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, 3 deletions

diff --git a/src/cpu/o3/inst_queue_impl.hh b/src/cpu/o3/inst_queue_impl.hh
index fa621ffbf..7d359b992 100644
--- a/src/cpu/o3/inst_queue_impl.hh
+++ b/src/cpu/o3/inst_queue_impl.hh
@@ -825,7 +825,7 @@ InstructionQueue<Impl>::scheduleReadyInsts()
                 if (idx >= 0)
                     fuPool->freeUnitNextCycle(idx);
             } else {
-                Cycles issue_latency = fuPool->getIssueLatency(op_class);
+                bool pipelined = fuPool->isPipelined(op_class);
                 // Generate completion event for the FU
                 ++wbOutstanding;
                 FUCompletion *execution = new FUCompletion(issuing_inst,
@@ -834,8 +834,7 @@ InstructionQueue<Impl>::scheduleReadyInsts()
                 cpu->schedule(execution,
                               cpu->clockEdge(Cycles(op_latency - 1)));
 
-                // @todo: Enforce that issue_latency == 1 or op_latency
-                if (issue_latency > Cycles(1)) {
+                if (!pipelined) {
                     // If FU isn't pipelined, then it must be freed
                     // upon the execution completing.
                     execution->setFreeFU();