From 8561c8366c7c9afd7e6b52b6e2385b3c1dde95a9 Mon Sep 17 00:00:00 2001 From: Ali Saidi Date: Thu, 25 Jan 2007 13:43:46 -0500 Subject: 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 --- src/cpu/simple/base.cc | 2 ++ 1 file changed, 2 insertions(+) (limited to 'src/cpu') 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()) { -- cgit v1.2.3