SHADER TARGET 45 = SM 5.0

ScriptableRenderPipeline/Core/ShaderLibrary/Common.hlsl

     return (x < 1.0) ? poly : HALF_PI - poly;
 }
 
-#if (SHADER_TARGET >= 50)
+#if (SHADER_TARGET >= 45)
 uint FastLog2(uint x)
 {
     return firstbithigh(x) - 1u;

ScriptableRenderPipeline/Core/ShaderLibrary/Hammersley.hlsl

 // Ref: http://holger.dammertz.org/stuff/notes_HammersleyOnHemisphere.html
 uint ReverseBits32(uint bits)
 {
-#if (SHADER_TARGET >= 50)
+#if (SHADER_TARGET >= 45)
     return reversebits(bits);
 #else
     bits = (bits << 16) | (bits >> 16);