SPIR-V: Only allow implicit LOD sampling on fragment (#5026)

src/Ryujinx.Graphics.Gpu/Shader/DiskCache/DiskCacheHostStorage.cs

@@ -22,7 +22,7 @@ namespace Ryujinx.Graphics.Gpu.Shader.DiskCache
         private const ushort FileFormatVersionMajor = 1;
         private const ushort FileFormatVersionMinor = 2;
         private const uint FileFormatVersionPacked = ((uint)FileFormatVersionMajor << 16) | FileFormatVersionMinor;
-        private const uint CodeGenVersion = 4578;
+        private const uint CodeGenVersion = 5027;
 
         private const string SharedTocFileName = "shared.toc";
         private const string SharedDataFileName = "shared.data";

src/Ryujinx.Graphics.Shader/CodeGen/Spirv/Instructions.cs

@@ -1623,7 +1623,19 @@ namespace Ryujinx.Graphics.Shader.CodeGen.Spirv
 
             if (hasLodBias)
             {
-               lodBias = Src(AggregateType.FP32);
+                lodBias = Src(AggregateType.FP32);
+            }
+
+            if (!isGather && !intCoords && !isMultisample && !hasLodLevel && !hasDerivatives && context.Config.Stage != ShaderStage.Fragment)
+            {
+                // Implicit LOD is only valid on fragment.
+                // Use the LOD bias as explicit LOD if available.
+
+                lod = lodBias ?? context.Constant(context.TypeFP32(), 0f);
+
+                lodBias = null;
+                hasLodBias = false;
+                hasLodLevel = true;
             }
 
             SpvInstruction compIdx = null;