From d9f1b0b16edeb59281355a855e18a8be343fc33c Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Fri, 08 Aug 2014 19:04:15 +0000
Subject: [PATCH] probably how maxpool layers should be
---
src/activations.cl | 23 ++++++++++++++---------
1 files changed, 14 insertions(+), 9 deletions(-)
diff --git a/src/activations.cl b/src/activations.cl
index 19428b1..65131c5 100644
--- a/src/activations.cl
+++ b/src/activations.cl
@@ -2,27 +2,32 @@
SIGMOID, RELU, LINEAR, RAMP, TANH
}ACTIVATION;
-float activate(float x, ACTIVATION a, float dropout)
+float linear_activate(float x){return x;}
+float sigmoid_activate(float x){return 1./(1. + exp(-x));}
+float relu_activate(float x){return x*(x>0);}
+float ramp_activate(float x){return x*(x>0)+.1*x;}
+float tanh_activate(float x){return (exp(2*x)-1)/(exp(2*x)+1);}
+
+float activate(float x, ACTIVATION a)
{
- //if((float)rand()/RAND_MAX < dropout) return 0;
switch(a){
case LINEAR:
- return linear_activate(x)/(1-dropout);
+ return linear_activate(x);
case SIGMOID:
- return sigmoid_activate(x)/(1-dropout);
+ return sigmoid_activate(x);
case RELU:
- return relu_activate(x)/(1-dropout);
+ return relu_activate(x);
case RAMP:
- return ramp_activate(x)/(1-dropout);
+ return ramp_activate(x);
case TANH:
- return tanh_activate(x)/(1-dropout);
+ return tanh_activate(x);
}
return 0;
}
__kernel void activate_array(__global float *x,
- const int n, const ACTIVATION a, const float dropout)
+ const int n, const ACTIVATION a)
{
int i = get_global_id(0);
- x[i] = activate(x[i], a, dropout);
+ x[i] = activate(x[i], a);
}
--
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