From: Gabe Black <gblack@eecs.umich.edu>
Date: Thu, 28 Dec 2006 19:32:41 +0000 (-0500)
Subject: Some fixes for decode stage branches without delay slots. This will need some work... 
X-Git-Tag: m5_2.0_beta3~258
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d24f60788faa10f4a937288fd301158c1620318b;p=gem5.git

Some fixes for decode stage branches without delay slots. This will need some work to be compatible with delay slots too. Also changed some direct variable uses to use an accessor function.

--HG--
extra : convert_revision : b291292600e9d3e7e4a8255daf54342b736c7e35
---

diff --git a/src/cpu/o3/decode_impl.hh b/src/cpu/o3/decode_impl.hh
index aea56cc27..bfb2cd6dc 100644
--- a/src/cpu/o3/decode_impl.hh
+++ b/src/cpu/o3/decode_impl.hh
@@ -282,6 +282,10 @@ DefaultDecode<Impl>::squash(DynInstPtr &inst, unsigned tid)
     toFetch->decodeInfo[tid].doneSeqNum = inst->seqNum;
     toFetch->decodeInfo[tid].squash = true;
     toFetch->decodeInfo[tid].nextPC = inst->branchTarget();
+    ///FIXME There needs to be a way to set the nextPC and nextNPC
+    ///explicitly for ISAs with delay slots.
+    toFetch->decodeInfo[tid].nextNPC =
+        inst->branchTarget() + sizeof(TheISA::MachInst);
 #if ISA_HAS_DELAY_SLOT
     toFetch->decodeInfo[tid].branchTaken = inst->readNextNPC() !=
         (inst->readNextPC() + sizeof(TheISA::MachInst));
@@ -742,8 +746,8 @@ DefaultDecode<Impl>::decodeInsts(unsigned tid)
         // Ensure that if it was predicted as a branch, it really is a
         // branch.
         if (inst->readPredTaken() && !inst->isControl()) {
-            DPRINTF(Decode, "PredPC : %#x != NextPC: %#x\n",inst->predPC,
-                    inst->nextPC + 4);
+            DPRINTF(Decode, "PredPC : %#x != NextPC: %#x\n",
+                    inst->readPredPC(), inst->readNextPC() + 4);
 
             panic("Instruction predicted as a branch!");