[PowerPC] Fix printing of negative offsets in call instruction dissasembly.

llvm-svn: 353865

3 files changed, 15 insertions, 2 deletions

diff --git a/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp b/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp
index 8f96951e269..9fb37c58e85 100644
--- a/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp
+++ b/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp
@@ -60,6 +60,14 @@ extern "C" void LLVMInitializePowerPCDisassembler() {
                                          createPPCLEDisassembler);
 }
 
+static DecodeStatus DecodePCRel24BranchTarget(MCInst &Inst, unsigned Imm,
+                                              uint64_t Addr,
+                                              const void *Decoder) {
+  int32_t Offset = SignExtend32<24>(Imm);
+  Inst.addOperand(MCOperand::createImm(Offset));
+  return MCDisassembler::Success;
+}
+
 // FIXME: These can be generated by TableGen from the existing register
 // encoding values!
 
diff --git a/llvm/lib/Target/PowerPC/InstPrinter/PPCInstPrinter.cpp b/llvm/lib/Target/PowerPC/InstPrinter/PPCInstPrinter.cpp
index f4fcf58cedc..49e73891bc3 100644
--- a/llvm/lib/Target/PowerPC/InstPrinter/PPCInstPrinter.cpp
+++ b/llvm/lib/Target/PowerPC/InstPrinter/PPCInstPrinter.cpp
@@ -381,8 +381,11 @@ void PPCInstPrinter::printBranchOperand(const MCInst *MI, unsigned OpNo,
 
   // Branches can take an immediate operand.  This is used by the branch
   // selection pass to print .+8, an eight byte displacement from the PC.
-  O << ".+";
-  printAbsBranchOperand(MI, OpNo, O);
+  O << ".";
+  int32_t Imm = MI->getOperand(OpNo).getImm() << 2;
+  if (Imm >= 0)
+    O << "+";
+  O << Imm;
 }
 
 void PPCInstPrinter::printAbsBranchOperand(const MCInst *MI, unsigned OpNo,
diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.td b/llvm/lib/Target/PowerPC/PPCInstrInfo.td
index 7672f8da0fc..e54292aee28 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.td
@@ -736,7 +736,9 @@ def abscondbrtarget : Operand<OtherVT> {
 def calltarget : Operand<iPTR> {
   let PrintMethod = "printBranchOperand";
   let EncoderMethod = "getDirectBrEncoding";
+  let DecoderMethod = "DecodePCRel24BranchTarget";
   let ParserMatchClass = PPCDirectBrAsmOperand;
+  let OperandType = "OPERAND_PCREL";
 }
 def abscalltarget : Operand<iPTR> {
   let PrintMethod = "printAbsBranchOperand";