From fc9b867dd9c9a6d38d7fe478217060e11b9e7e1b Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Wed, 16 Nov 2016 08:15:46 +0000
Subject: [PATCH] :fire: :fire: :dragonite:
---
src/blas.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 48 insertions(+), 0 deletions(-)
diff --git a/src/blas.c b/src/blas.c
index 35a4c40..c6d59ea 100644
--- a/src/blas.c
+++ b/src/blas.c
@@ -1,6 +1,36 @@
#include "blas.h"
#include "math.h"
#include <assert.h>
+#include <float.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void flatten(float *x, int size, int layers, int batch, int forward)
+{
+ float *swap = calloc(size*layers*batch, sizeof(float));
+ int i,c,b;
+ for(b = 0; b < batch; ++b){
+ for(c = 0; c < layers; ++c){
+ for(i = 0; i < size; ++i){
+ int i1 = b*layers*size + c*size + i;
+ int i2 = b*layers*size + i*layers + c;
+ if (forward) swap[i2] = x[i1];
+ else swap[i1] = x[i2];
+ }
+ }
+ }
+ memcpy(x, swap, size*layers*batch*sizeof(float));
+ free(swap);
+}
+
+void weighted_sum_cpu(float *a, float *b, float *s, int n, float *c)
+{
+ int i;
+ for(i = 0; i < n; ++i){
+ c[i] = s[i]*a[i] + (1-s[i])*(b ? b[i] : 0);
+ }
+}
void shortcut_cpu(int batch, int w1, int h1, int c1, float *add, int w2, int h2, int c2, float *out)
{
@@ -150,3 +180,21 @@
return dot;
}
+void softmax(float *input, int n, float temp, float *output)
+{
+ int i;
+ float sum = 0;
+ float largest = -FLT_MAX;
+ for(i = 0; i < n; ++i){
+ if(input[i] > largest) largest = input[i];
+ }
+ for(i = 0; i < n; ++i){
+ float e = exp(input[i]/temp - largest/temp);
+ sum += e;
+ output[i] = e;
+ }
+ for(i = 0; i < n; ++i){
+ output[i] /= sum;
+ }
+}
+
--
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