diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp index c5886d4..59c7d21 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp @@ -59,7 +59,10 @@ vec4_gs_visitor::make_reg_for_system_value(int location) switch (location) { case SYSTEM_VALUE_INVOCATION_ID: this->current_annotation = "initialize gl_InvocationID"; - emit(GS_OPCODE_GET_INSTANCE_ID, *reg); + if (gs_prog_data->invocations > 1) + emit(GS_OPCODE_GET_INSTANCE_ID, *reg); + else + emit(MOV(*reg, brw_imm_ud(0))); break; default: unreachable("not reached"); |