diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp index 478c1c8e556..9738ee368b6 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp @@ -1898,6 +1898,12 @@ vec4_visitor::emit_urb_writes() */ int max_usable_mrf = 13; + /* The following assertion verifies that max_usable_mrf causes an + * even-numbered amount of URB write data, which will meet gen6's + * requirements for length alignment. + */ + assert ((max_usable_mrf - base_mrf) % 2 == 0); + /* FINISHME: edgeflag */ brw_compute_vue_map(&c->vue_map, intel, c->key.nr_userclip, @@ -1917,10 +1923,8 @@ vec4_visitor::emit_urb_writes() for (slot = 0; slot < c->vue_map.num_slots; ++slot) { emit_urb_slot(mrf++, c->vue_map.slot_to_vert_result[slot]); - /* If this was MRF 15, we can't fit anything more into this URB - * WRITE. Note that base_mrf of 1 means that MRF 15 is an - * even-numbered amount of URB write data, which will meet - * gen6's requirements for length alignment. + /* If this was max_usable_mrf, we can't fit anything more into this URB + * WRITE. */ if (mrf > max_usable_mrf) { slot++; |