From 913d355ec1cf34aad71fdd75202fc3b0309e63a0 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Thu, 28 Jan 2016 20:30:38 +0000
Subject: [PATCH] lots of stuff

---
 src/blas.c |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/src/blas.c b/src/blas.c
index 8769df3..d7948bb 100644
--- a/src/blas.c
+++ b/src/blas.c
@@ -67,7 +67,7 @@
         for(f = 0; f < filters; ++f){
             for(i = 0; i < spatial; ++i){
                 int index = b*filters*spatial + f*spatial + i;
-                x[index] = (x[index] - mean[f])/(sqrt(variance[f]));
+                x[index] = (x[index] - mean[f])/(sqrt(variance[f]) + .00001f);
             }
         }
     }
@@ -115,6 +115,16 @@
     for(i = 0; i < N; ++i) Y[i*INCY] = X[i*INCX];
 }
 
+void smooth_l1_cpu(int n, float *pred, float *truth, float *delta)
+{
+    int i;
+    for(i = 0; i < n; ++i){
+        float diff = truth[i] - pred[i];
+        if(fabs(diff) > 1) delta[i] = diff;
+        else delta[i] = (diff > 0) ? 1 : -1;
+    }
+}
+
 float dot_cpu(int N, float *X, int INCX, float *Y, int INCY)
 {
     int i;

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