gallium: Centralize SSE usage logic.

src/gallium/auxiliary/draw/draw_context.c

@@ -45,12 +45,6 @@ struct draw_context *draw_create( void )
    if (draw == NULL)
       goto fail;
 
-#if defined(__i386__) || defined(__386__)
-   draw->use_sse = GETENV( "GALLIUM_NOSSE" ) == NULL;
-#else
-   draw->use_sse = FALSE;
-#endif
-
    ASSIGN_4V( draw->plane[0], -1,  0,  0, 1 );
    ASSIGN_4V( draw->plane[1],  1,  0,  0, 1 );
    ASSIGN_4V( draw->plane[2],  0, -1,  0, 1 );
@@ -320,12 +314,6 @@ draw_num_vs_outputs(struct draw_context *draw)
 
 
 
-boolean draw_use_sse(struct draw_context *draw)
-{
-   return (boolean) draw->use_sse;
-}
-
-
 void draw_set_render( struct draw_context *draw, 
 		      struct vbuf_render *render )
 {

src/gallium/auxiliary/draw/draw_context.h

@@ -73,8 +73,6 @@ void draw_enable_line_stipple(struct draw_context *draw, boolean enable);
 void draw_enable_point_sprites(struct draw_context *draw, boolean enable);
 
 
-boolean draw_use_sse(struct draw_context *draw);
-
 void
 draw_install_aaline_stage(struct draw_context *draw, struct pipe_context *pipe);
 

src/gallium/auxiliary/draw/draw_private.h

@@ -192,8 +192,6 @@ struct draw_context
    float plane[12][4];
    unsigned nr_planes;
 
-   boolean use_sse;
-
    /* If a prim stage introduces new vertex attributes, they'll be stored here
     */
    struct {

src/gallium/auxiliary/draw/draw_vs_sse.c

@@ -41,6 +41,7 @@
 #include "draw_private.h"
 #include "draw_context.h"
 
+#include "rtasm/rtasm_cpu.h"
 #include "rtasm/rtasm_x86sse.h"
 #include "tgsi/exec/tgsi_sse2.h"
 #include "tgsi/util/tgsi_parse.h"
@@ -155,7 +156,7 @@ draw_create_vs_sse(struct draw_context *draw,
    struct draw_sse_vertex_shader *vs;
    uint nt = tgsi_num_tokens(templ->tokens);
 
-   if (!draw->use_sse) 
+   if (!rtasm_cpu_has_sse2())
       return NULL;
 
    vs = CALLOC_STRUCT( draw_sse_vertex_shader );

src/gallium/auxiliary/rtasm/rtasm_cpu.c

@@ -26,14 +26,20 @@
  **************************************************************************/
 
 
+#include "pipe/p_debug.h"
 #include "rtasm_cpu.h"
 
 
+static boolean rtasm_sse_enabled(void)
+{
+   return !debug_get_bool_option("GALLIUM_NOSSE", FALSE);
+}
+
 int rtasm_cpu_has_sse(void)
 {
    /* FIXME: actually detect this at run-time */
 #if defined(__i386__) || defined(__386__) || defined(i386)
-   return 1;
+   return rtasm_sse_enabled();
 #else
    return 0;
 #endif
@@ -43,7 +49,7 @@ int rtasm_cpu_has_sse2(void)
 {
    /* FIXME: actually detect this at run-time */
 #if defined(__i386__) || defined(__386__) || defined(i386)
-   return 1;
+   return rtasm_sse_enabled();
 #else
    return 0;
 #endif