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swr: [rasterizer jitter] add instancing to non-gather fetch path 

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>
This commit is contained in:
Tim Rowley 2016-05-11 09:57:08 -06:00
parent 63d7ed835a
commit 6d212cccf0
1 changed files with 37 additions and 5 deletions
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42
src/gallium/drivers/swr/rasterizer/jitter/fetch_jit.cpp
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@ -246,6 +246,10 @@ void FetchJit::JitLoadVertices(const FETCH_COMPILE_STATE &fetchState, Value* fet
Constant* uwvec = UndefValue::get(VectorType::get(mFP32Ty, 4));
Value* startVertex = LOAD(fetchInfo, {0, SWR_FETCH_CONTEXT_StartVertex});
Value* startInstance = LOAD(fetchInfo, {0, SWR_FETCH_CONTEXT_StartInstance});
Value* curInstance = LOAD(fetchInfo, {0, SWR_FETCH_CONTEXT_CurInstance});
Value* vBaseVertex = VBROADCAST(LOAD(fetchInfo, {0, SWR_FETCH_CONTEXT_BaseVertex}));
curInstance->setName("curInstance");
for(uint32_t nelt = 0; nelt < fetchState.numAttribs; ++nelt)
{
@ -258,24 +262,52 @@ void FetchJit::JitLoadVertices(const FETCH_COMPILE_STATE &fetchState, Value* fet
vectors.clear();
Value *vCurIndices;
Value *startOffset;
if(ied.InstanceEnable)
{
Value* stepRate = C(ied.InstanceDataStepRate);
// prevent a div by 0 for 0 step rate
Value* isNonZeroStep = ICMP_UGT(stepRate, C(0));
stepRate = SELECT(isNonZeroStep, stepRate, C(1));
// calc the current offset into instanced data buffer
Value* calcInstance = UDIV(curInstance, stepRate);
// if step rate is 0, every instance gets instance 0
calcInstance = SELECT(isNonZeroStep, calcInstance, C(0));
vCurIndices = VBROADCAST(calcInstance);
startOffset = startInstance;
}
else
{
// offset indices by baseVertex
vCurIndices = ADD(vIndices, vBaseVertex);
startOffset = startVertex;
}
// load SWR_VERTEX_BUFFER_STATE::pData
Value *stream = LOAD(streams, {ied.StreamIndex, 2});
Value *stream = LOAD(streams, {ied.StreamIndex, SWR_VERTEX_BUFFER_STATE_pData});
// load SWR_VERTEX_BUFFER_STATE::pitch
Value *stride = LOAD(streams, {ied.StreamIndex, 1});
Value *stride = LOAD(streams, {ied.StreamIndex, SWR_VERTEX_BUFFER_STATE_pitch});
stride = Z_EXT(stride, mInt64Ty);
// load SWR_VERTEX_BUFFER_STATE::size
Value *size = LOAD(streams, {ied.StreamIndex, 3});
Value *size = LOAD(streams, {ied.StreamIndex, SWR_VERTEX_BUFFER_STATE_size});
size = Z_EXT(size, mInt64Ty);
Value* startVertexOffset = MUL(Z_EXT(startVertex, mInt64Ty), stride);
Value* startVertexOffset = MUL(Z_EXT(startOffset, mInt64Ty), stride);
// Load from the stream.
for(uint32_t lane = 0; lane < mVWidth; ++lane)
{
// Get index
Value* index = VEXTRACT(vIndices, C(lane));
Value* index = VEXTRACT(vCurIndices, C(lane));
index = Z_EXT(index, mInt64Ty);
Value* offset = MUL(index, stride);