Added RFE for disassembly only.

B6.1.8 RFE Return From Exception loads the PC and the CPSR from the word at the
specified address and the following word respectively.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96519 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index 5b06bea0e5ec68ddab63429c9559be2645eba634..d1793d099c021750c04bcb691cc91f52d17a22b2 100644 (file)
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -957,7 +957,7 @@ def SVC : ABI<0b1111, (outs), (ins i32imm:$svc), IIC_Br, "svc", "\t$svc",
               [/* For disassembly only; pattern left blank */]>;
 }
 
-// Store Return State -- for disassembly only
+// Store Return State is a system instruction -- for disassembly only
 def SRSW : ABXI<{1,0,0,?}, (outs), (ins addrmode4:$addr, i32imm:$mode),
                 NoItinerary, "srs${addr:submode}\tsp!, $mode",
                 [/* For disassembly only; pattern left blank */]> {
@@ -972,6 +972,21 @@ def SRS  : ABXI<{1,0,0,?}, (outs), (ins addrmode4:$addr, i32imm:$mode),
   let Inst{22-20} = 0b100; // W = 0
 }
 
+// Return From Exception is a system instruction -- for disassembly only
+def RFEW : ABXI<{1,0,0,?}, (outs), (ins addrmode4:$addr, GPR:$base),
+                NoItinerary, "rfe${addr:submode}\t$base!",
+                [/* For disassembly only; pattern left blank */]> {
+  let Inst{31-28} = 0b1111;
+  let Inst{22-20} = 0b011; // W = 1
+}
+
+def RFE  : ABXI<{1,0,0,?}, (outs), (ins addrmode4:$addr, GPR:$base),
+                NoItinerary, "rfe${addr:submode}\t$base",
+                [/* For disassembly only; pattern left blank */]> {
+  let Inst{31-28} = 0b1111;
+  let Inst{22-20} = 0b001; // W = 0
+}
+
 //===----------------------------------------------------------------------===//
 //  Load / store Instructions.
 //