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authorKeith Whitwell <keithw@vmware.com>2009-11-19 19:15:21 -0800
committerKeith Whitwell <keithw@vmware.com>2009-11-19 19:29:33 -0800
commit34a01929d54266e8e5fec47e94859405bce588fa (patch)
tree9e34eebc70365286c87ef5251721ced1d605545b /src/gallium/drivers/i965
parent47cef2bb8f5979ae690e89943f83060999a29a55 (diff)
i965g: special case setup when fs has no inputs
Diffstat (limited to 'src/gallium/drivers/i965')
-rw-r--r--src/gallium/drivers/i965/brw_sf.c60
-rw-r--r--src/gallium/drivers/i965/brw_sf.h1
-rw-r--r--src/gallium/drivers/i965/brw_sf_emit.c19
3 files changed, 55 insertions, 25 deletions
diff --git a/src/gallium/drivers/i965/brw_sf.c b/src/gallium/drivers/i965/brw_sf.c
index aa2ab5098c..0b94dc40c3 100644
--- a/src/gallium/drivers/i965/brw_sf.c
+++ b/src/gallium/drivers/i965/brw_sf.c
@@ -64,32 +64,42 @@ static enum pipe_error compile_sf_prog( struct brw_context *brw,
c.prog_data.urb_read_length = c.nr_attr_regs;
c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
-
- /* Which primitive? Or all three?
+ /* Special case when there are no attributes to setup.
+ *
+ * XXX: should be able to set nr_setup_attrs to nr_attrs-1 -- but
+ * breaks vp-tris.c
*/
- switch (key->primitive) {
- case SF_TRIANGLES:
- c.nr_verts = 3;
- brw_emit_tri_setup( &c, GL_TRUE );
- break;
- case SF_LINES:
- c.nr_verts = 2;
- brw_emit_line_setup( &c, GL_TRUE );
- break;
- case SF_POINTS:
- c.nr_verts = 1;
- if (key->do_point_sprite)
- brw_emit_point_sprite_setup( &c, GL_TRUE );
- else
- brw_emit_point_setup( &c, GL_TRUE );
- break;
- case SF_UNFILLED_TRIS:
- c.nr_verts = 3;
- brw_emit_anyprim_setup( &c );
- break;
- default:
- assert(0);
- return PIPE_ERROR_BAD_INPUT;
+ if (c.nr_attrs - 1 == 0) {
+ c.nr_verts = 0;
+ brw_emit_null_setup( &c );
+ }
+ else {
+ /* Which primitive? Or all three?
+ */
+ switch (key->primitive) {
+ case SF_TRIANGLES:
+ c.nr_verts = 3;
+ brw_emit_tri_setup( &c, GL_TRUE );
+ break;
+ case SF_LINES:
+ c.nr_verts = 2;
+ brw_emit_line_setup( &c, GL_TRUE );
+ break;
+ case SF_POINTS:
+ c.nr_verts = 1;
+ if (key->do_point_sprite)
+ brw_emit_point_sprite_setup( &c, GL_TRUE );
+ else
+ brw_emit_point_setup( &c, GL_TRUE );
+ break;
+ case SF_UNFILLED_TRIS:
+ c.nr_verts = 3;
+ brw_emit_anyprim_setup( &c );
+ break;
+ default:
+ assert(0);
+ return PIPE_ERROR_BAD_INPUT;
+ }
}
/* get the program
diff --git a/src/gallium/drivers/i965/brw_sf.h b/src/gallium/drivers/i965/brw_sf.h
index 0b7003dc5e..a895c7d2f6 100644
--- a/src/gallium/drivers/i965/brw_sf.h
+++ b/src/gallium/drivers/i965/brw_sf.h
@@ -112,6 +112,7 @@ struct brw_sf_compile {
};
+void brw_emit_null_setup( struct brw_sf_compile *c );
void brw_emit_tri_setup( struct brw_sf_compile *c, GLboolean allocate );
void brw_emit_line_setup( struct brw_sf_compile *c, GLboolean allocate );
void brw_emit_point_setup( struct brw_sf_compile *c, GLboolean allocate );
diff --git a/src/gallium/drivers/i965/brw_sf_emit.c b/src/gallium/drivers/i965/brw_sf_emit.c
index db52c9553e..2983e8a9dd 100644
--- a/src/gallium/drivers/i965/brw_sf_emit.c
+++ b/src/gallium/drivers/i965/brw_sf_emit.c
@@ -352,6 +352,25 @@ static GLboolean calculate_masks( struct brw_sf_compile *c,
}
+void brw_emit_null_setup( struct brw_sf_compile *c )
+{
+ struct brw_compile *p = &c->func;
+
+ /* m0 is implicitly copied from r0 in the send instruction:
+ */
+ brw_urb_WRITE(p,
+ brw_null_reg(),
+ 0,
+ brw_vec8_grf(0, 0), /* r0, will be copied to m0 */
+ 0, /* allocate */
+ 1, /* used */
+ 1, /* msg len */
+ 0, /* response len */
+ 1, /* eot */
+ 1, /* writes complete */
+ 0, /* offset */
+ BRW_URB_SWIZZLE_TRANSPOSE);
+}
void brw_emit_tri_setup( struct brw_sf_compile *c, GLboolean allocate)
{