Able to compile

self-intention/src/main.rs

@@ -1,43 +1,56 @@
 use anyhow::Ok;
 use anyhow::Result;
+use candle_core::Var;
 use candle_core::{DType, Device, Tensor, D};
 use candle_nn::ops::softmax;
-use candle_nn::{loss, Linear, Module, Optimizer, Sequential, VarMap, SGD};
+use candle_nn::VarBuilder;
+use candle_nn::{linear, Linear, Module, Optimizer, Sequential, VarMap, SGD};
 
 struct SelfAttention {
-    d: u32, // Embedding size
+    d: usize, // Embedding size
+    scale: Tensor,
     w_q: Linear,
     w_k: Linear,
     w_v: Linear,
 }
 
 impl SelfAttention {
-    fn new(d: u32) -> Self {
+    fn new(d: usize, vb: VarBuilder) -> Result<Self> {
         let d = d;
-        let w_q = Linear::new(d, d);
-        let w_k = Linear::new(d, d);
-        let w_v = Linear::new(d, d);
+        let scale = Tensor::new((d as f32).sqrt(), vb.device())?;
+        let w_q = linear(d, d, vb.pp("w_q"))?;
+        let w_k = linear(d, d, vb.pp("w_k"))?;
+        let w_v = linear(d, d, vb.pp("w_v"))?;
 
-        Self { d, w_q, w_k, w_v }
+        Ok(Self {
+            d,
+            scale,
+            w_q,
+            w_k,
+            w_v,
+        })
     }
 }
 
-impl Module for SelfAttention {
-    fn forward(&self, x: &Tensor) -> Tensor {
-        let q = self.w_q.forward(x);
-        let k = self.w_k.forward(x);
-        let v = self.w_v.forward(x);
+impl SelfAttention {
+    fn attention(&self, x: &Tensor) -> Result<Tensor> {
+        let q = self.w_q.forward(x)?;
+        let k = self.w_k.forward(x)?;
+        let v = self.w_v.forward(x)?;
 
-        let qk = q.matmul(&k.transpose(1, 0));
-        let qk = qk / D::from_f32((self.d as f32).sqrt());
-        let qk = softmax(&qk, 1);
+        let qk = q.matmul(&k.transpose(1, 0)?)?;
 
-        qk.matmul(&v)
+        let qk = qk.broadcast_div(&self.scale)?;
+        let qk = softmax(&qk, 1)?;
+
+        Ok(qk.matmul(&v)?)
     }
 }
 fn main() -> Result<()> {
     let device = Device::cuda_if_available(0)?;
     let varmap = VarMap::new();
+    let vs = VarBuilder::from_varmap(&varmap, DType::F32, &device);
+    let self_attn = SelfAttention::new(4, vs)?;
 
     Ok(())
 }