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shader: Add integer attribute get optimization pass

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Works around an nvidia driver bug, where casting the integer attributes to float and back to an integer always returned 0.
This commit is contained in:
ameerj 2021-12-24 20:00:28 -05:00
parent fbb33df96f
commit 22a4d26479
9 changed files with 86 additions and 0 deletions
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16
src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
View file

@ -221,6 +221,22 @@ void EmitGetAttribute(EmitContext& ctx, IR::Inst& inst, IR::Attribute attr,
}
}
void EmitGetAttributeU32(EmitContext& ctx, IR::Inst& inst, IR::Attribute attr, std::string_view) {
switch (attr) {
case IR::Attribute::PrimitiveId:
ctx.AddU32("{}=uint(gl_PrimitiveID);", inst);
break;
case IR::Attribute::InstanceId:
ctx.AddU32("{}=uint(gl_InstanceID);", inst);
break;
case IR::Attribute::VertexId:
ctx.AddU32("{}=uint(gl_VertexID);", inst);
break;
default:
throw NotImplementedException("Get U32 attribute {}", attr);
}
}
void EmitSetAttribute(EmitContext& ctx, IR::Attribute attr, std::string_view value,
[[maybe_unused]] std::string_view vertex) {
if (IR::IsGeneric(attr)) {

2
src/shader_recompiler/backend/glsl/emit_glsl_instructions.h
View file

@ -60,6 +60,8 @@ void EmitGetCbufU32x2(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding
const IR::Value& offset);
void EmitGetAttribute(EmitContext& ctx, IR::Inst& inst, IR::Attribute attr,
std::string_view vertex);
void EmitGetAttributeU32(EmitContext& ctx, IR::Inst& inst, IR::Attribute attr,
std::string_view vertex);
void EmitSetAttribute(EmitContext& ctx, IR::Attribute attr, std::string_view value,
std::string_view vertex);
void EmitGetAttributeIndexed(EmitContext& ctx, IR::Inst& inst, std::string_view offset,