This can be used whenever generic code needs a filler instruction that
doesn't do anything.
Change-Id: Ib245d3e880a951e229eb315a09ecc7c47e6ae00f
Reviewed-on: https://gem5-review.googlesource.com/6823
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
#include "sim/core.hh"
+namespace {
+
+static TheISA::ExtMachInst nopMachInst;
+
+class NopStaticInst : public StaticInst
+{
+ public:
+ NopStaticInst() : StaticInst("gem5 nop", nopMachInst, No_OpClass)
+ {}
+
+ Fault
+ execute(ExecContext *xc, Trace::InstRecord *traceData) const override
+ {
+ return NoFault;
+ }
+
+ void
+ advancePC(TheISA::PCState &pcState) const override
+ {
+ pcState.advance();
+ }
+
+ std::string
+ generateDisassembly(Addr pc, const SymbolTable *symtab) const override
+ {
+ return mnemonic;
+ }
+
+ private:
+};
+
+}
+
StaticInstPtr StaticInst::nullStaticInstPtr;
+StaticInstPtr StaticInst::nopStaticInstPtr = new NopStaticInst;
using namespace std;
/// Pointer to a statically allocated "null" instruction object.
static StaticInstPtr nullStaticInstPtr;
+ /// Pointer to a statically allocated generic "nop" instruction object.
+ static StaticInstPtr nopStaticInstPtr;
+
/// The binary machine instruction.
const ExtMachInst machInst;