let Inst{11-4} = 0b00001001;
let Inst{3-0} = Rt2;
+ let Unpredictable{11-8} = 0b1111;
let DecoderMethod = "DecodeSwap";
}
// SWP/SWPB are deprecated in V6/V7.
let mayLoad = 1, mayStore = 1 in {
-def SWP : AIswp<0, (outs GPR:$Rt), (ins GPR:$Rt2, addr_offset_none:$addr),
+def SWP : AIswp<0, (outs GPRnopc:$Rt), (ins GPRnopc:$Rt2, addr_offset_none:$addr),
"swp", []>;
-def SWPB: AIswp<1, (outs GPR:$Rt), (ins GPR:$Rt2, addr_offset_none:$addr),
+def SWPB: AIswp<1, (outs GPRnopc:$Rt), (ins GPRnopc:$Rt2, addr_offset_none:$addr),
"swpb", []>;
}
return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
DecodeStatus S = MCDisassembler::Success;
+
+ if (Rt == Rn || Rn == Rt2)
+ S = MCDisassembler::SoftFail;
+
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler::Fail;
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
--- /dev/null
+# RUN: llvm-mc --disassemble %s -triple=armv7-linux-gnueabi |& FileCheck %s
+
+# CHECK: potentially undefined
+# CHECK: 0x9f 0x10 0x03 0x01
+0x9f 0x10 0x03 0x01
+
+# CHECK: potentially undefined
+# CHECK: 0x90 0xf0 0x03 0x01
+0x90 0xf0 0x03 0x01
+
+# CHECK: potentially undefined
+# CHECK: 0x90 0x1f 0x03 0x01
+0x90 0x1f 0x03 0x01
+
+# CHECK: potentially undefined
+# CHECK: 0x90 0x10 0x0f 0x01
+0x90 0x10 0x0f 0x01
+
+# CHECK: potentially undefined
+# CHECK: 0x90 0x10 0x01 0x01
+0x90 0x10 0x01 0x01
+
+# CHECK: potentially undefined
+# CHECK: 0x90 0x10 0x00 0x01
+0x90 0x10 0x00 0x01
+