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Fixing stvl/stvr.

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This commit is contained in:
Ben Vanik
2014-10-26 02:01:02 -07:00
parent 9649eb0e8d
commit 5bec5bb203
9 changed files with 44 additions and 16 deletions
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30
src/alloy/frontend/ppc/ppc_emit_altivec.cc
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@@ -265,18 +265,16 @@ int InstrEmit_stvlx_(PPCHIRBuilder& f, InstrData& i, uint32_t vd, uint32_t ra,
// we could optimize this to prevent the other load/mask, in that case.
Value* ea = CalculateEA_0(f, ra, rb);
Value* eb = f.And(f.Truncate(ea, INT8_TYPE), f.LoadConstant((int8_t)0xF));
Value* new_value = f.LoadVR(vd);
// ea &= ~0xF
ea = f.And(ea, f.LoadConstant(~0xFull));
// v = (old & ~mask) | ((new >> eb) & mask)
Value* new_value = f.Permute(f.LoadVectorShr(eb), f.LoadZero(VEC128_TYPE),
f.LoadVR(vd), INT8_TYPE);
Value* old_value = f.ByteSwap(f.Load(ea, VEC128_TYPE));
// v = (new >> eb) | (old & (ONE << (16 - eb)))
Value* v = f.Permute(f.LoadVectorShr(eb), f.LoadZero(VEC128_TYPE), new_value,
INT8_TYPE);
v = f.Or(
v, f.And(old_value,
f.Permute(f.LoadVectorShl(f.Sub(f.LoadConstant((int8_t)16), eb)),
f.Not(f.LoadZero(VEC128_TYPE)),
f.LoadZero(VEC128_TYPE), INT8_TYPE)));
// mask = FFFF... >> eb
Value* mask = f.Permute(f.LoadVectorShr(eb), f.LoadZero(VEC128_TYPE),
f.Not(f.LoadZero(VEC128_TYPE)), INT8_TYPE);
Value* v = f.Or(f.And(old_value, f.Not(mask)), f.And(new_value, mask));
// ea &= ~0xF (handled above)
f.Store(ea, f.ByteSwap(v));
return 0;
@@ -301,16 +299,16 @@ int InstrEmit_stvrx_(PPCHIRBuilder& f, InstrData& i, uint32_t vd, uint32_t ra,
// we could optimize this to prevent the other load/mask, in that case.
Value* ea = CalculateEA_0(f, ra, rb);
Value* eb = f.And(f.Truncate(ea, INT8_TYPE), f.LoadConstant((int8_t)0xF));
Value* new_value = f.LoadVR(vd);
// ea &= ~0xF
ea = f.And(ea, f.LoadConstant(~0xFull));
// v = (old & ~mask) | ((new << eb) & mask)
Value* new_value = f.Permute(f.LoadVectorShr(eb), f.LoadVR(vd),
f.LoadZero(VEC128_TYPE), INT8_TYPE);
Value* old_value = f.ByteSwap(f.Load(ea, VEC128_TYPE));
// v = (new << (16 - eb)) | (old & (ONE >> eb))
Value* v = f.Permute(f.LoadVectorShl(f.Sub(f.LoadConstant((int8_t)16), eb)),
new_value, f.LoadZero(VEC128_TYPE), INT8_TYPE);
v = f.Or(v, f.And(old_value,
f.Permute(f.LoadVectorShr(eb), f.LoadZero(VEC128_TYPE),
f.Not(f.LoadZero(VEC128_TYPE)), INT8_TYPE)));
// mask = ~FFFF... >> eb
Value* mask = f.Permute(f.LoadVectorShr(eb), f.Not(f.LoadZero(VEC128_TYPE)),
f.LoadZero(VEC128_TYPE), INT8_TYPE);
Value* v = f.Or(f.And(old_value, f.Not(mask)), f.And(new_value, mask));
// ea &= ~0xF (handled above)
f.Store(ea, f.ByteSwap(v));
return 0;