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-rw-r--r--src/gallium/auxiliary/draw/draw_vs_exec.c6
-rw-r--r--src/gallium/auxiliary/draw/draw_vs_sse.c14
2 files changed, 20 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_vs_exec.c b/src/gallium/auxiliary/draw/draw_vs_exec.c
index 44563803f90..82d27d44934 100644
--- a/src/gallium/auxiliary/draw/draw_vs_exec.c
+++ b/src/gallium/auxiliary/draw/draw_vs_exec.c
@@ -120,6 +120,12 @@ vs_exec_run_linear( struct draw_vertex_shader *shader,
input = (const float (*)[4])((const char *)input + input_stride);
}
+ tgsi_set_exec_mask(machine,
+ 1,
+ max_vertices > 1,
+ max_vertices > 2,
+ max_vertices > 3);
+
/* run interpreter */
tgsi_exec_machine_run( machine );
diff --git a/src/gallium/auxiliary/draw/draw_vs_sse.c b/src/gallium/auxiliary/draw/draw_vs_sse.c
index 0efabd9de8b..77ba5152f9f 100644
--- a/src/gallium/auxiliary/draw/draw_vs_sse.c
+++ b/src/gallium/auxiliary/draw/draw_vs_sse.c
@@ -99,9 +99,23 @@ vs_sse_run_linear( struct draw_vertex_shader *base,
struct tgsi_exec_machine *machine = shader->machine;
unsigned int i;
+ /* By default, execute all channels. XXX move this inside the loop
+ * below when we support shader conditionals/loops.
+ */
+ tgsi_set_exec_mask(machine, 1, 1, 1, 1);
+
for (i = 0; i < count; i += MAX_TGSI_VERTICES) {
unsigned int max_vertices = MIN2(MAX_TGSI_VERTICES, count - i);
+ if (max_vertices < 4) {
+ /* disable the unused execution channels */
+ tgsi_set_exec_mask(machine,
+ 1,
+ max_vertices > 1,
+ max_vertices > 2,
+ 0);
+ }
+
/* run compiled shader
*/
shader->func(machine->Inputs,