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shader: assemble point inputs for merged geometry shaders

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This commit is contained in:
nmzik
2026-09-07 05:04:15 +04:00
parent f880c58ccc
commit 1fd07c2c83
4 changed files with 33 additions and 10 deletions
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src/graphics/shader/recompiler/frontend/translate/Translate.cpp
+12 -5
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@@ -1082,13 +1082,14 @@ IR::Program TranslateProgram(const Decoder::Program& decoded, const CFG::Graph&
const auto primitive_chunk = entry_ir.IMul(builtin(IR::StageInputKind::WorkgroupId, 0),
u32(mesh.primitives_per_group));
const auto step = u32(mesh.InputPrimitiveStep());
const auto size = u32(mesh.InputPrimitiveSize());
const auto chunk = entry_ir.IMul(primitive_chunk, step);
const auto vertices =
minimum(subtract_saturate(draw(0), chunk), u32(mesh.vertices_per_group));
const auto primitives = entry_ir.Select(
entry_ir.ULessThan(vertices, u32(3)), u32(0),
entry_ir.ULessThan(vertices, size), u32(0),
entry_ir.IAdd(IR::U32(entry_ir.Emit(IR::ValueOpcode::UDiv32,
{subtract_saturate(vertices, u32(3)), step})),
{subtract_saturate(vertices, size), step})),
u32(1)));
const auto wave = entry_ir.ShiftRightLogical(local, u32(6));
const auto wave_base = entry_ir.BitwiseAnd(local, u32(~63u));
@@ -1103,17 +1104,23 @@ IR::Program TranslateProgram(const Decoder::Program& decoded, const CFG::Graph&
vertex_count)));
// GS adjacency addresses local ES records in LDS. Strip winding alternates
// with the global primitive number, including across subgroup boundaries.
const auto parity = mesh.InputPrimitiveStep() == 1u
const auto parity = mesh.input_primitive ==
static_cast<uint32_t>(Prospero::PrimitiveType::kTriStrip)
? entry_ir.BitwiseAnd(entry_ir.IAdd(primitive_chunk, local), u32(1))
: u32(0);
const auto vertex = entry_ir.IMul(local, step);
const auto first = entry_ir.IAdd(vertex, parity);
const auto second = entry_ir.ISub(entry_ir.IAdd(vertex, u32(1)), parity);
const auto second = mesh.InputPrimitiveSize() == 3u
? entry_ir.ISub(entry_ir.IAdd(vertex, u32(1)), parity)
: u32(0);
const auto third = mesh.InputPrimitiveSize() == 3u
? entry_ir.IAdd(vertex, u32(2))
: u32(0);
entry_ir.SetVectorReg(static_cast<IR::VectorReg>(0),
entry_ir.BitwiseOr(entry_ir.ShiftLeftLogical(first, u32(2)),
entry_ir.ShiftLeftLogical(second, u32(18))));
entry_ir.SetVectorReg(static_cast<IR::VectorReg>(1),
entry_ir.ShiftLeftLogical(entry_ir.IAdd(vertex, u32(2)), u32(2)));
entry_ir.ShiftLeftLogical(third, u32(2)));
const auto input_vertex = entry_ir.IAdd(chunk, local);
const auto index_bytes = draw(3);
const auto indexed = entry_ir.INotEqual(index_bytes, u32(0));