPUAsmBackend.cpp
@@ -9,9 +9,11 @@
 //===----------------------------------------------------------------------===//
 
 #include "MCTargetDesc/AMDGPUMCTargetDesc.h"
+#include "MCTargetDesc/AMDGPUFixupKinds.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/MC/MCAsmBackend.h"
 #include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCFixupKindInfo.h"
 #include "llvm/MC/MCObjectWriter.h"
 #include "llvm/MC/MCValue.h"
 #include "llvm/Support/TargetRegistry.h"
@@ -22,20 +24,19 @@ namespace {
 
 class AMDGPUMCObjectWriter : public MCObjectWriter {
 public:
-  AMDGPUMCObjectWriter(raw_ostream &OS) : MCObjectWriter(OS, true) { }
-  virtual void ExecutePostLayoutBinding(MCAssembler &Asm,
-                                        const MCAsmLayout &Layout) {
+  AMDGPUMCObjectWriter(raw_pwrite_stream &OS) : MCObjectWriter(OS, true) {}
+  void executePostLayoutBinding(MCAssembler &Asm,
+                                const MCAsmLayout &Layout) override {
     //XXX: Implement if necessary.
   }
-  virtual void RecordRelocation(const MCAssembler &Asm,
-                                const MCAsmLayout &Layout,
-                                const MCFragment *Fragment,
-                                const MCFixup &Fixup,
-                                MCValue Target, uint64_t &FixedValue) {
+  void recordRelocation(MCAssembler &Asm, const MCAsmLayout &Layout,
+                        const MCFragment *Fragment, const MCFixup &Fixup,
+                        MCValue Target, bool &IsPCRel,
+                        uint64_t &FixedValue) override {
     assert(!"Not implemented");
   }
 
-  virtual void WriteObject(MCAssembler &Asm, const MCAsmLayout &Layout);
+  void writeObject(MCAssembler &Asm, const MCAsmLayout &Layout) override;
 
 };
 
@@ -44,47 +45,100 @@ public:
   AMDGPUAsmBackend(const Target &T)
     : MCAsmBackend() {}
 
-  virtual AMDGPUMCObjectWriter *createObjectWriter(raw_ostream &OS) const;
-  virtual unsigned getNumFixupKinds() const { return 0; };
-  virtual void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize,
-                          uint64_t Value) const;
-  virtual bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value,
-                                    const MCInstFragment *DF,
-                                    const MCAsmLayout &Layout) const {
+  unsigned getNumFixupKinds() const override { return AMDGPU::NumTargetFixupKinds; };
+  void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize,
+                  uint64_t Value, bool IsPCRel) const override;
+  bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value,
+                            const MCRelaxableFragment *DF,
+                            const MCAsmLayout &Layout) const override {
     return false;
   }
-  virtual void relaxInstruction(const MCInst &Inst, MCInst &Res) const {
+  void relaxInstruction(const MCInst &Inst, MCInst &Res) const override {
     assert(!"Not implemented");
   }
-  virtual bool mayNeedRelaxation(const MCInst &Inst) const { return false; }
-  virtual bool writeNopData(uint64_t Count, MCObjectWriter *OW) const {
-    return true;
-  }
+  bool mayNeedRelaxation(const MCInst &Inst) const override { return false; }
+  bool writeNopData(uint64_t Count, MCObjectWriter *OW) const override;
+
+  const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override;
 };
 
 } //End anonymous namespace
 
-void AMDGPUMCObjectWriter::WriteObject(MCAssembler &Asm,
+void AMDGPUMCObjectWriter::writeObject(MCAssembler &Asm,
                                        const MCAsmLayout &Layout) {
   for (MCAssembler::iterator I = Asm.begin(), E = Asm.end(); I != E; ++I) {
-    Asm.writeSectionData(I, Layout);
+    Asm.writeSectionData(&*I, Layout);
   }
 }
 
-MCAsmBackend *llvm::createAMDGPUAsmBackend(const Target &T, StringRef TT,
-                                           StringRef CPU) {
-  return new AMDGPUAsmBackend(T);
+void AMDGPUAsmBackend::applyFixup(const MCFixup &Fixup, char *Data,
+                                  unsigned DataSize, uint64_t Value,
+                                  bool IsPCRel) const {
+
+  switch ((unsigned)Fixup.getKind()) {
+    default: llvm_unreachable("Unknown fixup kind");
+    case AMDGPU::fixup_si_sopp_br: {
+      uint16_t *Dst = (uint16_t*)(Data + Fixup.getOffset());
+      *Dst = (Value - 4) / 4;
+      break;
+    }
+
+    case AMDGPU::fixup_si_rodata: {
+      uint32_t *Dst = (uint32_t*)(Data + Fixup.getOffset());
+      *Dst = Value;
+      break;
+    }
+
+    case AMDGPU::fixup_si_end_of_text: {
+      uint32_t *Dst = (uint32_t*)(Data + Fixup.getOffset());
+      // The value points to the last instruction in the text section, so we
+      // need to add 4 bytes to get to the start of the constants.
+      *Dst = Value + 4;
+      break;
+    }
+  }
 }
 
-AMDGPUMCObjectWriter * AMDGPUAsmBackend::createObjectWriter(
-                                                        raw_ostream &OS) const {
-  return new AMDGPUMCObjectWriter(OS);
+const MCFixupKindInfo &AMDGPUAsmBackend::getFixupKindInfo(
+                                                       MCFixupKind Kind) const {
+  const static MCFixupKindInfo Infos[AMDGPU::NumTargetFixupKinds] = {
+    // name                   offset bits  flags
+    { "fixup_si_sopp_br",     0,     16,   MCFixupKindInfo::FKF_IsPCRel },
+    { "fixup_si_rodata",      0,     32,   0 },
+    { "fixup_si_end_of_text", 0,     32,   MCFixupKindInfo::FKF_IsPCRel }
+  };
+
+  if (Kind < FirstTargetFixupKind)
+    return MCAsmBackend::getFixupKindInfo(Kind);
+
+  return Infos[Kind - FirstTargetFixupKind];
 }
 
-void AMDGPUAsmBackend::applyFixup(const MCFixup &Fixup, char *Data,
-                                  unsigned DataSize, uint64_t Value) const {
+bool AMDGPUAsmBackend::writeNopData(uint64_t Count, MCObjectWriter *OW) const {
+  OW->WriteZeros(Count);
+
+  return true;
+}
+
+//===----------------------------------------------------------------------===//
+// ELFAMDGPUAsmBackend class
+//===----------------------------------------------------------------------===//
+
+namespace {
+
+class ELFAMDGPUAsmBackend : public AMDGPUAsmBackend {
+public:
+  ELFAMDGPUAsmBackend(const Target &T) : AMDGPUAsmBackend(T) { }
+
+  MCObjectWriter *createObjectWriter(raw_pwrite_stream &OS) const override {
+    return createAMDGPUELFObjectWriter(OS);
+  }
+};
+
+} // end anonymous namespace
 
-  uint16_t *Dst = (uint16_t*)(Data + Fixup.getOffset());
-  assert(Fixup.getKind() == FK_PCRel_4);
-  *Dst = (Value - 4) / 4;
+MCAsmBackend *llvm::createAMDGPUAsmBackend(const Target &T,
+                                           const MCRegisterInfo &MRI,
+                                           const Triple &TT, StringRef CPU) {
+  return new ELFAMDGPUAsmBackend(T);
 }