From 14ac0c2923c41df9c6fc4833d2a8e46a6efe5b59 Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Fri, 24 Dec 2021 20:00:28 -0500
Subject: shader: Add integer attribute get optimization pass
Works around an nvidia driver bug, where casting the integer attributes to float and back to an integer always returned 0.
---
.../backend/glsl/emit_glsl_context_get_set.cpp | 16 ++++++++++++++++
.../backend/glsl/emit_glsl_instructions.h | 2 ++
2 files changed, 18 insertions(+)
(limited to 'src/shader_recompiler/backend/glsl')
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
index 6477bd1928..5ef46d6343 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
@@ -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)) {
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h b/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h
index f86502e4c8..6cabbc717d 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h
@@ -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,
--
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