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authorGabe Black <gblack@eecs.umich.edu>2007-08-13 16:11:27 -0700
committerGabe Black <gblack@eecs.umich.edu>2007-08-13 16:11:27 -0700
commitca84d953b90172e2a642c0d777339c5328345801 (patch)
tree822d5e4ca48b1898a77c570f49623a8319970110
parent92a57edff1e6d71c51af7e8e79bbe89f1e46b69a (diff)
downloadgem5-ca84d953b90172e2a642c0d777339c5328345801.tar.xz
SPARC: Make nops have the IsNop flag set.
In O3, a nop is used to carry faults down the pipeline that didn't originate from an instruction. If the instruction doesn't do anything, that is just returns NoFault, but doesn't have IsNop set, the NoFault will overwrite the fault that's being sent down and nothing will happen. --HG-- extra : convert_revision : 54d99002b550ca0e1cf14603f588dc1038e3e535
-rw-r--r--src/arch/sparc/isa/formats/nop.isa3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/arch/sparc/isa/formats/nop.isa b/src/arch/sparc/isa/formats/nop.isa
index de2ba2f54..63c541288 100644
--- a/src/arch/sparc/isa/formats/nop.isa
+++ b/src/arch/sparc/isa/formats/nop.isa
@@ -1,4 +1,4 @@
-// Copyright (c) 2006 The Regents of The University of Michigan
+// Copyright (c) 2006-2007 The Regents of The University of Michigan
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
@@ -53,6 +53,7 @@ output header {{
Nop(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
SparcStaticInst(mnem, _machInst, __opClass)
{
+ flags[IsNop] = true;
}
// All Nop instructions do the same thing, so this can be