[llvm-commits] [llvm] r154628 - in /llvm/trunk/lib/Target/ARM: ARMInstrThumb2.td Disassembler/ARMDisassembler.cpp

[Kevin Enderby]

Author: enderby
Date: Thu Apr 12 18:13:34 2012
New Revision: 154628

URL: http://llvm.org/viewvc/llvm-project?rev=154628&view=rev
Log:
Fix a few more places in the ARM disassembler so that branches get
symbolic operands added when using the C disassembler API.

Modified:
    llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td
    llvm/trunk/lib/Target/ARM/Disassembler/ARMDisassembler.cpp

Modified: llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td?rev=154628&r1=154627&r2=154628&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td (original)
+++ llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td Thu Apr 12 18:13:34 2012
@@ -3197,6 +3197,7 @@
   let Inst{13} = target{17};
   let Inst{21-16} = target{16-11};
   let Inst{10-0} = target{10-0};
+  let DecoderMethod = "DecodeT2BInstruction";
 }
 
 let isNotDuplicable = 1, isIndirectBranch = 1 in {

Modified: llvm/trunk/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/Disassembler/ARMDisassembler.cpp?rev=154628&r1=154627&r2=154628&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/Disassembler/ARMDisassembler.cpp (original)
+++ llvm/trunk/lib/Target/ARM/Disassembler/ARMDisassembler.cpp Thu Apr 12 18:13:34 2012
@@ -181,6 +181,8 @@
                                uint64_t Address, const void *Decoder);
 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
                                uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
+                               uint64_t Address, const void *Decoder);
 static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn,
                                uint64_t Address, const void *Decoder);
 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
@@ -2030,6 +2032,21 @@
 }
 
 static DecodeStatus
+DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
+                     uint64_t Address, const void *Decoder) {
+  DecodeStatus S = MCDisassembler::Success;
+  unsigned imm = (fieldFromInstruction32(Insn, 0, 11) << 0) |
+                 (fieldFromInstruction32(Insn, 11, 1) << 18) |
+                 (fieldFromInstruction32(Insn, 13, 1) << 17) |
+                 (fieldFromInstruction32(Insn, 16, 6) << 11) |
+                 (fieldFromInstruction32(Insn, 26, 1) << 19);
+  if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<20>(imm<<1) + 4,
+                                true, 4, Inst, Decoder))
+    Inst.addOperand(MCOperand::CreateImm(SignExtend32<20>(imm << 1)));
+  return S;
+}
+
+static DecodeStatus
 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
                            uint64_t Address, const void *Decoder) {
   DecodeStatus S = MCDisassembler::Success;
@@ -2955,19 +2972,25 @@
 
 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
                                  uint64_t Address, const void *Decoder) {
-  Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
+  if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
+                                true, 2, Inst, Decoder))
+    Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
   return MCDisassembler::Success;
 }
 
 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
                                  uint64_t Address, const void *Decoder) {
-  Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
+  if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<22>(Val<<1) + 4,
+                                true, 4, Inst, Decoder))
+    Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
   return MCDisassembler::Success;
 }
 
 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
                                  uint64_t Address, const void *Decoder) {
-  Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
+  if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<7>(Val<<1) + 4,
+                                true, 2, Inst, Decoder))
+    Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
   return MCDisassembler::Success;
 }
 
@@ -3389,7 +3412,9 @@
 static DecodeStatus
 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
                             uint64_t Address, const void *Decoder){
-  Inst.addOperand(MCOperand::CreateImm(Val << 1));
+  if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<8>(Val<<1) + 4,
+                                true, 2, Inst, Decoder))
+    Inst.addOperand(MCOperand::CreateImm(SignExtend32<8>(Val << 1)));
   return MCDisassembler::Success;
 }