1 .text 2 .allow_index_reg 3 # All the following should be illegal for x86-64 4 aaa # illegal 5 aad # illegal 6 aam # illegal 7 aas # illegal 8 arpl %ax,%ax # illegal 9 bound %eax,(%rax) # illegal 10 calll *%eax # 32-bit data size not allowed 11 calll *(%ax) # 32-bit data size not allowed 12 calll *(%eax) # 32-bit data size not allowed 13 calll *(%r8) # 32-bit data size not allowed 14 calll *(%rax) # 32-bit data size not allowed 15 callq *(%ax) # no 16-bit addressing 16 daa # illegal 17 das # illegal 18 enterl $0,$0 # can't have 32-bit stack operands 19 into # illegal 20 foo: jcxz foo # No prefix exists to select CX as a counter 21 jmpl *%eax # 32-bit data size not allowed 22 jmpl *(%ax) # 32-bit data size not allowed 23 jmpl *(%eax) # 32-bit data size not allowed 24 jmpl *(%r8) # 32-bit data size not allowed 25 jmpl *(%rax) # 32-bit data size not allowed 26 jmpq *(%ax) # no 16-bit addressing 27 lcalll $0,$0 # illegal 28 lcallq $0,$0 # illegal 29 ldsl %eax,(%rax) # illegal 30 ldsq %rax,(%rax) # illegal 31 lesl %eax,(%rax) # illegal 32 lesq %rax,(%rax) # illegal 33 ljmpl $0,$0 # illegal 34 ljmpq $0,$0 # illegal 35 ljmpq *(%rax) # 64-bit data size not allowed 36 loopw foo # No prefix exists to select CX as a counter 37 loopew foo # No prefix exists to select CX as a counter 38 loopnew foo # No prefix exists to select CX as a counter 39 loopnzw foo # No prefix exists to select CX as a counter 40 loopzw foo # No prefix exists to select CX as a counter 41 leavel # can't have 32-bit stack operands 42 pop %ds # illegal 43 pop %es # illegal 44 pop %ss # illegal 45 popa # illegal 46 popl %eax # can't have 32-bit stack operands 47 push %cs # illegal 48 push %ds # illegal 49 push %es # illegal 50 push %ss # illegal 51 pusha # illegal 52 pushl %eax # can't have 32-bit stack operands 53 pushfl # can't have 32-bit stack operands 54 popfl # can't have 32-bit stack operands 55 retl # can't have 32-bit stack operands 56 insertq $4,$2,%xmm2,%ebx # The last operand must be XMM register. 57 fnstsw %eax 58 fnstsw %al 59 fstsw %eax 60 fstsw %al 61 in $8,%rax 62 out %rax,$8 63 movzxl (%rax),%rax 64 movnti %ax, (%rax) 65 movntiw %ax, (%rax) 66 67 mov 0x80000000(%rax),%ebx 68 mov 0x80000000,%ebx 69 70 add (%rip,%rsi), %eax 71 add (%rsi,%rip), %eax 72 add (,%rip), %eax 73 add (%eip,%esi), %eax 74 add (%esi,%eip), %eax 75 add (,%eip), %eax 76 add (%rsi,%esi), %eax 77 add (%esi,%rsi), %eax 78 add (%eiz), %eax 79 add (%riz), %eax 80 add (%rax), %riz 81 add (%rax), %eiz 82 83 .intel_syntax noprefix 84 cmpxchg16b dword ptr [rax] # Must be oword 85 movq xmm1, XMMWORD PTR [rsp] 86 movq xmm1, DWORD PTR [rsp] 87 movq xmm1, WORD PTR [rsp] 88 movq xmm1, BYTE PTR [rsp] 89 movq XMMWORD PTR [rsp],xmm1 90 movq DWORD PTR [rsp],xmm1 91 movq WORD PTR [rsp],xmm1 92 movq BYTE PTR [rsp],xmm1 93 fnstsw eax 94 fnstsw al 95 fstsw eax 96 fstsw al 97 in rax,8 98 out 8,rax 99 movsx ax, [rax] 100 movsx eax, [rax] 101 movsx rax, [rax] 102 movzx ax, [rax] 103 movzx eax, [rax] 104 movzx rax, [rax] 105 movnti word ptr [rax], ax 106 calld eax # 32-bit data size not allowed 107 calld [ax] # 32-bit data size not allowed 108 calld [eax] # 32-bit data size not allowed 109 calld [r8] # 32-bit data size not allowed 110 calld [rax] # 32-bit data size not allowed 111 callq [ax] # no 16-bit addressing 112 jmpd eax # 32-bit data size not allowed 113 jmpd [ax] # 32-bit data size not allowed 114 jmpd [eax] # 32-bit data size not allowed 115 jmpd [r8] # 32-bit data size not allowed 116 jmpd [rax] # 32-bit data size not allowed 117 jmpq [ax] # no 16-bit addressing 118
