[GPU] Mostly generic, not square-only resolution scaling

src/xenia/gpu/shaders/resolve_clear_64bpp.cs.hlsl

@@ -1,28 +1 @@
-#define XE_RESOLVE_CLEAR
-#include "resolve.hlsli"
-
-RWBuffer<uint4> xe_resolve_dest : register(u0);
-
-[numthreads(8, 8, 1)]
-void main(uint3 xe_thread_id : SV_DispatchThreadID) {
-  // 1 thread = 8 samples (same as resolve granularity).
-  uint2 extent_scale =
-      uint2(XeResolveEdramMsaaSamples() >= uint2(kXenosMsaaSamples_4X,
-                                                 kXenosMsaaSamples_2X));
-  // Group height is the same as resolve granularity, Y overflow check not
-  // needed.
-  [branch] if (xe_thread_id.x >= (XeResolveSizeDiv8().x << extent_scale.x)) {
-    return;
-  }
-  uint address_int4s =
-      XeEdramOffsetInts(
-          (xe_thread_id.xy << uint2(3u, 0u)) +
-              (XeResolveOffset() << extent_scale),
-          XeResolveEdramBaseTiles(), XeResolveEdramPitchTiles(),
-          kXenosMsaaSamples_1X, false, 1u)
-      >> 2u;
-  uint i;
-  [unroll] for (i = 0u; i < 4u; ++i) {
-    xe_resolve_dest[address_int4s + i] = xe_resolve_clear_value.xyxy;
-  }
-}
+#include "resolve_clear_64bpp.hlsli"