Thumb2 assembly parsing and encoding for LDRBT.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139267 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
index bb9debd..2857b2d 100644
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -123,6 +123,16 @@
}
+// t2addrmode_posimm8 := reg + imm8
+def MemPosImm8OffsetAsmOperand : AsmOperandClass {let Name="MemPosImm8Offset";}
+def t2addrmode_posimm8 : Operand<i32> {
+ let PrintMethod = "printT2AddrModeImm8Operand";
+ let EncoderMethod = "getT2AddrModeImm8OpValue";
+ let DecoderMethod = "DecodeT2AddrModeImm8";
+ let ParserMatchClass = MemPosImm8OffsetAsmOperand;
+ let MIOperandInfo = (ops GPR:$base, i32imm:$offsimm);
+}
+
// t2addrmode_negimm8 := reg - imm8
def MemNegImm8OffsetAsmOperand : AsmOperandClass {let Name="MemNegImm8Offset";}
def t2addrmode_negimm8 : Operand<i32>,
@@ -1291,26 +1301,24 @@
[]>;
} // mayLoad = 1, neverHasSideEffects = 1
-// LDRT, LDRBT, LDRHT, LDRSBT, LDRSHT all have offset mode (PUW=0b110) and are
-// for disassembly only.
+// LDRT, LDRBT, LDRHT, LDRSBT, LDRSHT all have offset mode (PUW=0b110).
// Ref: A8.6.57 LDR (immediate, Thumb) Encoding T4
class T2IldT<bit signed, bits<2> type, string opc, InstrItinClass ii>
- : T2Ii8<(outs rGPR:$Rt), (ins t2addrmode_imm8:$addr), ii, opc,
+ : T2Ii8<(outs rGPR:$Rt), (ins t2addrmode_posimm8:$addr), ii, opc,
"\t$Rt, $addr", []> {
+ bits<4> Rt;
+ bits<13> addr;
let Inst{31-27} = 0b11111;
let Inst{26-25} = 0b00;
let Inst{24} = signed;
let Inst{23} = 0;
let Inst{22-21} = type;
let Inst{20} = 1; // load
+ let Inst{19-16} = addr{12-9};
+ let Inst{15-12} = Rt;
let Inst{11} = 1;
let Inst{10-8} = 0b110; // PUW.
-
- bits<4> Rt;
- bits<13> addr;
- let Inst{15-12} = Rt;
- let Inst{19-16} = addr{12-9};
- let Inst{7-0} = addr{7-0};
+ let Inst{7-0} = addr{7-0};
}
def t2LDRT : T2IldT<0, 0b10, "ldrt", IIC_iLoad_i>;
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index 6df2d56..b66adfc 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -742,6 +742,14 @@
int64_t Val = Mem.OffsetImm->getValue();
return Val > -256 && Val < 256;
}
+ bool isMemPosImm8Offset() const {
+ if (Kind != Memory || Mem.OffsetRegNum != 0)
+ return false;
+ // Immediate offset in range [0, 255].
+ if (!Mem.OffsetImm) return true;
+ int64_t Val = Mem.OffsetImm->getValue();
+ return Val >= 0 && Val < 256;
+ }
bool isMemNegImm8Offset() const {
if (Kind != Memory || Mem.OffsetRegNum != 0)
return false;
@@ -1108,11 +1116,12 @@
Inst.addOperand(MCOperand::CreateImm(Val));
}
+ void addMemPosImm8OffsetOperands(MCInst &Inst, unsigned N) const {
+ addMemImm8OffsetOperands(Inst, N);
+ }
+
void addMemNegImm8OffsetOperands(MCInst &Inst, unsigned N) const {
- assert(N == 2 && "Invalid number of operands!");
- int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
- Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
- Inst.addOperand(MCOperand::CreateImm(Val));
+ addMemImm8OffsetOperands(Inst, N);
}
void addMemUImm12OffsetOperands(MCInst &Inst, unsigned N) const {