11 rex64/fxsave (%r8,%r8)
13 rex.w add (%rax,%rax), %eax
14 rex.r add (%rax,%rax), %eax
15 rex.b add (%rax,%rax), %eax
16 rex.x add (%rax,%rax), %eax
18 rex.w add (%r8,%rax), %eax
19 rex.r add (%rax,%r8), %eax
20 rex.b add (%rax,%rax), %r8d
21 rex.x add (%rax,%rax), %rax
23 .byte 0x41,0x9b,0xdd,0x30
29 # Test prefixes family.
46 # Make sure that the above rex prefix won't become the rex prefix for