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Add hard-sigmoid and hard-swish activations (#1244)

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* Add hard-sigmoid and hard-swish activations

* Update ops.rs

* Use / rather than div.

---------

Co-authored-by: Laurent <laurent.mazare@gmail.com>
This commit is contained in:
jamjamjon
2023-11-03 01:20:27 +08:00
committed by GitHub
parent b97463098c
commit d39d0c40fd
2 changed files with 9 additions and 0 deletions
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4
candle-nn/src/activation.rs
View File

@ -13,7 +13,9 @@ pub enum Activation {
Relu6,
Silu,
Sigmoid,
HardSigmoid,
Swish,
HardSwish,
Elu(f64),
LeakyRelu(f64),
}
@ -29,7 +31,9 @@ impl super::Module for Activation {
Self::Relu6 => xs.clamp(0f32, 6f32),
Self::Silu => crate::ops::silu(xs),
Self::Sigmoid => crate::ops::sigmoid(xs),
Self::HardSigmoid => crate::ops::hard_sigmoid(xs),
Self::Swish => xs * crate::ops::sigmoid(xs)?,
Self::HardSwish => xs * crate::ops::hard_sigmoid(xs)?,
&Self::Elu(alpha) => xs.elu(alpha),
&Self::LeakyRelu(negative_slope) => crate::ops::leaky_relu(xs, negative_slope),
}

5
candle-nn/src/ops.rs
View File

@ -44,6 +44,11 @@ pub fn sigmoid(xs: &Tensor) -> Result<Tensor> {
(xs.neg()?.exp()? + 1.0)?.recip()
}
pub fn hard_sigmoid(xs: &Tensor) -> Result<Tensor> {
// TODO: Should we have a specialized op for this?
((xs + 3.0)? / 6.0)?.clamp(0f32, 1f32)
}
pub fn leaky_relu(xs: &Tensor, negative_slope: f64) -> Result<Tensor> {
let zeros = xs.zeros_like()?;
xs.maximum(&zeros)? + xs.minimum(&zeros)? * negative_slope