compiler: Make u_decomposed_prims_for_vertices available to CL

For indirect geometry shader setup.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Antonino Maniscalco <antonino.maniscalco@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26056>

src/compiler/shader_enums.h

@@ -1235,6 +1235,57 @@ mesa_vertices_per_prim(enum mesa_prim prim)
    }
 }
 
+/**
+ * Returns the number of decomposed primitives for the given
+ * vertex count.
+ * Parts of the pipline are invoked once for each triangle in
+ * triangle strip, triangle fans and triangles and once
+ * for each line in line strip, line loop, lines. Also 
+ * statistics depend on knowing the exact number of decomposed
+ * primitives for a set of vertices.
+ */
+static inline unsigned
+u_decomposed_prims_for_vertices(enum mesa_prim primitive, int vertices)
+{
+   switch (primitive) {
+   case MESA_PRIM_POINTS:
+      return vertices;
+   case MESA_PRIM_LINES:
+      return vertices / 2;
+   case MESA_PRIM_LINE_LOOP:
+      return (vertices >= 2) ? vertices : 0;
+   case MESA_PRIM_LINE_STRIP:
+      return (vertices >= 2) ? vertices - 1 : 0;
+   case MESA_PRIM_TRIANGLES:
+      return vertices / 3;
+   case MESA_PRIM_TRIANGLE_STRIP:
+      return (vertices >= 3) ? vertices - 2 : 0;
+   case MESA_PRIM_TRIANGLE_FAN:
+      return (vertices >= 3) ? vertices - 2 : 0;
+   case MESA_PRIM_LINES_ADJACENCY:
+      return vertices / 4;
+   case MESA_PRIM_LINE_STRIP_ADJACENCY:
+      return (vertices >= 4) ? vertices - 3 : 0;
+   case MESA_PRIM_TRIANGLES_ADJACENCY:
+      return vertices / 6;
+   case MESA_PRIM_TRIANGLE_STRIP_ADJACENCY:
+      return (vertices >= 6) ? 1 + (vertices - 6) / 2 : 0;
+   case MESA_PRIM_QUADS:
+      return vertices / 4;
+   case MESA_PRIM_QUAD_STRIP:
+      return (vertices >= 4) ? (vertices - 2) / 2 : 0;
+   /* Polygons can't be decomposed
+    * because the number of their vertices isn't known so
+    * for them and whatever else we don't recognize just
+    * return 1 if the number of vertices is greater than
+    * or equal to 3 and zero otherwise */
+   case MESA_PRIM_POLYGON:
+   default:
+      debug_printf("Invalid decomposition primitive!\n");
+      return (vertices >= 3) ? 1 : 0;
+   }
+}
+
 /**
  * A compare function enum for use in compiler lowering passes.  This is in
  * the same order as GL's compare functions (shifted down by GL_NEVER), and is

src/gallium/auxiliary/util/u_prim.h

@@ -182,57 +182,6 @@ u_trim_pipe_prim(enum mesa_prim pipe_prim, unsigned *nr)
 }
 
 
-/**
- * Returns the number of decomposed primitives for the given
- * vertex count.
- * Parts of the pipline are invoked once for each triangle in
- * triangle strip, triangle fans and triangles and once
- * for each line in line strip, line loop, lines. Also 
- * statistics depend on knowing the exact number of decomposed
- * primitives for a set of vertices.
- */
-static inline unsigned
-u_decomposed_prims_for_vertices(enum mesa_prim primitive, int vertices)
-{
-   switch (primitive) {
-   case MESA_PRIM_POINTS:
-      return vertices;
-   case MESA_PRIM_LINES:
-      return vertices / 2;
-   case MESA_PRIM_LINE_LOOP:
-      return (vertices >= 2) ? vertices : 0;
-   case MESA_PRIM_LINE_STRIP:
-      return (vertices >= 2) ? vertices - 1 : 0;
-   case MESA_PRIM_TRIANGLES:
-      return vertices / 3;
-   case MESA_PRIM_TRIANGLE_STRIP:
-      return (vertices >= 3) ? vertices - 2 : 0;
-   case MESA_PRIM_TRIANGLE_FAN:
-      return (vertices >= 3) ? vertices - 2 : 0;
-   case MESA_PRIM_LINES_ADJACENCY:
-      return vertices / 4;
-   case MESA_PRIM_LINE_STRIP_ADJACENCY:
-      return (vertices >= 4) ? vertices - 3 : 0;
-   case MESA_PRIM_TRIANGLES_ADJACENCY:
-      return vertices / 6;
-   case MESA_PRIM_TRIANGLE_STRIP_ADJACENCY:
-      return (vertices >= 6) ? 1 + (vertices - 6) / 2 : 0;
-   case MESA_PRIM_QUADS:
-      return vertices / 4;
-   case MESA_PRIM_QUAD_STRIP:
-      return (vertices >= 4) ? (vertices - 2) / 2 : 0;
-   /* Polygons can't be decomposed
-    * because the number of their vertices isn't known so
-    * for them and whatever else we don't recognize just
-    * return 1 if the number of vertices is greater than
-    * or equal to 3 and zero otherwise */
-   case MESA_PRIM_POLYGON:
-   default:
-      debug_printf("Invalid decomposition primitive!\n");
-      return (vertices >= 3) ? 1 : 0;
-   }
-}
-
 /**
  * Returns the number of reduced/tessellated primitives for the given vertex
  * count.  Each quad is treated as two triangles.  Polygons are treated as