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inorder: write-hints bug fix

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make sure to only read 1 src reg. for write-hint and any other similar
'store' instruction. Reading the source reg when its not necessary
can cause the simulator to read from uninitialized values
This commit is contained in:
Korey Sewell 2010-03-27 01:40:05 -04:00
parent d484e1b334
commit ac316d45e8
1 changed files with 3 additions and 1 deletions
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4
src/cpu/inorder/pipeline_traits.cc
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@ -116,7 +116,9 @@ bool createBackEndSchedule(DynInstPtr &inst)
if ( inst->isLoad() ) {
M->needs(DCache, CacheUnit::InitiateReadData);
} else if ( inst->isStore() ) {
M->needs(RegManager, UseDefUnit::ReadSrcReg, 1);
if ( inst->numSrcRegs() >= 2 ) {
M->needs(RegManager, UseDefUnit::ReadSrcReg, 1);
}
M->needs(AGEN, AGENUnit::GenerateAddr);
M->needs(DCache, CacheUnit::InitiateWriteData);
}