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nvc0/ir: cache vertex out base so that we don't recompute again

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The global CSE pass stinks and is unable to pull this out. Easy enough
to handle it here and avoid generating unnecessary special register
loads (which can allegedly be quite slow).

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
This commit is contained in:
Ilia Mirkin 2015-07-29 11:01:08 -04:00
parent ad75620863
commit 9da9adcfd7
1 changed files with 15 additions and 8 deletions
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23
src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
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@ -1394,6 +1394,8 @@ private:
Value *vtxBase[5]; // base address of vertex in primitive (for TP/GP)
uint8_t vtxBaseValid;
Value *outBase; // base address of vertex out patch (for TCP)
Stack condBBs; // fork BB, then else clause BB
Stack joinBBs; // fork BB, for inserting join ops on ENDIF
Stack loopBBs; // loop headers
@ -1537,13 +1539,7 @@ Converter::getOutputBase(int s)
fetchSrc(tgsi.getSrc(s).getIndirect(1), 0, NULL),
offset);
vtxBaseValid |= 1 << s;
vtxBase[s] = mkOp2v(
OP_ADD, TYPE_U32, getSSA(),
mkOp2v(
OP_SUB, TYPE_U32, getSSA(),
mkOp1v(OP_RDSV, TYPE_U32, getSSA(), mkSysVal(SV_LANEID, 0)),
mkOp1v(OP_RDSV, TYPE_U32, getSSA(), mkSysVal(SV_INVOCATION_ID, 0))),
offset);
vtxBase[s] = mkOp2v(OP_ADD, TYPE_U32, getSSA(), outBase, offset);
}
return vtxBase[s];
}
@ -3369,10 +3365,21 @@ Converter::run()
clipVtx[c] = getScratch();
}
if (prog->getType() == Program::TYPE_FRAGMENT) {
switch (prog->getType()) {
case Program::TYPE_TESSELLATION_CONTROL:
outBase = mkOp2v(
OP_SUB, TYPE_U32, getSSA(),
mkOp1v(OP_RDSV, TYPE_U32, getSSA(), mkSysVal(SV_LANEID, 0)),
mkOp1v(OP_RDSV, TYPE_U32, getSSA(), mkSysVal(SV_INVOCATION_ID, 0)));
break;
case Program::TYPE_FRAGMENT: {
Symbol *sv = mkSysVal(SV_POSITION, 3);
fragCoord[3] = mkOp1v(OP_RDSV, TYPE_F32, getSSA(), sv);
mkOp1(OP_RCP, TYPE_F32, fragCoord[3], fragCoord[3]);
break;
}
default:
break;
}
if (info->io.viewportId >= 0)