cpu: o3: replace issueLatency with bool pipelined

Currently, each op class has a parameter issueLat that denotes the cycles after
which another op of the same class can be issued.  As of now, this latency can
either be one cycle (fully pipelined) or same as execution latency of the op
(not at all pipelined).  The fact that issueLat is a parameter of type Cycles
makes one believe that it can be set to any value.  To avoid the confusion, the
parameter is being renamed as 'pipelined' with type boolean.  If set to true,
the op would execute in a fully pipelined fashion. Otherwise, it would execute
in an unpipelined fashion.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/cpu/FuncUnit.py b/src/cpu/FuncUnit.py
index 0bb23e876..d4493ecf2 100644
--- a/src/cpu/FuncUnit.py
+++ b/src/cpu/FuncUnit.py
@@ -54,9 +54,10 @@ class OpClass(Enum):
 class OpDesc(SimObject):
     type = 'OpDesc'
     cxx_header = "cpu/func_unit.hh"
-    issueLat = Param.Cycles(1, "cycles until another can be issued")
     opClass = Param.OpClass("type of operation")
     opLat = Param.Cycles(1, "cycles until result is available")
+    pipelined = Param.Bool(True, "set to true when the functional unit for"
+        "this op is fully pipelined. False means not pipelined at all.")
 
 class FUDesc(SimObject):
     type = 'FUDesc'