diff --git a/llvm/test/MC/X86/I286-64.s b/llvm/test/MC/X86/I286-64.s
diff --git a/llvm/test/MC/X86/I386-32.s b/llvm/test/MC/X86/I386-32.s
diff --git a/llvm/test/MC/X86/I386-64.s b/llvm/test/MC/X86/I386-64.s
diff --git a/llvm/test/MC/X86/I486-32.s b/llvm/test/MC/X86/I486-32.s
@@ -0,0 +1,102 @@
+// RUN: llvm-mc -triple i386-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: bswapl %eax 
+// CHECK: encoding: [0x0f,0xc8]         
+bswapl %eax 
+
+// CHECK: cmpxchgl %eax, 3809469200(%edx,%eax,4) 
+// CHECK: encoding: [0x0f,0xb1,0x84,0x82,0x10,0xe3,0x0f,0xe3]        
+cmpxchgl %eax, 3809469200(%edx,%eax,4) 
+
+// CHECK: cmpxchgl %eax, 485498096(%edx,%eax,4) 
+// CHECK: encoding: [0x0f,0xb1,0x84,0x82,0xf0,0x1c,0xf0,0x1c]        
+cmpxchgl %eax, 485498096(%edx,%eax,4) 
+
+// CHECK: cmpxchgl %eax, 485498096(%edx) 
+// CHECK: encoding: [0x0f,0xb1,0x82,0xf0,0x1c,0xf0,0x1c]        
+cmpxchgl %eax, 485498096(%edx) 
+
+// CHECK: cmpxchgl %eax, 485498096 
+// CHECK: encoding: [0x0f,0xb1,0x05,0xf0,0x1c,0xf0,0x1c]        
+cmpxchgl %eax, 485498096 
+
+// CHECK: cmpxchgl %eax, 64(%edx,%eax) 
+// CHECK: encoding: [0x0f,0xb1,0x44,0x02,0x40]        
+cmpxchgl %eax, 64(%edx,%eax) 
+
+// CHECK: cmpxchgl %eax, %eax 
+// CHECK: encoding: [0x0f,0xb1,0xc0]        
+cmpxchgl %eax, %eax 
+
+// CHECK: cmpxchgl %eax, (%edx) 
+// CHECK: encoding: [0x0f,0xb1,0x02]        
+cmpxchgl %eax, (%edx) 
+
+// CHECK: cpuid 
+// CHECK: encoding: [0x0f,0xa2]          
+cpuid 
+
+// CHECK: invd 
+// CHECK: encoding: [0x0f,0x08]          
+invd 
+
+// CHECK: invlpg -485498096(%edx,%eax,4) 
+// CHECK: encoding: [0x0f,0x01,0xbc,0x82,0x10,0xe3,0x0f,0xe3]         
+invlpg -485498096(%edx,%eax,4) 
+
+// CHECK: invlpg 485498096(%edx,%eax,4) 
+// CHECK: encoding: [0x0f,0x01,0xbc,0x82,0xf0,0x1c,0xf0,0x1c]         
+invlpg 485498096(%edx,%eax,4) 
+
+// CHECK: invlpg 485498096(%edx) 
+// CHECK: encoding: [0x0f,0x01,0xba,0xf0,0x1c,0xf0,0x1c]         
+invlpg 485498096(%edx) 
+
+// CHECK: invlpg 485498096 
+// CHECK: encoding: [0x0f,0x01,0x3d,0xf0,0x1c,0xf0,0x1c]         
+invlpg 485498096 
+
+// CHECK: invlpg 64(%edx,%eax) 
+// CHECK: encoding: [0x0f,0x01,0x7c,0x02,0x40]         
+invlpg 64(%edx,%eax) 
+
+// CHECK: invlpg (%edx) 
+// CHECK: encoding: [0x0f,0x01,0x3a]         
+invlpg (%edx) 
+
+// CHECK: rsm 
+// CHECK: encoding: [0x0f,0xaa]          
+rsm 
+
+// CHECK: wbinvd 
+// CHECK: encoding: [0x0f,0x09]          
+wbinvd 
+
+// CHECK: xaddl %eax, 3809469200(%edx,%eax,4) 
+// CHECK: encoding: [0x0f,0xc1,0x84,0x82,0x10,0xe3,0x0f,0xe3]        
+xaddl %eax, 3809469200(%edx,%eax,4) 
+
+// CHECK: xaddl %eax, 485498096(%edx,%eax,4) 
+// CHECK: encoding: [0x0f,0xc1,0x84,0x82,0xf0,0x1c,0xf0,0x1c]        
+xaddl %eax, 485498096(%edx,%eax,4) 
+
+// CHECK: xaddl %eax, 485498096(%edx) 
+// CHECK: encoding: [0x0f,0xc1,0x82,0xf0,0x1c,0xf0,0x1c]        
+xaddl %eax, 485498096(%edx) 
+
+// CHECK: xaddl %eax, 485498096 
+// CHECK: encoding: [0x0f,0xc1,0x05,0xf0,0x1c,0xf0,0x1c]        
+xaddl %eax, 485498096 
+
+// CHECK: xaddl %eax, 64(%edx,%eax) 
+// CHECK: encoding: [0x0f,0xc1,0x44,0x02,0x40]        
+xaddl %eax, 64(%edx,%eax) 
+
+// CHECK: xaddl %eax, %eax 
+// CHECK: encoding: [0x0f,0xc1,0xc0]        
+xaddl %eax, %eax 
+
+// CHECK: xaddl %eax, (%edx) 
+// CHECK: encoding: [0x0f,0xc1,0x02]        
+xaddl %eax, (%edx) 
+
diff --git a/llvm/test/MC/X86/I486-64.s b/llvm/test/MC/X86/I486-64.s
@@ -0,0 +1,166 @@
+// RUN: llvm-mc -triple x86_64-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: bswapl %r13d 
+// CHECK: encoding: [0x41,0x0f,0xcd]         
+bswapl %r13d 
+
+// CHECK: cmpxchgb %r14b, 485498096 
+// CHECK: encoding: [0x44,0x0f,0xb0,0x34,0x25,0xf0,0x1c,0xf0,0x1c]        
+cmpxchgb %r14b, 485498096 
+
+// CHECK: cmpxchgb %r14b, 64(%rdx) 
+// CHECK: encoding: [0x44,0x0f,0xb0,0x72,0x40]        
+cmpxchgb %r14b, 64(%rdx) 
+
+// CHECK: cmpxchgb %r14b, 64(%rdx,%rax,4) 
+// CHECK: encoding: [0x44,0x0f,0xb0,0x74,0x82,0x40]        
+cmpxchgb %r14b, 64(%rdx,%rax,4) 
+
+// CHECK: cmpxchgb %r14b, -64(%rdx,%rax,4) 
+// CHECK: encoding: [0x44,0x0f,0xb0,0x74,0x82,0xc0]        
+cmpxchgb %r14b, -64(%rdx,%rax,4) 
+
+// CHECK: cmpxchgb %r14b, 64(%rdx,%rax) 
+// CHECK: encoding: [0x44,0x0f,0xb0,0x74,0x02,0x40]        
+cmpxchgb %r14b, 64(%rdx,%rax) 
+
+// CHECK: cmpxchgb %r14b, %r14b 
+// CHECK: encoding: [0x45,0x0f,0xb0,0xf6]        
+cmpxchgb %r14b, %r14b 
+
+// CHECK: cmpxchgb %r14b, (%rdx) 
+// CHECK: encoding: [0x44,0x0f,0xb0,0x32]        
+cmpxchgb %r14b, (%rdx) 
+
+// CHECK: cmpxchgl %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0xb1,0xed]        
+cmpxchgl %r13d, %r13d 
+
+// CHECK: cmpxchgw %r14w, 485498096 
+// CHECK: encoding: [0x66,0x44,0x0f,0xb1,0x34,0x25,0xf0,0x1c,0xf0,0x1c]        
+cmpxchgw %r14w, 485498096 
+
+// CHECK: cmpxchgw %r14w, 64(%rdx) 
+// CHECK: encoding: [0x66,0x44,0x0f,0xb1,0x72,0x40]        
+cmpxchgw %r14w, 64(%rdx) 
+
+// CHECK: cmpxchgw %r14w, 64(%rdx,%rax,4) 
+// CHECK: encoding: [0x66,0x44,0x0f,0xb1,0x74,0x82,0x40]        
+cmpxchgw %r14w, 64(%rdx,%rax,4) 
+
+// CHECK: cmpxchgw %r14w, -64(%rdx,%rax,4) 
+// CHECK: encoding: [0x66,0x44,0x0f,0xb1,0x74,0x82,0xc0]        
+cmpxchgw %r14w, -64(%rdx,%rax,4) 
+
+// CHECK: cmpxchgw %r14w, 64(%rdx,%rax) 
+// CHECK: encoding: [0x66,0x44,0x0f,0xb1,0x74,0x02,0x40]        
+cmpxchgw %r14w, 64(%rdx,%rax) 
+
+// CHECK: cmpxchgw %r14w, %r14w 
+// CHECK: encoding: [0x66,0x45,0x0f,0xb1,0xf6]        
+cmpxchgw %r14w, %r14w 
+
+// CHECK: cmpxchgw %r14w, (%rdx) 
+// CHECK: encoding: [0x66,0x44,0x0f,0xb1,0x32]        
+cmpxchgw %r14w, (%rdx) 
+
+// CHECK: cpuid 
+// CHECK: encoding: [0x0f,0xa2]          
+cpuid 
+
+// CHECK: invd 
+// CHECK: encoding: [0x0f,0x08]          
+invd 
+
+// CHECK: invlpg 485498096 
+// CHECK: encoding: [0x0f,0x01,0x3c,0x25,0xf0,0x1c,0xf0,0x1c]         
+invlpg 485498096 
+
+// CHECK: invlpg 64(%rdx) 
+// CHECK: encoding: [0x0f,0x01,0x7a,0x40]         
+invlpg 64(%rdx) 
+
+// CHECK: invlpg 64(%rdx,%rax,4) 
+// CHECK: encoding: [0x0f,0x01,0x7c,0x82,0x40]         
+invlpg 64(%rdx,%rax,4) 
+
+// CHECK: invlpg -64(%rdx,%rax,4) 
+// CHECK: encoding: [0x0f,0x01,0x7c,0x82,0xc0]         
+invlpg -64(%rdx,%rax,4) 
+
+// CHECK: invlpg 64(%rdx,%rax) 
+// CHECK: encoding: [0x0f,0x01,0x7c,0x02,0x40]         
+invlpg 64(%rdx,%rax) 
+
+// CHECK: invlpg (%rdx) 
+// CHECK: encoding: [0x0f,0x01,0x3a]         
+invlpg (%rdx) 
+
+// CHECK: rsm 
+// CHECK: encoding: [0x0f,0xaa]          
+rsm 
+
+// CHECK: wbinvd 
+// CHECK: encoding: [0x0f,0x09]          
+wbinvd 
+
+// CHECK: xaddb %r14b, 485498096 
+// CHECK: encoding: [0x44,0x0f,0xc0,0x34,0x25,0xf0,0x1c,0xf0,0x1c]        
+xaddb %r14b, 485498096 
+
+// CHECK: xaddb %r14b, 64(%rdx) 
+// CHECK: encoding: [0x44,0x0f,0xc0,0x72,0x40]        
+xaddb %r14b, 64(%rdx) 
+
+// CHECK: xaddb %r14b, 64(%rdx,%rax,4) 
+// CHECK: encoding: [0x44,0x0f,0xc0,0x74,0x82,0x40]        
+xaddb %r14b, 64(%rdx,%rax,4) 
+
+// CHECK: xaddb %r14b, -64(%rdx,%rax,4) 
+// CHECK: encoding: [0x44,0x0f,0xc0,0x74,0x82,0xc0]        
+xaddb %r14b, -64(%rdx,%rax,4) 
+
+// CHECK: xaddb %r14b, 64(%rdx,%rax) 
+// CHECK: encoding: [0x44,0x0f,0xc0,0x74,0x02,0x40]        
+xaddb %r14b, 64(%rdx,%rax) 
+
+// CHECK: xaddb %r14b, %r14b 
+// CHECK: encoding: [0x45,0x0f,0xc0,0xf6]        
+xaddb %r14b, %r14b 
+
+// CHECK: xaddb %r14b, (%rdx) 
+// CHECK: encoding: [0x44,0x0f,0xc0,0x32]        
+xaddb %r14b, (%rdx) 
+
+// CHECK: xaddl %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0xc1,0xed]        
+xaddl %r13d, %r13d 
+
+// CHECK: xaddw %r14w, 485498096 
+// CHECK: encoding: [0x66,0x44,0x0f,0xc1,0x34,0x25,0xf0,0x1c,0xf0,0x1c]        
+xaddw %r14w, 485498096 
+
+// CHECK: xaddw %r14w, 64(%rdx) 
+// CHECK: encoding: [0x66,0x44,0x0f,0xc1,0x72,0x40]        
+xaddw %r14w, 64(%rdx) 
+
+// CHECK: xaddw %r14w, 64(%rdx,%rax,4) 
+// CHECK: encoding: [0x66,0x44,0x0f,0xc1,0x74,0x82,0x40]        
+xaddw %r14w, 64(%rdx,%rax,4) 
+
+// CHECK: xaddw %r14w, -64(%rdx,%rax,4) 
+// CHECK: encoding: [0x66,0x44,0x0f,0xc1,0x74,0x82,0xc0]        
+xaddw %r14w, -64(%rdx,%rax,4) 
+
+// CHECK: xaddw %r14w, 64(%rdx,%rax) 
+// CHECK: encoding: [0x66,0x44,0x0f,0xc1,0x74,0x02,0x40]        
+xaddw %r14w, 64(%rdx,%rax) 
+
+// CHECK: xaddw %r14w, %r14w 
+// CHECK: encoding: [0x66,0x45,0x0f,0xc1,0xf6]        
+xaddw %r14w, %r14w 
+
+// CHECK: xaddw %r14w, (%rdx) 
+// CHECK: encoding: [0x66,0x44,0x0f,0xc1,0x32]        
+xaddw %r14w, (%rdx) 
+
diff --git a/llvm/test/MC/X86/I86-32.s b/llvm/test/MC/X86/I86-32.s
diff --git a/llvm/test/MC/X86/I86-64.s b/llvm/test/MC/X86/I86-64.s
diff --git a/llvm/test/MC/X86/MMX-32.s b/llvm/test/MC/X86/MMX-32.s
diff --git a/llvm/test/MC/X86/MMX-64.s b/llvm/test/MC/X86/MMX-64.s
diff --git a/llvm/test/MC/X86/PPRO-32.s b/llvm/test/MC/X86/PPRO-32.s
@@ -0,0 +1,126 @@
+// RUN: llvm-mc -triple i386-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: cmovael %eax, %eax 
+// CHECK: encoding: [0x0f,0x43,0xc0]        
+cmovael %eax, %eax 
+
+// CHECK: cmoval %eax, %eax 
+// CHECK: encoding: [0x0f,0x47,0xc0]        
+cmoval %eax, %eax 
+
+// CHECK: cmovbel %eax, %eax 
+// CHECK: encoding: [0x0f,0x46,0xc0]        
+cmovbel %eax, %eax 
+
+// CHECK: cmovbl %eax, %eax 
+// CHECK: encoding: [0x0f,0x42,0xc0]        
+cmovbl %eax, %eax 
+
+// CHECK: cmovel %eax, %eax 
+// CHECK: encoding: [0x0f,0x44,0xc0]        
+cmovel %eax, %eax 
+
+// CHECK: cmovgel %eax, %eax 
+// CHECK: encoding: [0x0f,0x4d,0xc0]        
+cmovgel %eax, %eax 
+
+// CHECK: cmovgl %eax, %eax 
+// CHECK: encoding: [0x0f,0x4f,0xc0]        
+cmovgl %eax, %eax 
+
+// CHECK: cmovlel %eax, %eax 
+// CHECK: encoding: [0x0f,0x4e,0xc0]        
+cmovlel %eax, %eax 
+
+// CHECK: cmovll %eax, %eax 
+// CHECK: encoding: [0x0f,0x4c,0xc0]        
+cmovll %eax, %eax 
+
+// CHECK: cmovnel %eax, %eax 
+// CHECK: encoding: [0x0f,0x45,0xc0]        
+cmovnel %eax, %eax 
+
+// CHECK: cmovnol %eax, %eax 
+// CHECK: encoding: [0x0f,0x41,0xc0]        
+cmovnol %eax, %eax 
+
+// CHECK: cmovnpl %eax, %eax 
+// CHECK: encoding: [0x0f,0x4b,0xc0]        
+cmovnpl %eax, %eax 
+
+// CHECK: cmovnsl %eax, %eax 
+// CHECK: encoding: [0x0f,0x49,0xc0]        
+cmovnsl %eax, %eax 
+
+// CHECK: cmovol %eax, %eax 
+// CHECK: encoding: [0x0f,0x40,0xc0]        
+cmovol %eax, %eax 
+
+// CHECK: cmovpl %eax, %eax 
+// CHECK: encoding: [0x0f,0x4a,0xc0]        
+cmovpl %eax, %eax 
+
+// CHECK: cmovsl %eax, %eax 
+// CHECK: encoding: [0x0f,0x48,0xc0]        
+cmovsl %eax, %eax 
+
+// CHECK: fcmovbe %st(4), %st(0) 
+// CHECK: encoding: [0xda,0xd4]        
+fcmovbe %st(4), %st(0) 
+
+// CHECK: fcmovb %st(4), %st(0) 
+// CHECK: encoding: [0xda,0xc4]        
+fcmovb %st(4), %st(0) 
+
+// CHECK: fcmove %st(4), %st(0) 
+// CHECK: encoding: [0xda,0xcc]        
+fcmove %st(4), %st(0) 
+
+// CHECK: fcmovnbe %st(4), %st(0) 
+// CHECK: encoding: [0xdb,0xd4]        
+fcmovnbe %st(4), %st(0) 
+
+// CHECK: fcmovnb %st(4), %st(0) 
+// CHECK: encoding: [0xdb,0xc4]        
+fcmovnb %st(4), %st(0) 
+
+// CHECK: fcmovne %st(4), %st(0) 
+// CHECK: encoding: [0xdb,0xcc]        
+fcmovne %st(4), %st(0) 
+
+// CHECK: fcmovnu %st(4), %st(0) 
+// CHECK: encoding: [0xdb,0xdc]        
+fcmovnu %st(4), %st(0) 
+
+// CHECK: fcmovu %st(4), %st(0) 
+// CHECK: encoding: [0xda,0xdc]        
+fcmovu %st(4), %st(0) 
+
+// CHECK: fcomi %st(4) 
+// CHECK: encoding: [0xdb,0xf4]         
+fcomi %st(4) 
+
+// CHECK: fcompi %st(4) 
+// CHECK: encoding: [0xdf,0xf4]         
+fcompi %st(4) 
+
+// CHECK: fucomi %st(4) 
+// CHECK: encoding: [0xdb,0xec]         
+fucomi %st(4) 
+
+// CHECK: fucompi %st(4) 
+// CHECK: encoding: [0xdf,0xec]         
+fucompi %st(4) 
+
+// CHECK: sysenter 
+// CHECK: encoding: [0x0f,0x34]          
+sysenter 
+
+// CHECK: sysexitl 
+// CHECK: encoding: [0x0f,0x35]          
+sysexitl 
+
+// CHECK: ud2 
+// CHECK: encoding: [0x0f,0x0b]          
+ud2 
+
diff --git a/llvm/test/MC/X86/PPRO-64.s b/llvm/test/MC/X86/PPRO-64.s
@@ -0,0 +1,130 @@
+// RUN: llvm-mc -triple x86_64-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: cmovael %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x43,0xed]        
+cmovael %r13d, %r13d 
+
+// CHECK: cmoval %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x47,0xed]        
+cmoval %r13d, %r13d 
+
+// CHECK: cmovbel %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x46,0xed]        
+cmovbel %r13d, %r13d 
+
+// CHECK: cmovbl %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x42,0xed]        
+cmovbl %r13d, %r13d 
+
+// CHECK: cmovel %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x44,0xed]        
+cmovel %r13d, %r13d 
+
+// CHECK: cmovgel %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x4d,0xed]        
+cmovgel %r13d, %r13d 
+
+// CHECK: cmovgl %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x4f,0xed]        
+cmovgl %r13d, %r13d 
+
+// CHECK: cmovlel %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x4e,0xed]        
+cmovlel %r13d, %r13d 
+
+// CHECK: cmovll %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x4c,0xed]        
+cmovll %r13d, %r13d 
+
+// CHECK: cmovnel %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x45,0xed]        
+cmovnel %r13d, %r13d 
+
+// CHECK: cmovnol %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x41,0xed]        
+cmovnol %r13d, %r13d 
+
+// CHECK: cmovnpl %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x4b,0xed]        
+cmovnpl %r13d, %r13d 
+
+// CHECK: cmovnsl %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x49,0xed]        
+cmovnsl %r13d, %r13d 
+
+// CHECK: cmovol %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x40,0xed]        
+cmovol %r13d, %r13d 
+
+// CHECK: cmovpl %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x4a,0xed]        
+cmovpl %r13d, %r13d 
+
+// CHECK: cmovsl %r13d, %r13d 
+// CHECK: encoding: [0x45,0x0f,0x48,0xed]        
+cmovsl %r13d, %r13d 
+
+// CHECK: fcmovbe %st(4), %st(0) 
+// CHECK: encoding: [0xda,0xd4]        
+fcmovbe %st(4), %st(0) 
+
+// CHECK: fcmovb %st(4), %st(0) 
+// CHECK: encoding: [0xda,0xc4]        
+fcmovb %st(4), %st(0) 
+
+// CHECK: fcmove %st(4), %st(0) 
+// CHECK: encoding: [0xda,0xcc]        
+fcmove %st(4), %st(0) 
+
+// CHECK: fcmovnbe %st(4), %st(0) 
+// CHECK: encoding: [0xdb,0xd4]        
+fcmovnbe %st(4), %st(0) 
+
+// CHECK: fcmovnb %st(4), %st(0) 
+// CHECK: encoding: [0xdb,0xc4]        
+fcmovnb %st(4), %st(0) 
+
+// CHECK: fcmovne %st(4), %st(0) 
+// CHECK: encoding: [0xdb,0xcc]        
+fcmovne %st(4), %st(0) 
+
+// CHECK: fcmovnu %st(4), %st(0) 
+// CHECK: encoding: [0xdb,0xdc]        
+fcmovnu %st(4), %st(0) 
+
+// CHECK: fcmovu %st(4), %st(0) 
+// CHECK: encoding: [0xda,0xdc]        
+fcmovu %st(4), %st(0) 
+
+// CHECK: fcomi %st(4) 
+// CHECK: encoding: [0xdb,0xf4]         
+fcomi %st(4) 
+
+// CHECK: fcompi %st(4) 
+// CHECK: encoding: [0xdf,0xf4]         
+fcompi %st(4) 
+
+// CHECK: fucomi %st(4) 
+// CHECK: encoding: [0xdb,0xec]         
+fucomi %st(4) 
+
+// CHECK: fucompi %st(4) 
+// CHECK: encoding: [0xdf,0xec]         
+fucompi %st(4) 
+
+// CHECK: sysenter 
+// CHECK: encoding: [0x0f,0x34]          
+sysenter 
+
+// CHECK: sysexitl 
+// CHECK: encoding: [0x0f,0x35]          
+sysexitl 
+
+// CHECK: sysexitq 
+// CHECK: encoding: [0x48,0x0f,0x35]          
+sysexitq 
+
+// CHECK: ud2 
+// CHECK: encoding: [0x0f,0x0b]          
+ud2 
+