nir/spirv: implement BuiltInGlobalSize

Reviewed-by: Jason Ekstrand <[email protected]>
Signed-off-by: Karol Herbst <[email protected]>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/compiler/nir/nir_lower_system_values.c b/src/compiler/nir/nir_lower_system_values.c
index e8367981a5f..da04895d66c 100644
--- a/src/compiler/nir/nir_lower_system_values.c
+++ b/src/compiler/nir/nir_lower_system_values.c
@@ -171,6 +171,13 @@ convert_block(nir_block *block, nir_builder *b)
             sysval = nir_imm_int(b, 0);
          break;
 
+      case SYSTEM_VALUE_GLOBAL_GROUP_SIZE: {
+         nir_ssa_def *group_size = build_local_group_size(b);
+         nir_ssa_def *num_work_groups = nir_load_num_work_groups(b);
+         sysval = nir_imul(b, group_size, num_work_groups);
+         break;
+      }
+
       default:
          break;
       }