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Support for attention bias in gemma + refactor things a bit. (#1744)

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* Support for attention bias in gemma + refactor things a bit.

* Fix the cuda tests.
This commit is contained in:
Laurent Mazare
2024-02-22 09:35:28 +01:00
committed by GitHub
parent 8013b50829
commit c753f72c85
8 changed files with 62 additions and 88 deletions
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23
candle-nn/src/linear.rs
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@ -57,21 +57,34 @@ impl super::Module for Linear {
/// Create or initialize a new linear layer.
///
/// This uses some default names for weights and biases, namely `"weight"` and `"bias"`.
pub fn linear(in_dim: usize, out_dim: usize, vs: crate::VarBuilder) -> Result<Linear> {
pub fn linear(in_dim: usize, out_dim: usize, vb: crate::VarBuilder) -> Result<Linear> {
let init_ws = crate::init::DEFAULT_KAIMING_NORMAL;
let ws = vs.get_with_hints((out_dim, in_dim), "weight", init_ws)?;
let ws = vb.get_with_hints((out_dim, in_dim), "weight", init_ws)?;
let bound = 1. / (in_dim as f64).sqrt();
let init_bs = crate::Init::Uniform {
lo: -bound,
up: bound,
};
let bs = vs.get_with_hints(out_dim, "bias", init_bs)?;
let bs = vb.get_with_hints(out_dim, "bias", init_bs)?;
Ok(Linear::new(ws, Some(bs)))
}
/// Create or initialize a new linear layer without biases.
pub fn linear_no_bias(in_dim: usize, out_dim: usize, vs: crate::VarBuilder) -> Result<Linear> {
pub fn linear_no_bias(in_dim: usize, out_dim: usize, vb: crate::VarBuilder) -> Result<Linear> {
let init_ws = crate::init::DEFAULT_KAIMING_NORMAL;
let ws = vs.get_with_hints((out_dim, in_dim), "weight", init_ws)?;
let ws = vb.get_with_hints((out_dim, in_dim), "weight", init_ws)?;
Ok(Linear::new(ws, None))
}
pub fn linear_b(
in_dim: usize,
out_dim: usize,
bias: bool,
vb: crate::VarBuilder,
) -> Result<Linear> {
if bias {
linear(in_dim, out_dim, vb)
} else {
linear_no_bias(in_dim, out_dim, vb)
}
}