fix smul and sdiv to sign extend, and handle overflow/underflow corretly

Only allow writing/reading of 32 bits of Y
Only allow writing/reading 32 bits of pc when pstate.am
Put any loaded data on the first half of a micro-op in uReg0 so it can't
overwrite the register we are using for address calculation
only erase a entry from the lookup table if it's valid
Put in a temporary check to make sure that lookup table and tlb array stay in sync
if we are interrupted in the middle of a mico-op, reset the micropc/nexpc
so we start  on the first part of it when we come back

src/arch/sparc/isa/decoder.isa:
    fix smul and sdiv to sign extend, and handle overflow/underflow corretly
    Only allow writing/reading of 32 bits of Y
    Only allow writing/reading 32 bits of pc when pstate.am
    Put any loaded data on the first half of a micro-op in uReg0 so it can't
    overwrite the register we are using for address calculation
src/arch/sparc/isa/formats/mem/blockmem.isa:
    Put any loaded data on the first half of a micro-op in uReg0 so it can't
    overwrite the register we are using for address calculation
src/arch/sparc/isa/includes.isa:
    Use limits for 32bit underflow/overflow detection
src/arch/sparc/tlb.cc:
    only erase a entry from the lookup table if it's valid
    Put in a temporary check to make sure that lookup table and tlb array stay in sync
src/arch/sparc/tlb_map.hh:
    add a print function to dump the tlb lookup table
src/cpu/simple/base.cc:
    if we are interrupted in the middle of a mico-op, reset the micropc/nexpc
    so we start  on the first part of it when we come back

--HG--
extra : convert_revision : 50a23837fd888393a5c2aa35cbd1abeebb7f55d4

1 files changed, 2 insertions, 0 deletions

diff --git a/src/cpu/simple/base.cc b/src/cpu/simple/base.cc
index ddccc5a9b..14fefe103 100644
--- a/src/cpu/simple/base.cc
+++ b/src/cpu/simple/base.cc
@@ -439,6 +439,8 @@ BaseSimpleCPU::advancePC(Fault fault)
     if (fault != NoFault) {
         curMacroStaticInst = StaticInst::nullStaticInstPtr;
         fault->invoke(tc);
+        thread->setMicroPC(0);
+        thread->setNextMicroPC(1);
     } else {
         //If we're at the last micro op for this instruction
         if (curStaticInst->isLastMicroOp()) {