1 .text 2 3_start: 4 rex/fxsave (%rax) 5 rex64/fxsave (%rax) 6 rex/fxsave (%r8) 7 rex64/fxsave (%r8) 8 rex/fxsave (,%r8) 9 rex64/fxsave (,%r8) 10 rex/fxsave (%r8,%r8) 11 rex64/fxsave (%r8,%r8) 12 13 .byte 0x41,0x9b,0xdd,0x30 14 fsave (%r8) 15 16 .byte 0x40 17 vmovapd (%rax),%xmm0 18 19# Test prefixes family. 20 rex 21 rex.B 22 rex.X 23 rex.XB 24 rex.R 25 rex.RB 26 rex.RX 27 rex.RXB 28 rex.W 29 rex.WB 30 rex.WX 31 rex.WXB 32 rex.WR 33 rex.WRB 34 rex.WRX 35 rex.WRXB 36# Make sure that the above rex prefix won't become the rex prefix for 37# the padding. 38 rex 39