ARM: Fix RFE macrop.

This changes the RFE macroop into 3 microops:

URa = [sp]; URb = [sp+4]; // load CPSR,PC values from stack
sp = sp + offset;         // optionally auto-increment
PC = URa; CPSR = URb;     // write to the PC and CPSR.

Importantly:
- writing to PC is handled in the last micro-op.
- loading occurs prior to state changes.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/arch/arm/insts/macromem.cc b/src/arch/arm/insts/macromem.cc
index 2a45cf2e6..c03b7ccc1 100644
--- a/src/arch/arm/insts/macromem.cc
+++ b/src/arch/arm/insts/macromem.cc
@@ -896,6 +896,15 @@ MicroIntImmOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
 }
 
 std::string
+MicroSetPCCPSR::generateDisassembly(Addr pc, const SymbolTable *symtab) const
+{
+    std::stringstream ss;
+    printMnemonic(ss);
+    ss << "[PC,CPSR]";
+    return ss.str();
+}
+
+std::string
 MicroIntMov::generateDisassembly(Addr pc, const SymbolTable *symtab) const
 {
     std::stringstream ss;