[Mesa-dev] [PATCH v3 30/30] nvir/nir: implement load_per_vertex_output

[Karol Herbst]

Signed-off-by: Karol Herbst <kherbst at redhat.com>
---
 .../drivers/nouveau/codegen/nv50_ir_from_nir.cpp   | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_nir.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_nir.cpp
index 08490a39e9..c40fdae1a1 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_nir.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_nir.cpp
@@ -1768,6 +1768,36 @@ Converter::visit(nir_intrinsic_instr *insn)
       }
       break;
    }
+   case nir_intrinsic_load_per_vertex_output: {
+      const DataType dType = getDType(insn);
+      LValues &newDefs = convert(&insn->dest);
+      Value *indirectVertex;
+      Value *indirectOffset;
+      auto baseVertex = getIndirect(&insn->src[0], 0, &indirectVertex);
+      auto baseOffset = getIndirect(&insn->src[1], 0, &indirectOffset);
+
+      auto idx = nir_intrinsic_base(insn) + baseOffset;
+      Value *vtxBase = nullptr;
+
+      if (indirectVertex)
+         vtxBase = indirectVertex;
+      else
+         vtxBase = loadImm(nullptr, baseVertex);
+
+      if (indirectOffset)
+         indirectOffset = mkOp2v(OP_SHL, TYPE_U32, getSSA(4, FILE_ADDRESS), indirectOffset, mkImm(4));
+
+      vtxBase = mkOp2v(OP_ADD, TYPE_U32, getSSA(4, FILE_ADDRESS), outBase, vtxBase);
+
+      for (auto i = 0u; i < insn->num_components; ++i) {
+         uint32_t address = info->out[idx].slot[nir_intrinsic_component(insn) + i] * 4;
+         Symbol *sym = mkSymbol(FILE_SHADER_OUTPUT, 0, dType, address);
+         Instruction *ld = mkLoad(dType, newDefs[i], sym, indirectOffset);
+         ld->setIndirect(0, 1, vtxBase);
+         ld->perPatch = info->in[idx].patch;
+      }
+      break;
+   }
    case nir_intrinsic_emit_vertex:
    case nir_intrinsic_end_primitive: {
       auto idx = nir_intrinsic_stream_id(insn);
-- 
2.14.3