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// RLX — versatile ML compiler + runtime.
// Copyright (C) 2026 Eugene Hauptmann, Nataliya Kosmyna.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 3.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
use std::sync::Arc;
use super::{GeluFfnStage, LayerScaleStage, VitSelfAttnStage};
use crate::layer::LayerStack;
use crate::stage::FlowStage;
/// Fused DINOv2 ViT encoder block (pre-norm + LayerScale + tanh-approx GELU FFN).
pub fn dinov2_layer_fused(
layer_idx: usize,
hidden_size: usize,
num_heads: usize,
eps: f32,
) -> FlowStage {
let lp = format!("blocks.{layer_idx}");
FlowStage::Named {
name: format!("layer{layer_idx}"),
inner: Arc::new(
LayerStack::named(lp.clone())
.residual_save()
.layer_norm(
format!("{lp}.norm1.weight"),
format!("{lp}.norm1.bias"),
eps,
)
.stage(FlowStage::VitSelfAttn(VitSelfAttnStage::dinov2(
&lp,
hidden_size,
num_heads,
)))
.stage(FlowStage::LayerScale(LayerScaleStage::new(format!(
"{lp}.ls1.gamma"
))))
.residual_add()
.residual_save()
.layer_norm(
format!("{lp}.norm2.weight"),
format!("{lp}.norm2.bias"),
eps,
)
.stage(FlowStage::GeluFfn(GeluFfnStage::dinov2(&lp)))
.stage(FlowStage::LayerScale(LayerScaleStage::new(format!(
"{lp}.ls2.gamma"
))))
.residual_add()
.build()
.unwrap_sequence(),
),
}
}
trait UnwrapSequence {
fn unwrap_sequence(self) -> FlowStage;
}
impl UnwrapSequence for FlowStage {
fn unwrap_sequence(self) -> FlowStage {
match self {
FlowStage::Named { inner, .. } => (*inner).clone(),
other => other,
}
}
}