tgsi/softpipe: add VertexID support.

This required changing the system value semantics, so we stored
a system value per vertex, instance id is the only other system
value we currently support, so I span it across the channels.

This passes the 3 vertexid-* piglit tests + lots of instanceid tests.

Signed-off-by: Dave Airlie <[email protected]>

1 files changed, 8 insertions, 1 deletions

diff --git a/src/gallium/auxiliary/draw/draw_vs_exec.c b/src/gallium/auxiliary/draw/draw_vs_exec.c
index 3f89881534b..bfe7aea737b 100644
--- a/src/gallium/auxiliary/draw/draw_vs_exec.c
+++ b/src/gallium/auxiliary/draw/draw_vs_exec.c
@@ -103,7 +103,8 @@ vs_exec_run_linear( struct draw_vertex_shader *shader,
    if (shader->info.uses_instanceid) {
       unsigned i = machine->SysSemanticToIndex[TGSI_SEMANTIC_INSTANCEID];
       assert(i < Elements(machine->SystemValue));
-      machine->SystemValue[i][0] = shader->draw->instance_id;
+      for (j = 0; j < QUAD_SIZE; j++)
+         machine->SystemValue[i].i[j] = shader->draw->instance_id;
    }
 
    for (i = 0; i < count; i += MAX_TGSI_VERTICES) {
@@ -123,6 +124,12 @@ vs_exec_run_linear( struct draw_vertex_shader *shader,
          }
 #endif
 
+         if (shader->info.uses_vertexid) {
+            unsigned vid = machine->SysSemanticToIndex[TGSI_SEMANTIC_VERTEXID];
+            assert(vid < Elements(machine->SystemValue));
+            machine->SystemValue[vid].i[j] = i + j;
+         }
+
          for (slot = 0; slot < shader->info.num_inputs; slot++) {
 #if 0
             assert(!util_is_inf_or_nan(input[slot][0]));