fabi/Xenia-Canary
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Replacing store vector left/right opcodes by just using permutes.

Browse Source
This commit is contained in:
Ben Vanik
2013-12-15 11:58:54 -08:00
parent a44551c418
commit 88cdb9e36c
7 changed files with 67 additions and 159 deletions
Download Patch File Download Diff File Expand all files Collapse all files

69
src/alloy/frontend/ppc/ppc_emit_altivec.cc
View File

@@ -239,7 +239,14 @@ XEEMITTER(stvxl128, VX128_1(4, 963), VX128_1)(PPCFunctionBuilder& f, Inst
// https://www-01.ibm.com/chips/techlib/techlib.nsf/techdocs/C40E4C6133B31EE8872570B500791108/$file/vector_simd_pem_v_2.07c_26Oct2006_cell.pdf
int InstrEmit_lvlx_(PPCFunctionBuilder& f, InstrData& i, uint32_t vd, uint32_t ra, uint32_t rb) {
Value* ea = ra ? f.Add(f.LoadGPR(ra), f.LoadGPR(rb)) : f.LoadGPR(rb);
Value* v = f.ByteSwap(f.LoadVectorLeft(ea, VEC128_TYPE));
Value* eb = f.And(f.Truncate(ea, INT8_TYPE), f.LoadConstant((int8_t)0xF));
// ea &= ~0xF (load takes care of this)
// v = (new << eb)
Value* v = f.Permute(
f.LoadVectorShl(eb),
f.ByteSwap(f.Load(ea, VEC128_TYPE)),
f.LoadZero(VEC128_TYPE),
INT8_TYPE);
f.StoreVR(vd, v);
return 0;
}
@@ -258,7 +265,14 @@ XEEMITTER(lvlxl128, VX128_1(4, 1539), VX128_1)(PPCFunctionBuilder& f, Inst
int InstrEmit_lvrx_(PPCFunctionBuilder& f, InstrData& i, uint32_t vd, uint32_t ra, uint32_t rb) {
Value* ea = ra ? f.Add(f.LoadGPR(ra), f.LoadGPR(rb)) : f.LoadGPR(rb);
Value* v = f.ByteSwap(f.LoadVectorRight(ea, VEC128_TYPE));
Value* eb = f.And(f.Truncate(ea, INT8_TYPE), f.LoadConstant((int8_t)0xF));
// ea &= ~0xF (load takes care of this)
// v = (new >> (16 - eb))
Value* v = f.Permute(
f.LoadVectorShr(f.Sub(f.LoadConstant((int8_t)16), eb)),
f.LoadZero(VEC128_TYPE),
f.ByteSwap(f.Load(ea, VEC128_TYPE)),
INT8_TYPE);
f.StoreVR(vd, v);
return 0;
}
@@ -276,9 +290,30 @@ XEEMITTER(lvrxl128, VX128_1(4, 1603), VX128_1)(PPCFunctionBuilder& f, Inst
}
int InstrEmit_stvlx_(PPCFunctionBuilder& f, InstrData& i, uint32_t vd, uint32_t ra, uint32_t rb) {
// NOTE: if eb == 0 (so 16b aligned) this equals new_value
// we could optimize this to prevent the other load/mask, in that case.
Value* ea = ra ? f.Add(f.LoadGPR(ra), f.LoadGPR(rb)) : f.LoadGPR(rb);
Value* v = f.ByteSwap(f.LoadVR(vd));
f.StoreVectorLeft(ea, v);
Value* eb = f.And(f.Truncate(ea, INT8_TYPE), f.LoadConstant((int8_t)0xF));
Value* new_value = f.ByteSwap(f.LoadVR(vd));
// ea &= ~0xF (load takes care of this)
Value* old_value = 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)));
// ea &= ~0xF (store takes care of this)
f.Store(ea, v);
return 0;
}
XEEMITTER(stvlx, 0x7C00050E, X )(PPCFunctionBuilder& f, InstrData& i) {
@@ -295,9 +330,31 @@ XEEMITTER(stvlxl128, VX128_1(4, 1795), VX128_1)(PPCFunctionBuilder& f, Inst
}
int InstrEmit_stvrx_(PPCFunctionBuilder& f, InstrData& i, uint32_t vd, uint32_t ra, uint32_t rb) {
// NOTE: if eb == 0 (so 16b aligned) this equals new_value
// we could optimize this to prevent the other load/mask, in that case.
Value* ea = ra ? f.Add(f.LoadGPR(ra), f.LoadGPR(rb)) : f.LoadGPR(rb);
Value* v = f.ByteSwap(f.LoadVR(vd));
f.StoreVectorRight(ea, v);
Value* eb = f.And(f.Truncate(ea, INT8_TYPE), f.LoadConstant((int8_t)0xF));
Value* ebits = f.Mul(eb, f.LoadConstant((int8_t)8));
Value* new_value = f.ByteSwap(f.LoadVR(vd));
// ea &= ~0xF (load takes care of this)
Value* old_value = 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)));
// ea &= ~0xF (store takes care of this)
f.Store(ea, v);
return 0;
}
XEEMITTER(stvrx, 0x7C00054E, X )(PPCFunctionBuilder& f, InstrData& i) {