--- old/src/cpu/sparc/vm/macroAssembler_sparc.cpp	2016-10-19 15:29:35.412116607 +0300
+++ new/src/cpu/sparc/vm/macroAssembler_sparc.cpp	2016-10-19 15:29:35.304113781 +0300
@@ -4261,6 +4261,7 @@
   assert(UseBlockZeroing && VM_Version::has_block_zeroing(), "only works with BIS zeroing");
   Register end = count;
   int cache_line_size = VM_Version::prefetch_data_size();
+  assert(cache_line_size > 0, "cache line size should be known for this code");
   // Minimum count when BIS zeroing can be used since
   // it needs membar which is expensive.
   int block_zero_size  = MAX2(cache_line_size*3, (int)BlockZeroingLowLimit);