From 57b5d3605745c96ddc2b6de7d50c93db65ba1257 Mon Sep 17 00:00:00 2001
From: Zack Rusin <zack@tungstengraphics.com>
Date: Fri, 28 Sep 2007 07:33:54 -0400
Subject: [PATCH] Use sse only if GALLIUM_SSE is defined

---
 src/mesa/pipe/draw/draw_context.c       | 11 +++++++++++
 src/mesa/pipe/draw/draw_context.h       |  1 +
 src/mesa/pipe/draw/draw_private.h       |  2 ++
 src/mesa/pipe/draw/draw_vertex_shader.c |  9 +++++----
 src/mesa/state_tracker/st_program.c     | 11 +++++++----
 5 files changed, 26 insertions(+), 8 deletions(-)

diff --git a/src/mesa/pipe/draw/draw_context.c b/src/mesa/pipe/draw/draw_context.c
index 5efb173228f..3fb667ab1a9 100644
--- a/src/mesa/pipe/draw/draw_context.c
+++ b/src/mesa/pipe/draw/draw_context.c
@@ -41,6 +41,12 @@ struct draw_context *draw_create( void )
 {
    struct draw_context *draw = CALLOC_STRUCT( draw_context );
 
+#if defined(__i386__) || defined(__386__)
+   draw->use_sse = getenv("GALLIUM_SSE") != NULL;
+#else
+   draw->use_sse = false;
+#endif
+
    /* create pipeline stages */
    draw->pipeline.unfilled  = draw_unfilled_stage( draw );
    draw->pipeline.twoside   = draw_twoside_stage( draw );
@@ -244,4 +250,9 @@ void draw_free_tmps( struct draw_stage *stage )
    }
 }
 
+boolean draw_use_sse(struct draw_context *draw)
+{
+   return draw->use_sse;
+}
+
 
diff --git a/src/mesa/pipe/draw/draw_context.h b/src/mesa/pipe/draw/draw_context.h
index 398e96d94d2..8e2232244cc 100644
--- a/src/mesa/pipe/draw/draw_context.h
+++ b/src/mesa/pipe/draw/draw_context.h
@@ -99,6 +99,7 @@ void draw_bind_vertex_shader(struct draw_context *draw,
 void draw_delete_vertex_shader(struct draw_context *draw,
                                void *vcso);
 
+boolean draw_use_sse(struct draw_context *draw);
 
 void
 draw_set_vertex_buffer(struct draw_context *draw,
diff --git a/src/mesa/pipe/draw/draw_private.h b/src/mesa/pipe/draw/draw_private.h
index 2f52299f74a..12a970a6711 100644
--- a/src/mesa/pipe/draw/draw_private.h
+++ b/src/mesa/pipe/draw/draw_private.h
@@ -220,6 +220,8 @@ struct draw_context
       struct prim_header queue[PRIM_QUEUE_LENGTH];
       unsigned queue_nr;
    } pq;
+
+   int use_sse : 1;
 };
 
 
diff --git a/src/mesa/pipe/draw/draw_vertex_shader.c b/src/mesa/pipe/draw/draw_vertex_shader.c
index f7ddbd19093..3518bd52a3f 100644
--- a/src/mesa/pipe/draw/draw_vertex_shader.c
+++ b/src/mesa/pipe/draw/draw_vertex_shader.c
@@ -220,10 +220,11 @@ draw_create_vertex_shader(struct draw_context *draw,
 #if defined(__i386__) || defined(__386__)
    x86_init_func(&vs->sse2_program);
 
-   tgsi_emit_sse2(shader->tokens, &vs->sse2_program);
-
-   ((struct pipe_shader_state*)(vs->state))->executable =
-      x86_get_func(&vs->sse2_program);
+   if (draw->use_sse) {
+      tgsi_emit_sse2(shader->tokens, &vs->sse2_program);
+      ((struct pipe_shader_state*)(vs->state))->executable =
+         x86_get_func(&vs->sse2_program);
+   }
 #endif
 
    return vs;
diff --git a/src/mesa/state_tracker/st_program.c b/src/mesa/state_tracker/st_program.c
index 116b59a067a..a41b953a21d 100644
--- a/src/mesa/state_tracker/st_program.c
+++ b/src/mesa/state_tracker/st_program.c
@@ -36,6 +36,7 @@
 
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
+#include "pipe/draw/draw_context.h"
 #include "pipe/tgsi/mesa/mesa_to_tgsi.h"
 #include "pipe/tgsi/exec/tgsi_core.h"
 
@@ -391,11 +392,13 @@ st_translate_fragment_program(struct st_context *st,
       tgsi_dump( tokensOut, 0/*TGSI_DUMP_VERBOSE*/ );
 
 #if defined(__i386__) || defined(__386__)
-   if (stfp->sse2_program.csr == stfp->sse2_program.store)
-      tgsi_emit_sse2_fs( tokensOut, &stfp->sse2_program );
+   if (draw_use_sse(st->draw)) {
+      if (stfp->sse2_program.csr == stfp->sse2_program.store)
+         tgsi_emit_sse2_fs( tokensOut, &stfp->sse2_program );
 
-   if (!cso->state.executable)
-      ((struct cso_fragment_shader*)cso)->state.executable = (void *) x86_get_func( &stfp->sse2_program );
+      if (!cso->state.executable)
+         ((struct cso_fragment_shader*)cso)->state.executable = (void *) x86_get_func( &stfp->sse2_program );
+   }
 #endif
 
    return cso;
-- 
2.30.2