diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs_visitor.cpp | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp index 14415bd5c7a..3775e6c4a09 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp @@ -672,6 +672,17 @@ fs_visitor::emit_urb_writes(const fs_reg &gs_vertex_count) length = 0; urb_offset = starting_urb_offset; flush = false; + + /* SSO shaders can have VUE slots allocated which are never actually + * written to, so ignore them when looking for the last (written) slot. + */ + int last_slot = vue_map->num_slots - 1; + while (last_slot > 0 && + (vue_map->slot_to_varying[last_slot] == BRW_VARYING_SLOT_PAD || + outputs[vue_map->slot_to_varying[last_slot]].file == BAD_FILE)) { + last_slot--; + } + for (slot = 0; slot < vue_map->num_slots; slot++) { int varying = vue_map->slot_to_varying[slot]; switch (varying) { @@ -757,8 +768,7 @@ fs_visitor::emit_urb_writes(const fs_reg &gs_vertex_count) * the last slot or if we need to flush (see BAD_FILE varying case * above), emit a URB write send now to flush out the data. */ - int last = slot == vue_map->num_slots - 1; - if (length == 8 || last) + if (length == 8 || slot == last_slot) flush = true; if (flush) { fs_reg *payload_sources = @@ -777,7 +787,7 @@ fs_visitor::emit_urb_writes(const fs_reg &gs_vertex_count) header_size); fs_inst *inst = abld.emit(opcode, reg_undef, payload); - inst->eot = last && stage != MESA_SHADER_GEOMETRY; + inst->eot = slot == last_slot && stage != MESA_SHADER_GEOMETRY; inst->mlen = length + header_size; inst->offset = urb_offset; urb_offset = starting_urb_offset + slot + 1; |