i965/nir: Support gl_LocalInvocationID variable

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>

diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
index 8c3c4aed7078db5ce0b5c6d99a8c2daee9084b75..286ec28358411d8614155a0f4e4c2c706df2413b 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
@@ -337,6 +337,13 @@ emit_system_values_block(nir_block *block, void *void_visitor)
                                  BRW_REGISTER_TYPE_D));
          break;
 
+      case nir_intrinsic_load_local_invocation_id:
+         assert(v->stage == MESA_SHADER_COMPUTE);
+         reg = &v->nir_system_values[SYSTEM_VALUE_LOCAL_INVOCATION_ID];
+         if (reg->file == BAD_FILE)
+            *reg = *v->emit_cs_local_invocation_id_setup();
+         break;
+
       default:
          break;
       }
@@ -1709,6 +1716,16 @@ fs_visitor::nir_emit_intrinsic(const fs_builder &bld, nir_intrinsic_instr *instr
          ((struct brw_cs_prog_data *) prog_data)->uses_barrier = true;
       break;
 
+   case nir_intrinsic_load_local_invocation_id: {
+      gl_system_value sv = nir_system_value_from_intrinsic(instr->intrinsic);
+      fs_reg val = nir_system_values[sv];
+      assert(val.file != BAD_FILE);
+      dest.type = val.type;
+      for (unsigned i = 0; i < 3; i++)
+         bld.MOV(offset(dest, bld, i), offset(val, bld, i));
+      break;
+   }
+
    default:
       unreachable("unknown intrinsic");
    }