xref: /external/llvm/test/MC/X86/x86-64.s

// RUN: llvm-mc -triple x86_64-unknown-unknown -show-encoding %s > %t 2> %t.err
// RUN: FileCheck < %t %s
// RUN: FileCheck --check-prefix=CHECK-STDERR < %t.err %s


// Suffix inference:

// CHECK: addl $0, %eax
        add $0, %eax
// CHECK: addb $255, %al
        add $0xFF, %al
// CHECK: orq %rax, %rdx
        or %rax, %rdx
// CHECK: shlq $3, %rax
        shl $3, %rax


// CHECK: subb %al, %al
        subb %al, %al

// CHECK: addl $24, %eax
        addl $24, %eax

// CHECK: movl %eax, 10(%ebp)
        movl %eax, 10(%ebp)
// CHECK: movl %eax, 10(%ebp,%ebx)
        movl %eax, 10(%ebp, %ebx)
// CHECK: movl %eax, 10(%ebp,%ebx,4)
        movl %eax, 10(%ebp, %ebx, 4)
// CHECK: movl %eax, 10(,%ebx,4)
        movl %eax, 10(, %ebx, 4)

// CHECK: movl 0, %eax
        movl 0, %eax
// CHECK: movl $0, %eax
        movl $0, %eax

// CHECK: ret
        ret

// FIXME: Check that this matches SUB32ri8
// CHECK: subl $1, %eax
        subl $1, %eax

// FIXME: Check that this matches SUB32ri8
// CHECK: subl $-1, %eax
        subl $-1, %eax

// FIXME: Check that this matches SUB32ri
// CHECK: subl $256, %eax
        subl $256, %eax

// FIXME: Check that this matches XOR64ri8
// CHECK: xorq $1, %rax
        xorq $1, %rax

// FIXME: Check that this matches XOR64ri32
// CHECK: xorq $256, %rax
        xorq $256, %rax

// FIXME: Check that this matches SUB8rr
// CHECK: subb %al, %bl
        subb %al, %bl

// FIXME: Check that this matches SUB16rr
// CHECK: subw %ax, %bx
        subw %ax, %bx

// FIXME: Check that this matches SUB32rr
// CHECK: subl %eax, %ebx
        subl %eax, %ebx

// FIXME: Check that this matches the correct instruction.
// CHECK: callq *%rax
        call *%rax

// FIXME: Check that this matches the correct instruction.
// CHECK: shldl %cl, %eax, %ebx
        shldl %cl, %eax, %ebx

// CHECK: shll $2, %eax
        shll $2, %eax

// CHECK: shll $2, %eax
        sall $2, %eax

// CHECK: rep
// CHECK: insb
        rep;insb

// CHECK: rep
// CHECK: outsb
        rep;outsb

// CHECK: rep
// CHECK: movsb
        rep;movsb


// rdar://8470918
smovb // CHECK: movsb
smovw // CHECK: movsw
smovl // CHECK: movsl
smovq // CHECK: movsq

// rdar://8456361
// CHECK: rep
// CHECK: movsl
        rep movsd

// CHECK: rep
// CHECK: lodsb
        rep;lodsb

// CHECK: rep
// CHECK: stosb
        rep;stosb

// NOTE: repz and repe have the same opcode as rep
// CHECK: rep
// CHECK: cmpsb
        repz;cmpsb

// NOTE: repnz has the same opcode as repne
// CHECK: repne
// CHECK: cmpsb
        repnz;cmpsb

// NOTE: repe and repz have the same opcode as rep
// CHECK: rep
// CHECK: scasb
        repe;scasb

// CHECK: repne
// CHECK: scasb
        repne;scasb

// CHECK: lock
// CHECK: cmpxchgb %al, (%ebx)
        lock;cmpxchgb %al, 0(%ebx)

// CHECK: cs
// CHECK: movb (%eax), %al
        cs;movb 0(%eax), %al

// CHECK: ss
// CHECK: movb (%eax), %al
        ss;movb 0(%eax), %al

// CHECK: ds
// CHECK: movb (%eax), %al
        ds;movb 0(%eax), %al

// CHECK: es
// CHECK: movb (%eax), %al
        es;movb 0(%eax), %al

// CHECK: fs
// CHECK: movb (%eax), %al
        fs;movb 0(%eax), %al

// CHECK: gs
// CHECK: movb (%eax), %al
        gs;movb 0(%eax), %al

// CHECK: fadd %st(0)
// CHECK: fadd %st(1)
// CHECK: fadd %st(7)

fadd %st(0)
fadd %st(1)
fadd %st(7)

// CHECK: leal 0, %eax
        leal 0, %eax

// rdar://7986634 - Insensitivity on opcodes.
// CHECK: int3
INT3


// Allow scale factor without index register.
// CHECK: movaps	%xmm3, (%esi)
// CHECK-STDERR: warning: scale factor without index register is ignored
movaps %xmm3, (%esi, 2)

// CHECK: imull $12, %eax, %eax
imul $12, %eax

// CHECK: imull %ecx, %eax
imull %ecx, %eax


// rdar://8208481
// CHECK: outb	%al, $161
outb	%al, $161
// CHECK: outw	%ax, $128
outw	%ax, $128
// CHECK: inb	$161, %al
inb	$161, %al

// rdar://8017621
// CHECK: pushq	$1
push $1

// rdar://8017530
// CHECK: sldtw	4
sldt	4

// rdar://8208499
// CHECK: cmovnew	%bx, %ax
cmovnz %bx, %ax
// CHECK: cmovneq	%rbx, %rax
cmovnzq %rbx, %rax


// rdar://8407928
// CHECK: inb	$127, %al
// CHECK: inw	%dx, %ax
// CHECK: outb	%al, $127
// CHECK: outw	%ax, %dx
// CHECK: inl	%dx, %eax
inb	$0x7f
inw	%dx
outb	$0x7f
outw	%dx
inl	%dx


// PR8114
// CHECK: outb	%al, %dx
// CHECK: outw	%ax, %dx
// CHECK: outl	%eax, %dx

out %al, (%dx)
out %ax, (%dx)
outl %eax, (%dx)


// rdar://8431422

// CHECK: fxch	%st(1)
// CHECK: fucom	%st(1)
// CHECK: fucomp	%st(1)
// CHECK: faddp	%st(1)
// CHECK: faddp	%st(0)
// CHECK: fsubp	%st(1)
// CHECK: fsubrp	%st(1)
// CHECK: fmulp	%st(1)
// CHECK: fdivp	%st(1)
// CHECK: fdivrp	%st(1)

fxch
fucom
fucomp
faddp
faddp %st
fsubp
fsubrp
fmulp
fdivp
fdivrp

// CHECK: fcomi	%st(1), %st(0)
// CHECK: fcomi	%st(2), %st(0)
// CHECK: fucomi	%st(1), %st(0)
// CHECK: fucomi	%st(2), %st(0)
// CHECK: fucomi	%st(2), %st(0)

fcomi
fcomi	%st(2)
fucomi
fucomi	%st(2)
fucomi	%st(2), %st

// CHECK: fnstsw %ax
// CHECK: fnstsw %ax
// CHECK: fnstsw %ax
// CHECK: fnstsw %ax

fnstsw
fnstsw %ax
fnstsw %eax
fnstsw %al

// rdar://8431880
// CHECK: rclb	$1, %bl
// CHECK: rcll	$1, 3735928559(%ebx,%ecx,8)
// CHECK: rcrl	$1, %ecx
// CHECK: rcrl	$1, 305419896

rcl	%bl
rcll	0xdeadbeef(%ebx,%ecx,8)
rcr	%ecx
rcrl	0x12345678

// rdar://8418316
// CHECK: shldw	$1, %bx, %bx
// CHECK: shldw	$1, %bx, %bx
// CHECK: shrdw	$1, %bx, %bx
// CHECK: shrdw	$1, %bx, %bx

shld	%bx,%bx
shld	$1, %bx,%bx
shrd	%bx,%bx
shrd	$1, %bx,%bx

// CHECK: sldtl	%ecx
// CHECK: encoding: [0x0f,0x00,0xc1]
// CHECK: sldtw	%cx
// CHECK: encoding: [0x66,0x0f,0x00,0xc1]

sldt	%ecx
sldt	%cx

// CHECK: lcalll	*3135175374
// CHECK: ljmpl	*3135175374
lcall	*0xbadeface
ljmp	*0xbadeface


// rdar://8444631
// CHECK: enter	$31438, $0
// CHECK: encoding: [0xc8,0xce,0x7a,0x00]
// CHECK: enter	$31438, $1
// CHECK: encoding: [0xc8,0xce,0x7a,0x01]
// CHECK: enter	$31438, $127
// CHECK: encoding: [0xc8,0xce,0x7a,0x7f]
enter $0x7ace,$0
enter $0x7ace,$1
enter $0x7ace,$0x7f


// rdar://8456389
// CHECK: fstps	(%eax)
// CHECK: encoding: [0x67,0xd9,0x18]
fstp	(%eax)

// rdar://8456364
// CHECK: movw	%cs, %ax
mov %CS, %ax

// rdar://8456391
fcmovb %st(1), %st(0)   // CHECK: fcmovb	%st(1), %st(0)
fcmove %st(1), %st(0)   // CHECK: fcmove	%st(1), %st(0)
fcmovbe %st(1), %st(0)  // CHECK: fcmovbe	%st(1), %st(0)
fcmovu %st(1), %st(0)   // CHECK: fcmovu	 %st(1), %st(0)

fcmovnb %st(1), %st(0)  // CHECK: fcmovnb	%st(1), %st(0)
fcmovne %st(1), %st(0)  // CHECK: fcmovne	%st(1), %st(0)
fcmovnbe %st(1), %st(0) // CHECK: fcmovnbe	%st(1), %st(0)
fcmovnu %st(1), %st(0)  // CHECK: fcmovnu	%st(1), %st(0)

fcmovnae %st(1), %st(0) // CHECK: fcmovb	%st(1), %st(0)
fcmovna %st(1), %st(0)  // CHECK: fcmovbe	%st(1), %st(0)

fcmovae %st(1), %st(0)  // CHECK: fcmovnb	%st(1), %st(0)
fcmova %st(1), %st(0)   // CHECK: fcmovnbe	%st(1), %st(0)

// rdar://8456417
.byte 88 + 1 & 15  // CHECK: .byte	9

// rdar://8456412
mov %rdx, %cr0
// CHECK: movq	%rdx, %cr0
// CHECK: encoding: [0x0f,0x22,0xc2]
mov %rdx, %cr4
// CHECK: movq	%rdx, %cr4
// CHECK: encoding: [0x0f,0x22,0xe2]
mov %rdx, %cr8
// CHECK: movq	%rdx, %cr8
// CHECK: encoding: [0x44,0x0f,0x22,0xc2]
mov %rdx, %cr15
// CHECK: movq	%rdx, %cr15
// CHECK: encoding: [0x44,0x0f,0x22,0xfa]

// rdar://8456371 - Handle commutable instructions written backward.
// CHECK: 	faddp	%st(1)
// CHECK:	fmulp	%st(2)
faddp %st, %st(1)
fmulp %st, %st(2)

// rdar://8468087 - Encode these accurately, they are not synonyms.
// CHECK: fmul	%st(0), %st(1)
// CHECK: encoding: [0xdc,0xc9]
// CHECK: fmul	%st(1)
// CHECK: encoding: [0xd8,0xc9]
fmul %st, %st(1)
fmul %st(1), %st

// CHECK: fadd	%st(0), %st(1)
// CHECK: encoding: [0xdc,0xc1]
// CHECK: fadd	%st(1)
// CHECK: encoding: [0xd8,0xc1]
fadd %st, %st(1)
fadd %st(1), %st


// rdar://8416805
// CHECK: xorb	%al, %al
// CHECK: encoding: [0x30,0xc0]
// CHECK: xorw	%di, %di
// CHECK: encoding: [0x66,0x31,0xff]
// CHECK: xorl	%esi, %esi
// CHECK: encoding: [0x31,0xf6]
// CHECK: xorq	%rsi, %rsi
// CHECK: encoding: [0x48,0x31,0xf6]
clrb    %al
clr    %di
clr    %esi
clr    %rsi

// rdar://8456378
cltq  // CHECK: cltq
cdqe  // CHECK: cltq
cwde  // CHECK: cwtl
cwtl  // CHECK: cwtl

// rdar://8416805
cbw   // CHECK: cbtw
cwd   // CHECK: cwtd
cdq   // CHECK: cltd

// rdar://8456378 and PR7557 - fstsw
fstsw %ax
// CHECK: wait
// CHECK: fnstsw %ax
fstsw (%rax)
// CHECK: wait
// CHECK: fnstsw (%rax)

// PR8259
fstcw (%rsp)
// CHECK: wait
// CHECK: fnstcw (%rsp)

// PR8259
fstcw (%rsp)
// CHECK: wait
// CHECK: fnstcw (%rsp)

// PR8258
finit
// CHECK: wait
// CHECK: fninit

fsave	32493
// CHECK: wait
// CHECK: fnsave 32493


// rdar://8456382 - cvtsd2si support.
cvtsd2si	%xmm1, %rax
// CHECK: cvtsd2siq	%xmm1, %rax
// CHECK: encoding: [0xf2,0x48,0x0f,0x2d,0xc1]
cvtsd2si	%xmm1, %eax
// CHECK: cvtsd2sil	%xmm1, %eax
// CHECK: encoding: [0xf2,0x0f,0x2d,0xc1]

cvtsd2siq %xmm0, %rax // CHECK: cvtsd2siq	%xmm0, %rax
cvtsd2sil %xmm0, %eax // CHECK: cvtsd2sil	%xmm0, %eax
cvtsd2si %xmm0, %rax  // CHECK: cvtsd2siq	%xmm0, %rax


cvttpd2dq %xmm1, %xmm0  // CHECK: cvttpd2dq %xmm1, %xmm0
cvttpd2dq (%rax), %xmm0 // CHECK: cvttpd2dq (%rax), %xmm0

cvttps2dq %xmm1, %xmm0  // CHECK: cvttps2dq %xmm1, %xmm0
cvttps2dq (%rax), %xmm0 // CHECK: cvttps2dq (%rax), %xmm0

// rdar://8456376 - llvm-mc rejects 'roundss'
roundss $0xE, %xmm0, %xmm0 // CHECK: encoding: [0x66,0x0f,0x3a,0x0a,0xc0,0x0e]
roundps $0xE, %xmm0, %xmm0 // CHECK: encoding: [0x66,0x0f,0x3a,0x08,0xc0,0x0e]
roundsd $0xE, %xmm0, %xmm0 // CHECK: encoding: [0x66,0x0f,0x3a,0x0b,0xc0,0x0e]
roundpd $0xE, %xmm0, %xmm0 // CHECK: encoding: [0x66,0x0f,0x3a,0x09,0xc0,0x0e]


// rdar://8482675 - 32-bit mem operand support in 64-bit mode (0x67 prefix)
leal	8(%eax), %esi
// CHECK: leal	8(%eax), %esi
// CHECK: encoding: [0x67,0x8d,0x70,0x08]
leaq	8(%eax), %rsi
// CHECK: leaq	8(%eax), %rsi
// CHECK: encoding: [0x67,0x48,0x8d,0x70,0x08]
leaq	8(%rax), %rsi
// CHECK: leaq	8(%rax), %rsi
// CHECK: encoding: [0x48,0x8d,0x70,0x08]


cvttpd2dq	0xdeadbeef(%ebx,%ecx,8),%xmm5
// CHECK: cvttpd2dq	3735928559(%ebx,%ecx,8), %xmm5
// CHECK: encoding: [0x67,0x66,0x0f,0xe6,0xac,0xcb,0xef,0xbe,0xad,0xde]

// rdar://8490728 - llvm-mc rejects 'movmskpd'
movmskpd	%xmm6, %rax
// CHECK: movmskpd	%xmm6, %rax
// CHECK: encoding: [0x66,0x48,0x0f,0x50,0xc6]
movmskpd	%xmm6, %eax
// CHECK: movmskpd	%xmm6, %eax
// CHECK: encoding: [0x66,0x0f,0x50,0xc6]

// rdar://8491845 - Gas supports commuted forms of non-commutable instructions.
fdivrp %st(0), %st(1) // CHECK: encoding: [0xde,0xf9]
fdivrp %st(1), %st(0) // CHECK: encoding: [0xde,0xf9]

fsubrp %ST(0), %ST(1) // CHECK: encoding: [0xde,0xe9]
fsubrp %ST(1), %ST(0) // CHECK: encoding: [0xde,0xe9]


movl	foo(%rip), %eax
// CHECK: movl	foo(%rip), %eax
// CHECK: encoding: [0x8b,0x05,A,A,A,A]
// CHECK: fixup A - offset: 2, value: foo-4, kind: reloc_riprel_4byte

movb	$12, foo(%rip)
// CHECK: movb	$12, foo(%rip)
// CHECK: encoding: [0xc6,0x05,A,A,A,A,0x0c]
// CHECK:    fixup A - offset: 2, value: foo-5, kind: reloc_riprel_4byte

movw	$12, foo(%rip)
// CHECK: movw	$12, foo(%rip)
// CHECK: encoding: [0x66,0xc7,0x05,A,A,A,A,0x0c,0x00]
// CHECK:    fixup A - offset: 3, value: foo-6, kind: reloc_riprel_4byte

movl	$12, foo(%rip)
// CHECK: movl	$12, foo(%rip)
// CHECK: encoding: [0xc7,0x05,A,A,A,A,0x0c,0x00,0x00,0x00]
// CHECK:    fixup A - offset: 2, value: foo-8, kind: reloc_riprel_4byte

movq	$12, foo(%rip)
// CHECK:  movq	$12, foo(%rip)
// CHECK: encoding: [0x48,0xc7,0x05,A,A,A,A,0x0c,0x00,0x00,0x00]
// CHECK:    fixup A - offset: 3, value: foo-8, kind: reloc_riprel_4byte

// CHECK: addq	$-424, %rax
// CHECK: encoding: [0x48,0x05,0x58,0xfe,0xff,0xff]
addq $-424, %rax


// CHECK: movq	_foo@GOTPCREL(%rip), %rax
// CHECK:  encoding: [0x48,0x8b,0x05,A,A,A,A]
// CHECK:  fixup A - offset: 3, value: _foo@GOTPCREL-4, kind: reloc_riprel_4byte_movq_load
movq _foo@GOTPCREL(%rip), %rax

// CHECK: movq	_foo@GOTPCREL(%rip), %r14
// CHECK:  encoding: [0x4c,0x8b,0x35,A,A,A,A]
// CHECK:  fixup A - offset: 3, value: _foo@GOTPCREL-4, kind: reloc_riprel_4byte_movq_load
movq _foo@GOTPCREL(%rip), %r14


// CHECK: movq	(%r13,%rax,8), %r13
// CHECK:  encoding: [0x4d,0x8b,0x6c,0xc5,0x00]
movq 0x00(%r13,%rax,8),%r13

// CHECK: testq	%rax, %rbx
// CHECK:  encoding: [0x48,0x85,0xd8]
testq %rax, %rbx

// CHECK: cmpq	%rbx, %r14
// CHECK:   encoding: [0x49,0x39,0xde]
        cmpq %rbx, %r14

// rdar://7947167

movsq
// CHECK: movsq
// CHECK:   encoding: [0x48,0xa5]

movsl
// CHECK: movsl
// CHECK:   encoding: [0xa5]

stosq
// CHECK: stosq
// CHECK:   encoding: [0x48,0xab]
stosl
// CHECK: stosl
// CHECK:   encoding: [0xab]


// Not moffset forms of moves, they are x86-32 only! rdar://7947184
movb	0, %al    // CHECK: movb 0, %al # encoding: [0x8a,0x04,0x25,0x00,0x00,0x00,0x00]
movw	0, %ax    // CHECK: movw 0, %ax # encoding: [0x66,0x8b,0x04,0x25,0x00,0x00,0x00,0x00]
movl	0, %eax   // CHECK: movl 0, %eax # encoding: [0x8b,0x04,0x25,0x00,0x00,0x00,0x00]

// CHECK: pushfq	# encoding: [0x9c]
        pushf
// CHECK: pushfq	# encoding: [0x9c]
        pushfq
// CHECK: popfq	        # encoding: [0x9d]
        popf
// CHECK: popfq	        # encoding: [0x9d]
        popfq

// CHECK: movabsq $-281474976710654, %rax
// CHECK: encoding: [0x48,0xb8,0x02,0x00,0x00,0x00,0x00,0x00,0xff,0xff]
        movabsq $0xFFFF000000000002, %rax

// CHECK: movabsq $-281474976710654, %rax
// CHECK: encoding: [0x48,0xb8,0x02,0x00,0x00,0x00,0x00,0x00,0xff,0xff]
        movq $0xFFFF000000000002, %rax

// CHECK: movq $-65536, %rax
// CHECK: encoding: [0x48,0xc7,0xc0,0x00,0x00,0xff,0xff]
        movq $0xFFFFFFFFFFFF0000, %rax

// CHECK: movq $-256, %rax
// CHECK: encoding: [0x48,0xc7,0xc0,0x00,0xff,0xff,0xff]
        movq $0xFFFFFFFFFFFFFF00, %rax

// CHECK: movq $10, %rax
// CHECK: encoding: [0x48,0xc7,0xc0,0x0a,0x00,0x00,0x00]
        movq $10, %rax

// rdar://8014869
//
// CHECK: ret
// CHECK:  encoding: [0xc3]
        retq

// CHECK: sete %al
// CHECK: encoding: [0x0f,0x94,0xc0]
        setz %al

// CHECK: setne %al
// CHECK: encoding: [0x0f,0x95,0xc0]
        setnz %al

// CHECK: je 0
// CHECK: encoding: [0x74,A]
        jz 0

// CHECK: jne
// CHECK: encoding: [0x75,A]
        jnz 0

// rdar://8017515
btq $0x01,%rdx
// CHECK: btq	$1, %rdx
// CHECK:  encoding: [0x48,0x0f,0xba,0xe2,0x01]

//rdar://8017633
// CHECK: movzbl	%al, %esi
// CHECK:  encoding: [0x0f,0xb6,0xf0]
        movzx %al, %esi

// CHECK: movzbq	%al, %rsi
// CHECK:  encoding: [0x48,0x0f,0xb6,0xf0]
        movzx %al, %rsi

// CHECK: movzbq	(%rsp), %rsi
// CHECK:  encoding: [0x48,0x0f,0xb6,0x34,0x24]
        movzx 0(%rsp), %rsi


// rdar://7873482
// CHECK: [0x65,0x8b,0x04,0x25,0x7c,0x00,0x00,0x00]
        movl	%gs:124, %eax

// CHECK: jmpq *8(%rax)
// CHECK:   encoding: [0xff,0x60,0x08]
	jmp	*8(%rax)

// CHECK: btq $61, -216(%rbp)
// CHECK:   encoding: [0x48,0x0f,0xba,0xa5,0x28,0xff,0xff,0xff,0x3d]
	btq	$61, -216(%rbp)


// rdar://8061602
L1:
  jecxz L1
// CHECK: jecxz L1
// CHECK:   encoding: [0x67,0xe3,A]
  jrcxz L1
// CHECK: jrcxz L1
// CHECK:   encoding: [0xe3,A]

// PR8061
xchgl   368(%rax),%ecx
// CHECK: xchgl	%ecx, 368(%rax)
xchgl   %ecx, 368(%rax)
// CHECK: xchgl	%ecx, 368(%rax)

// rdar://8407548
xchg	0xdeadbeef(%rbx,%rcx,8),%bl
// CHECK: xchgb	%bl, 3735928559(%rbx,%rcx,8)



// PR7254
lock  incl 1(%rsp)
// CHECK: lock
// CHECK: incl 1(%rsp)

// rdar://8033482
rep movsl
// CHECK: rep
// CHECK: encoding: [0xf3]
// CHECK: movsl
// CHECK: encoding: [0xa5]


// rdar://8403974
iret
// CHECK: iretl
// CHECK: encoding: [0xcf]
iretw
// CHECK: iretw
// CHECK: encoding: [0x66,0xcf]
iretl
// CHECK: iretl
// CHECK: encoding: [0xcf]
iretq
// CHECK: iretq
// CHECK: encoding: [0x48,0xcf]

// rdar://8416805
// CHECK: retw	$31438
// CHECK:  encoding: [0x66,0xc2,0xce,0x7a]
        	retw	$0x7ace

// CHECK: lretw	$31438
// CHECK:  encoding: [0x66,0xca,0xce,0x7a]
        	lretw	$0x7ace

// rdar://8403907
sysret
// CHECK: sysretl
// CHECK: encoding: [0x0f,0x07]
sysretl
// CHECK: sysretl
// CHECK: encoding: [0x0f,0x07]
sysretq
// CHECK: sysretq
// CHECK: encoding: [0x48,0x0f,0x07]

// rdar://8407242
push %fs
// CHECK: pushq	%fs
// CHECK: encoding: [0x0f,0xa0]
push %gs
// CHECK: pushq	%gs
// CHECK: encoding: [0x0f,0xa8]

pushw %fs
// CHECK: pushw	%fs
// CHECK: encoding: [0x66,0x0f,0xa0]
pushw %gs
// CHECK: pushw	%gs
// CHECK: encoding: [0x66,0x0f,0xa8]


pop %fs
// CHECK: popq	%fs
// CHECK: encoding: [0x0f,0xa1]
pop %gs
// CHECK: popq	%gs
// CHECK: encoding: [0x0f,0xa9]

popw %fs
// CHECK: popw	%fs
// CHECK: encoding: [0x66,0x0f,0xa1]
popw %gs
// CHECK: popw	%gs
// CHECK: encoding: [0x66,0x0f,0xa9]

// rdar://8438816
fildq -8(%rsp)
fildll -8(%rsp)
// CHECK: fildll	-8(%rsp)
// CHECK: encoding: [0xdf,0x6c,0x24,0xf8]
// CHECK: fildll	-8(%rsp)
// CHECK: encoding: [0xdf,0x6c,0x24,0xf8]

// CHECK: callq a
        callq a

// CHECK: leaq	-40(%rbp), %r15
	leaq	-40(%rbp), %r15



// rdar://8013734 - Alias dr6=db6
mov %dr6, %rax
mov %db6, %rax
// CHECK: movq	%dr6, %rax
// CHECK: movq	%dr6, %rax


// INC/DEC encodings.
incb %al  // CHECK:	incb	%al # encoding: [0xfe,0xc0]
incw %ax  // CHECK:	incw	%ax # encoding: [0x66,0xff,0xc0]
incl %eax // CHECK:	incl	%eax # encoding: [0xff,0xc0]
decb %al  // CHECK:	decb	%al # encoding: [0xfe,0xc8]
decw %ax  // CHECK:	decw	%ax # encoding: [0x66,0xff,0xc8]
decl %eax // CHECK:	decl	%eax # encoding: [0xff,0xc8]

// rdar://8416805
// CHECK: lgdt	4(%rax)
// CHECK:  encoding: [0x0f,0x01,0x50,0x04]
        	lgdt	4(%rax)

// CHECK: lgdt	4(%rax)
// CHECK:  encoding: [0x0f,0x01,0x50,0x04]
        	lgdtq	4(%rax)

// CHECK: lidt	4(%rax)
// CHECK:  encoding: [0x0f,0x01,0x58,0x04]
        	lidt	4(%rax)

// CHECK: lidt	4(%rax)
// CHECK:  encoding: [0x0f,0x01,0x58,0x04]
        	lidtq	4(%rax)

// CHECK: sgdt	4(%rax)
// CHECK:  encoding: [0x0f,0x01,0x40,0x04]
        	sgdt	4(%rax)

// CHECK: sgdt	4(%rax)
// CHECK:  encoding: [0x0f,0x01,0x40,0x04]
        	sgdtq	4(%rax)

// CHECK: sidt	4(%rax)
// CHECK:  encoding: [0x0f,0x01,0x48,0x04]
        	sidt	4(%rax)

// CHECK: sidt	4(%rax)
// CHECK:  encoding: [0x0f,0x01,0x48,0x04]
        	sidtq	4(%rax)