1 files changed, 127 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/X86/AsmPrinter/X86ATTInstPrinter.cpp b/contrib/llvm/lib/Target/X86/AsmPrinter/X86ATTInstPrinter.cpp
new file mode 100644
index 0000000..0b64cb4
--- /dev/null
+++ b/contrib/llvm/lib/Target/X86/AsmPrinter/X86ATTInstPrinter.cpp
@@ -0,0 +1,127 @@
+//===-- X86ATTInstPrinter.cpp - AT&T assembly instruction printing --------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file includes code for rendering MCInst instances as AT&T-style
+// assembly.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "asm-printer"
+#include "X86ATTInstPrinter.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/FormattedStream.h"
+#include "X86GenInstrNames.inc"
+using namespace llvm;
+
+// Include the auto-generated portion of the assembly writer.
+#define MachineInstr MCInst
+#define GET_INSTRUCTION_NAME
+#include "X86GenAsmWriter.inc"
+#undef MachineInstr
+
+void X86ATTInstPrinter::printInst(const MCInst *MI, raw_ostream &OS) {
+  printInstruction(MI, OS);
+}
+StringRef X86ATTInstPrinter::getOpcodeName(unsigned Opcode) const {
+  return getInstructionName(Opcode);
+}
+
+
+void X86ATTInstPrinter::printSSECC(const MCInst *MI, unsigned Op,
+                                   raw_ostream &O) {
+  switch (MI->getOperand(Op).getImm()) {
+  default: assert(0 && "Invalid ssecc argument!");
+  case 0: O << "eq"; break;
+  case 1: O << "lt"; break;
+  case 2: O << "le"; break;
+  case 3: O << "unord"; break;
+  case 4: O << "neq"; break;
+  case 5: O << "nlt"; break;
+  case 6: O << "nle"; break;
+  case 7: O << "ord"; break;
+  }
+}
+
+/// print_pcrel_imm - This is used to print an immediate value that ends up
+/// being encoded as a pc-relative value (e.g. for jumps and calls).  These
+/// print slightly differently than normal immediates.  For example, a $ is not
+/// emitted.
+void X86ATTInstPrinter::print_pcrel_imm(const MCInst *MI, unsigned OpNo,
+                                        raw_ostream &O) {
+  const MCOperand &Op = MI->getOperand(OpNo);
+  if (Op.isImm())
+    // Print this as a signed 32-bit value.
+    O << (int)Op.getImm();
+  else {
+    assert(Op.isExpr() && "unknown pcrel immediate operand");
+    O << *Op.getExpr();
+  }
+}
+
+void X86ATTInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
+                                     raw_ostream &O) {
+  const MCOperand &Op = MI->getOperand(OpNo);
+  if (Op.isReg()) {
+    O << '%' << getRegisterName(Op.getReg());
+  } else if (Op.isImm()) {
+    O << '$' << Op.getImm();
+    
+    if (CommentStream && (Op.getImm() > 255 || Op.getImm() < -256))
+      *CommentStream << format("imm = 0x%llX\n", (long long)Op.getImm());
+    
+  } else {
+    assert(Op.isExpr() && "unknown operand kind in printOperand");
+    O << '$' << *Op.getExpr();
+  }
+}
+
+void X86ATTInstPrinter::printLeaMemReference(const MCInst *MI, unsigned Op,
+                                             raw_ostream &O) {
+  const MCOperand &BaseReg  = MI->getOperand(Op);
+  const MCOperand &IndexReg = MI->getOperand(Op+2);
+  const MCOperand &DispSpec = MI->getOperand(Op+3);
+  
+  if (DispSpec.isImm()) {
+    int64_t DispVal = DispSpec.getImm();
+    if (DispVal || (!IndexReg.getReg() && !BaseReg.getReg()))
+      O << DispVal;
+  } else {
+    assert(DispSpec.isExpr() && "non-immediate displacement for LEA?");
+    O << *DispSpec.getExpr();
+  }
+  
+  if (IndexReg.getReg() || BaseReg.getReg()) {
+    O << '(';
+    if (BaseReg.getReg())
+      printOperand(MI, Op, O);
+    
+    if (IndexReg.getReg()) {
+      O << ',';
+      printOperand(MI, Op+2, O);
+      unsigned ScaleVal = MI->getOperand(Op+1).getImm();
+      if (ScaleVal != 1)
+        O << ',' << ScaleVal;
+    }
+    O << ')';
+  }
+}
+
+void X86ATTInstPrinter::printMemReference(const MCInst *MI, unsigned Op,
+                                          raw_ostream &O) {
+  // If this has a segment register, print it.
+  if (MI->getOperand(Op+4).getReg()) {
+    printOperand(MI, Op+4, O);
+    O << ':';
+  }
+  printLeaMemReference(MI, Op, O);
+}