Given the following C code and unoptimized assembly code, your task is to generate highly optimized x86-64 assembly code.
C Code:

```c
#include <stdio.h>
#include <stdlib.h>

//GCD
int gcd(int a, int b) {
  if (b == 0) return a;
  return gcd(b, a%b);
}

int main() {
  int n, x;
  scanf("%d%d", &n, &x);
  int cx, d, ans = 0;
  for (int i=0; i<n; i++) {
    scanf("%d", &cx);
    d = abs(cx - x);
    ans = gcd(d, ans);
  }
  printf("%d", ans);
  return 0;
}
```

Unoptimized Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.globl	gcd
	.type	gcd, @function
gcd:
.LFB6:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$16, %rsp
	movl	%edi, -4(%rbp)
	movl	%esi, -8(%rbp)
	cmpl	$0, -8(%rbp)
	jne	.L2
	movl	-4(%rbp), %eax
	jmp	.L3
.L2:
	movl	-4(%rbp), %eax
	cltd
	idivl	-8(%rbp)
	movl	-8(%rbp), %eax
	movl	%edx, %esi
	movl	%eax, %edi
	call	gcd
.L3:
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE6:
	.size	gcd, .-gcd
	.section	.rodata
.LC0:
	.string	"%d%d"
.LC1:
	.string	"%d"
	.text
	.globl	main
	.type	main, @function
main:
.LFB7:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$32, %rsp
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	leaq	-28(%rbp), %rdx
	leaq	-32(%rbp), %rax
	movq	%rax, %rsi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	movl	$0, -20(%rbp)
	movl	$0, -16(%rbp)
	jmp	.L5
.L6:
	leaq	-24(%rbp), %rax
	movq	%rax, %rsi
	leaq	.LC1(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	movl	-24(%rbp), %eax
	movl	-28(%rbp), %edx
	subl	%edx, %eax
	movl	%eax, %edx
	negl	%edx
	cmovns	%edx, %eax
	movl	%eax, -12(%rbp)
	movl	-20(%rbp), %edx
	movl	-12(%rbp), %eax
	movl	%edx, %esi
	movl	%eax, %edi
	call	gcd
	movl	%eax, -20(%rbp)
	addl	$1, -16(%rbp)
.L5:
	movl	-32(%rbp), %eax
	cmpl	%eax, -16(%rbp)
	jl	.L6
	movl	-20(%rbp), %eax
	movl	%eax, %esi
	leaq	.LC1(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
	movl	$0, %eax
	movq	-8(%rbp), %rdx
	subq	%fs:40, %rdx
	je	.L8
	call	__stack_chk_fail@PLT
.L8:
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE7:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:
```

Only output the optimized assembly code. Do not include any other text. Do not write any comments in the assembly code. Wrap the assembly code in ```assembly``` tags.
user
	.file	"temp.c"
	.text
	.p2align 4
	.globl	gcd
	.type	gcd, @function
gcd:
.LFB39:
	.cfi_startproc
	endbr64
	movl	%edi, %eax
	movl	%esi, %r8d
	testl	%esi, %esi
	jne	.L2
	jmp	.L10
	.p2align 4,,10
	.p2align 3
.L11:
	movl	%edx, %r8d
.L2:
	cltd
	idivl	%r8d
	movl	%r8d, %eax
	testl	%edx, %edx
	jne	.L11
	movl	%r8d, %eax
	ret
	.p2align 4,,10
	.p2align 3
.L10:
	movl	%edi, %r8d
	movl	%r8d, %eax
	ret
	.cfi_endproc
.LFE39:
	.size	gcd, .-gcd
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d%d"
.LC1:
	.string	"%d"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB40:
	.cfi_startproc
	endbr64
	pushq	%r13
	.cfi_def_cfa_offset 16
	.cfi_offset 13, -16
	leaq	.LC0(%rip), %rdi
	leaq	.LC1(%rip), %r13
	pushq	%r12
	.cfi_def_cfa_offset 24
	.cfi_offset 12, -24
	xorl	%r12d, %r12d
	pushq	%rbp
	.cfi_def_cfa_offset 32
	.cfi_offset 6, -32
	pushq	%rbx
	.cfi_def_cfa_offset 40
	.cfi_offset 3, -40
	subq	$40, %rsp
	.cfi_def_cfa_offset 80
	movq	%fs:40, %rax
	movq	%rax, 24(%rsp)
	xorl	%eax, %eax
	leaq	16(%rsp), %rdx
	leaq	12(%rsp), %rsi
	call	__isoc99_scanf@PLT
	movl	12(%rsp), %eax
	testl	%eax, %eax
	jle	.L14
	leaq	20(%rsp), %rbx
	leaq	.LC1(%rip), %r13
	xorl	%eax, %eax
	movl	$1, %ebp
	movq	%rbx, %rsi
	movq	%r13, %rdi
	call	__isoc99_scanf@PLT
	movl	20(%rsp), %eax
	subl	16(%rsp), %eax
	movl	%eax, %r12d
	negl	%r12d
	cmovs	%eax, %r12d
	cmpl	$1, 12(%rsp)
	jle	.L14
	.p2align 4,,10
	.p2align 3
.L16:
	xorl	%eax, %eax
	movq	%rbx, %rsi
	movq	%r13, %rdi
	call	__isoc99_scanf@PLT
	movl	20(%rsp), %edx
	subl	16(%rsp), %edx
	movl	%edx, %eax
	negl	%eax
	cmovs	%edx, %eax
	testl	%r12d, %r12d
	jne	.L15
	jmp	.L29
	.p2align 4,,10
	.p2align 3
.L30:
	movl	%edx, %r12d
.L15:
	cltd
	idivl	%r12d
	movl	%r12d, %eax
	testl	%edx, %edx
	jne	.L30
.L17:
	addl	$1, %ebp
	cmpl	%ebp, 12(%rsp)
	jg	.L16
.L14:
	xorl	%eax, %eax
	movl	%r12d, %edx
	movq	%r13, %rsi
	movl	$1, %edi
	call	__printf_chk@PLT
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L31
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 40
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 32
	popq	%rbp
	.cfi_def_cfa_offset 24
	popq	%r12
	.cfi_def_cfa_offset 16
	popq	%r13
	.cfi_def_cfa_offset 8
	ret
.L29:
	.cfi_restore_state
	movl	%eax, %r12d
	jmp	.L17
.L31:
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE40:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:

rule
	.file	"temp.c"
	.text
	.p2align 4
	.globl	gcd
	.type	gcd, @function
gcd:
.LFB39:
	.cfi_startproc
	endbr64
	movl	%edi, %eax
	movl	%esi, %r8d
	testl	%esi, %esi
	jne	.L2
	jmp	.L10
	.p2align 4,,10
	.p2align 3
.L11:
	movl	%edx, %r8d
.L2:
	cltd
	idivl	%r8d
	movl	%r8d, %eax
	testl	%edx, %edx
	jne	.L11
	movl	%r8d, %eax
	ret
	.p2align 4,,10
	.p2align 3
.L10:
	movl	%edi, %r8d
	movl	%r8d, %eax
	ret
	.cfi_endproc
.LFE39:
	.size	gcd, .-gcd
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d%d"
.LC1:
	.string	"%d"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB40:
	.cfi_startproc
	endbr64
	pushq	%r13
	.cfi_def_cfa_offset 16
	.cfi_offset 13, -16
	leaq	.LC0(%rip), %rdi
	leaq	.LC1(%rip), %r13
	pushq	%r12
	.cfi_def_cfa_offset 24
	.cfi_offset 12, -24
	xorl	%r12d, %r12d
	pushq	%rbp
	.cfi_def_cfa_offset 32
	.cfi_offset 6, -32
	pushq	%rbx
	.cfi_def_cfa_offset 40
	.cfi_offset 3, -40
	subq	$40, %rsp
	.cfi_def_cfa_offset 80
	movq	%fs:40, %rax
	movq	%rax, 24(%rsp)
	xorl	%eax, %eax
	leaq	16(%rsp), %rdx
	leaq	12(%rsp), %rsi
	call	__isoc99_scanf@PLT
	movl	12(%rsp), %eax
	testl	%eax, %eax
	jle	.L14
	leaq	20(%rsp), %rbx
	leaq	.LC1(%rip), %r13
	xorl	%eax, %eax
	movl	$1, %ebp
	movq	%rbx, %rsi
	movq	%r13, %rdi
	call	__isoc99_scanf@PLT
	movl	20(%rsp), %eax
	subl	16(%rsp), %eax
	movl	%eax, %r12d
	negl	%r12d
	cmovs	%eax, %r12d
	cmpl	$1, 12(%rsp)
	jle	.L14
	.p2align 4,,10
	.p2align 3
.L16:
	xorl	%eax, %eax
	movq	%rbx, %rsi
	movq	%r13, %rdi
	call	__isoc99_scanf@PLT
	movl	20(%rsp), %edx
	subl	16(%rsp), %edx
	movl	%edx, %eax
	negl	%eax
	cmovs	%edx, %eax
	testl	%r12d, %r12d
	jne	.L15
	jmp	.L29
	.p2align 4,,10
	.p2align 3
.L30:
	movl	%edx, %r12d
.L15:
	cltd
	idivl	%r12d
	movl	%r12d, %eax
	testl	%edx, %edx
	jne	.L30
.L17:
	addl	$1, %ebp
	cmpl	%ebp, 12(%rsp)
	jg	.L16
.L14:
	xorl	%eax, %eax
	movl	%r12d, %edx
	movq	%r13, %rsi
	movl	$1, %edi
	call	__printf_chk@PLT
	movq	24(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L31
	addq	$40, %rsp
	.cfi_remember_state
	.cfi_def_cfa_offset 40
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 32
	popq	%rbp
	.cfi_def_cfa_offset 24
	popq	%r12
	.cfi_def_cfa_offset 16
	popq	%r13
	.cfi_def_cfa_offset 8
	ret
.L29:
	.cfi_restore_state
	movl	%eax, %r12d
	jmp	.L17
.L31:
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE40:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:

#include <stdio.h>
#include <stdlib.h>

//GCD
int gcd(int a, int b) {
  if (b == 0) return a;
  return gcd(b, a%b);
}

int main() {
  int n, x;
  scanf("%d%d", &n, &x);
  int cx, d, ans = 0;
  for (int i=0; i<n; i++) {
    scanf("%d", &cx);
    d = abs(cx - x);
    ans = gcd(d, ans);
  }
  printf("%d", ans);
  return 0;
}

3 81
33 79 57
 1 1
1010000000
 3 81
33 70 57
 1 1
1010000100
 3 81
33 42 57
 1 0
1010000100
 1 0
1010010100
 1 1
1010010100
 1 1
1000000100
 1 0
1010000000

2 1009999999 1 1010000099 3 1010000100 1010010100 1010010099 1000000099 1010000000
Given the following C code and unoptimized assembly code, your task is to generate highly optimized x86-64 assembly code.
C Code:

```c
#include <stdio.h>
#include <stdlib.h>

//GCD
int gcd(int a, int b) {
  if (b == 0) return a;
  return gcd(b, a%b);
}

int main() {
  int n, x;
  scanf("%d%d", &n, &x);
  int cx, d, ans = 0;
  for (int i=0; i<n; i++) {
    scanf("%d", &cx);
    d = abs(cx - x);
    ans = gcd(d, ans);
  }
  printf("%d", ans);
  return 0;
}
```

Unoptimized Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.globl	gcd
	.type	gcd, @function
gcd:
.LFB6:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$16, %rsp
	movl	%edi, -4(%rbp)
	movl	%esi, -8(%rbp)
	cmpl	$0, -8(%rbp)
	jne	.L2
	movl	-4(%rbp), %eax
	jmp	.L3
.L2:
	movl	-4(%rbp), %eax
	cltd
	idivl	-8(%rbp)
	movl	-8(%rbp), %eax
	movl	%edx, %esi
	movl	%eax, %edi
	call	gcd
.L3:
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE6:
	.size	gcd, .-gcd
	.section	.rodata
.LC0:
	.string	"%d%d"
.LC1:
	.string	"%d"
	.text
	.globl	main
	.type	main, @function
main:
.LFB7:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$32, %rsp
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	leaq	-28(%rbp), %rdx
	leaq	-32(%rbp), %rax
	movq	%rax, %rsi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	movl	$0, -20(%rbp)
	movl	$0, -16(%rbp)
	jmp	.L5
.L6:
	leaq	-24(%rbp), %rax
	movq	%rax, %rsi
	leaq	.LC1(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	movl	-24(%rbp), %eax
	movl	-28(%rbp), %edx
	subl	%edx, %eax
	movl	%eax, %edx
	negl	%edx
	cmovns	%edx, %eax
	movl	%eax, -12(%rbp)
	movl	-20(%rbp), %edx
	movl	-12(%rbp), %eax
	movl	%edx, %esi
	movl	%eax, %edi
	call	gcd
	movl	%eax, -20(%rbp)
	addl	$1, -16(%rbp)
.L5:
	movl	-32(%rbp), %eax
	cmpl	%eax, -16(%rbp)
	jl	.L6
	movl	-20(%rbp), %eax
	movl	%eax, %esi
	leaq	.LC1(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
	movl	$0, %eax
	movq	-8(%rbp), %rdx
	subq	%fs:40, %rdx
	je	.L8
	call	__stack_chk_fail@PLT
.L8:
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE7:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:
```

Only output the optimized assembly code. Do not include any other text. Do not write any comments in the assembly code. Wrap the assembly code in ```assembly``` tags.
val
	.file	"temp.c"
	.text
	.globl	gcd
	.type	gcd, @function
gcd:
.LFB6:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$16, %rsp
	movl	%edi, -4(%rbp)
	movl	%esi, -8(%rbp)
	cmpl	$0, -8(%rbp)
	jne	.L2
	movl	-4(%rbp), %eax
	jmp	.L3
.L2:
	movl	-4(%rbp), %eax
	cltd
	idivl	-8(%rbp)
	movl	-8(%rbp), %eax
	movl	%edx, %esi
	movl	%eax, %edi
	call	gcd
.L3:
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE6:
	.size	gcd, .-gcd
	.section	.rodata
.LC0:
	.string	"%d%d"
.LC1:
	.string	"%d"
	.text
	.globl	main
	.type	main, @function
main:
.LFB7:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$32, %rsp
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	leaq	-28(%rbp), %rdx
	leaq	-32(%rbp), %rax
	movq	%rax, %rsi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	movl	$0, -20(%rbp)
	movl	$0, -16(%rbp)
	jmp	.L5
.L6:
	leaq	-24(%rbp), %rax
	movq	%rax, %rsi
	leaq	.LC1(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	movl	-24(%rbp), %eax
	movl	-28(%rbp), %edx
	subl	%edx, %eax
	movl	%eax, %edx
	negl	%edx
	cmovns	%edx, %eax
	movl	%eax, -12(%rbp)
	movl	-20(%rbp), %edx
	movl	-12(%rbp), %eax
	movl	%edx, %esi
	movl	%eax, %edi
	call	gcd
	movl	%eax, -20(%rbp)
	addl	$1, -16(%rbp)
.L5:
	movl	-32(%rbp), %eax
	cmpl	%eax, -16(%rbp)
	jl	.L6
	movl	-20(%rbp), %eax
	movl	%eax, %esi
	leaq	.LC1(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
	movl	$0, %eax
	movq	-8(%rbp), %rdx
	subq	%fs:40, %rdx
	je	.L8
	call	__stack_chk_fail@PLT
.L8:
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE7:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:
