i965/fs/nir: add nir_op_unpack_half_2x16_split_*_flush_to_zero

The denorm mode is set in the control register, no need to do
something else.

v2:
- Add an assert to make sure that we realize if this assumption is
  broken in the future (Caio).

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Signed-off-by: Andres Gomez <agomez@igalia.com>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>

diff --git a/src/intel/compiler/brw_fs_nir.cpp b/src/intel/compiler/brw_fs_nir.cpp
index 4e2881756ea4f0b2e1d99a0f2c6b8197d7026f9c..5ed35ff78c0e785b198dad1c97b9739ef38784de 100644 (file)
--- a/src/intel/compiler/brw_fs_nir.cpp
+++ b/src/intel/compiler/brw_fs_nir.cpp
@@ -1600,11 +1600,15 @@ fs_visitor::nir_emit_alu(const fs_builder &bld, nir_alu_instr *instr,
    case nir_op_pack_half_2x16:
       unreachable("not reached: should be handled by lower_packing_builtins");
 
+   case nir_op_unpack_half_2x16_split_x_flush_to_zero:
+      assert(FLOAT_CONTROLS_DENORM_FLUSH_TO_ZERO_FP16 & execution_mode);
    case nir_op_unpack_half_2x16_split_x:
       inst = bld.emit(BRW_OPCODE_F16TO32, result,
                       subscript(op[0], BRW_REGISTER_TYPE_UW, 0));
       inst->saturate = instr->dest.saturate;
       break;
+   case nir_op_unpack_half_2x16_split_y_flush_to_zero:
+      assert(FLOAT_CONTROLS_DENORM_FLUSH_TO_ZERO_FP16 & execution_mode);
    case nir_op_unpack_half_2x16_split_y:
       inst = bld.emit(BRW_OPCODE_F16TO32, result,
                       subscript(op[0], BRW_REGISTER_TYPE_UW, 1));