Fix for big endian machines

lib/kokkos/core/src/impl/Kokkos_HostThreadTeam.cpp

@@ -291,6 +291,17 @@ int HostThreadTeamData::rendezvous( int64_t * const buffer
                        + ( ( rank & ~mask_byte ) << shift_mem_cycle )
                        + ( sync_offset << shift_byte );
 
+      // Switch designated byte if running on big endian machine
+      volatile uint16_t value = 1;
+      volatile uint8_t* byte = (uint8_t*) &value;
+      volatile bool is_big_endian = (!(byte[0] == 1));
+      if (is_big_endian) {
+        int remainder = ((offset) % 8);
+        int base = offset - remainder;
+        int shift = 7 - remainder;
+        offset = base + shift;
+      }
+
       // All of this thread's previous memory stores must be complete before
       // this thread stores the step value at this thread's designated byte
       // in the shared synchronization array.

lib/kokkos/core/src/impl/Kokkos_Rendezvous.cpp

@@ -137,6 +137,17 @@ int rendezvous( volatile int64_t * const buffer
                        + ( ( rank & ~mask_byte ) << shift_mem_cycle )
                        + ( sync_offset << shift_byte );
 
+      // Switch designated byte if running on big endian machine
+      volatile uint16_t value = 1;
+      volatile uint8_t* byte = (uint8_t*) &value;
+      volatile bool is_big_endian = (!(byte[0] == 1));
+      if (is_big_endian) {
+        int remainder = ((offset) % 8);
+        int base = offset - remainder;
+        int shift = 7 - remainder;
+        offset = base + shift;
+      }
+
       // All of this thread's previous memory stores must be complete before
       // this thread stores the step value at this thread's designated byte
       // in the shared synchronization array.