fast path on not windows

src/main/resources/assets/voxy/shaders/util/prefixsum/inital3.comp

@@ -93,8 +93,8 @@ void main() {
         barrier();
 
 
+        #ifdef IS_WINDOWS
         //hate amd hate amd hate amd hate amd
-
         uint val = warpPrefixSum[gl_LocalInvocationID.x&3u];
 
         subgroupBarrier();
@@ -105,6 +105,14 @@ void main() {
         if (gl_LocalInvocationID.x<4) {
             warpPrefixSum[gl_LocalInvocationID.x] = extraJank;
         }
+        #else
+        if (gl_LocalInvocationID.x<4) {
+            uint val = warpPrefixSum[gl_SubgroupInvocationID];
+            subgroupBarrier();
+            //Use warp to do entire add in 1 reduction
+            warpPrefixSum[gl_SubgroupInvocationID] = subgroupExclusiveAdd(val);
+        }
+        #endif
 
         memoryBarrierShared();
         barrier();