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Merge zizzer.eecs.umich.edu:/bk/newmem

Browse source 
into  doughnut.hpl.hp.com:/home/gblack/newmem-o3-micro

src/cpu/base_dyn_inst_impl.hh:
src/cpu/o3/fetch_impl.hh:
    Hand merge

--HG--
extra : convert_revision : 0c0692033ac30133672d8dfe1f1a27e9d9e95a3d
This commit is contained in:
Gabe Black 2007-06-19 18:54:40 -07:00
commit 5c48a05813
35 changed files with 474 additions and 470 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
src/arch/sparc/isa/formats/mem/basicmem.isa
View file

@ -57,10 +57,12 @@ let {{
addrCalcImm = 'EA = Rs1 + imm;'
iop = InstObjParams(name, Name, 'Mem',
{"code": code, "postacc_code" : postacc_code,
"fault_check": faultCode, "ea_code": addrCalcReg}, opt_flags)
"fault_check": faultCode, "ea_code": addrCalcReg,
"EA_trunc": TruncateEA}, opt_flags)
iop_imm = InstObjParams(name, Name + "Imm", 'MemImm',
{"code": code, "postacc_code" : postacc_code,
"fault_check": faultCode, "ea_code": addrCalcImm}, opt_flags)
"fault_check": faultCode, "ea_code": addrCalcImm,
"EA_trunc": TruncateEA}, opt_flags)
header_output = MemDeclare.subst(iop) + MemDeclare.subst(iop_imm)
decoder_output = BasicConstructor.subst(iop) + BasicConstructor.subst(iop_imm)
decode_block = ROrImmDecode.subst(iop)

6
src/arch/sparc/isa/formats/mem/blockmem.isa
View file

@ -298,11 +298,13 @@ let {{
iop = InstObjParams(name, Name, 'BlockMem',
{"code": pcedCode, "ea_code": addrCalcReg,
"fault_check": faultCode, "micro_pc": microPc,
"set_flags": flag_code}, opt_flags)
"set_flags": flag_code, "EA_trunc" : TruncateEA},
opt_flags)
iop_imm = InstObjParams(name, Name + 'Imm', 'BlockMemImm',
{"code": pcedCode, "ea_code": addrCalcImm,
"fault_check": faultCode, "micro_pc": microPc,
"set_flags": flag_code}, opt_flags)
"set_flags": flag_code, "EA_trunc" : TruncateEA},
opt_flags)
decoder_output += BlockMemMicroConstructor.subst(iop)
decoder_output += BlockMemMicroConstructor.subst(iop_imm)
exec_output += doDualSplitExecute(

8
src/arch/sparc/isa/formats/mem/swap.isa
View file

@ -51,6 +51,7 @@ def template SwapExecute {{
}
if(storeCond && fault == NoFault)
{
%(EA_trunc)s
fault = xc->write((uint%(mem_acc_size)s_t)Mem,
EA, %(asi_val)s, &mem_data);
}
@ -91,6 +92,7 @@ def template SwapInitiateAcc {{
}
if(fault == NoFault)
{
%(EA_trunc)s
fault = xc->write((uint%(mem_acc_size)s_t)Mem,
EA, %(asi_val)s, &mem_data);
}
@ -157,12 +159,14 @@ let {{
addrCalcReg = 'EA = Rs1;'
iop = InstObjParams(name, Name, 'Mem',
{"code": code, "postacc_code" : postacc_code,
"fault_check": faultCode, "ea_code": addrCalcReg}, opt_flags)
"fault_check": faultCode, "ea_code": addrCalcReg,
"EA_trunc" : TruncateEA}, opt_flags)
header_output = MemDeclare.subst(iop)
decoder_output = BasicConstructor.subst(iop)
decode_block = BasicDecode.subst(iop)
microParams = {"code": code, "postacc_code" : postacc_code,
"ea_code" : addrCalcReg, "fault_check" : faultCode}
"ea_code" : addrCalcReg, "fault_check" : faultCode,
"EA_trunc" : TruncateEA}
exec_output = doSplitExecute(execute, name, Name, asi,
["IsStoreConditional"], microParams);
return (header_output, decoder_output, exec_output, decode_block)

12
src/arch/sparc/isa/formats/mem/util.isa
View file

@ -149,6 +149,7 @@ def template LoadExecute {{
%(fault_check)s;
if(fault == NoFault)
{
%(EA_trunc)s
fault = xc->read(EA, (%(mem_acc_type)s%(mem_acc_size)s_t&)Mem, %(asi_val)s);
}
if(fault == NoFault)
@ -179,6 +180,7 @@ def template LoadInitiateAcc {{
%(fault_check)s;
if(fault == NoFault)
{
%(EA_trunc)s
fault = xc->read(EA, (%(mem_acc_type)s%(mem_acc_size)s_t&)Mem, %(asi_val)s);
}
return fault;
@ -224,6 +226,7 @@ def template StoreExecute {{
}
if(storeCond && fault == NoFault)
{
%(EA_trunc)s
fault = xc->write((%(mem_acc_type)s%(mem_acc_size)s_t)Mem,
EA, %(asi_val)s, 0);
}
@ -257,6 +260,7 @@ def template StoreInitiateAcc {{
}
if(storeCond && fault == NoFault)
{
%(EA_trunc)s
fault = xc->write((%(mem_acc_type)s%(mem_acc_size)s_t)Mem,
EA, %(asi_val)s, 0);
}
@ -317,6 +321,11 @@ let {{
fault = new PrivilegedAction;
'''
TruncateEA = '''
#if !FULL_SYSTEM
EA = Pstate<3:> ? EA<31:0> : EA;
#endif
'''
}};
//A simple function to generate the name of the macro op of a certain
@ -346,7 +355,8 @@ let {{
(eaRegCode, nameReg, NameReg),
(eaImmCode, nameImm, NameImm)):
microParams = {"code": code, "postacc_code" : postacc_code,
"ea_code": eaCode, "fault_check": faultCode}
"ea_code": eaCode, "fault_check": faultCode,
"EA_trunc" : TruncateEA}
executeCode += doSplitExecute(execute, name, Name,
asi, opt_flags, microParams)
return executeCode

5
src/arch/sparc/isa/operands.isa
View file

@ -149,7 +149,8 @@ def operands {{
'Fprs': ('ControlReg', 'udw', 'MISCREG_FPRS', None, 43),
'Pcr': ('ControlReg', 'udw', 'MISCREG_PCR', None, 44),
'Pic': ('ControlReg', 'udw', 'MISCREG_PIC', None, 45),
'Gsr': ('ControlReg', 'udw', 'MISCREG_GSR', None, 46),
# 'Gsr': ('ControlReg', 'udw', 'MISCREG_GSR', (None, None, ['IsSerializeAfter','IsSerializing','IsNonSpeculative']), 46),
'Gsr': ('IntReg', 'udw', 'NumIntArchRegs + 8', None, 46),
'Softint': ('ControlReg', 'udw', 'MISCREG_SOFTINT', None, 47),
'SoftintSet': ('ControlReg', 'udw', 'MISCREG_SOFTINT_SET', None, 48),
'SoftintClr': ('ControlReg', 'udw', 'MISCREG_SOFTINT_CLR', None, 49),
@ -187,7 +188,7 @@ def operands {{
'Hver': ('ControlReg', 'udw', 'MISCREG_HVER', None, 74),
'StrandStsReg': ('ControlReg', 'udw', 'MISCREG_STRAND_STS_REG', None, 75),
'Fsr': ('ControlReg', 'udw', 'MISCREG_FSR', None, 80),
'Fsr': ('ControlReg', 'udw', 'MISCREG_FSR', (None, None, ['IsSerializeAfter','IsSerializing','IsNonSpeculative']), 80),
# Mem gets a large number so it's always last
'Mem': ('Mem', 'udw', None, ('IsMemRef', 'IsLoad', 'IsStore'), 100)

2
src/arch/sparc/isa_traits.hh
View file

@ -58,7 +58,7 @@ namespace SparcISA
// These enumerate all the registers for dependence tracking.
enum DependenceTags {
FP_Base_DepTag = 32*3+8,
FP_Base_DepTag = 32*3+9,
Ctrl_Base_DepTag = FP_Base_DepTag + 64
};

4
src/arch/sparc/process.cc
View file

@ -88,8 +88,8 @@ Sparc32LiveProcess::startup()
//From the SPARC ABI
//The process runs in user mode
threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02);
//The process runs in user mode with 32 bit addresses
threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x0a);
//Setup default FP state
threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);

2
src/arch/sparc/sparc_traits.hh
View file

@ -42,7 +42,7 @@ namespace SparcISA
// Number of register windows, can legally be 3 to 32
const int NWindows = 8;
//const int NumMicroIntRegs = 1;
const int NumMicroIntRegs = 8;
const int NumMicroIntRegs = 9;
// const int NumRegularIntRegs = MaxGL * 8 + NWindows * 16;
// const int NumMicroIntRegs = 1;

2
src/arch/sparc/types.hh
View file

@ -59,7 +59,7 @@ namespace SparcISA
typedef int RegContextVal;
typedef uint8_t RegIndex;
typedef uint16_t RegIndex;
}
#endif

59
src/cpu/base_dyn_inst.hh
View file

@ -209,6 +209,9 @@ class BaseDynInst : public FastAlloc, public RefCounted
/** PC of this instruction. */
Addr PC;
/** Micro PC of this instruction. */
Addr microPC;
protected:
/** Next non-speculative PC. It is not filled in at fetch, but rather
* once the target of the branch is truly known (either decode or
@ -219,12 +222,18 @@ class BaseDynInst : public FastAlloc, public RefCounted
/** Next non-speculative NPC. Target PC for Mips or Sparc. */
Addr nextNPC;
/** Next non-speculative micro PC. */
Addr nextMicroPC;
/** Predicted next PC. */
Addr predPC;
/** Predicted next NPC. */
Addr predNPC;
/** Predicted next microPC */
Addr predMicroPC;
/** If this is a branch that was predicted taken */
bool predTaken;
@ -340,6 +349,17 @@ class BaseDynInst : public FastAlloc, public RefCounted
{
_flatDestRegIdx[idx] = flattened_dest;
}
/** BaseDynInst constructor given a binary instruction.
* @param staticInst A StaticInstPtr to the underlying instruction.
* @param PC The PC of the instruction.
* @param pred_PC The predicted next PC.
* @param pred_NPC The predicted next NPC.
* @param seq_num The sequence number of the instruction.
* @param cpu Pointer to the instruction's CPU.
*/
BaseDynInst(StaticInstPtr staticInst, Addr PC, Addr NPC, Addr microPC,
Addr pred_PC, Addr pred_NPC, Addr pred_MicroPC,
InstSeqNum seq_num, ImplCPU *cpu);
/** BaseDynInst constructor given a binary instruction.
* @param inst The binary instruction.
@ -349,8 +369,8 @@ class BaseDynInst : public FastAlloc, public RefCounted
* @param seq_num The sequence number of the instruction.
* @param cpu Pointer to the instruction's CPU.
*/
BaseDynInst(TheISA::ExtMachInst inst, Addr PC, Addr NPC,
Addr pred_PC, Addr pred_NPC,
BaseDynInst(TheISA::ExtMachInst inst, Addr PC, Addr NPC, Addr microPC,
Addr pred_PC, Addr pred_NPC, Addr pred_MicroPC,
InstSeqNum seq_num, ImplCPU *cpu);
/** BaseDynInst constructor given a StaticInst pointer.
@ -402,11 +422,18 @@ class BaseDynInst : public FastAlloc, public RefCounted
#endif
}
Addr readNextMicroPC()
{
return nextMicroPC;
}
/** Set the predicted target of this current instruction. */
void setPredTarg(Addr predicted_PC, Addr predicted_NPC)
void setPredTarg(Addr predicted_PC, Addr predicted_NPC,
Addr predicted_MicroPC)
{
predPC = predicted_PC;
predNPC = predicted_NPC;
predMicroPC = predicted_MicroPC;
}
/** Returns the predicted PC immediately after the branch. */
@ -415,6 +442,9 @@ class BaseDynInst : public FastAlloc, public RefCounted
/** Returns the predicted PC two instructions after the branch */
Addr readPredNPC() { return predNPC; }
/** Returns the predicted micro PC after the branch */
Addr readPredMicroPC() { return predMicroPC; }
/** Returns whether the instruction was predicted taken or not. */
bool readPredTaken()
{
@ -430,7 +460,8 @@ class BaseDynInst : public FastAlloc, public RefCounted
bool mispredicted()
{
return readPredPC() != readNextPC() ||
readPredNPC() != readNextNPC();
readPredNPC() != readNextNPC() ||
readPredMicroPC() != readNextMicroPC();
}
//
@ -467,6 +498,12 @@ class BaseDynInst : public FastAlloc, public RefCounted
bool isQuiesce() const { return staticInst->isQuiesce(); }
bool isIprAccess() const { return staticInst->isIprAccess(); }
bool isUnverifiable() const { return staticInst->isUnverifiable(); }
bool isMacroOp() const { return staticInst->isMacroOp(); }
bool isMicroOp() const { return staticInst->isMicroOp(); }
bool isDelayedCommit() const { return staticInst->isDelayedCommit(); }
bool isLastMicroOp() const { return staticInst->isLastMicroOp(); }
bool isFirstMicroOp() const { return staticInst->isFirstMicroOp(); }
bool isMicroBranch() const { return staticInst->isMicroBranch(); }
/** Temporarily sets this instruction as a serialize before instruction. */
void setSerializeBefore() { status.set(SerializeBefore); }
@ -700,16 +737,26 @@ class BaseDynInst : public FastAlloc, public RefCounted
/** Read the PC of this instruction. */
const Addr readPC() const { return PC; }
/**Read the micro PC of this instruction. */
const Addr readMicroPC() const { return microPC; }
/** Set the next PC of this instruction (its actual target). */
void setNextPC(uint64_t val)
void setNextPC(Addr val)
{
nextPC = val;
}
/** Set the next NPC of this instruction (the target in Mips or Sparc).*/
void setNextNPC(uint64_t val)
void setNextNPC(Addr val)
{
#if ISA_HAS_DELAY_SLOT
nextNPC = val;
#endif
}
void setNextMicroPC(Addr val)
{
nextMicroPC = val;
}
/** Sets the ASID. */

55
src/cpu/base_dyn_inst_impl.hh
View file

@ -62,19 +62,66 @@ my_hash_t thishash;
#endif
template <class Impl>
BaseDynInst<Impl>::BaseDynInst(TheISA::ExtMachInst machInst,
BaseDynInst<Impl>::BaseDynInst(StaticInstPtr _staticInst,
Addr inst_PC, Addr inst_NPC,
Addr inst_MicroPC,
Addr pred_PC, Addr pred_NPC,
Addr pred_MicroPC,
InstSeqNum seq_num, ImplCPU *cpu)
: staticInst(machInst, inst_PC), traceData(NULL), cpu(cpu)
: staticInst(_staticInst), traceData(NULL), cpu(cpu)
{
seqNum = seq_num;
bool nextIsMicro =
staticInst->isMicroOp() && !staticInst->isLastMicroOp();
PC = inst_PC;
nextPC = inst_NPC;
nextNPC = nextPC + sizeof(TheISA::MachInst);
microPC = inst_MicroPC;
if (nextIsMicro) {
nextPC = inst_PC;
nextNPC = inst_NPC;
nextMicroPC = microPC + 1;
} else {
nextPC = inst_NPC;
nextNPC = nextPC + sizeof(TheISA::MachInst);
nextMicroPC = 0;
}
predPC = pred_PC;
predNPC = pred_NPC;
predMicroPC = pred_MicroPC;
predTaken = false;
initVars();
}
template <class Impl>
BaseDynInst<Impl>::BaseDynInst(TheISA::ExtMachInst inst,
Addr inst_PC, Addr inst_NPC,
Addr inst_MicroPC,
Addr pred_PC, Addr pred_NPC,
Addr pred_MicroPC,
InstSeqNum seq_num, ImplCPU *cpu)
: staticInst(inst), traceData(NULL), cpu(cpu)
{
seqNum = seq_num;
bool nextIsMicro =
staticInst->isMicroOp() && !staticInst->isLastMicroOp();
PC = inst_PC;
microPC = inst_MicroPC;
if (nextIsMicro) {
nextPC = inst_PC;
nextNPC = inst_NPC;
nextMicroPC = microPC + 1;
} else {
nextPC = inst_NPC;
nextNPC = nextPC + sizeof(TheISA::MachInst);
nextMicroPC = 0;
}
predPC = pred_PC;
predNPC = pred_NPC;
predMicroPC = pred_MicroPC;
predTaken = false;
initVars();

9
src/cpu/o3/alpha/dyn_inst.hh
View file

@ -73,8 +73,13 @@ class AlphaDynInst : public BaseDynInst<Impl>
public:
/** BaseDynInst constructor given a binary instruction. */
AlphaDynInst(ExtMachInst inst, Addr PC, Addr NPC,
Addr Pred_PC, Addr Pred_NPC,
AlphaDynInst(StaticInstPtr staticInst, Addr PC, Addr NPC, Addr microPC,
Addr Pred_PC, Addr Pred_NPC, Addr Pred_MicroPC,
InstSeqNum seq_num, O3CPU *cpu);
/** BaseDynInst constructor given a binary instruction. */
AlphaDynInst(ExtMachInst inst, Addr PC, Addr NPC, Addr microPC,
Addr Pred_PC, Addr Pred_NPC, Addr Pred_MicroPC,
InstSeqNum seq_num, O3CPU *cpu);
/** BaseDynInst constructor given a static inst pointer. */

19
src/cpu/o3/alpha/dyn_inst_impl.hh
View file

@ -31,10 +31,25 @@
#include "cpu/o3/alpha/dyn_inst.hh"
template <class Impl>
AlphaDynInst<Impl>::AlphaDynInst(ExtMachInst inst, Addr PC, Addr NPC,
AlphaDynInst<Impl>::AlphaDynInst(StaticInstPtr staticInst,
Addr PC, Addr NPC, Addr microPC,
Addr Pred_PC, Addr Pred_NPC,
Addr Pred_MicroPC,
InstSeqNum seq_num, O3CPU *cpu)
: BaseDynInst<Impl>(inst, PC, NPC, Pred_PC, Pred_NPC, seq_num, cpu)
: BaseDynInst<Impl>(staticInst, PC, NPC, microPC,
Pred_PC, Pred_NPC, Pred_MicroPC, seq_num, cpu)
{
initVars();
}
template <class Impl>
AlphaDynInst<Impl>::AlphaDynInst(ExtMachInst inst,
Addr PC, Addr NPC, Addr microPC,
Addr Pred_PC, Addr Pred_NPC,
Addr Pred_MicroPC,
InstSeqNum seq_num, O3CPU *cpu)
: BaseDynInst<Impl>(inst, PC, NPC, microPC,
Pred_PC, Pred_NPC, Pred_MicroPC, seq_num, cpu)
{
initVars();
}

26
src/cpu/o3/comm.hh
View file

@ -87,10 +87,10 @@ struct DefaultIEWDefaultCommit {
bool squash[Impl::MaxThreads];
bool branchMispredict[Impl::MaxThreads];
bool branchTaken[Impl::MaxThreads];
bool squashDelaySlot[Impl::MaxThreads];
uint64_t mispredPC[Impl::MaxThreads];
uint64_t nextPC[Impl::MaxThreads];
uint64_t nextNPC[Impl::MaxThreads];
Addr mispredPC[Impl::MaxThreads];
Addr nextPC[Impl::MaxThreads];
Addr nextNPC[Impl::MaxThreads];
Addr nextMicroPC[Impl::MaxThreads];
InstSeqNum squashedSeqNum[Impl::MaxThreads];
bool includeSquashInst[Impl::MaxThreads];
@ -114,15 +114,15 @@ struct TimeBufStruct {
uint64_t branchAddr;
InstSeqNum doneSeqNum;
InstSeqNum bdelayDoneSeqNum;
// @todo: Might want to package this kind of branch stuff into a single
// struct as it is used pretty frequently.
bool branchMispredict;
bool branchTaken;
uint64_t mispredPC;
uint64_t nextPC;
uint64_t nextNPC;
Addr mispredPC;
Addr nextPC;
Addr nextNPC;
Addr nextMicroPC;
unsigned branchCount;
};
@ -160,18 +160,16 @@ struct TimeBufStruct {
bool branchMispredict;
bool branchTaken;
uint64_t mispredPC;
uint64_t nextPC;
uint64_t nextNPC;
Addr mispredPC;
Addr nextPC;
Addr nextNPC;
Addr nextMicroPC;
// Represents the instruction that has either been retired or
// squashed. Similar to having a single bus that broadcasts the
// retired or squashed sequence number.
InstSeqNum doneSeqNum;
InstSeqNum bdelayDoneSeqNum;
bool squashDelaySlot;
//Just in case we want to do a commit/squash on a cycle
//(necessary for multiple ROBs?)
bool commitInsts;

34
src/cpu/o3/commit.hh
View file

@ -279,25 +279,37 @@ class DefaultCommit
/** Returns the PC of the head instruction of the ROB.
* @todo: Probably remove this function as it returns only thread 0.
*/
uint64_t readPC() { return PC[0]; }
Addr readPC() { return PC[0]; }
/** Returns the PC of a specific thread. */
uint64_t readPC(unsigned tid) { return PC[tid]; }
Addr readPC(unsigned tid) { return PC[tid]; }
/** Sets the PC of a specific thread. */
void setPC(uint64_t val, unsigned tid) { PC[tid] = val; }
void setPC(Addr val, unsigned tid) { PC[tid] = val; }
/** Reads the micro PC of a specific thread. */
Addr readMicroPC(unsigned tid) { return microPC[tid]; }
/** Sets the micro PC of a specific thread */
void setMicroPC(Addr val, unsigned tid) { microPC[tid] = val; }
/** Reads the next PC of a specific thread. */
uint64_t readNextPC(unsigned tid) { return nextPC[tid]; }
Addr readNextPC(unsigned tid) { return nextPC[tid]; }
/** Sets the next PC of a specific thread. */
void setNextPC(uint64_t val, unsigned tid) { nextPC[tid] = val; }
void setNextPC(Addr val, unsigned tid) { nextPC[tid] = val; }
/** Reads the next NPC of a specific thread. */
uint64_t readNextNPC(unsigned tid) { return nextNPC[tid]; }
Addr readNextNPC(unsigned tid) { return nextNPC[tid]; }
/** Sets the next NPC of a specific thread. */
void setNextNPC(uint64_t val, unsigned tid) { nextNPC[tid] = val; }
void setNextNPC(Addr val, unsigned tid) { nextNPC[tid] = val; }
/** Reads the micro PC of a specific thread. */
Addr readNextMicroPC(unsigned tid) { return nextMicroPC[tid]; }
/** Sets the micro PC of a specific thread */
void setNextMicroPC(Addr val, unsigned tid) { nextMicroPC[tid] = val; }
private:
/** Time buffer interface. */
@ -402,12 +414,20 @@ class DefaultCommit
*/
Addr PC[Impl::MaxThreads];
/** The commit micro PC of each thread. Refers to the instruction that
* is currently being processed/committed.
*/
Addr microPC[Impl::MaxThreads];
/** The next PC of each thread. */
Addr nextPC[Impl::MaxThreads];
/** The next NPC of each thread. */
Addr nextNPC[Impl::MaxThreads];
/** The next micro PC of each thread. */
Addr nextMicroPC[Impl::MaxThreads];
/** The sequence number of the youngest valid instruction in the ROB. */
InstSeqNum youngestSeqNum[Impl::MaxThreads];

86
src/cpu/o3/commit_impl.hh
View file

@ -124,7 +124,7 @@ DefaultCommit<Impl>::DefaultCommit(O3CPU *_cpu, Params *params)
committedStores[i] = false;
trapSquash[i] = false;
tcSquash[i] = false;
PC[i] = nextPC[i] = nextNPC[i] = 0;
microPC[i] = nextMicroPC[i] = PC[i] = nextPC[i] = nextNPC[i] = 0;
}
#if FULL_SYSTEM
interrupt = NoFault;
@ -508,6 +508,7 @@ DefaultCommit<Impl>::squashAll(unsigned tid)
toIEW->commitInfo[tid].nextPC = PC[tid];
toIEW->commitInfo[tid].nextNPC = nextPC[tid];
toIEW->commitInfo[tid].nextMicroPC = nextMicroPC[tid];
}
template <class Impl>
@ -738,38 +739,15 @@ DefaultCommit<Impl>::commit()
// then use one older sequence number.
InstSeqNum squashed_inst = fromIEW->squashedSeqNum[tid];
#if ISA_HAS_DELAY_SLOT
InstSeqNum bdelay_done_seq_num = squashed_inst;
bool squash_bdelay_slot = fromIEW->squashDelaySlot[tid];
bool branchMispredict = fromIEW->branchMispredict[tid];
// Squashing/not squashing the branch delay slot only makes
// sense when you're squashing from a branch, ie from a branch
// mispredict.
if (branchMispredict && !squash_bdelay_slot) {
bdelay_done_seq_num++;
}
#endif
if (fromIEW->includeSquashInst[tid] == true) {
squashed_inst--;
#if ISA_HAS_DELAY_SLOT
bdelay_done_seq_num--;
#endif
}
// All younger instructions will be squashed. Set the sequence
// number as the youngest instruction in the ROB.
youngestSeqNum[tid] = squashed_inst;
#if ISA_HAS_DELAY_SLOT
rob->squash(bdelay_done_seq_num, tid);
toIEW->commitInfo[tid].squashDelaySlot = squash_bdelay_slot;
toIEW->commitInfo[tid].bdelayDoneSeqNum = bdelay_done_seq_num;
#else
rob->squash(squashed_inst, tid);
toIEW->commitInfo[tid].squashDelaySlot = true;
#endif
changedROBNumEntries[tid] = true;
toIEW->commitInfo[tid].doneSeqNum = squashed_inst;
@ -788,6 +766,7 @@ DefaultCommit<Impl>::commit()
toIEW->commitInfo[tid].nextPC = fromIEW->nextPC[tid];
toIEW->commitInfo[tid].nextNPC = fromIEW->nextNPC[tid];
toIEW->commitInfo[tid].nextMicroPC = fromIEW->nextMicroPC[tid];
toIEW->commitInfo[tid].mispredPC = fromIEW->mispredPC[tid];
@ -806,10 +785,6 @@ DefaultCommit<Impl>::commit()
// Try to commit any instructions.
commitInsts();
} else {
#if ISA_HAS_DELAY_SLOT
skidInsert();
#endif
}
//Check for any activity
@ -901,6 +876,7 @@ DefaultCommit<Impl>::commitInsts()
PC[tid] = head_inst->readPC();
nextPC[tid] = head_inst->readNextPC();
nextNPC[tid] = head_inst->readNextNPC();
nextMicroPC[tid] = head_inst->readNextMicroPC();
// Increment the total number of non-speculative instructions
// executed.
@ -929,12 +905,10 @@ DefaultCommit<Impl>::commitInsts()
}
PC[tid] = nextPC[tid];
#if ISA_HAS_DELAY_SLOT
nextPC[tid] = nextNPC[tid];
nextNPC[tid] = nextNPC[tid] + sizeof(TheISA::MachInst);
#else
nextPC[tid] = nextPC[tid] + sizeof(TheISA::MachInst);
#endif
microPC[tid] = nextMicroPC[tid];
nextMicroPC[tid] = microPC[tid] + 1;
#if FULL_SYSTEM
int count = 0;
@ -1161,37 +1135,13 @@ DefaultCommit<Impl>::getInsts()
{
DPRINTF(Commit, "Getting instructions from Rename stage.\n");
#if ISA_HAS_DELAY_SLOT
// Read any renamed instructions and place them into the ROB.
int insts_to_process = std::min((int)renameWidth,
(int)(fromRename->size + skidBuffer.size()));
int rename_idx = 0;
DPRINTF(Commit, "%i insts available to process. Rename Insts:%i "
"SkidBuffer Insts:%i\n", insts_to_process, fromRename->size,
skidBuffer.size());
#else
// Read any renamed instructions and place them into the ROB.
int insts_to_process = std::min((int)renameWidth, fromRename->size);
#endif
for (int inst_num = 0; inst_num < insts_to_process; ++inst_num) {
DynInstPtr inst;
#if ISA_HAS_DELAY_SLOT
// Get insts from skidBuffer or from Rename
if (skidBuffer.size() > 0) {
DPRINTF(Commit, "Grabbing skidbuffer inst.\n");
inst = skidBuffer.front();
skidBuffer.pop();
} else {
DPRINTF(Commit, "Grabbing rename inst.\n");
inst = fromRename->insts[rename_idx++];
}
#else
inst = fromRename->insts[inst_num];
#endif
int tid = inst->threadNumber;
if (!inst->isSquashed() &&
@ -1213,30 +1163,6 @@ DefaultCommit<Impl>::getInsts()
inst->readPC(), inst->seqNum, tid);
}
}
#if ISA_HAS_DELAY_SLOT
if (rename_idx < fromRename->size) {
DPRINTF(Commit,"Placing Rename Insts into skidBuffer.\n");
for (;
rename_idx < fromRename->size;
rename_idx++) {
DynInstPtr inst = fromRename->insts[rename_idx];
if (!inst->isSquashed()) {
DPRINTF(Commit, "Inserting PC %#x [sn:%i] [tid:%i] into ",
"skidBuffer.\n", inst->readPC(), inst->seqNum,
inst->threadNumber);
skidBuffer.push(inst);
} else {
DPRINTF(Commit, "Instruction PC %#x [sn:%i] [tid:%i] was "
"squashed, skipping.\n",
inst->readPC(), inst->seqNum, inst->threadNumber);
}
}
}
#endif
}
template <class Impl>

40
src/cpu/o3/cpu.cc
View file

@ -696,7 +696,7 @@ FullO3CPU<Impl>::removeThread(unsigned tid)
// Squash Throughout Pipeline
InstSeqNum squash_seq_num = commit.rob->readHeadInst(tid)->seqNum;
fetch.squash(0, sizeof(TheISA::MachInst), squash_seq_num, true, tid);
fetch.squash(0, sizeof(TheISA::MachInst), 0, squash_seq_num, tid);
decode.squash(tid);
rename.squash(squash_seq_num, tid);
iew.squash(tid);
@ -1150,6 +1150,20 @@ FullO3CPU<Impl>::setPC(Addr new_PC,unsigned tid)
commit.setPC(new_PC, tid);
}
template <class Impl>
uint64_t
FullO3CPU<Impl>::readMicroPC(unsigned tid)
{
return commit.readMicroPC(tid);
}
template <class Impl>
void
FullO3CPU<Impl>::setMicroPC(Addr new_PC,unsigned tid)
{
commit.setMicroPC(new_PC, tid);
}
template <class Impl>
uint64_t
FullO3CPU<Impl>::readNextPC(unsigned tid)
@ -1178,6 +1192,20 @@ FullO3CPU<Impl>::setNextNPC(uint64_t val,unsigned tid)
commit.setNextNPC(val, tid);
}
template <class Impl>
uint64_t
FullO3CPU<Impl>::readNextMicroPC(unsigned tid)
{
return commit.readNextMicroPC(tid);
}
template <class Impl>
void
FullO3CPU<Impl>::setNextMicroPC(Addr new_PC,unsigned tid)
{
commit.setNextMicroPC(new_PC, tid);
}
template <class Impl>
typename FullO3CPU<Impl>::ListIt
FullO3CPU<Impl>::addInst(DynInstPtr &inst)
@ -1226,9 +1254,7 @@ FullO3CPU<Impl>::removeFrontInst(DynInstPtr &inst)
template <class Impl>
void
FullO3CPU<Impl>::removeInstsNotInROB(unsigned tid,
bool squash_delay_slot,
const InstSeqNum &delay_slot_seq_num)
FullO3CPU<Impl>::removeInstsNotInROB(unsigned tid)
{
DPRINTF(O3CPU, "Thread %i: Deleting instructions from instruction"
" list.\n", tid);
@ -1259,12 +1285,6 @@ FullO3CPU<Impl>::removeInstsNotInROB(unsigned tid,
while (inst_it != end_it) {
assert(!instList.empty());
#if ISA_HAS_DELAY_SLOT
if(!squash_delay_slot &&
delay_slot_seq_num >= (*inst_it)->seqNum) {
break;
}
#endif
squashInstIt(inst_it, tid);
inst_it--;

25
src/cpu/o3/cpu.hh
View file

@ -433,22 +433,34 @@ class FullO3CPU : public BaseO3CPU
void setArchFloatRegInt(int reg_idx, uint64_t val, unsigned tid);
/** Reads the commit PC of a specific thread. */
uint64_t readPC(unsigned tid);
Addr readPC(unsigned tid);
/** Sets the commit PC of a specific thread. */
void setPC(Addr new_PC, unsigned tid);
/** Reads the commit micro PC of a specific thread. */
Addr readMicroPC(unsigned tid);
/** Sets the commmit micro PC of a specific thread. */
void setMicroPC(Addr new_microPC, unsigned tid);
/** Reads the next PC of a specific thread. */
uint64_t readNextPC(unsigned tid);
Addr readNextPC(unsigned tid);
/** Sets the next PC of a specific thread. */
void setNextPC(uint64_t val, unsigned tid);
void setNextPC(Addr val, unsigned tid);
/** Reads the next NPC of a specific thread. */
uint64_t readNextNPC(unsigned tid);
Addr readNextNPC(unsigned tid);
/** Sets the next NPC of a specific thread. */
void setNextNPC(uint64_t val, unsigned tid);
void setNextNPC(Addr val, unsigned tid);
/** Reads the commit next micro PC of a specific thread. */
Addr readNextMicroPC(unsigned tid);
/** Sets the commit next micro PC of a specific thread. */
void setNextMicroPC(Addr val, unsigned tid);
/** Function to add instruction onto the head of the list of the
* instructions. Used when new instructions are fetched.
@ -468,8 +480,7 @@ class FullO3CPU : public BaseO3CPU
/** Remove all instructions that are not currently in the ROB.
* There's also an option to not squash delay slot instructions.*/
void removeInstsNotInROB(unsigned tid, bool squash_delay_slot,
const InstSeqNum &delay_slot_seq_num);
void removeInstsNotInROB(unsigned tid);
/** Remove all instructions younger than the given sequence number. */
void removeInstsUntil(const InstSeqNum &seq_num,unsigned tid);

69
src/cpu/o3/decode_impl.hh
View file

@ -49,8 +49,6 @@ DefaultDecode<Impl>::DefaultDecode(O3CPU *_cpu, Params *params)
stalls[i].rename = false;
stalls[i].iew = false;
stalls[i].commit = false;
squashAfterDelaySlot[i] = false;
}
// @todo: Make into a parameter
@ -275,20 +273,16 @@ DefaultDecode<Impl>::squash(DynInstPtr &inst, unsigned tid)
///explicitly for ISAs with delay slots.
toFetch->decodeInfo[tid].nextNPC =
inst->branchTarget() + sizeof(TheISA::MachInst);
toFetch->decodeInfo[tid].nextMicroPC = inst->readMicroPC();
#if ISA_HAS_DELAY_SLOT
toFetch->decodeInfo[tid].branchTaken = inst->readNextNPC() !=
(inst->readNextPC() + sizeof(TheISA::MachInst));
toFetch->decodeInfo[tid].bdelayDoneSeqNum = bdelayDoneSeqNum[tid];
squashAfterDelaySlot[tid] = false;
InstSeqNum squash_seq_num = bdelayDoneSeqNum[tid];
#else
toFetch->decodeInfo[tid].branchTaken =
inst->readNextPC() != (inst->readPC() + sizeof(TheISA::MachInst));
#endif
InstSeqNum squash_seq_num = inst->seqNum;
#endif
// Might have to tell fetch to unblock.
if (decodeStatus[tid] == Blocked ||
@ -309,30 +303,10 @@ DefaultDecode<Impl>::squash(DynInstPtr &inst, unsigned tid)
// Clear the instruction list and skid buffer in case they have any
// insts in them.
while (!insts[tid].empty()) {
#if ISA_HAS_DELAY_SLOT
if (insts[tid].front()->seqNum <= squash_seq_num) {
DPRINTF(Decode, "[tid:%i]: Cannot remove incoming decode "
"instructions before delay slot [sn:%i]. %i insts"
"left in decode.\n", tid, squash_seq_num,
insts[tid].size());
break;
}
#endif
insts[tid].pop();
}
while (!skidBuffer[tid].empty()) {
#if ISA_HAS_DELAY_SLOT
if (skidBuffer[tid].front()->seqNum <= squash_seq_num) {
DPRINTF(Decode, "[tid:%i]: Cannot remove skidBuffer "
"instructions before delay slot [sn:%i]. %i insts"
"left in decode.\n", tid, squash_seq_num,
insts[tid].size());
break;
}
#endif
skidBuffer[tid].pop();
}
@ -760,48 +734,13 @@ DefaultDecode<Impl>::decodeInsts(unsigned tid)
// Might want to set some sort of boolean and just do
// a check at the end
#if !ISA_HAS_DELAY_SLOT
squash(inst, inst->threadNumber);
Addr target = inst->branchTarget();
inst->setPredTarg(target, target + sizeof(TheISA::MachInst));
//The micro pc after an instruction level branch should be 0
inst->setPredTarg(target, target + sizeof(TheISA::MachInst), 0);
break;
#else
// If mispredicted as taken, then ignore delay slot
// instruction... else keep delay slot and squash
// after it is sent to rename
if (inst->readPredTaken() && inst->isCondDelaySlot()) {
DPRINTF(Decode, "[tid:%i]: Conditional delay slot inst."
"[sn:%i] PC %#x mispredicted as taken.\n", tid,
inst->seqNum, inst->PC);
bdelayDoneSeqNum[tid] = inst->seqNum;
squash(inst, inst->threadNumber);
Addr target = inst->branchTarget();
inst->setPredTarg(target,
target + sizeof(TheISA::MachInst));
break;
} else {
DPRINTF(Decode, "[tid:%i]: Misprediction detected at "
"[sn:%i] PC %#x, will squash after delay slot "
"inst. is sent to Rename\n",
tid, inst->seqNum, inst->PC);
bdelayDoneSeqNum[tid] = inst->seqNum + 1;
squashAfterDelaySlot[tid] = true;
squashInst[tid] = inst;
continue;
}
#endif
}
}
if (squashAfterDelaySlot[tid]) {
assert(!inst->isSquashed());
squash(squashInst[tid], squashInst[tid]->threadNumber);
Addr target = squashInst[tid]->branchTarget();
squashInst[tid]->setPredTarg(target,
target + sizeof(TheISA::MachInst));
assert(!inst->isSquashed());
break;
}
}
// If we didn't process all instructions, then we will need to block

20
src/cpu/o3/fetch.hh
View file

@ -227,7 +227,7 @@ class DefaultFetch
* @param next_NPC Used for ISAs which use delay slots.
* @return Whether or not a branch was predicted as taken.
*/
bool lookupAndUpdateNextPC(DynInstPtr &inst, Addr &next_PC, Addr &next_NPC);
bool lookupAndUpdateNextPC(DynInstPtr &inst, Addr &next_PC, Addr &next_NPC, Addr &next_MicroPC);
/**
* Fetches the cache line that contains fetch_PC. Returns any
@ -242,12 +242,14 @@ class DefaultFetch
bool fetchCacheLine(Addr fetch_PC, Fault &ret_fault, unsigned tid);
/** Squashes a specific thread and resets the PC. */
inline void doSquash(const Addr &new_PC, const Addr &new_NPC, unsigned tid);
inline void doSquash(const Addr &new_PC, const Addr &new_NPC,
const Addr &new_MicroPC, unsigned tid);
/** Squashes a specific thread and resets the PC. Also tells the CPU to
* remove any instructions between fetch and decode that should be sqaushed.
*/
void squashFromDecode(const Addr &new_PC, const Addr &new_NPC,
const Addr &new_MicroPC,
const InstSeqNum &seq_num, unsigned tid);
/** Checks if a thread is stalled. */
@ -263,8 +265,8 @@ class DefaultFetch
* squash should be the commit stage.
*/
void squash(const Addr &new_PC, const Addr &new_NPC,
const InstSeqNum &seq_num,
bool squash_delay_slot, unsigned tid);
const Addr &new_MicroPC,
const InstSeqNum &seq_num, unsigned tid);
/** Ticks the fetch stage, processing all inputs signals and fetching
* as many instructions as possible.
@ -347,16 +349,12 @@ class DefaultFetch
/** Per-thread fetch PC. */
Addr PC[Impl::MaxThreads];
/** Per-thread fetch micro PC. */
Addr microPC[Impl::MaxThreads];
/** Per-thread next PC. */
Addr nextPC[Impl::MaxThreads];
/** Per-thread next Next PC.
* This is not a real register but is used for
* architectures that use a branch-delay slot.
* (such as MIPS or Sparc)
*/
Addr nextNPC[Impl::MaxThreads];
/** Memory request used to access cache. */
RequestPtr memReq[Impl::MaxThreads];

227
src/cpu/o3/fetch_impl.hh
View file

@ -313,7 +313,7 @@ DefaultFetch<Impl>::initStage()
for (int tid = 0; tid < numThreads; tid++) {
PC[tid] = cpu->readPC(tid);
nextPC[tid] = cpu->readNextPC(tid);
nextNPC[tid] = cpu->readNextNPC(tid);
microPC[tid] = cpu->readMicroPC(tid);
}
for (int tid=0; tid < numThreads; tid++) {
@ -440,11 +440,7 @@ DefaultFetch<Impl>::takeOverFrom()
stalls[i].commit = 0;
PC[i] = cpu->readPC(i);
nextPC[i] = cpu->readNextPC(i);
#if ISA_HAS_DELAY_SLOT
nextNPC[i] = cpu->readNextNPC(i);
#else
nextNPC[i] = nextPC[i] + sizeof(TheISA::MachInst);
#endif
microPC[i] = cpu->readMicroPC(i);
fetchStatus[i] = Running;
}
numInst = 0;
@ -494,7 +490,7 @@ DefaultFetch<Impl>::switchToInactive()
template <class Impl>
bool
DefaultFetch<Impl>::lookupAndUpdateNextPC(DynInstPtr &inst, Addr &next_PC,
Addr &next_NPC)
Addr &next_NPC, Addr &next_MicroPC)
{
// Do branch prediction check here.
// A bit of a misnomer...next_PC is actually the current PC until
@ -502,13 +498,22 @@ DefaultFetch<Impl>::lookupAndUpdateNextPC(DynInstPtr &inst, Addr &next_PC,
bool predict_taken;
if (!inst->isControl()) {
next_PC = next_NPC;
next_NPC = next_NPC + instSize;
inst->setPredTarg(next_PC, next_NPC);
if (inst->isMicroOp() && !inst->isLastMicroOp()) {
next_MicroPC++;
} else {
next_PC = next_NPC;
next_NPC = next_NPC + instSize;
next_MicroPC = 0;
}
inst->setPredTarg(next_PC, next_NPC, next_MicroPC);
inst->setPredTaken(false);
return false;
}
//Assume for now that all control flow is to a different macroop which
//would reset the micro pc to 0.
next_MicroPC = 0;
int tid = inst->threadNumber;
Addr pred_PC = next_PC;
predict_taken = branchPred.predict(inst, pred_PC, tid);
@ -535,7 +540,7 @@ DefaultFetch<Impl>::lookupAndUpdateNextPC(DynInstPtr &inst, Addr &next_PC,
#endif
/* DPRINTF(Fetch, "[tid:%i]: Branch predicted to go to %#x and then %#x.\n",
tid, next_PC, next_NPC);*/
inst->setPredTarg(next_PC, next_NPC);
inst->setPredTarg(next_PC, next_NPC, next_MicroPC);
inst->setPredTaken(predict_taken);
++fetchedBranches;
@ -659,14 +664,14 @@ DefaultFetch<Impl>::fetchCacheLine(Addr fetch_PC, Fault &ret_fault, unsigned tid
template <class Impl>
inline void
DefaultFetch<Impl>::doSquash(const Addr &new_PC,
const Addr &new_NPC, unsigned tid)
const Addr &new_NPC, const Addr &new_microPC, unsigned tid)
{
DPRINTF(Fetch, "[tid:%i]: Squashing, setting PC to: %#x, NPC to: %#x.\n",
tid, new_PC, new_NPC);
PC[tid] = new_PC;
nextPC[tid] = new_NPC;
nextNPC[tid] = new_NPC + instSize;
microPC[tid] = new_microPC;
// Clear the icache miss if it's outstanding.
if (fetchStatus[tid] == IcacheWaitResponse) {
@ -694,12 +699,12 @@ DefaultFetch<Impl>::doSquash(const Addr &new_PC,
template<class Impl>
void
DefaultFetch<Impl>::squashFromDecode(const Addr &new_PC, const Addr &new_NPC,
const InstSeqNum &seq_num,
unsigned tid)
const Addr &new_MicroPC,
const InstSeqNum &seq_num, unsigned tid)
{
DPRINTF(Fetch, "[tid:%i]: Squashing from decode.\n",tid);
doSquash(new_PC, new_NPC, tid);
doSquash(new_PC, new_NPC, new_MicroPC, tid);
// Tell the CPU to remove any instructions that are in flight between
// fetch and decode.
@ -775,20 +780,15 @@ DefaultFetch<Impl>::updateFetchStatus()
template <class Impl>
void
DefaultFetch<Impl>::squash(const Addr &new_PC, const Addr &new_NPC,
const InstSeqNum &seq_num,
bool squash_delay_slot, unsigned tid)
const Addr &new_MicroPC,
const InstSeqNum &seq_num, unsigned tid)
{
DPRINTF(Fetch, "[tid:%u]: Squash from commit.\n",tid);
doSquash(new_PC, new_NPC, tid);
doSquash(new_PC, new_NPC, new_MicroPC, tid);
#if ISA_HAS_DELAY_SLOT
// Tell the CPU to remove any instructions that are not in the ROB.
cpu->removeInstsNotInROB(tid, squash_delay_slot, seq_num);
#else
// Tell the CPU to remove any instructions that are not in the ROB.
cpu->removeInstsNotInROB(tid, true, 0);
#endif
cpu->removeInstsNotInROB(tid);
}
template <class Impl>
@ -897,17 +897,11 @@ DefaultFetch<Impl>::checkSignalsAndUpdate(unsigned tid)
DPRINTF(Fetch, "[tid:%u]: Squashing instructions due to squash "
"from commit.\n",tid);
#if ISA_HAS_DELAY_SLOT
InstSeqNum doneSeqNum = fromCommit->commitInfo[tid].bdelayDoneSeqNum;
#else
InstSeqNum doneSeqNum = fromCommit->commitInfo[tid].doneSeqNum;
#endif
// In any case, squash.
squash(fromCommit->commitInfo[tid].nextPC,
fromCommit->commitInfo[tid].nextNPC,
doneSeqNum,
fromCommit->commitInfo[tid].squashDelaySlot,
fromCommit->commitInfo[tid].nextMicroPC,
fromCommit->commitInfo[tid].doneSeqNum,
tid);
// Also check if there's a mispredict that happened.
@ -956,18 +950,14 @@ DefaultFetch<Impl>::checkSignalsAndUpdate(unsigned tid)
if (fetchStatus[tid] != Squashing) {
#if ISA_HAS_DELAY_SLOT
InstSeqNum doneSeqNum = fromDecode->decodeInfo[tid].bdelayDoneSeqNum;
#else
InstSeqNum doneSeqNum = fromDecode->decodeInfo[tid].doneSeqNum;
#endif
DPRINTF(Fetch, "Squashing from decode with PC = %#x, NPC = %#x\n",
fromDecode->decodeInfo[tid].nextPC,
fromDecode->decodeInfo[tid].nextNPC);
// Squash unless we're already squashing
squashFromDecode(fromDecode->decodeInfo[tid].nextPC,
fromDecode->decodeInfo[tid].nextNPC,
doneSeqNum,
fromDecode->decodeInfo[tid].nextMicroPC,
fromDecode->decodeInfo[tid].doneSeqNum,
tid);
return true;
@ -1021,9 +1011,9 @@ DefaultFetch<Impl>::fetch(bool &status_change)
DPRINTF(Fetch, "Attempting to fetch from [tid:%i]\n", tid);
// The current PC.
Addr &fetch_PC = PC[tid];
Addr &fetch_NPC = nextPC[tid];
Addr fetch_PC = PC[tid];
Addr fetch_NPC = nextPC[tid];
Addr fetch_MicroPC = microPC[tid];
// Fault code for memory access.
Fault fault = NoFault;
@ -1082,6 +1072,7 @@ DefaultFetch<Impl>::fetch(bool &status_change)
Addr next_PC = fetch_PC;
Addr next_NPC = fetch_NPC;
Addr next_MicroPC = fetch_MicroPC;
InstSeqNum inst_seq;
MachInst inst;
@ -1089,6 +1080,9 @@ DefaultFetch<Impl>::fetch(bool &status_change)
// @todo: Fix this hack.
unsigned offset = (fetch_PC & cacheBlkMask) & ~3;
StaticInstPtr staticInst = NULL;
StaticInstPtr macroop = NULL;
if (fault == NoFault) {
// If the read of the first instruction was successful, then grab the
// instructions from the rest of the cache line and put them into the
@ -1101,11 +1095,9 @@ DefaultFetch<Impl>::fetch(bool &status_change)
// ended this fetch block.
bool predicted_branch = false;
for (;
offset < cacheBlkSize &&
numInst < fetchWidth &&
!predicted_branch;
++numInst) {
while (offset < cacheBlkSize &&
numInst < fetchWidth &&
!predicted_branch) {
// If we're branching after this instruction, quite fetching
// from the same block then.
@ -1116,95 +1108,107 @@ DefaultFetch<Impl>::fetch(bool &status_change)
fetch_PC, fetch_NPC);
}
// Get a sequence number.
inst_seq = cpu->getAndIncrementInstSeq();
// Make sure this is a valid index.
assert(offset <= cacheBlkSize - instSize);
// Get the instruction from the array of the cache line.
inst = TheISA::gtoh(*reinterpret_cast<TheISA::MachInst *>
(&cacheData[tid][offset]));
if (!macroop) {
// Get the instruction from the array of the cache line.
inst = TheISA::gtoh(*reinterpret_cast<TheISA::MachInst *>
(&cacheData[tid][offset]));
predecoder.setTC(cpu->thread[tid]->getTC());
predecoder.moreBytes(fetch_PC, fetch_PC, 0, inst);
predecoder.setTC(cpu->thread[tid]->getTC());
predecoder.moreBytes(fetch_PC, fetch_PC, 0, inst);
ext_inst = predecoder.getExtMachInst();
ext_inst = predecoder.getExtMachInst();
staticInst = StaticInstPtr(ext_inst);
if (staticInst->isMacroOp())
macroop = staticInst;
}
do {
if (macroop) {
staticInst = macroop->fetchMicroOp(fetch_MicroPC);
if (staticInst->isLastMicroOp())
macroop = NULL;
}
// Create a new DynInst from the instruction fetched.
DynInstPtr instruction = new DynInst(ext_inst,
fetch_PC, fetch_NPC,
next_PC, next_NPC,
inst_seq, cpu);
instruction->setTid(tid);
// Get a sequence number.
inst_seq = cpu->getAndIncrementInstSeq();
instruction->setASID(tid);
// Create a new DynInst from the instruction fetched.
DynInstPtr instruction = new DynInst(staticInst,
fetch_PC, fetch_NPC, fetch_MicroPC,
next_PC, next_NPC, next_MicroPC,
inst_seq, cpu);
instruction->setTid(tid);
instruction->setThreadState(cpu->thread[tid]);
instruction->setASID(tid);
DPRINTF(Fetch, "[tid:%i]: Instruction PC %#x created "
"[sn:%lli]\n",
tid, instruction->readPC(), inst_seq);
instruction->setThreadState(cpu->thread[tid]);
//DPRINTF(Fetch, "[tid:%i]: MachInst is %#x\n", tid, ext_inst);
DPRINTF(Fetch, "[tid:%i]: Instruction PC %#x created "
"[sn:%lli]\n",
tid, instruction->readPC(), inst_seq);
DPRINTF(Fetch, "[tid:%i]: Instruction is: %s\n",
tid, instruction->staticInst->disassemble(fetch_PC));
//DPRINTF(Fetch, "[tid:%i]: MachInst is %#x\n", tid, ext_inst);
DPRINTF(Fetch, "[tid:%i]: Instruction is: %s\n",
tid, instruction->staticInst->disassemble(fetch_PC));
#if TRACING_ON
instruction->traceData =
Trace::getInstRecord(curTick, cpu->tcBase(tid),
instruction->staticInst,
instruction->readPC());
instruction->traceData =
Trace::getInstRecord(curTick, cpu->tcBase(tid),
instruction->staticInst,
instruction->readPC());
#else
instruction->traceData = NULL;
instruction->traceData = NULL;
#endif
///FIXME This needs to be more robust in dealing with delay slots
#if !ISA_HAS_DELAY_SLOT
// predicted_branch |=
#endif
lookupAndUpdateNextPC(instruction, next_PC, next_NPC);
predicted_branch |= (next_PC != fetch_NPC);
///FIXME This needs to be more robust in dealing with delay slots
predicted_branch |=
lookupAndUpdateNextPC(instruction, next_PC, next_NPC, next_MicroPC);
// Add instruction to the CPU's list of instructions.
instruction->setInstListIt(cpu->addInst(instruction));
// Add instruction to the CPU's list of instructions.
instruction->setInstListIt(cpu->addInst(instruction));
// Write the instruction to the first slot in the queue
// that heads to decode.
toDecode->insts[numInst] = instruction;
// Write the instruction to the first slot in the queue
// that heads to decode.
toDecode->insts[numInst] = instruction;
toDecode->size++;
toDecode->size++;
// Increment stat of fetched instructions.
++fetchedInsts;
// Increment stat of fetched instructions.
++fetchedInsts;
// Move to the next instruction, unless we have a branch.
fetch_PC = next_PC;
fetch_NPC = next_NPC;
// Move to the next instruction, unless we have a branch.
fetch_PC = next_PC;
fetch_NPC = next_NPC;
fetch_MicroPC = next_MicroPC;
if (instruction->isQuiesce()) {
DPRINTF(Fetch, "Quiesce instruction encountered, halting fetch!",
curTick);
fetchStatus[tid] = QuiescePending;
++numInst;
status_change = true;
break;
}
if (instruction->isQuiesce()) {
DPRINTF(Fetch, "Quiesce instruction encountered, halting fetch!",
curTick);
fetchStatus[tid] = QuiescePending;
++numInst;
status_change = true;
break;
}
} while (staticInst->isMicroOp() &&
!staticInst->isLastMicroOp() &&
numInst < fetchWidth);
offset += instSize;
}
if (offset >= cacheBlkSize) {
DPRINTF(Fetch, "[tid:%i]: Done fetching, reached the end of cache "
"block.\n", tid);
if (predicted_branch) {
DPRINTF(Fetch, "[tid:%i]: Done fetching, predicted branch "
"instruction encountered.\n", tid);
} else if (numInst >= fetchWidth) {
DPRINTF(Fetch, "[tid:%i]: Done fetching, reached fetch bandwidth "
"for this cycle.\n", tid);
} else if (predicted_branch) {
DPRINTF(Fetch, "[tid:%i]: Done fetching, predicted branch "
"instruction encountered.\n", tid);
} else if (offset >= cacheBlkSize) {
DPRINTF(Fetch, "[tid:%i]: Done fetching, reached the end of cache "
"block.\n", tid);
}
}
@ -1217,12 +1221,8 @@ DefaultFetch<Impl>::fetch(bool &status_change)
if (fault == NoFault) {
PC[tid] = next_PC;
nextPC[tid] = next_NPC;
nextNPC[tid] = next_NPC + instSize;
#if ISA_HAS_DELAY_SLOT
DPRINTF(Fetch, "[tid:%i]: Setting PC to %08p.\n", tid, PC[tid]);
#else
microPC[tid] = next_MicroPC;
DPRINTF(Fetch, "[tid:%i]: Setting PC to %08p.\n", tid, next_PC);
#endif
} else {
// We shouldn't be in an icache miss and also have a fault (an ITB
// miss)
@ -1240,8 +1240,9 @@ DefaultFetch<Impl>::fetch(bool &status_change)
// We will use a nop in order to carry the fault.
ext_inst = TheISA::NoopMachInst;
StaticInstPtr staticInst = new StaticInst(ext_inst);
// Create a new DynInst from the dummy nop.
DynInstPtr instruction = new DynInst(ext_inst,
DynInstPtr instruction = new DynInst(staticInst,
fetch_PC, fetch_NPC,
next_PC, next_NPC,
inst_seq, cpu);

2
src/cpu/o3/free_list.hh
View file

@ -168,7 +168,9 @@ SimpleFreeList::addReg(PhysRegIndex freed_reg)
if (freed_reg != TheISA::ZeroReg)
freeIntRegs.push(freed_reg);
} else if (freed_reg < numPhysicalRegs) {
#if THE_ISA == ALPHA_ISA
if (freed_reg != (TheISA::ZeroReg + numPhysicalIntRegs))
#endif
freeFloatRegs.push(freed_reg);
}
}

3
src/cpu/o3/iew.hh
View file

@ -402,9 +402,6 @@ class DefaultIEW
/** Records if there is a fetch redirect on this cycle for each thread. */
bool fetchRedirect[Impl::MaxThreads];
/** Keeps track of the last valid branch delay slot instss for threads */
InstSeqNum bdelayDoneSeqNum[Impl::MaxThreads];
/** Used to track if all instructions have been dispatched this cycle.
* If they have not, then blocking must have occurred, and the instructions
* would already be added to the skid buffer.

75
src/cpu/o3/iew_impl.hh
View file

@ -69,7 +69,6 @@ DefaultIEW<Impl>::DefaultIEW(O3CPU *_cpu, Params *params)
dispatchStatus[i] = Running;
stalls[i].commit = false;
fetchRedirect[i] = false;
bdelayDoneSeqNum[i] = 0;
}
wbMax = wbWidth * params->wbDepth;
@ -410,31 +409,14 @@ DefaultIEW<Impl>::squash(unsigned tid)
instQueue.squash(tid);
// Tell the LDSTQ to start squashing.
#if ISA_HAS_DELAY_SLOT
ldstQueue.squash(fromCommit->commitInfo[tid].bdelayDoneSeqNum, tid);
#else
ldstQueue.squash(fromCommit->commitInfo[tid].doneSeqNum, tid);
#endif
updatedQueues = true;
// Clear the skid buffer in case it has any data in it.
DPRINTF(IEW, "[tid:%i]: Removing skidbuffer instructions until [sn:%i].\n",
tid, fromCommit->commitInfo[tid].bdelayDoneSeqNum);
tid, fromCommit->commitInfo[tid].doneSeqNum);
while (!skidBuffer[tid].empty()) {
#if ISA_HAS_DELAY_SLOT
if (skidBuffer[tid].front()->seqNum <=
fromCommit->commitInfo[tid].bdelayDoneSeqNum) {
DPRINTF(IEW, "[tid:%i]: Cannot remove skidbuffer instructions "
"that occur before delay slot [sn:%i].\n",
fromCommit->commitInfo[tid].bdelayDoneSeqNum,
tid);
break;
} else {
DPRINTF(IEW, "[tid:%i]: Removing instruction [sn:%i] from "
"skidBuffer.\n", tid, skidBuffer[tid].front()->seqNum);
}
#endif
if (skidBuffer[tid].front()->isLoad() ||
skidBuffer[tid].front()->isStore() ) {
toRename->iewInfo[tid].dispatchedToLSQ++;
@ -445,8 +427,6 @@ DefaultIEW<Impl>::squash(unsigned tid)
skidBuffer[tid].pop();
}
bdelayDoneSeqNum[tid] = fromCommit->commitInfo[tid].bdelayDoneSeqNum;
emptyRenameInsts(tid);
}
@ -462,38 +442,19 @@ DefaultIEW<Impl>::squashDueToBranch(DynInstPtr &inst, unsigned tid)
toCommit->mispredPC[tid] = inst->readPC();
toCommit->branchMispredict[tid] = true;
int instSize = sizeof(TheISA::MachInst);
#if ISA_HAS_DELAY_SLOT
bool branch_taken =
int instSize = sizeof(TheISA::MachInst);
toCommit->branchTaken[tid] =
!(inst->readNextPC() + instSize == inst->readNextNPC() &&
(inst->readNextPC() == inst->readPC() + instSize ||
inst->readNextPC() == inst->readPC() + 2 * instSize));
DPRINTF(Sparc, "Branch taken = %s [sn:%i]\n",
branch_taken ? "true": "false", inst->seqNum);
toCommit->branchTaken[tid] = branch_taken;
bool squashDelaySlot = true;
// (inst->readNextPC() != inst->readPC() + sizeof(TheISA::MachInst));
DPRINTF(Sparc, "Squash delay slot = %s [sn:%i]\n",
squashDelaySlot ? "true": "false", inst->seqNum);
toCommit->squashDelaySlot[tid] = squashDelaySlot;
//If we're squashing the delay slot, we need to pick back up at NextPC.
//Otherwise, NextPC isn't being squashed, so we should pick back up at
//NextNPC.
if (squashDelaySlot) {
toCommit->nextPC[tid] = inst->readNextPC();
toCommit->nextNPC[tid] = inst->readNextNPC();
} else {
toCommit->nextPC[tid] = inst->readNextNPC();
toCommit->nextNPC[tid] = inst->readNextNPC() + instSize;
}
#else
toCommit->branchTaken[tid] = inst->readNextPC() !=
(inst->readPC() + sizeof(TheISA::MachInst));
toCommit->nextPC[tid] = inst->readNextPC();
toCommit->nextNPC[tid] = inst->readNextPC() + instSize;
#endif
toCommit->nextPC[tid] = inst->readNextPC();
toCommit->nextNPC[tid] = inst->readNextNPC();
toCommit->nextMicroPC[tid] = inst->readNextMicroPC();
toCommit->includeSquashInst[tid] = false;
@ -510,11 +471,7 @@ DefaultIEW<Impl>::squashDueToMemOrder(DynInstPtr &inst, unsigned tid)
toCommit->squash[tid] = true;
toCommit->squashedSeqNum[tid] = inst->seqNum;
toCommit->nextPC[tid] = inst->readNextPC();
#if ISA_HAS_DELAY_SLOT
toCommit->nextNPC[tid] = inst->readNextNPC();
#else
toCommit->nextNPC[tid] = inst->readNextPC() + sizeof(TheISA::MachInst);
#endif
toCommit->branchMispredict[tid] = false;
toCommit->includeSquashInst[tid] = false;
@ -532,11 +489,7 @@ DefaultIEW<Impl>::squashDueToMemBlocked(DynInstPtr &inst, unsigned tid)
toCommit->squash[tid] = true;
toCommit->squashedSeqNum[tid] = inst->seqNum;
toCommit->nextPC[tid] = inst->readPC();
#if ISA_HAS_DELAY_SLOT
toCommit->nextNPC[tid] = inst->readNextPC();
#else
toCommit->nextNPC[tid] = inst->readPC() + sizeof(TheISA::MachInst);
#endif
toCommit->branchMispredict[tid] = false;
// Must include the broadcasted SN in the squash.
@ -880,10 +833,8 @@ DefaultIEW<Impl>::sortInsts()
{
int insts_from_rename = fromRename->size;
#ifdef DEBUG
#if !ISA_HAS_DELAY_SLOT
for (int i = 0; i < numThreads; i++)
assert(insts[i].empty());
#endif
#endif
for (int i = 0; i < insts_from_rename; ++i) {
insts[fromRename->insts[i]->threadNumber].push(fromRename->insts[i]);
@ -894,21 +845,9 @@ template <class Impl>
void
DefaultIEW<Impl>::emptyRenameInsts(unsigned tid)
{
DPRINTF(IEW, "[tid:%i]: Removing incoming rename instructions until "
"[sn:%i].\n", tid, bdelayDoneSeqNum[tid]);
DPRINTF(IEW, "[tid:%i]: Removing incoming rename instructions\n", tid);
while (!insts[tid].empty()) {
#if ISA_HAS_DELAY_SLOT
if (insts[tid].front()->seqNum <= bdelayDoneSeqNum[tid]) {
DPRINTF(IEW, "[tid:%i]: Done removing, cannot remove instruction"
" that occurs at or before delay slot [sn:%i].\n",
tid, bdelayDoneSeqNum[tid]);
break;
} else {
DPRINTF(IEW, "[tid:%i]: Removing incoming rename instruction "
"[sn:%i].\n", tid, insts[tid].front()->seqNum);
}
#endif
if (insts[tid].front()->isLoad() ||
insts[tid].front()->isStore() ) {

4
src/cpu/o3/inst_queue_impl.hh
View file

@ -1005,11 +1005,7 @@ InstructionQueue<Impl>::squash(unsigned tid)
// Read instruction sequence number of last instruction out of the
// time buffer.
#if ISA_HAS_DELAY_SLOT
squashedSeqNum[tid] = fromCommit->commitInfo[tid].bdelayDoneSeqNum;
#else
squashedSeqNum[tid] = fromCommit->commitInfo[tid].doneSeqNum;
#endif
// Call doSquash if there are insts in the IQ
if (count[tid] > 0) {

10
src/cpu/o3/mips/dyn_inst.hh
View file

@ -69,10 +69,16 @@ class MipsDynInst : public BaseDynInst<Impl>
};
public:
/** BaseDynInst constructor given a binary instruction. */
MipsDynInst(StaticInstPtr staticInst,
Addr PC, Addr NPC, Addr microPC,
Addr Pred_PC, Addr Pred_NPC, Addr Pred_MicroPC,
InstSeqNum seq_num, O3CPU *cpu);
/** BaseDynInst constructor given a binary instruction. */
MipsDynInst(ExtMachInst inst,
Addr PC, Addr NPC,
Addr Pred_PC, Addr Pred_NPC,
Addr PC, Addr NPC, Addr microPC,
Addr Pred_PC, Addr Pred_NPC, Addr Pred_MicroPC,
InstSeqNum seq_num, O3CPU *cpu);
/** BaseDynInst constructor given a static inst pointer. */

20
src/cpu/o3/mips/dyn_inst_impl.hh
View file

@ -31,11 +31,23 @@
#include "cpu/o3/mips/dyn_inst.hh"
template <class Impl>
MipsDynInst<Impl>::MipsDynInst(ExtMachInst inst,
Addr PC, Addr NPC,
Addr Pred_PC, Addr Pred_NPC,
MipsDynInst<Impl>::MipsDynInst(StaticInstPtr staticInst,
Addr PC, Addr NPC, Addr microPC,
Addr Pred_PC, Addr Pred_NPC, Addr Pred_MicroPC,
InstSeqNum seq_num, O3CPU *cpu)
: BaseDynInst<Impl>(inst, PC, NPC, Pred_PC, Pred_NPC, seq_num, cpu)
: BaseDynInst<Impl>(staticInst, PC, NPC, microPC,
Pred_PC, Pred_NPC, Pred_MicroPC, seq_num, cpu)
{
initVars();
}
template <class Impl>
MipsDynInst<Impl>::MipsDynInst(ExtMachInst inst,
Addr PC, Addr NPC, Addr microPC,
Addr Pred_PC, Addr Pred_NPC, Addr Pred_MicroPC,
InstSeqNum seq_num, O3CPU *cpu)
: BaseDynInst<Impl>(inst, PC, NPC, microPC,
Pred_PC, Pred_NPC, Pred_MicroPC, seq_num, cpu)
{
initVars();
}

4
src/cpu/o3/regfile.hh
View file

@ -179,7 +179,9 @@ class PhysRegFile
DPRINTF(IEW, "RegFile: Setting float register %i to %#x\n",
int(reg_idx), (uint64_t)val);
#if THE_ISA == ALPHA_ISA
if (reg_idx != TheISA::ZeroReg)
#endif
floatRegFile[reg_idx].d = val;
}
@ -194,7 +196,9 @@ class PhysRegFile
DPRINTF(IEW, "RegFile: Setting float register %i to %#x\n",
int(reg_idx), (uint64_t)val);
#if THE_ISA == ALPHA_ISA
if (reg_idx != TheISA::ZeroReg)
#endif
floatRegFile[reg_idx].d = val;
}

55
src/cpu/o3/rename_impl.hh
View file

@ -356,47 +356,12 @@ DefaultRename<Impl>::squash(const InstSeqNum &squash_seq_num, unsigned tid)
}
// Clear the instruction list and skid buffer in case they have any
// insts in them. Since we support multiple ISAs, we cant just:
// "insts[tid].clear();" or "skidBuffer[tid].clear()" since there is
// a possible delay slot inst for different architectures
// insts[tid].clear();
#if ISA_HAS_DELAY_SLOT
DPRINTF(Rename, "[tid:%i] Squashing incoming decode instructions until "
"[sn:%i].\n",tid, squash_seq_num);
ListIt ilist_it = insts[tid].begin();
while (ilist_it != insts[tid].end()) {
if ((*ilist_it)->seqNum > squash_seq_num) {
(*ilist_it)->setSquashed();
DPRINTF(Rename, "Squashing incoming decode instruction, "
"[tid:%i] [sn:%i] PC %08p.\n", tid, (*ilist_it)->seqNum, (*ilist_it)->PC);
}
ilist_it++;
}
#else
// insts in them.
insts[tid].clear();
#endif
// Clear the skid buffer in case it has any data in it.
// See comments above.
// skidBuffer[tid].clear();
#if ISA_HAS_DELAY_SLOT
DPRINTF(Rename, "[tid:%i] Squashing incoming skidbuffer instructions "
"until [sn:%i].\n", tid, squash_seq_num);
ListIt slist_it = skidBuffer[tid].begin();
while (slist_it != skidBuffer[tid].end()) {
if ((*slist_it)->seqNum > squash_seq_num) {
(*slist_it)->setSquashed();
DPRINTF(Rename, "Squashing skidbuffer instruction, [tid:%i] [sn:%i]"
"PC %08p.\n", tid, (*slist_it)->seqNum, (*slist_it)->PC);
}
slist_it++;
}
resumeUnblocking = (skidBuffer[tid].size() != 0);
DPRINTF(Rename, "Resume unblocking set to %s\n",
resumeUnblocking ? "true" : "false");
#else
skidBuffer[tid].clear();
#endif
doSquash(squash_seq_num, tid);
}
@ -776,10 +741,8 @@ DefaultRename<Impl>::sortInsts()
{
int insts_from_decode = fromDecode->size;
#ifdef DEBUG
#if !ISA_HAS_DELAY_SLOT
for (int i=0; i < numThreads; i++)
assert(insts[i].empty());
#endif
#endif
for (int i = 0; i < insts_from_decode; ++i) {
DynInstPtr inst = fromDecode->insts[i];
@ -1000,6 +963,7 @@ DefaultRename<Impl>::renameSrcRegs(DynInstPtr &inst,unsigned tid)
// Floating point and Miscellaneous registers need their indexes
// adjusted to account for the expanded number of flattened int regs.
flat_src_reg = src_reg - TheISA::FP_Base_DepTag + TheISA::NumIntRegs;
DPRINTF(Rename, "Adjusting reg index from %d to %d.\n", src_reg, flat_src_reg);
}
inst->flattenSrcReg(src_idx, flat_src_reg);
@ -1016,9 +980,11 @@ DefaultRename<Impl>::renameSrcRegs(DynInstPtr &inst,unsigned tid)
// See if the register is ready or not.
if (scoreboard->getReg(renamed_reg) == true) {
DPRINTF(Rename, "[tid:%u]: Register is ready.\n", tid);
DPRINTF(Rename, "[tid:%u]: Register %d is ready.\n", tid, renamed_reg);
inst->markSrcRegReady(src_idx);
} else {
DPRINTF(Rename, "[tid:%u]: Register %d is not ready.\n", tid, renamed_reg);
}
++renameRenameLookups;
@ -1045,6 +1011,7 @@ DefaultRename<Impl>::renameDestRegs(DynInstPtr &inst,unsigned tid)
// Floating point and Miscellaneous registers need their indexes
// adjusted to account for the expanded number of flattened int regs.
flat_dest_reg = dest_reg - TheISA::FP_Base_DepTag + TheISA::NumIntRegs;
DPRINTF(Rename, "Adjusting reg index from %d to %d.\n", dest_reg, flat_dest_reg);
}
inst->flattenDestReg(dest_idx, flat_dest_reg);
@ -1248,13 +1215,7 @@ DefaultRename<Impl>::checkSignalsAndUpdate(unsigned tid)
DPRINTF(Rename, "[tid:%u]: Squashing instructions due to squash from "
"commit.\n", tid);
#if ISA_HAS_DELAY_SLOT
InstSeqNum squashed_seq_num = fromCommit->commitInfo[tid].bdelayDoneSeqNum;
#else
InstSeqNum squashed_seq_num = fromCommit->commitInfo[tid].doneSeqNum;
#endif
squash(squashed_seq_num, tid);
squash(fromCommit->commitInfo[tid].doneSeqNum, tid);
return true;
}

4
src/cpu/o3/rename_map.cc
View file

@ -165,17 +165,21 @@ SimpleRenameMap::rename(RegIndex arch_reg)
// If it's not referencing the zero register, then rename the
// register.
#if THE_ISA == ALPHA_ISA
if (arch_reg != floatZeroReg) {
#endif
renamed_reg = freeList->getFloatReg();
floatRenameMap[arch_reg].physical_reg = renamed_reg;
assert(renamed_reg < numPhysicalRegs &&
renamed_reg >= numPhysicalIntRegs);
#if THE_ISA == ALPHA_ISA
} else {
// Otherwise return the zero register so nothing bad happens.
renamed_reg = floatZeroReg;
}
#endif
} else {
// Subtract off the base offset for miscellaneous registers.
arch_reg = arch_reg - numLogicalRegs;

15
src/cpu/o3/scoreboard.cc
View file

@ -29,6 +29,7 @@
* Kevin Lim
*/
#include "arch/isa_specific.hh"
#include "cpu/o3/scoreboard.hh"
Scoreboard::Scoreboard(unsigned activeThreads,
@ -79,11 +80,18 @@ Scoreboard::name() const
bool
Scoreboard::getReg(PhysRegIndex phys_reg)
{
#if THE_ISA == ALPHA_ISA
// Always ready if int or fp zero reg.
if (phys_reg == zeroRegIdx ||
phys_reg == (zeroRegIdx + numPhysicalIntRegs)) {
return 1;
}
#else
// Always ready if int zero reg.
if (phys_reg == zeroRegIdx) {
return 1;
}
#endif
return regScoreBoard[phys_reg];
}
@ -99,11 +107,18 @@ Scoreboard::setReg(PhysRegIndex phys_reg)
void
Scoreboard::unsetReg(PhysRegIndex ready_reg)
{
#if THE_ISA == ALPHA_ISA
if (ready_reg == zeroRegIdx ||
ready_reg == (zeroRegIdx + numPhysicalIntRegs)) {
// Don't do anything if int or fp zero reg.
return;
}
#else
if (ready_reg == zeroRegIdx) {
// Don't do anything if int zero reg.
return;
}
#endif
regScoreBoard[ready_reg] = 0;
}

5
src/cpu/o3/sparc/cpu_impl.hh
View file

@ -272,7 +272,10 @@ SparcO3CPU<Impl>::getSyscallArg(int i, int tid)
{
TheISA::IntReg idx = TheISA::flattenIntIndex(this->tcBase(tid),
SparcISA::ArgumentReg0 + i);
return this->readArchIntReg(idx, tid);
TheISA::IntReg val = this->readArchIntReg(idx, tid);
if (bits(this->readMiscRegNoEffect(SparcISA::MISCREG_PSTATE, tid), 3, 3))
val = bits(val, 31, 0);
return val;
}
template <class Impl>

10
src/cpu/o3/sparc/dyn_inst.hh
View file

@ -56,8 +56,14 @@ class SparcDynInst : public BaseDynInst<Impl>
public:
/** BaseDynInst constructor given a binary instruction. */
SparcDynInst(TheISA::ExtMachInst inst, Addr PC, Addr NPC,
Addr Pred_PC, Addr Pred_NPC, InstSeqNum seq_num, O3CPU *cpu);
SparcDynInst(StaticInstPtr staticInst, Addr PC, Addr NPC, Addr microPC,
Addr Pred_PC, Addr Pred_NPC, Addr Pred_MicroPC,
InstSeqNum seq_num, O3CPU *cpu);
/** BaseDynInst constructor given a binary instruction. */
SparcDynInst(TheISA::ExtMachInst inst, Addr PC, Addr NPC, Addr microPC,
Addr Pred_PC, Addr Pred_NPC, Addr Pred_MicroPC,
InstSeqNum seq_num, O3CPU *cpu);
/** BaseDynInst constructor given a static inst pointer. */
SparcDynInst(StaticInstPtr &_staticInst);

19
src/cpu/o3/sparc/dyn_inst_impl.hh
View file

@ -31,10 +31,23 @@
#include "cpu/o3/sparc/dyn_inst.hh"
template <class Impl>
SparcDynInst<Impl>::SparcDynInst(TheISA::ExtMachInst inst,
Addr PC, Addr NPC, Addr Pred_PC, Addr Pred_NPC,
SparcDynInst<Impl>::SparcDynInst(StaticInstPtr staticInst,
Addr PC, Addr NPC, Addr microPC,
Addr Pred_PC, Addr Pred_NPC, Addr Pred_MicroPC,
InstSeqNum seq_num, O3CPU *cpu)
: BaseDynInst<Impl>(inst, PC, NPC, Pred_PC, Pred_NPC, seq_num, cpu)
: BaseDynInst<Impl>(staticInst, PC, NPC, microPC,
Pred_PC, Pred_NPC, Pred_MicroPC, seq_num, cpu)
{
initVars();
}
template <class Impl>
SparcDynInst<Impl>::SparcDynInst(TheISA::ExtMachInst inst,
Addr PC, Addr NPC, Addr microPC,
Addr Pred_PC, Addr Pred_NPC, Addr Pred_MicroPC,
InstSeqNum seq_num, O3CPU *cpu)
: BaseDynInst<Impl>(inst, PC, NPC, microPC,
Pred_PC, Pred_NPC, Pred_MicroPC, seq_num, cpu)
{
initVars();
}

2
tests/long/10.mcf/test.py
View file

@ -29,5 +29,5 @@
m5.AddToPath('../configs/common')
from cpu2000 import mcf
workload = mcf(isa, opsys, 'lgred')
workload = mcf(isa, opsys, 'smred')
root.system.cpu.workload = workload.makeLiveProcess()