From 04c459fc8d99b41fa8a03c49523599e9bf797f9d Mon Sep 17 00:00:00 2001
From: FernandoS27 <fsahmkow27@gmail.com>
Date: Sat, 17 Apr 2021 11:56:45 +0200
Subject: shader: Implement fine derivates constant propagation

---
 src/shader_recompiler/backend/spirv/emit_spirv.cpp      | 3 +++
 src/shader_recompiler/backend/spirv/emit_spirv.h        | 4 ++++
 src/shader_recompiler/backend/spirv/emit_spirv_warp.cpp | 8 ++++++++
 3 files changed, 15 insertions(+)

(limited to 'src/shader_recompiler/backend')

diff --git a/src/shader_recompiler/backend/spirv/emit_spirv.cpp b/src/shader_recompiler/backend/spirv/emit_spirv.cpp
index 9ec970706..c4d5874ca 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv.cpp
@@ -341,6 +341,9 @@ void SetupCapabilities(const Profile& profile, const Info& info, EmitContext& ct
     if (!ctx.profile.xfb_varyings.empty()) {
         ctx.AddCapability(spv::Capability::TransformFeedback);
     }
+    if (info.uses_derivates) {
+        ctx.AddCapability(spv::Capability::DerivativeControl);
+    }
     // TODO: Track this usage
     ctx.AddCapability(spv::Capability::ImageGatherExtended);
     ctx.AddCapability(spv::Capability::ImageQuery);
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv.h b/src/shader_recompiler/backend/spirv/emit_spirv.h
index 7949d08d0..dec4f434a 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv.h
+++ b/src/shader_recompiler/backend/spirv/emit_spirv.h
@@ -529,4 +529,8 @@ Id EmitShuffleButterfly(EmitContext& ctx, IR::Inst* inst, Id value, Id index, Id
                         Id segmentation_mask);
 Id EmitFSwizzleAdd(EmitContext& ctx, Id op_a, Id op_b, Id swizzle);
 
+Id EmitDPdxFine(EmitContext& ctx, Id op_a);
+
+Id EmitDPdyFine(EmitContext& ctx, Id op_a);
+
 } // namespace Shader::Backend::SPIRV
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_warp.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_warp.cpp
index 1c23ccc08..d53412204 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_warp.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_warp.cpp
@@ -183,4 +183,12 @@ Id EmitFSwizzleAdd(EmitContext& ctx, Id op_a, Id op_b, Id swizzle) {
     return ctx.OpFAdd(ctx.F32[1], result_a, result_b);
 }
 
+Id EmitDPdxFine(EmitContext& ctx, Id op_a) {
+    return ctx.OpDPdxFine(ctx.F32[1], op_a);
+}
+
+Id EmitDPdyFine(EmitContext& ctx, Id op_a) {
+    return ctx.OpDPdyFine(ctx.F32[1], op_a);
+}
+
 } // namespace Shader::Backend::SPIRV
-- 
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