--- old/src/hotspot/cpu/x86/assembler_x86.cpp 2019-04-08 01:02:42.938051283 -0400 +++ new/src/hotspot/cpu/x86/assembler_x86.cpp 2019-04-08 01:02:42.440022248 -0400 @@ -3099,7 +3099,7 @@ } return; } - if (UseAddressNop && VM_Version::is_amd()) { + if (UseAddressNop && (VM_Version::is_amd() || VM_Version::is_hygon())) { // // Using multi-bytes nops "0x0F 0x1F [address]" for AMD. // 1: 0x90