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i965/vs: Do VUE writes using the MRF file instead of hardware register. 

We'll only do compute-to-MRF on accesses to this file.
This commit is contained in:
Eric Anholt 2011-09-06 12:32:33 -07:00
parent 65d46c96c2
commit 0502db1eab
1 changed files with 6 additions and 4 deletions
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10
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
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@ -1831,13 +1831,15 @@ vec4_visitor::emit_clip_distances(struct brw_reg reg, int offset)
void
vec4_visitor::emit_urb_slot(int mrf, int vert_result)
{
struct brw_reg reg = brw_message_reg(mrf);
struct brw_reg hw_reg = brw_message_reg(mrf);
dst_reg reg = dst_reg(MRF, mrf);
reg.type = BRW_REGISTER_TYPE_F;
switch (vert_result) {
case VERT_RESULT_PSIZ:
/* PSIZ is always in slot 0, and is coupled with other flags. */
current_annotation = "indices, point width, clip flags";
emit_psiz_and_flags(reg);
emit_psiz_and_flags(hw_reg);
break;
case BRW_VERT_RESULT_NDC:
current_annotation = "NDC";
@ -1850,11 +1852,11 @@ vec4_visitor::emit_urb_slot(int mrf, int vert_result)
break;
case BRW_VERT_RESULT_CLIP0:
current_annotation = "user clip distances";
emit_clip_distances(reg, 0);
emit_clip_distances(hw_reg, 0);
break;
case BRW_VERT_RESULT_CLIP1:
current_annotation = "user clip distances";
emit_clip_distances(reg, 4);
emit_clip_distances(hw_reg, 4);
break;
case BRW_VERT_RESULT_PAD:
/* No need to write to this slot */