intel/blorp: Allow BLORP calls to be predicated

Signed-off-by: Nanley Chery <nanley.g.chery@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/intel/blorp/blorp.h

@@ -75,6 +75,9 @@ enum blorp_batch_flags {
     * hardware.
     */
    BLORP_BATCH_NO_EMIT_DEPTH_STENCIL = (1 << 0),
+
+   /* This flag indicates that the blorp call should be predicated. */
+   BLORP_BATCH_PREDICATE_ENABLE      = (1 << 1),
 };
 
 struct blorp_batch {

src/intel/blorp/blorp_genX_exec.h

@@ -1543,6 +1543,9 @@ blorp_exec(struct blorp_batch *batch, const struct blorp_params *params)
    blorp_emit(batch, GENX(3DPRIMITIVE), prim) {
       prim.VertexAccessType = SEQUENTIAL;
       prim.PrimitiveTopologyType = _3DPRIM_RECTLIST;
+#if GEN_GEN >= 7
+      prim.PredicateEnable = batch->flags & BLORP_BATCH_PREDICATE_ENABLE;
+#endif
       prim.VertexCountPerInstance = 3;
       prim.InstanceCount = params->num_layers;
    }