./travis/test/prefix66.asm:4: warning: invalid operand size prefix o32, must be o16 [-w+prefix-opsize]
./travis/test/prefix66.asm:7: warning: invalid operand size prefix o16, must be o32 [-w+prefix-opsize]
./travis/test/prefix66.asm:13: warning: invalid operand size prefix o32, must be o16 [-w+prefix-opsize]
./travis/test/prefix66.asm:16: warning: invalid operand size prefix o16, must be o32 [-w+prefix-opsize]
./travis/test/prefix66.asm:22: warning: invalid operand size prefix o32, must be o16 [-w+prefix-opsize]
./travis/test/prefix66.asm:25: warning: invalid operand size prefix o16, must be o32 [-w+prefix-opsize]