i965: Subtract instead of adding when computing y delta in new FS backend.

Fixes 7 piglit cases.
2010-09-28 10:18:31 -07:00
parent 5f7bd68149
commit 9e96c737f8
1 changed files with 1 additions and 1 deletions
@@ -1335,7 +1335,7 @@ fs_visitor::emit_interpolation()
   emit(fs_inst(BRW_OPCODE_ADD,
 		this->delta_y,
 		this->pixel_y,
-		fs_reg(brw_vec1_grf(1, 1))));
+		fs_reg(negate(brw_vec1_grf(1, 1)))));

   this->current_annotation = "compute pos.w and 1/pos.w";
   /* Compute wpos.  Unlike many other varying inputs, we usually need it