From: Matt Turner <mattst88@gmail.com>
Date: Thu, 28 Jul 2016 21:41:17 +0000 (-0700)
Subject: draw: Avoid aliasing violations.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=be35c6ba92ec460f3fc2b172c556d9dc3e253fce;p=mesa.git

draw: Avoid aliasing violations.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
---

diff --git a/src/gallium/auxiliary/draw/draw_cliptest_tmp.h b/src/gallium/auxiliary/draw/draw_cliptest_tmp.h
index 6fbefa56bf1..dd57c5678e0 100644
--- a/src/gallium/auxiliary/draw/draw_cliptest_tmp.h
+++ b/src/gallium/auxiliary/draw/draw_cliptest_tmp.h
@@ -25,6 +25,8 @@
  * 
  **************************************************************************/
 
+#include "util/u_bitcast.h"
+
 static boolean TAG(do_cliptest)( struct pt_post_vs *pvs,
                                  struct draw_vertex_info *info,
                                  const struct draw_prim_info *prim_info )
@@ -45,7 +47,7 @@ static boolean TAG(do_cliptest)( struct pt_post_vs *pvs,
       draw_current_shader_viewport_index_output(pvs->draw);
    int viewport_index = 
       draw_current_shader_uses_viewport_index(pvs->draw) ?
-      *((unsigned*)out->data[viewport_index_output]): 0;
+      u_bitcast_f2u(out->data[viewport_index_output][0]): 0;
    int num_written_clipdistance =
       draw_current_shader_num_written_clipdistances(pvs->draw);
 
@@ -72,7 +74,7 @@ static boolean TAG(do_cliptest)( struct pt_post_vs *pvs,
          unsigned verts_per_prim = u_vertices_per_prim(prim_info->prim);
          /* only change the viewport_index for the leading vertex */
          if (!(j % verts_per_prim)) {
-            viewport_index = *((unsigned*)out->data[viewport_index_output]);
+            viewport_index = u_bitcast_f2u(out->data[viewport_index_output][0]);
             viewport_index = draw_clamp_viewport_idx(viewport_index);
          }
          scale = pvs->draw->viewports[viewport_index].scale;
diff --git a/src/gallium/auxiliary/draw/draw_pipe_clip.c b/src/gallium/auxiliary/draw/draw_pipe_clip.c
index 78845ac0450..cf2b41738bf 100644
--- a/src/gallium/auxiliary/draw/draw_pipe_clip.c
+++ b/src/gallium/auxiliary/draw/draw_pipe_clip.c
@@ -32,6 +32,7 @@
  */
 
 
+#include "util/u_bitcast.h"
 #include "util/u_memory.h"
 #include "util/u_math.h"
 
@@ -90,7 +91,7 @@ draw_viewport_index(struct draw_context *draw,
       unsigned viewport_index_output =
          draw_current_shader_viewport_index_output(draw);
       unsigned viewport_index =
-         *((unsigned*)leading_vertex->data[viewport_index_output]);
+         u_bitcast_f2u(leading_vertex->data[viewport_index_output][0]);
       return draw_clamp_viewport_idx(viewport_index);
    } else {
       return 0;