Added an untested and as of yet unused HDRP include file, just as an expression of what this file will look like for SRPs

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/SGSR2/Shaders/sgsr2_hdrp.hlsl

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+#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
+#include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"
+
+// Using renderSizeRcp here is a bit of a hack, but the SRPs don't offer any macros for gather with offset, and we know which texture the GatherBlue will be used for
+#define GATHER_BLUE_TEXTURE2D_X_OFFSET(textureName, samplerName, coord2, offset)    GATHER_BLUE_TEXTURE2D_X(textureName, samplerName, coord2 + offset * renderSizeRcp)
+
+#define S_POINT_CLAMP       s_point_clamp_sampler
+#define S_LINEAR_CLAMP      s_linear_clamp_sampler
+
+inline float2 decodeVelocityFromTexture(float2 ev)
+{
+    // Nothing much to do, motion vectors are not encoded
+#if UNITY_UV_STARTS_AT_TOP
+    return -ev;
+#else
+    return ev;
+#endif
+}

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/SGSR2/Shaders/sgsr2_hdrp.hlsl.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: ae8ec449c111471fb8eecbd6142cb9ad
+timeCreated: 1734870531