Support for microMIPS TLS relocations.

[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 79818ec0bfbc7baa2317626a30bb3411fd94c5ec..06e8dd82f6f9a2ab0f4a12384a43bb05e1de7f5f 100644 (file)
--- a/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
+++ b/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
@@ -107,6 +107,9 @@ public:
   unsigned getMachineOpValue(const MCInst &MI,const MCOperand &MO,
                              SmallVectorImpl<MCFixup> &Fixups) const;
 
+  unsigned getMSAMemEncoding(const MCInst &MI, unsigned OpNo,
+                             SmallVectorImpl<MCFixup> &Fixups) const;
+
   unsigned getMemEncoding(const MCInst &MI, unsigned OpNo,
                           SmallVectorImpl<MCFixup> &Fixups) const;
   unsigned getMemEncodingMMImm12(const MCInst &MI, unsigned OpNo,
@@ -116,6 +119,10 @@ public:
   unsigned getSizeInsEncoding(const MCInst &MI, unsigned OpNo,
                               SmallVectorImpl<MCFixup> &Fixups) const;
 
+  // getLSAImmEncoding - Return binary encoding of LSA immediate.
+  unsigned getLSAImmEncoding(const MCInst &MI, unsigned OpNo,
+                             SmallVectorImpl<MCFixup> &Fixups) const;
+
   unsigned
   getExprOpValue(const MCExpr *Expr,SmallVectorImpl<MCFixup> &Fixups) const;
 
@@ -406,10 +413,12 @@ getExprOpValue(const MCExpr *Expr,SmallVectorImpl<MCFixup> &Fixups) const {
                             : Mips::fixup_Mips_LO16;
     break;
   case MCSymbolRefExpr::VK_Mips_TLSGD:
-    FixupKind = Mips::fixup_Mips_TLSGD;
+    FixupKind = IsMicroMips ? Mips::fixup_MICROMIPS_TLS_GD
+                            : Mips::fixup_Mips_TLSGD;
     break;
   case MCSymbolRefExpr::VK_Mips_TLSLDM:
-    FixupKind = Mips::fixup_Mips_TLSLDM;
+    FixupKind = IsMicroMips ? Mips::fixup_MICROMIPS_TLS_LDM
+                            : Mips::fixup_Mips_TLSLDM;
     break;
   case MCSymbolRefExpr::VK_Mips_DTPREL_HI:
     FixupKind = IsMicroMips ? Mips::fixup_MICROMIPS_TLS_DTPREL_HI16
@@ -476,6 +485,49 @@ getMachineOpValue(const MCInst &MI, const MCOperand &MO,
   return getExprOpValue(MO.getExpr(),Fixups);
 }
 
+/// getMSAMemEncoding - Return binary encoding of memory operand for LD/ST
+/// instructions.
+unsigned
+MipsMCCodeEmitter::getMSAMemEncoding(const MCInst &MI, unsigned OpNo,
+                                     SmallVectorImpl<MCFixup> &Fixups) const {
+  // Base register is encoded in bits 20-16, offset is encoded in bits 15-0.
+  assert(MI.getOperand(OpNo).isReg());
+  unsigned RegBits = getMachineOpValue(MI, MI.getOperand(OpNo),Fixups) << 16;
+  unsigned OffBits = getMachineOpValue(MI, MI.getOperand(OpNo+1), Fixups);
+
+  // The immediate field of an LD/ST instruction is scaled which means it must
+  // be divided (when encoding) by the size (in bytes) of the instructions'
+  // data format.
+  // .b - 1 byte
+  // .h - 2 bytes
+  // .w - 4 bytes
+  // .d - 8 bytes
+  switch(MI.getOpcode())
+  {
+  default:
+    assert (0 && "Unexpected instruction");
+    break;
+  case Mips::LD_B:
+  case Mips::ST_B:
+    // We don't need to scale the offset in this case
+    break;
+  case Mips::LD_H:
+  case Mips::ST_H:
+    OffBits >>= 1;
+    break;
+  case Mips::LD_W:
+  case Mips::ST_W:
+    OffBits >>= 2;
+    break;
+  case Mips::LD_D:
+  case Mips::ST_D:
+    OffBits >>= 3;
+    break;
+  }
+
+  return (OffBits & 0xFFFF) | RegBits;
+}
+
 /// getMemEncoding - Return binary encoding of memory related operand.
 /// If the offset operand requires relocation, record the relocation.
 unsigned
@@ -521,5 +573,13 @@ MipsMCCodeEmitter::getSizeInsEncoding(const MCInst &MI, unsigned OpNo,
   return Position + Size - 1;
 }
 
+unsigned
+MipsMCCodeEmitter::getLSAImmEncoding(const MCInst &MI, unsigned OpNo,
+                                     SmallVectorImpl<MCFixup> &Fixups) const {
+  assert(MI.getOperand(OpNo).isImm());
+  // The immediate is encoded as 'immediate - 1'.
+  return getMachineOpValue(MI, MI.getOperand(OpNo), Fixups) - 1;
+}
+
 #include "MipsGenMCCodeEmitter.inc"