Sort relocation entries before they are written out to a file. MIPS ABI

[oota-llvm.git] / lib / Target / Mips / MCTargetDesc / MipsMCCodeEmitter.cpp

diff --git a/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp b/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
index a2ee1f280074498bac0d39b45c207c95b6ed912c..27954b174ed928b06792c73a0e957eb853aee937 100644 (file)
--- a/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
+++ b/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
@@ -1,4 +1,4 @@
-//===-- MipsMCCodeEmitter.cpp - Convert Mips code to machine code ---------===//
+//===-- MipsMCCodeEmitter.cpp - Convert Mips Code to Machine Code ---------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -34,10 +34,12 @@ class MipsMCCodeEmitter : public MCCodeEmitter {
   const MCInstrInfo &MCII;
   const MCSubtargetInfo &STI;
   MCContext &Ctx;
+  bool IsLittleEndian;
 
 public:
   MipsMCCodeEmitter(const MCInstrInfo &mcii, const MCSubtargetInfo &sti,
-                    MCContext &ctx) : MCII(mcii), STI(sti) , Ctx(ctx) {}
+                    MCContext &ctx, bool IsLittle) :
+            MCII(mcii), STI(sti) , Ctx(ctx), IsLittleEndian(IsLittle) {}
 
   ~MipsMCCodeEmitter() {}
 
@@ -47,9 +49,9 @@ public:
 
   void EmitInstruction(uint64_t Val, unsigned Size, raw_ostream &OS) const {
     // Output the instruction encoding in little endian byte order.
-    for (unsigned i = 0; i != Size; ++i) {
-      EmitByte(Val & 255, OS);
-      Val >>= 8;
+    for (unsigned i = 0; i < Size; ++i) {
+      unsigned Shift = IsLittleEndian ? i * 8 : (Size - 1 - i) * 8;
+      EmitByte((Val >> Shift) & 0xff, OS);
     }
   }
 
@@ -58,7 +60,7 @@ public:
 
   // getBinaryCodeForInstr - TableGen'erated function for getting the
   // binary encoding for an instruction.
-  unsigned getBinaryCodeForInstr(const MCInst &MI,
+  uint64_t getBinaryCodeForInstr(const MCInst &MI,
                                  SmallVectorImpl<MCFixup> &Fixups) const;
 
   // getBranchJumpOpValue - Return binary encoding of the jump
@@ -88,11 +90,18 @@ public:
 }; // class MipsMCCodeEmitter
 }  // namespace
 
-MCCodeEmitter *llvm::createMipsMCCodeEmitter(const MCInstrInfo &MCII,
-                                             const MCSubtargetInfo &STI,
-                                             MCContext &Ctx)
+MCCodeEmitter *llvm::createMipsMCCodeEmitterEB(const MCInstrInfo &MCII,
+                                               const MCSubtargetInfo &STI,
+                                               MCContext &Ctx)
 {
-  return new MipsMCCodeEmitter(MCII, STI, Ctx);
+  return new MipsMCCodeEmitter(MCII, STI, Ctx, false);
+}
+
+MCCodeEmitter *llvm::createMipsMCCodeEmitterEL(const MCInstrInfo &MCII,
+                                               const MCSubtargetInfo &STI,
+                                               MCContext &Ctx)
+{
+  return new MipsMCCodeEmitter(MCII, STI, Ctx, true);
 }
 
 /// EncodeInstruction - Emit the instruction.
@@ -170,73 +179,71 @@ getMachineOpValue(const MCInst &MI, const MCOperand &MO,
   } else if (MO.isFPImm()) {
     return static_cast<unsigned>(APFloat(MO.getFPImm())
         .bitcastToAPInt().getHiBits(32).getLimitedValue());
-  } else if (MO.isExpr()) {
-    const MCExpr *Expr = MO.getExpr();
-    MCExpr::ExprKind Kind = Expr->getKind();
-    unsigned Ret = 0;
-
-    if (Kind == MCExpr::Binary) {
-      const MCBinaryExpr *BE = static_cast<const MCBinaryExpr*>(Expr);
-      Expr = BE->getLHS();
-      Kind = Expr->getKind();
-      const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(BE->getRHS());
-      assert((Kind == MCExpr::SymbolRef) && CE &&
-             "Binary expression must be sym+const.");
-      Ret = CE->getValue();
-    }
+  } 
+
+  // MO must be an Expr.
+  assert(MO.isExpr());
 
-    if (Kind == MCExpr::SymbolRef) {
-      Mips::Fixups FixupKind;
-
-      switch(cast<MCSymbolRefExpr>(Expr)->getKind()) {
-      case MCSymbolRefExpr::VK_Mips_GPREL:
-        FixupKind = Mips::fixup_Mips_GPREL16;
-        break;
-      case MCSymbolRefExpr::VK_Mips_GOT_CALL:
-        FixupKind = Mips::fixup_Mips_CALL16;
-        break;
-      case MCSymbolRefExpr::VK_Mips_GOT16:
-        FixupKind = Mips::fixup_Mips_GOT_Global;
-        break;
-      case MCSymbolRefExpr::VK_Mips_GOT:
-        FixupKind = Mips::fixup_Mips_GOT_Local;
-        break;
-      case MCSymbolRefExpr::VK_Mips_ABS_HI:
-        FixupKind = Mips::fixup_Mips_HI16;
-        break;
-      case MCSymbolRefExpr::VK_Mips_ABS_LO:
-        FixupKind = Mips::fixup_Mips_LO16;
-        break;
-      case MCSymbolRefExpr::VK_Mips_TLSGD:
-        FixupKind = Mips::fixup_Mips_TLSGD;
-        break;
-      case MCSymbolRefExpr::VK_Mips_TLSLDM:
-        FixupKind = Mips::fixup_Mips_TLSLDM;
-        break;
-      case MCSymbolRefExpr::VK_Mips_DTPREL_HI:
-        FixupKind = Mips::fixup_Mips_DTPREL_HI;
-        break;
-      case MCSymbolRefExpr::VK_Mips_DTPREL_LO:
-        FixupKind = Mips::fixup_Mips_DTPREL_LO;
-        break;
-      case MCSymbolRefExpr::VK_Mips_GOTTPREL:
-        FixupKind = Mips::fixup_Mips_GOTTPREL;
-        break;
-      case MCSymbolRefExpr::VK_Mips_TPREL_HI:
-        FixupKind = Mips::fixup_Mips_TPREL_HI;
-        break;
-      case MCSymbolRefExpr::VK_Mips_TPREL_LO:
-        FixupKind = Mips::fixup_Mips_TPREL_LO;
-        break;
-      default:
-        return Ret;
-      } // switch
-      Fixups.push_back(MCFixup::Create(0, Expr, MCFixupKind(FixupKind)));
-    } // if SymbolRef
-    // All of the information is in the fixup.
-    return Ret;
+  const MCExpr *Expr = MO.getExpr();
+  MCExpr::ExprKind Kind = Expr->getKind();
+
+  if (Kind == MCExpr::Binary) {
+    Expr = static_cast<const MCBinaryExpr*>(Expr)->getLHS();
+    Kind = Expr->getKind();
   }
-  llvm_unreachable("Unable to encode MCOperand!");
+
+  assert (Kind == MCExpr::SymbolRef);
+    
+  Mips::Fixups FixupKind;
+
+  switch(cast<MCSymbolRefExpr>(Expr)->getKind()) {
+  case MCSymbolRefExpr::VK_Mips_GPREL:
+    FixupKind = Mips::fixup_Mips_GPREL16;
+    break;
+  case MCSymbolRefExpr::VK_Mips_GOT_CALL:
+    FixupKind = Mips::fixup_Mips_CALL16;
+    break;
+  case MCSymbolRefExpr::VK_Mips_GOT16:
+    FixupKind = Mips::fixup_Mips_GOT_Global;
+    break;
+  case MCSymbolRefExpr::VK_Mips_GOT:
+    FixupKind = Mips::fixup_Mips_GOT_Local;
+    break;
+  case MCSymbolRefExpr::VK_Mips_ABS_HI:
+    FixupKind = Mips::fixup_Mips_HI16;
+    break;
+  case MCSymbolRefExpr::VK_Mips_ABS_LO:
+    FixupKind = Mips::fixup_Mips_LO16;
+    break;
+  case MCSymbolRefExpr::VK_Mips_TLSGD:
+    FixupKind = Mips::fixup_Mips_TLSGD;
+    break;
+  case MCSymbolRefExpr::VK_Mips_TLSLDM:
+    FixupKind = Mips::fixup_Mips_TLSLDM;
+    break;
+  case MCSymbolRefExpr::VK_Mips_DTPREL_HI:
+    FixupKind = Mips::fixup_Mips_DTPREL_HI;
+    break;
+  case MCSymbolRefExpr::VK_Mips_DTPREL_LO:
+    FixupKind = Mips::fixup_Mips_DTPREL_LO;
+    break;
+  case MCSymbolRefExpr::VK_Mips_GOTTPREL:
+    FixupKind = Mips::fixup_Mips_GOTTPREL;
+    break;
+  case MCSymbolRefExpr::VK_Mips_TPREL_HI:
+    FixupKind = Mips::fixup_Mips_TPREL_HI;
+    break;
+  case MCSymbolRefExpr::VK_Mips_TPREL_LO:
+    FixupKind = Mips::fixup_Mips_TPREL_LO;
+    break;
+  default:
+    break;
+  } // switch
+
+  Fixups.push_back(MCFixup::Create(0, MO.getExpr(), MCFixupKind(FixupKind)));
+
+  // All of the information is in the fixup.
+  return 0;
 }
 
 /// getMemEncoding - Return binary encoding of memory related operand.