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Merge pull request #687 from cesys/altivec_lvrx_stvrx_fix 

Fixing Altivec lvrx and stvrx
This commit is contained in:
Justin Moore 2017-03-31 13:35:01 -05:00 committed by GitHub
parent fd85255846 d2605bce18
commit 59f9a19d30
1 changed files with 8 additions and 0 deletions
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8
src/xenia/cpu/ppc/ppc_emit_altivec.cc
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@ -246,6 +246,10 @@ int InstrEmit_lvrx_(PPCHIRBuilder& f, const InstrData& i, uint32_t vd,
f.Branch(end_label);
f.MarkLabel(load_label);
// ea &= ~0xF
// NOTE: need to recalculate ea and eb because after Branch we start a new
// block and we can't use their previous instantiation in the new block
ea = CalculateEA_0(f, ra, rb);
eb = f.And(f.Truncate(ea, INT8_TYPE), f.LoadConstantInt8(0xF));
ea = f.And(ea, f.LoadConstantUint64(~0xFull));
// v = (new >> (16 - eb))
Value* v = f.Permute(f.LoadVectorShl(eb), f.LoadZeroVec128(),
@ -312,6 +316,10 @@ int InstrEmit_stvrx_(PPCHIRBuilder& f, const InstrData& i, uint32_t vd,
auto skip_label = f.NewLabel();
f.BranchFalse(eb, skip_label);
// ea &= ~0xF
// NOTE: need to recalculate ea and eb because after Branch we start a new
// block and we can't use their previous instantiation in the new block
ea = CalculateEA_0(f, ra, rb);
eb = f.And(f.Truncate(ea, INT8_TYPE), f.LoadConstantInt8(0xF));
ea = f.And(ea, f.LoadConstantUint64(~0xFull));
// v = (old & ~mask) | ((new << eb) & mask)
Value* new_value = f.Permute(f.LoadVectorShr(eb), f.LoadVR(vd),