1 files changed, 21 insertions, 15 deletions

diff --git a/src/arch/alpha/isa/decoder.isa b/src/arch/alpha/isa/decoder.isa
index 5bd19b677..7014d4c22 100644
--- a/src/arch/alpha/isa/decoder.isa
+++ b/src/arch/alpha/isa/decoder.isa
@@ -629,7 +629,7 @@ decode OPCODE default Unknown::unknown() {
         /* Rb is a fake dependency so here is a fun way to get
          * the parser to understand that.
          */
-                Ra = xc->readMiscRegWithEffect(AlphaISA::IPR_CC, fault) + (Rb & 0);
+                Ra = xc->readMiscRegWithEffect(AlphaISA::IPR_CC) + (Rb & 0);
 
 #else
                 Ra = curTick;
@@ -661,12 +661,12 @@ decode OPCODE default Unknown::unknown() {
 #if FULL_SYSTEM
         format BasicOperate {
             0xe000: rc({{
-                Ra = xc->readIntrFlag();
-                xc->setIntrFlag(0);
+                Ra = IntrFlag;
+                IntrFlag = 0;
             }}, IsNonSpeculative, IsUnverifiable);
             0xf000: rs({{
-                Ra = xc->readIntrFlag();
-                xc->setIntrFlag(1);
+                Ra = IntrFlag;
+                IntrFlag = 1;
             }}, IsNonSpeculative, IsUnverifiable);
         }
 #else
@@ -681,7 +681,7 @@ decode OPCODE default Unknown::unknown() {
     0x00: CallPal::call_pal({{
         if (!palValid ||
             (palPriv
-             && xc->readMiscRegWithEffect(AlphaISA::IPR_ICM, fault) != AlphaISA::mode_kernel)) {
+             && xc->readMiscRegWithEffect(AlphaISA::IPR_ICM) != AlphaISA::mode_kernel)) {
             // invalid pal function code, or attempt to do privileged
             // PAL call in non-kernel mode
             fault = new UnimplementedOpcodeFault;
@@ -693,7 +693,7 @@ decode OPCODE default Unknown::unknown() {
 
             if (dopal) {
                 xc->setMiscRegWithEffect(AlphaISA::IPR_EXC_ADDR, NPC);
-                NPC = xc->readMiscRegWithEffect(AlphaISA::IPR_PAL_BASE, fault) + palOffset;
+                NPC = xc->readMiscRegWithEffect(AlphaISA::IPR_PAL_BASE) + palOffset;
             }
         }
     }}, IsNonSpeculative);
@@ -745,7 +745,13 @@ decode OPCODE default Unknown::unknown() {
         0: OpcdecFault::hw_mfpr();
         format HwMoveIPR {
             1: hw_mfpr({{
-                Ra = xc->readMiscRegWithEffect(ipr_index, fault);
+                int miscRegIndex = (ipr_index < MaxInternalProcRegs) ?
+                        IprToMiscRegIndex[ipr_index] : -1;
+                if(miscRegIndex < 0 || !IprIsReadable(miscRegIndex) ||
+                    miscRegIndex >= NumInternalProcRegs)
+                        fault = new UnimplementedOpcodeFault;
+                else
+                    Ra = xc->readMiscRegWithEffect(miscRegIndex);
             }}, IsIprAccess);
         }
     }
@@ -754,7 +760,13 @@ decode OPCODE default Unknown::unknown() {
         0: OpcdecFault::hw_mtpr();
         format HwMoveIPR {
             1: hw_mtpr({{
-                xc->setMiscRegWithEffect(ipr_index, Ra);
+                int miscRegIndex = (ipr_index < MaxInternalProcRegs) ?
+                        IprToMiscRegIndex[ipr_index] : -1;
+                if(miscRegIndex < 0 || !IprIsWritable(miscRegIndex) ||
+                    miscRegIndex >= NumInternalProcRegs)
+                        fault = new UnimplementedOpcodeFault;
+                else
+                    xc->setMiscRegWithEffect(miscRegIndex, Ra);
                 if (traceData) { traceData->setData(Ra); }
             }}, IsIprAccess);
         }
@@ -783,12 +795,6 @@ decode OPCODE default Unknown::unknown() {
             0x04: quiesceTime({{
                 R0 = AlphaPseudo::quiesceTime(xc->tcBase());
             }}, IsNonSpeculative, IsUnverifiable);
-            0x10: ivlb({{
-                AlphaPseudo::ivlb(xc->tcBase());
-            }}, No_OpClass, IsNonSpeculative);
-            0x11: ivle({{
-                AlphaPseudo::ivle(xc->tcBase());
-            }}, No_OpClass, IsNonSpeculative);
             0x20: m5exit_old({{
                 AlphaPseudo::m5exit_old(xc->tcBase());
             }}, No_OpClass, IsNonSpeculative);