From: Eric Anholt <eric@anholt.net>
Date: Sat, 27 Aug 2011 18:07:05 +0000 (-0700)
Subject: i965/vs: Convert gen6 userclip handling to new generators.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ead7ffc62a99c83c3f41a3f229cfbb9ed1826df0;p=mesa.git

i965/vs: Convert gen6 userclip handling to new generators.

This DP4 had one of its operands missing, so we were generating
garbage clip distances.  Using the per-opcode instruction generators
made it obvious.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---

diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
index d41c1e6039a..3569e3ea14d 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
@@ -1858,9 +1858,9 @@ vec4_visitor::emit_vue_header_gen6(int header_mrf)
 	 else
 	    m = brw_message_reg(header_mrf + 1);
 
-	 emit(BRW_OPCODE_DP4,
-	      dst_reg(brw_writemask(m, 1 << (i & 3))),
-	      src_reg(c->userplane[i]));
+	 emit(DP4(dst_reg(brw_writemask(m, 1 << (i & 3))),
+		  src_reg(output_reg[VERT_RESULT_HPOS]),
+		  src_reg(c->userplane[i])));
       }
       header_mrf += 2;
    }