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>

int gcd(int a,int b)
{
    if(b==0) return a;
    else return gcd(b,a%b);

}

int main(void)
{
int a,b;

while(scanf("%d%d",&a,&b)!=EOF){
printf("%d\n",gcd(a,b));
}

    return 0;
}```

Unoptimized Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.globl	gcd
	.type	gcd, @function
gcd:
.LFB0:
	.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
.LFE0:
	.size	gcd, .-gcd
	.section	.rodata
.LC0:
	.string	"%d\n"
.LC1:
	.string	"%d%d"
	.text
	.globl	main
	.type	main, @function
main:
.LFB1:
	.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
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	jmp	.L5
.L6:
	movl	-12(%rbp), %edx
	movl	-16(%rbp), %eax
	movl	%edx, %esi
	movl	%eax, %edi
	call	gcd
	movl	%eax, %esi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
.L5:
	leaq	-12(%rbp), %rdx
	leaq	-16(%rbp), %rax
	movq	%rax, %rsi
	leaq	.LC1(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	cmpl	$-1, %eax
	jne	.L6
	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
.LFE1:
	.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:
.LFB23:
	.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
.LFE23:
	.size	gcd, .-gcd
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d\n"
.LC1:
	.string	"%d%d"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB24:
	.cfi_startproc
	endbr64
	pushq	%r13
	.cfi_def_cfa_offset 16
	.cfi_offset 13, -16
	leaq	.LC0(%rip), %r13
	pushq	%r12
	.cfi_def_cfa_offset 24
	.cfi_offset 12, -24
	pushq	%rbp
	.cfi_def_cfa_offset 32
	.cfi_offset 6, -32
	pushq	%rbx
	.cfi_def_cfa_offset 40
	.cfi_offset 3, -40
	leaq	.LC1(%rip), %rbx
	subq	$24, %rsp
	.cfi_def_cfa_offset 64
	movq	%fs:40, %rax
	movq	%rax, 8(%rsp)
	xorl	%eax, %eax
	leaq	4(%rsp), %r12
	movq	%rsp, %rbp
	.p2align 4,,10
	.p2align 3
.L13:
	xorl	%eax, %eax
	movq	%r12, %rdx
	movq	%rbp, %rsi
	movq	%rbx, %rdi
	call	__isoc99_scanf@PLT
	cmpl	$-1, %eax
	je	.L23
	movl	4(%rsp), %r8d
	movl	(%rsp), %eax
	testl	%r8d, %r8d
	jne	.L14
	jmp	.L24
	.p2align 4,,10
	.p2align 3
.L25:
	movl	%edx, %r8d
.L14:
	cltd
	idivl	%r8d
	movl	%r8d, %eax
	testl	%edx, %edx
	jne	.L25
.L15:
	movl	%r8d, %edx
	movq	%r13, %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L13
	.p2align 4,,10
	.p2align 3
.L23:
	movq	8(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L26
	addq	$24, %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
	.p2align 4,,10
	.p2align 3
.L24:
	.cfi_restore_state
	movl	%eax, %r8d
	jmp	.L15
.L26:
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE24:
	.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:
.LFB23:
	.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
.LFE23:
	.size	gcd, .-gcd
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d\n"
.LC1:
	.string	"%d%d"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB24:
	.cfi_startproc
	endbr64
	pushq	%r13
	.cfi_def_cfa_offset 16
	.cfi_offset 13, -16
	leaq	.LC0(%rip), %r13
	pushq	%r12
	.cfi_def_cfa_offset 24
	.cfi_offset 12, -24
	pushq	%rbp
	.cfi_def_cfa_offset 32
	.cfi_offset 6, -32
	pushq	%rbx
	.cfi_def_cfa_offset 40
	.cfi_offset 3, -40
	leaq	.LC1(%rip), %rbx
	subq	$24, %rsp
	.cfi_def_cfa_offset 64
	movq	%fs:40, %rax
	movq	%rax, 8(%rsp)
	xorl	%eax, %eax
	leaq	4(%rsp), %r12
	movq	%rsp, %rbp
	.p2align 4,,10
	.p2align 3
.L13:
	xorl	%eax, %eax
	movq	%r12, %rdx
	movq	%rbp, %rsi
	movq	%rbx, %rdi
	call	__isoc99_scanf@PLT
	cmpl	$-1, %eax
	je	.L23
	movl	4(%rsp), %r8d
	movl	(%rsp), %eax
	testl	%r8d, %r8d
	jne	.L14
	jmp	.L24
	.p2align 4,,10
	.p2align 3
.L25:
	movl	%edx, %r8d
.L14:
	cltd
	idivl	%r8d
	movl	%r8d, %eax
	testl	%edx, %edx
	jne	.L25
.L15:
	movl	%r8d, %edx
	movq	%r13, %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	jmp	.L13
	.p2align 4,,10
	.p2align 3
.L23:
	movq	8(%rsp), %rax
	subq	%fs:40, %rax
	jne	.L26
	addq	$24, %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
	.p2align 4,,10
	.p2align 3
.L24:
	.cfi_restore_state
	movl	%eax, %r8d
	jmp	.L15
.L26:
	call	__stack_chk_fail@PLT
	.cfi_endproc
.LFE24:
	.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>

int gcd(int a,int b)
{
    if(b==0) return a;
    else return gcd(b,a%b);

}

int main(void)
{
int a,b;

while(scanf("%d%d",&a,&b)!=EOF){
printf("%d\n",gcd(a,b));
}

    return 0;
}
57 38
19 84
 57 38
6 84
 101 38
6 84
 101 47
6 88
 100 47
11 88
 57 18
19 84
 101 47
6 37
 101 47
6 21
 100 38
10 84
 100 88
6 169

19
1
 19
6
 1
6
 1
2
 1
11
 3
1
 1
1
 1
3
 2
2
 4
1

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>

int gcd(int a,int b)
{
    if(b==0) return a;
    else return gcd(b,a%b);

}

int main(void)
{
int a,b;

while(scanf("%d%d",&a,&b)!=EOF){
printf("%d\n",gcd(a,b));
}

    return 0;
}```

Unoptimized Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.globl	gcd
	.type	gcd, @function
gcd:
.LFB0:
	.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
.LFE0:
	.size	gcd, .-gcd
	.section	.rodata
.LC0:
	.string	"%d\n"
.LC1:
	.string	"%d%d"
	.text
	.globl	main
	.type	main, @function
main:
.LFB1:
	.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
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	jmp	.L5
.L6:
	movl	-12(%rbp), %edx
	movl	-16(%rbp), %eax
	movl	%edx, %esi
	movl	%eax, %edi
	call	gcd
	movl	%eax, %esi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
.L5:
	leaq	-12(%rbp), %rdx
	leaq	-16(%rbp), %rax
	movq	%rax, %rsi
	leaq	.LC1(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	cmpl	$-1, %eax
	jne	.L6
	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
.LFE1:
	.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.
train
	.file	"temp.c"
	.text
	.globl	gcd
	.type	gcd, @function
gcd:
.LFB0:
	.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
.LFE0:
	.size	gcd, .-gcd
	.section	.rodata
.LC0:
	.string	"%d\n"
.LC1:
	.string	"%d%d"
	.text
	.globl	main
	.type	main, @function
main:
.LFB1:
	.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
	movq	%fs:40, %rax
	movq	%rax, -8(%rbp)
	xorl	%eax, %eax
	jmp	.L5
.L6:
	movl	-12(%rbp), %edx
	movl	-16(%rbp), %eax
	movl	%edx, %esi
	movl	%eax, %edi
	call	gcd
	movl	%eax, %esi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
.L5:
	leaq	-12(%rbp), %rdx
	leaq	-16(%rbp), %rax
	movq	%rax, %rsi
	leaq	.LC1(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	cmpl	$-1, %eax
	jne	.L6
	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
.LFE1:
	.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:
