Clock: Make Tick unsigned and remove UTick

This patch makes the Tick unsigned and removes the UTick typedef. The
ticks should never be negative, and there was only one major issue
with removing it, caused by the o3 CPU using a -1 as an initial value.

The patch has no impact on any regressions.

1 files changed, 2 insertions, 6 deletions

diff --git a/src/sim/eventq.hh b/src/sim/eventq.hh
index 09483f4e2..c46902889 100644
--- a/src/sim/eventq.hh
+++ b/src/sim/eventq.hh
@@ -481,9 +481,7 @@ class EventManager
 inline void
 EventQueue::schedule(Event *event, Tick when)
 {
-    // Typecasting Tick->Utick here since gcc
-    // complains about signed overflow
-    assert((UTick)when >= (UTick)curTick());
+    assert(when >= curTick());
     assert(!event->scheduled());
     assert(event->initialized());
 
@@ -520,9 +518,7 @@ EventQueue::deschedule(Event *event)
 inline void
 EventQueue::reschedule(Event *event, Tick when, bool always)
 {
-    // Typecasting Tick->Utick here since gcc
-    // complains about signed overflow
-    assert((UTick)when >= (UTick)curTick());
+    assert(when >= curTick());
     assert(always || event->scheduled());
     assert(event->initialized());