Added Legacy variants of the ASR shaders, without DXC, Native16Bit or wave operations. Separated them into an AsrShaderBundle that can be selected from at run-time based on the current graphics device.

Packages/com.unity.postprocessing@3.2.2/PostProcessing/PostProcessResources.asset

@@ -160,6 +160,11 @@ MonoBehaviour:
         activate: {fileID: 7200000, guid: d7de362950af6fe4e90da7d6e32f9826, type: 3}
         upscale: {fileID: 7200000, guid: 5d28d29787492b74aa736a21f70572c7, type: 3}
   asrUpscalerShaders:
+    legacyShaders:
+      fragmentShader: {fileID: 4800000, guid: 42e5314e46109a441a4527349d8df6e4, type: 3}
+      computeLuminancePyramidPass: {fileID: 7200000, guid: 41d0c3a77d97a904e96ebc2bf18129f6, type: 3}
+      lockPass: {fileID: 7200000, guid: a09277df48840a84196b3bac299544ea, type: 3}
+    modernShaders:
       fragmentShader: {fileID: 4800000, guid: 147cc2cffac69ef4eb3ea8addafc9d10, type: 3}
       computeLuminancePyramidPass: {fileID: 7200000, guid: 57220d870cb441c8a6df8a9e15a74283, type: 3}
       lockPass: {fileID: 7200000, guid: a6e1d5d5372d467790fcf2d089b50ef7, type: 3}

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/ASR/Runtime/Asr.cs

@@ -33,7 +33,7 @@ namespace ArmASR
         /// <summary>
         /// Creates a new ASR context with standard parameters that are appropriate for the current platform. 
         /// </summary>
-        public static AsrContext CreateContext(Variant variant, Vector2Int displaySize, Vector2Int maxRenderSize, AsrShaders shaders, InitializationFlags flags = 0)
+        public static AsrContext CreateContext(Variant variant, Vector2Int displaySize, Vector2Int maxRenderSize, AsrShaderBundle shaders, InitializationFlags flags = 0)
         {
             if (SystemInfo.usesReversedZBuffer)
                 flags |= InitializationFlags.EnableDepthInverted;
@@ -52,7 +52,7 @@ namespace ArmASR
                 Variant = variant,
                 DisplaySize = displaySize,
                 MaxRenderSize = maxRenderSize,
-                Shaders = shaders,
+                Shaders = shaders.GetShadersForCurrentPlatform(),
             };
             
             var context = new AsrContext();

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/ASR/Runtime/AsrAssets.cs

@@ -19,6 +19,7 @@
 // THE SOFTWARE.
 
 using UnityEngine;
+using UnityEngine.Rendering;
 
 namespace ArmASR
 {
@@ -29,16 +30,25 @@ namespace ArmASR
     [CreateAssetMenu(fileName = "ASR Assets", menuName = "ARM/ASR Assets", order = 1102)]
     public class AsrAssets : ScriptableObject
     {
-        public AsrShaders shaders;
+        public AsrShaderBundle shaderBundle;
         
 #if UNITY_EDITOR
         private void Reset()
         {
-            shaders = new AsrShaders
+            shaderBundle = new AsrShaderBundle
             {
-                fragmentShader = FindFragmentShader("ffxm_fsr2_fs"),
-                computeLuminancePyramidPass = FindComputeShader("ffxm_fsr2_compute_luminance_pyramid_pass"),
-                lockPass = FindComputeShader("ffxm_fsr2_lock_pass"),
+                legacyShaders = new AsrShaders
+                {
+                    fragmentShader = FindFragmentShader("ffxm_fsr2_fragment_legacy"),
+                    computeLuminancePyramidPass = FindComputeShader("ffxm_fsr2_luma_pyramid_legacy"),
+                    lockPass = FindComputeShader("ffxm_fsr2_lock_legacy"),
+                },
+                modernShaders = new AsrShaders
+                {
+                    fragmentShader = FindFragmentShader("ffxm_fsr2_fragment_modern"),
+                    computeLuminancePyramidPass = FindComputeShader("ffxm_fsr2_luma_pyramid_modern"),
+                    lockPass = FindComputeShader("ffxm_fsr2_lock_modern"),
+                },
             };
         }
 
@@ -64,6 +74,30 @@ namespace ArmASR
 #endif
     }
 
+    [System.Serializable]
+    public class AsrShaderBundle
+    {
+        public AsrShaders legacyShaders;
+
+        public AsrShaders modernShaders;
+        
+        public AsrShaders GetShadersForCurrentPlatform()
+        {
+            switch (SystemInfo.graphicsDeviceType)
+            {
+                case GraphicsDeviceType.Direct3D12:
+                case GraphicsDeviceType.Vulkan:
+                case GraphicsDeviceType.Metal:
+                case GraphicsDeviceType.PlayStation5:
+                case GraphicsDeviceType.PlayStation5NGGC:
+                case GraphicsDeviceType.GameCoreXboxSeries:
+                    return modernShaders;
+                default:
+                    return legacyShaders;
+            }
+        }
+    }
+    
     /// <summary>
     /// All the compute shaders used by ASR.
     /// </summary>

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/ASR/Shaders/ffxm_fsr2_fragment_legacy.shader

@@ -0,0 +1,122 @@
+Shader "TND/ASR/ffxm_fsr2_fragment_legacy"
+{
+    SubShader
+    {
+        Cull Off ZWrite Off ZTest Always
+
+        Pass    // 0
+        {
+            Name "Auto-Generate Reactive Mask"
+            
+            HLSLPROGRAM
+            #pragma vertex VertMain
+            #pragma fragment main
+            #pragma target 4.5
+            //#pragma enable_d3d11_debug_symbols
+            
+            #pragma multi_compile __ FFXM_HALF
+            #pragma multi_compile __ UNITY_FFXM_TEXTURE2D_X_ARRAY
+
+            #include "ffxm_fsr2_common.cginc"
+            #include "shaders/ffxm_fsr2_vs.hlsl"
+            #include "shaders/ffxm_fsr2_autogen_reactive_pass_fs.hlsl"
+            
+            ENDHLSL
+        }
+
+        Pass    // 1
+        {
+            Name "Reconstruct Previous Depth"
+            
+            HLSLPROGRAM
+            #pragma vertex VertMain
+            #pragma fragment main
+            #pragma target 4.5
+            //#pragma enable_d3d11_debug_symbols
+
+            #pragma multi_compile __ FFXM_HALF
+            #pragma multi_compile __ FFXM_FSR2_OPTION_HDR_COLOR_INPUT
+            #pragma multi_compile __ FFXM_FSR2_OPTION_LOW_RESOLUTION_MOTION_VECTORS
+            #pragma multi_compile __ FFXM_FSR2_OPTION_JITTERED_MOTION_VECTORS
+            #pragma multi_compile __ FFXM_FSR2_OPTION_INVERTED_DEPTH
+            #pragma multi_compile __ UNITY_FFXM_TEXTURE2D_X_ARRAY
+
+            #include "ffxm_fsr2_common.cginc"
+            #include "shaders/ffxm_fsr2_vs.hlsl"
+            #include "shaders/ffxm_fsr2_reconstruct_previous_depth_pass_fs.hlsl"
+            
+            ENDHLSL
+        }
+
+        Pass    // 2
+        {
+            Name "Depth Clip"
+            
+            HLSLPROGRAM
+            #pragma vertex VertMain
+            #pragma fragment main
+            #pragma target 4.5
+            //#pragma enable_d3d11_debug_symbols
+
+            #pragma multi_compile __ FFXM_HALF
+            #pragma multi_compile __ FFXM_FSR2_OPTION_SHADER_OPT_BALANCED
+            #pragma multi_compile __ FFXM_FSR2_OPTION_SHADER_OPT_PERFORMANCE
+            #pragma multi_compile __ FFXM_FSR2_OPTION_LOW_RESOLUTION_MOTION_VECTORS
+            #pragma multi_compile __ FFXM_FSR2_OPTION_JITTERED_MOTION_VECTORS
+            #pragma multi_compile __ FFXM_FSR2_OPTION_INVERTED_DEPTH
+            #pragma multi_compile __ UNITY_FFXM_TEXTURE2D_X_ARRAY
+            
+            #include "ffxm_fsr2_common.cginc"
+            #include "shaders/ffxm_fsr2_vs.hlsl"
+            #include "shaders/ffxm_fsr2_depth_clip_pass_fs.hlsl"
+            
+            ENDHLSL
+        }
+
+        Pass    // 3
+        {
+            Name "Accumulate"
+            
+            HLSLPROGRAM
+            #pragma vertex VertMain
+            #pragma fragment main
+            #pragma target 4.5
+            //#pragma enable_d3d11_debug_symbols
+
+            #pragma multi_compile __ FFXM_HALF
+            #pragma multi_compile __ FFXM_FSR2_OPTION_SHADER_OPT_BALANCED
+            #pragma multi_compile __ FFXM_FSR2_OPTION_SHADER_OPT_PERFORMANCE
+            #pragma multi_compile __ FFXM_FSR2_OPTION_REPROJECT_USE_LANCZOS_TYPE
+            #pragma multi_compile __ FFXM_FSR2_OPTION_HDR_COLOR_INPUT
+            #pragma multi_compile __ FFXM_FSR2_OPTION_LOW_RESOLUTION_MOTION_VECTORS
+            #pragma multi_compile __ FFXM_FSR2_OPTION_JITTERED_MOTION_VECTORS
+            #pragma multi_compile __ FFXM_FSR2_OPTION_APPLY_SHARPENING
+            #pragma multi_compile __ UNITY_FFXM_TEXTURE2D_X_ARRAY
+
+            #include "ffxm_fsr2_common.cginc"
+            #include "shaders/ffxm_fsr2_vs.hlsl"
+            #include "shaders/ffxm_fsr2_accumulate_pass_fs.hlsl"
+            
+            ENDHLSL
+        }
+
+        Pass    // 4
+        {
+            Name "Sharpen"
+            
+            HLSLPROGRAM
+            #pragma vertex VertMain
+            #pragma fragment main
+            #pragma target 4.5
+            //#pragma enable_d3d11_debug_symbols
+
+            #pragma multi_compile __ UNITY_FFXM_TEXTURE2D_X_ARRAY
+
+            #include "ffxm_fsr2_common.cginc"
+            #include "shaders/ffxm_fsr2_vs.hlsl"
+            #include "shaders/ffxm_fsr2_rcas_pass_fs.hlsl"
+            
+            ENDHLSL
+        }
+    }
+}

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/ASR/Shaders/ffxm_fsr2_fragment_legacy.shader.meta

@@ -0,0 +1,9 @@
+fileFormatVersion: 2
+guid: 42e5314e46109a441a4527349d8df6e4
+ShaderImporter:
+  externalObjects: {}
+  defaultTextures: []
+  nonModifiableTextures: []
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/ASR/Shaders/ffxm_fsr2_fragment_modern.shader

@@ -134,4 +134,6 @@ Shader "TND/ASR/ffxm_fsr2_fragment_modern"
             ENDHLSL
         }
     }
+
+    Fallback "TND/ASR/ffxm_fsr2_fragment_legacy"
 }

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/ASR/Shaders/ffxm_fsr2_lock_legacy.compute

@@ -0,0 +1,12 @@
+#pragma kernel main
+
+#pragma multi_compile __ FFXM_HALF
+#pragma multi_compile __ FFXM_FSR2_OPTION_LOW_RESOLUTION_MOTION_VECTORS
+#pragma multi_compile __ FFXM_FSR2_OPTION_JITTERED_MOTION_VECTORS
+#pragma multi_compile __ FFXM_FSR2_OPTION_INVERTED_DEPTH
+
+#pragma multi_compile __ UNITY_FFXM_TEXTURE2D_X_ARRAY
+
+#include "ffxm_fsr2_common.cginc"
+
+#include "shaders/ffxm_fsr2_lock_pass.hlsl"

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/ASR/Shaders/ffxm_fsr2_lock_legacy.compute.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: a09277df48840a84196b3bac299544ea
+timeCreated: 1742417134

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/ASR/Shaders/ffxm_fsr2_luma_pyramid_legacy.compute

@@ -0,0 +1,15 @@
+#pragma kernel main
+
+#pragma multi_compile __ FFXM_HALF
+#pragma multi_compile __ FFXM_FSR2_OPTION_LOW_RESOLUTION_MOTION_VECTORS
+#pragma multi_compile __ FFXM_FSR2_OPTION_JITTERED_MOTION_VECTORS
+#pragma multi_compile __ FFXM_FSR2_OPTION_INVERTED_DEPTH
+
+#pragma multi_compile __ UNITY_FFXM_TEXTURE2D_X_ARRAY
+
+#include "ffxm_fsr2_common.cginc"
+
+// Disable wave operations altogether
+#define FFXM_SPD_NO_WAVE_OPERATIONS
+
+#include "shaders/ffxm_fsr2_compute_luminance_pyramid_pass.hlsl"

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/ASR/Shaders/ffxm_fsr2_luma_pyramid_legacy.compute.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 41d0c3a77d97a904e96ebc2bf18129f6
+timeCreated: 1742416757

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/PostProcessResources.cs

@@ -297,7 +297,7 @@ namespace UnityEngine.Rendering.PostProcessing
         /// <summary>
         /// Shaders used by the Arm Accuracy Super Resolution (ASR) Upscaler.
         /// </summary>
-        public AsrShaders asrUpscalerShaders;
+        public AsrShaderBundle asrUpscalerShaders;
 
 #if UNITY_EDITOR
         /// <summary>