st/mesa: implement ARB_shader_clock

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 16f86856a344ca0f33864a5cc17fca66a41a58b1..a48c22e82e79ad3b439725da98cd274b008cc23a 100644 (file)
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -599,6 +599,7 @@ void st_init_extensions(struct pipe_screen *screen,
       { o(ARB_robust_buffer_access_behavior), PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR   },
       { o(ARB_sample_shading),               PIPE_CAP_SAMPLE_SHADING                   },
       { o(ARB_seamless_cube_map),            PIPE_CAP_SEAMLESS_CUBE_MAP                },
+      { o(ARB_shader_clock),                 PIPE_CAP_TGSI_CLOCK                       },
       { o(ARB_shader_draw_parameters),       PIPE_CAP_DRAW_PARAMETERS                  },
       { o(ARB_shader_group_vote),            PIPE_CAP_TGSI_VOTE                        },
       { o(ARB_shader_stencil_export),        PIPE_CAP_SHADER_STENCIL_EXPORT            },

diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 31c14ed9ec70a048f0f8d3d3a7967773b80267a0..369dff77075ff7763a92a47dfece54a07e9e69c6 100644 (file)
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -3963,6 +3963,16 @@ glsl_to_tgsi_visitor::visit(ir_call *ir)
       visit_image_intrinsic(ir);
       return;
 
+   case ir_intrinsic_shader_clock: {
+      ir->return_deref->accept(this);
+
+      st_dst_reg dst = st_dst_reg(this->result);
+      dst.writemask = TGSI_WRITEMASK_XY;
+
+      emit_asm(ir, TGSI_OPCODE_CLOCK, dst);
+      return;
+   }
+
    case ir_intrinsic_invalid:
    case ir_intrinsic_generic_load:
    case ir_intrinsic_generic_store:
@@ -3974,7 +3984,6 @@ glsl_to_tgsi_visitor::visit(ir_call *ir)
    case ir_intrinsic_generic_atomic_max:
    case ir_intrinsic_generic_atomic_exchange:
    case ir_intrinsic_generic_atomic_comp_swap:
-   case ir_intrinsic_shader_clock:
       unreachable("Invalid intrinsic");
    }
 }