ShuriZma
/
dolphin
mirror of https://github.com/dolphin-emu/dolphin.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #10172 from JosJuice/reorder-exception 

PPCAnalyst: Less strict interrupt checks in CanSwapAdjacentOps
This commit is contained in:
JosJuice 2022-01-09 19:41:16 +01:00 committed by GitHub
parent bcd1831339 ab8b2f9fe0
commit e5ef597642
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
Source/Core/Core/PowerPC/PPCAnalyst.cpp
View File

@ -205,6 +205,14 @@ bool PPCAnalyzer::CanSwapAdjacentOps(const CodeOp& a, const CodeOp& b) const
{
return false;
}
// Any instruction which can raise an interrupt is *not* a possible swap candidate:
// see [1] for an example of a crash caused by this error.
//
// [1] https://bugs.dolphin-emu.org/issues/5864#note-7
if (a.canCauseException || b.canCauseException)
return false;
if (a_flags & FL_ENDBLOCK)
return false;
if (b_flags & (FL_SET_CRx | FL_ENDBLOCK | FL_TIMER | FL_EVIL | FL_SET_OE))
return false;
if ((b_flags & (FL_RC_BIT | FL_RC_BIT_F)) && (b.inst.Rc))
@ -223,18 +231,10 @@ bool PPCAnalyzer::CanSwapAdjacentOps(const CodeOp& a, const CodeOp& b) const
return false;
}
// For now, only integer ops acceptable. Any instruction which can raise an
// interrupt is *not* a possible swap candidate: see [1] for an example of
// a crash caused by this error.
//
// [1] https://bugs.dolphin-emu.org/issues/5864#note-7
// For now, only integer ops are acceptable.
if (b_info->type != OpType::Integer)
return false;
// And it's possible a might raise an interrupt too (fcmpo/fcmpu)
if (a_info->type != OpType::Integer)
return false;
// Check that we have no register collisions.
// That is, check that none of b's outputs matches any of a's inputs,
// and that none of a's outputs matches any of b's inputs.