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| author | Korey Sewell <ksewell@umich.edu> | 2011-06-19 21:43:41 -0400 |
|---|---|---|
| committer | Korey Sewell <ksewell@umich.edu> | 2011-06-19 21:43:41 -0400 |
| commit | 716e447da8424386f2c3448c17891927aeb49f67 (patch) | |
| tree | 7cd5ba23161faa0a5337b5a7add3f75569bbfd76 /src/cpu/inorder/resources/execution_unit.cc | |
| parent | 83a0fd24f72ed46e71c015c23b723c04d39ca93c (diff) | |
| download | gem5-716e447da8424386f2c3448c17891927aeb49f67.tar.xz | |
inorder: handle serializing instructions
including IPR accesses and store-conditionals. These class of instructions will not
execute correctly in a superscalar machine
Diffstat (limited to 'src/cpu/inorder/resources/execution_unit.cc')
| -rw-r--r-- | src/cpu/inorder/resources/execution_unit.cc | 20 |
1 files changed, 4 insertions, 16 deletions
diff --git a/src/cpu/inorder/resources/execution_unit.cc b/src/cpu/inorder/resources/execution_unit.cc index c1945488c..255756956 100644 --- a/src/cpu/inorder/resources/execution_unit.cc +++ b/src/cpu/inorder/resources/execution_unit.cc @@ -45,7 +45,7 @@ ExecutionUnit::ExecutionUnit(string res_name, int res_id, int res_width, int res_latency, InOrderCPU *_cpu, ThePipeline::Params *params) : Resource(res_name, res_id, res_width, res_latency, _cpu), - lastExecuteTick(0), lastControlTick(0), serializeTick(0) + lastExecuteTick(0), lastControlTick(0) { } void @@ -103,13 +103,6 @@ ExecutionUnit::execute(int slot_num) #if TRACING_ON InstSeqNum seq_num = inst->seqNum; #endif - if (cur_tick == serializeTick) { - DPRINTF(InOrderExecute, "Can not execute [tid:%i][sn:%i][PC:%s] %s. " - "All instructions are being serialized this cycle\n", - inst->readTid(), seq_num, inst->pcState(), inst->instName()); - exec_req->done(false); - return; - } switch (exec_req->cmd) { @@ -131,15 +124,9 @@ ExecutionUnit::execute(int slot_num) lastExecuteTick = cur_tick; } + //@todo: handle address generation here assert(!inst->isMemRef()); - if (inst->isSerializeAfter()) { - serializeTick = cur_tick; - DPRINTF(InOrderExecute, "Serializing execution after [tid:%i] " - "[sn:%i] [PC:%s] %s.\n", inst->readTid(), seq_num, - inst->pcState(), inst->instName()); - } - if (inst->isControl()) { if (lastControlTick == cur_tick) { DPRINTF(InOrderExecute, "Can not Execute More than One Control " @@ -219,11 +206,12 @@ ExecutionUnit::execute(int slot_num) #if TRACING_ON for (int didx = 0; didx < inst->numDestRegs(); didx++) if (inst->resultType(didx) == InOrderDynInst::Float || + inst->resultType(didx) == InOrderDynInst::FloatBits || inst->resultType(didx) == InOrderDynInst::Double) DPRINTF(InOrderExecute, "[tid:%i]: [sn:%i]: Dest result %i " "of FP execution is %08f (%x).\n", inst->readTid(), seq_num, didx, inst->readFloatResult(didx), - inst->readIntResult(didx)); + inst->readFloatBitsResult(didx)); else DPRINTF(InOrderExecute, "[tid:%i]: [sn:%i]: Dest result %i " "of Int execution is 0x%x.\n", inst->readTid(), |