From f1661baf30faf76dbad7d23aeac0c3dbe4dd045c Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Mon, 16 Oct 2006 15:56:46 -0400
Subject: Fix up microcode support.

src/arch/sparc/isa/formats/blockmem.isa:
    Several small and medium bug fixes.
src/cpu/simple/base.cc:
    Fixed a few compiler errors and made sure the next micro pc is set to 1 to prevent the first microop from executing twice. Also fixed a fetching bug.
src/cpu/thread_state.cc:
    Made sure the microPC and nextMicroPC are initialized properly.

--HG--
extra : convert_revision : a0fc8aa18d1ade916f17c557181a793c6108a8af
---
 src/cpu/simple/base.cc  | 12 +++++++-----
 src/cpu/thread_state.cc |  4 ++--
 2 files changed, 9 insertions(+), 7 deletions(-)

(limited to 'src/cpu')

diff --git a/src/cpu/simple/base.cc b/src/cpu/simple/base.cc
index 1d5c0a6f5..769e400df 100644
--- a/src/cpu/simple/base.cc
+++ b/src/cpu/simple/base.cc
@@ -402,10 +402,12 @@ BaseSimpleCPU::preExecute()
         if (instPtr->isMacroOp()) {
             curMacroStaticInst = instPtr;
             curStaticInst = curMacroStaticInst->fetchMicroOp(0);
+        } else {
+            curStaticInst = instPtr;
         }
     } else {
         //Read the next micro op from the macro op
-        curStaticInst = curMacroStaticInst->fetchMicroOp(thread->readMicroPc());
+        curStaticInst = curMacroStaticInst->fetchMicroOp(thread->readMicroPC());
     }
 
 
@@ -464,17 +466,17 @@ BaseSimpleCPU::advancePC(Fault fault)
             assert(curMacroStaticInst);
             //Close out this macro op, and clean up the
             //microcode state
-            curMacroStaticInst = nullStaticInst;
+            curMacroStaticInst = StaticInst::nullStaticInstPtr;
             thread->setMicroPC(0);
-            thread->setNextMicroPC(0);
+            thread->setNextMicroPC(1);
         }
         //If we're still in a macro op
         if (curMacroStaticInst) {
             //Advance the micro pc
-            thread->setMicroPC(thread->getNextMicroPC());
+            thread->setMicroPC(thread->readNextMicroPC());
             //Advance the "next" micro pc. Note that there are no delay
             //slots, and micro ops are "word" addressed.
-            thread->setNextMicroPC(thread->getNextMicroPC() + 1);
+            thread->setNextMicroPC(thread->readNextMicroPC() + 1);
         } else {
             // go to the next instruction
             thread->setPC(thread->readNextPC());
diff --git a/src/cpu/thread_state.cc b/src/cpu/thread_state.cc
index 6a96560f1..c644ae8d7 100644
--- a/src/cpu/thread_state.cc
+++ b/src/cpu/thread_state.cc
@@ -42,13 +42,13 @@
 ThreadState::ThreadState(int _cpuId, int _tid)
     : cpuId(_cpuId), tid(_tid), lastActivate(0), lastSuspend(0),
       profile(NULL), profileNode(NULL), profilePC(0), quiesceEvent(NULL),
-      funcExeInst(0), storeCondFailures(0)
+      microPC(0), nextMicroPC(1), funcExeInst(0), storeCondFailures(0)
 #else
 ThreadState::ThreadState(int _cpuId, int _tid, Process *_process,
                          short _asid, MemObject *mem)
     : cpuId(_cpuId), tid(_tid), lastActivate(0), lastSuspend(0),
       process(_process), asid(_asid),
-      funcExeInst(0), storeCondFailures(0)
+      microPC(0), nextMicroPC(1), funcExeInst(0), storeCondFailures(0)
 #endif
 {
     numInst = 0;
-- 
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