From d17b33131c14864bd1eae275f49a3f148e21cf29 Mon Sep 17 00:00:00 2001
From: Leo Chan <leochanj@live.unc.edu>
Date: Thu, 22 Oct 2020 01:53:21 -0400
Subject: Squashed commit of the sb-vbs branch.

Includes the SD-VBS benchmarks modified to:
- Use libextra to loop as realtime jobs
- Preallocate memory before starting their main computation
- Accept input via stdin instead of via argc

Does not include the SD-VBS matlab code.

Fixes libextra execution in LITMUS^RT.
---
 SD-VBS/common/c/ffConv2.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 SD-VBS/common/c/ffConv2.c

(limited to 'SD-VBS/common/c/ffConv2.c')

diff --git a/SD-VBS/common/c/ffConv2.c b/SD-VBS/common/c/ffConv2.c
new file mode 100644
index 0000000..450c5d2
--- /dev/null
+++ b/SD-VBS/common/c/ffConv2.c
@@ -0,0 +1,47 @@
+/********************************
+Author: Sravanthi Kota Venkata
+********************************/
+
+#include "sdvbs_common.h"
+
+F2D* ffConv2(F2D* a, F2D* b)
+{
+    F2D *c, *out;
+    int ma, na, mb, nb, ci, cj, i, j, m, n, ri, mm, nn;
+    int r_index, c_index;
+
+    ma = a->height;
+    na = a->width;
+
+    mb = b->height;
+    nb = b->width;
+    
+    ci = ma;
+    cj = na;
+
+    c = fSetArray(ci, cj, 0);
+
+    r_index = mb/2;
+    c_index = nb/2;
+
+    for(i=0; i<ma; i++)
+    {
+        for(j=0; j<na; j++)
+        {
+            for(m=0; m<mb; m++)
+            {
+                mm = mb-1-m;
+                for(n=0; n<nb; n++)
+                {
+                    nn = nb-1-n;
+                    ri = i+m-r_index;
+                    ci = j+n-c_index;
+                    if(ri >=0 && ri < ma && ci >= 0 && ci < na)
+                    subsref(c,i,j) += subsref(a,ri,ci) * subsref(b,mm,nn);
+                }
+            }
+        }
+    }
+
+    return c;
+}
-- 
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