From 00cf28f4772e71945bfa7856eb340d2f2540585a Mon Sep 17 00:00:00 2001
From: raver119 <raver119@gmail.com>
Date: Sun, 1 Sep 2019 19:57:39 +0300
Subject: [PATCH] get rid of builtin_popcount to please ppc

Signed-off-by: raver119 <raver119@gmail.com>
---
 .../ops/declarable/helpers/cpu/hamming.cpp     | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/libnd4j/include/ops/declarable/helpers/cpu/hamming.cpp b/libnd4j/include/ops/declarable/helpers/cpu/hamming.cpp
index 9d947e5ab..62bf3ff4c 100644
--- a/libnd4j/include/ops/declarable/helpers/cpu/hamming.cpp
+++ b/libnd4j/include/ops/declarable/helpers/cpu/hamming.cpp
@@ -24,6 +24,18 @@
 namespace nd4j {
     namespace ops {
         namespace helpers {
+
+            static Nd4jLong hamming_distance(unsigned long long x, unsigned long long y) {
+                Nd4jLong dist = 0;
+
+                for (unsigned long long val = x ^ y; val > 0; val /= 2) {
+                    if (val & 1)
+                        dist++;
+                }
+                return dist;
+            }
+
+
             template <typename X, typename Z>
             static void _hamming(NDArray &x, NDArray &y, NDArray &z) {
                 auto xEws = x.ews();
@@ -47,7 +59,7 @@ namespace nd4j {
                         auto _x = static_cast<unsigned long long>(xBuffer[e]);
                         auto _y = static_cast<unsigned long long>(yBuffer[e]);
 
-                        intermediate[omp_get_thread_num()] += __builtin_popcountll(_x ^ _y);
+                        intermediate[omp_get_thread_num()] += hamming_distance(_x ^ _y);
                     }
 
                 } else if (xEws > 1 && yEws > 1 && x.ordering() == y.ordering()) {
@@ -56,7 +68,7 @@ namespace nd4j {
                         auto _x = static_cast<unsigned long long>(xBuffer[e * xEws]);
                         auto _y = static_cast<unsigned long long>(yBuffer[e * yEws]);
 
-                        intermediate[omp_get_thread_num()] += __builtin_popcountll(_x ^ _y);
+                        intermediate[omp_get_thread_num()] += hamming_distance(_x ^ _y);
                     }
                 } else {
                     PRAGMA_OMP_PARALLEL_FOR
@@ -64,7 +76,7 @@ namespace nd4j {
                         auto _x = static_cast<unsigned long long>(x.e<Nd4jLong>(e));
                         auto _y = static_cast<unsigned long long>(y.e<Nd4jLong>(e));
 
-                        intermediate[omp_get_thread_num()] += __builtin_popcountll(_x ^ _y);
+                        intermediate[omp_get_thread_num()] += hamming_distance(_x ^ _y);
                     }
                 }