X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;ds=sidebyside;f=src%2Fgallium%2Fauxiliary%2Fdraw%2Fdraw_vs_exec.c;h=c41d7c42a018e20ff58aafe47b89894210eec249;hb=652901e95b4ed406293d0e1fabee857c054119b1;hp=667eb50785570d8210735541220e5b2f72427db7;hpb=21001d2ba79be26f565a6795a907ec266564f4cd;p=mesa.git

diff --git a/src/gallium/auxiliary/draw/draw_vs_exec.c b/src/gallium/auxiliary/draw/draw_vs_exec.c
index 667eb507855..c41d7c42a01 100644
--- a/src/gallium/auxiliary/draw/draw_vs_exec.c
+++ b/src/gallium/auxiliary/draw/draw_vs_exec.c
@@ -99,6 +99,12 @@ vs_exec_run_linear( struct draw_vertex_shader *shader,
    tgsi_exec_set_constant_buffers(machine, PIPE_MAX_CONSTANT_BUFFERS,
                                   constants, const_size);
 
+   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 (i = 0; i < count; i += MAX_TGSI_VERTICES) {
       unsigned int max_vertices = MIN2(MAX_TGSI_VERTICES, count - i);