From 83fb1fd4655bee54f5c59161aafad3951fc16dd3 Mon Sep 17 00:00:00 2001
From: Filip Leonarski <filip.leonarski@psi.ch>
Date: Tue, 17 Oct 2023 13:22:49 +0200
Subject: [PATCH] FPGA: Clean-up of prefix_sum

---
 fpga/hls/spot_finder.h | 30 ------------------------------
 1 file changed, 30 deletions(-)

diff --git a/fpga/hls/spot_finder.h b/fpga/hls/spot_finder.h
index c244bca5..4f52189b 100644
--- a/fpga/hls/spot_finder.h
+++ b/fpga/hls/spot_finder.h
@@ -63,36 +63,6 @@ ap_uint<N*32> prefix_sum(const ap_uint<N*(32+(2 * FPGA_NBX))> ext_column_sum) {
     return pack32(line_sum);
 }
 
-template <int N>
-ap_uint<N*32> prefix_sum(const ap_uint<N*32> ext_column_sum,
-                         const ap_uint<N*(2 * FPGA_NBX)> ext_column_sum_old) {
-#pragma HLS PIPELINE II=1
-    ap_int<N> column_sum[32 + 2 * FPGA_NBX];
-    ap_uint<N*32> retval;
-    ap_int<N> line_sum[32];
-    ap_int<N> tmp_sum = 0;
-
-    for (int i = 0; i < 2 * FPGA_NBX; i++)
-        column_sum[i] = ext_column_sum_old(i*N+(N-1), i*N);
-
-    for (int i = 0; i < 32; i++)
-        column_sum[i+ 2 * FPGA_NBX] = ext_column_sum(i * N + (N - 1), i * N);
-
-    //for (int i = 0; i < 32; i++) {
-    //    line_sum[i] = 0;
-    //    for (int j = 0; j < 2 * FPGA_NBX + 1; j++)
-    //        line_sum[i] += column_sum[i + j];
-    //}
-
-    for (int i = 0; i < 32; i++) {
-        tmp_sum += column_sum[i + 2 * FPGA_NBX];
-        line_sum[i] = tmp_sum;
-        tmp_sum -= column_sum[i];
-    }
-
-    return pack32(line_sum);
-}
-
 void calc_mask_diff(ap_uint<MASK_SUM_BITWIDTH*32> &ext_column_valid,
                     const ap_uint<32> ext_old_value,
                     const ap_uint<32> ext_new_value);