user: 这段汇编代码用C语言表示是什么样的?

```asm
<sum>:
  endbr64
  push   %r15
  push   %r14
  mov    %rdi,%r14
  push   %r13
  movslq %edx,%r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  cmp    %r13d,%esi
  je     L41
  lea    (%rsi,%r13,1),%eax
  mov    %eax,%ebx
  shr    $0x1f,%ebx
  add    %eax,%ebx
  sar    %ebx
  cmp    %ebx,%esi
  je     L309
  lea    (%rsi,%rbx,1),%eax
  mov    %eax,%ebp
  shr    $0x1f,%ebp
  add    %eax,%ebp
  sar    %ebp
  cmp    %ebp,%esi
  je     L128
  lea    (%rsi,%rbp,1),%eax
  mov    %eax,%r12d
  shr    $0x1f,%r12d
  add    %eax,%r12d
  sar    %r12d
  cmp    %r12d,%esi
  je     L386
  lea    (%rsi,%r12,1),%edx
  mov    %edx,%eax
  shr    $0x1f,%eax
  add    %edx,%eax
  sar    %eax
  cmp    %eax,%esi
  je     L392
  lea    (%rsi,%rax,1),%edx
  mov    %eax,0x10(%rsp)
  mov    %edx,%r15d
  shr    $0x1f,%r15d
  add    %edx,%r15d
  sar    %r15d
  mov    %r15d,%edx
  call   <sum>
  mov    0x10(%rsp),%edx
  lea    0x1(%r15),%esi
  mov    %r14,%rdi
  movsd  %xmm0,0x8(%rsp)
  call   <sum>
  movsd  0x8(%rsp),%xmm2
  mov    0x10(%rsp),%eax
  addsd  %xmm0,%xmm2
L337:
  lea    0x1(%rax),%esi
  cmp    %esi,%r12d
  je     L277
  lea    (%r12,%rsi,1),%eax
  mov    %r14,%rdi
  movsd  %xmm2,0x10(%rsp)
  mov    %eax,%r15d
  shr    $0x1f,%r15d
  add    %eax,%r15d
  sar    %r15d
  mov    %r15d,%edx
  call   <sum>
  lea    0x1(%r15),%esi
  mov    %r12d,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x8(%rsp)
  call   <sum>
  movsd  0x8(%rsp),%xmm1
  movsd  0x10(%rsp),%xmm2
  addsd  %xmm0,%xmm1
L491:
  addsd  %xmm2,%xmm1
L49:
  lea    0x1(%r12),%esi
  cmp    %esi,%ebp
  je     L281
  lea    0x0(%rbp,%rsi,1),%eax
  mov    %eax,%r12d
  shr    $0x1f,%r12d
  add    %eax,%r12d
  sar    %r12d
  cmp    %r12d,%esi
  je     L54
  lea    (%rsi,%r12,1),%eax
  mov    %r14,%rdi
  movsd  %xmm1,0x10(%rsp)
  mov    %eax,%r15d
  shr    $0x1f,%r15d
  add    %eax,%r15d
  sar    %r15d
  mov    %r15d,%edx
  call   <sum>
  lea    0x1(%r15),%esi
  mov    %r12d,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x8(%rsp)
  call   <sum>
  movsd  0x8(%rsp),%xmm2
  movsd  0x10(%rsp),%xmm1
  addsd  %xmm0,%xmm2
L585:
  lea    0x1(%r12),%esi
  cmp    %esi,%ebp
  je     L122
  lea    0x0(%rbp,%rsi,1),%eax
  mov    %r14,%rdi
  movsd  %xmm2,0x18(%rsp)
  mov    %eax,%r12d
  movsd  %xmm1,0x10(%rsp)
  shr    $0x1f,%r12d
  add    %eax,%r12d
  sar    %r12d
  mov    %r12d,%edx
  call   <sum>
  lea    0x1(%r12),%esi
  mov    %ebp,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x8(%rsp)
  call   <sum>
  addsd  0x8(%rsp),%xmm0
  movsd  0x18(%rsp),%xmm2
  movsd  0x10(%rsp),%xmm1
L146:
  addsd  %xmm2,%xmm0
L391:
  addsd  %xmm1,%xmm0
  lea    0x1(%rbp),%r8d
  movsd  %xmm0,0x8(%rsp)
  cmp    %r8d,%ebx
  je     L355
L451:
  lea    (%rbx,%r8,1),%eax
  mov    %eax,%esi
  shr    $0x1f,%esi
  add    %eax,%esi
  sar    %esi
  mov    %esi,%r15d
  cmp    %esi,%r8d
  je     L343
  lea    (%r8,%rsi,1),%eax
  mov    %eax,%r12d
  shr    $0x1f,%r12d
  add    %eax,%r12d
  sar    %r12d
  cmp    %r12d,%r8d
  je     L435
  lea    (%r8,%r12,1),%eax
  mov    %r14,%rdi
  mov    %eax,%esi
  shr    $0x1f,%esi
  lea    (%rsi,%rax,1),%ebp
  mov    %r8d,%esi
  sar    %ebp
  mov    %ebp,%edx
  call   <sum>
  lea    0x1(%rbp),%esi
  mov    %r12d,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x10(%rsp)
  call   <sum>
  movsd  0x10(%rsp),%xmm2
  addsd  %xmm0,%xmm2
L403:
  lea    0x1(%r12),%esi
  cmp    %esi,%r15d
  je     L9
  lea    (%r15,%rsi,1),%eax
  mov    %r14,%rdi
  movsd  %xmm2,0x18(%rsp)
  mov    %eax,%ebp
  shr    $0x1f,%ebp
  add    %eax,%ebp
  sar    %ebp
  mov    %ebp,%edx
  call   <sum>
  lea    0x1(%rbp),%esi
  mov    %r15d,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x10(%rsp)
  call   <sum>
  movsd  0x10(%rsp),%xmm1
  movsd  0x18(%rsp),%xmm2
  addsd  %xmm0,%xmm1
L516:
  addsd  %xmm2,%xmm1
L44:
  lea    0x1(%r15),%esi
  cmp    %esi,%ebx
  je     L494
  lea    (%rbx,%rsi,1),%eax
  mov    %eax,%ebp
  shr    $0x1f,%ebp
  add    %eax,%ebp
  sar    %ebp
  cmp    %ebp,%esi
  je     L222
  lea    (%rsi,%rbp,1),%eax
  mov    %r14,%rdi
  movsd  %xmm1,0x18(%rsp)
  mov    %eax,%r12d
  shr    $0x1f,%r12d
  add    %eax,%r12d
  sar    %r12d
  mov    %r12d,%edx
  call   <sum>
  lea    0x1(%r12),%esi
  mov    %ebp,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x10(%rsp)
  call   <sum>
  movsd  0x10(%rsp),%xmm2
  movsd  0x18(%rsp),%xmm1
  addsd  %xmm0,%xmm2
L93:
  lea    0x1(%rbp),%esi
  cmp    %esi,%ebx
  je     L107
  lea    (%rbx,%rsi,1),%eax
  mov    %r14,%rdi
  movsd  %xmm2,0x20(%rsp)
  mov    %eax,%ebp
  movsd  %xmm1,0x18(%rsp)
  shr    $0x1f,%ebp
  add    %eax,%ebp
  sar    %ebp
  mov    %ebp,%edx
  call   <sum>
  lea    0x1(%rbp),%esi
  mov    %ebx,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x10(%rsp)
  call   <sum>
  addsd  0x10(%rsp),%xmm0
  movsd  0x20(%rsp),%xmm2
  movsd  0x18(%rsp),%xmm1
L375:
  addsd  %xmm2,%xmm0
L59:
  addsd  %xmm1,%xmm0
L269:
  addsd  0x8(%rsp),%xmm0
  lea    0x1(%rbx),%esi
  movsd  %xmm0,0x8(%rsp)
  cmp    %r13d,%esi
  jne    L584
L271:
  movsd  (%r14,%r13,8),%xmm0
L244:
  addsd  0x8(%rsp),%xmm0
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
L309:
  movslq %ebx,%rax
  lea    0x1(%rbx),%esi
  movsd  (%rdi,%rax,8),%xmm6
  movsd  %xmm6,0x8(%rsp)
  cmp    %r13d,%esi
  je     L271
L584:
  lea    (%rsi,%r13,1),%eax
  mov    %eax,%ebp
  shr    $0x1f,%ebp
  add    %eax,%ebp
  sar    %ebp
  cmp    %ebp,%esi
  je     L160
  lea    (%rsi,%rbp,1),%eax
  mov    %eax,%r12d
  shr    $0x1f,%r12d
  add    %eax,%r12d
  sar    %r12d
  cmp    %r12d,%esi
  je     L478
  lea    (%rsi,%r12,1),%eax
  mov    %eax,%ebx
  shr    $0x1f,%ebx
  add    %eax,%ebx
  sar    %ebx
  cmp    %ebx,%esi
  je     L568
  lea    (%rsi,%rbx,1),%eax
  mov    %r14,%rdi
  mov    %eax,%r15d
  shr    $0x1f,%r15d
  add    %eax,%r15d
  sar    %r15d
  mov    %r15d,%edx
  call   <sum>
  lea    0x1(%r15),%esi
  mov    %ebx,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x10(%rsp)
  call   <sum>
  movsd  0x10(%rsp),%xmm2
  addsd  %xmm0,%xmm2
L321:
  lea    0x1(%rbx),%esi
  cmp    %esi,%r12d
  je     L109
  lea    (%r12,%rsi,1),%eax
  mov    %r14,%rdi
  movsd  %xmm2,0x18(%rsp)
  mov    %eax,%ebx
  shr    $0x1f,%ebx
  add    %eax,%ebx
  sar    %ebx
  mov    %ebx,%edx
  call   <sum>
  lea    0x1(%rbx),%esi
  mov    %r12d,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x10(%rsp)
  call   <sum>
  movsd  0x10(%rsp),%xmm1
  movsd  0x18(%rsp),%xmm2
  addsd  %xmm0,%xmm1
L97:
  addsd  %xmm2,%xmm1
L603:
  lea    0x1(%r12),%esi
  cmp    %esi,%ebp
  je     L164
  lea    0x0(%rbp,%rsi,1),%eax
  mov    %eax,%ebx
  shr    $0x1f,%ebx
  add    %eax,%ebx
  sar    %ebx
  cmp    %ebx,%esi
  je     L373
  lea    (%rsi,%rbx,1),%eax
  mov    %r14,%rdi
  movsd  %xmm1,0x18(%rsp)
  mov    %eax,%r12d
  shr    $0x1f,%r12d
  add    %eax,%r12d
  sar    %r12d
  mov    %r12d,%edx
  call   <sum>
  lea    0x1(%r12),%esi
  mov    %ebx,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x10(%rsp)
  call   <sum>
  movsd  0x10(%rsp),%xmm2
  movsd  0x18(%rsp),%xmm1
  addsd  %xmm0,%xmm2
L302:
  lea    0x1(%rbx),%esi
  cmp    %esi,%ebp
  je     L161
  lea    0x0(%rbp,%rsi,1),%eax
  mov    %r14,%rdi
  movsd  %xmm2,0x20(%rsp)
  mov    %eax,%ebx
  movsd  %xmm1,0x18(%rsp)
  shr    $0x1f,%ebx
  add    %eax,%ebx
  sar    %ebx
  mov    %ebx,%edx
  call   <sum>
  lea    0x1(%rbx),%esi
  mov    %ebp,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x10(%rsp)
  call   <sum>
  addsd  0x10(%rsp),%xmm0
  movsd  0x20(%rsp),%xmm2
  movsd  0x18(%rsp),%xmm1
L481:
  addsd  %xmm2,%xmm0
L490:
  addsd  %xmm1,%xmm0
  add    $0x1,%ebp
  movsd  %xmm0,0x10(%rsp)
  cmp    %ebp,%r13d
  je     L448
L94:
  lea    0x0(%r13,%rbp,1),%eax
  mov    %eax,%esi
  shr    $0x1f,%esi
  add    %eax,%esi
  sar    %esi
  mov    %esi,%r12d
  cmp    %esi,%ebp
  je     L495
  lea    0x0(%rbp,%rsi,1),%eax
  mov    %eax,%ebx
  shr    $0x1f,%ebx
  add    %eax,%ebx
  sar    %ebx
  cmp    %ebx,%ebp
  je     L439
  lea    0x0(%rbp,%rbx,1),%eax
  mov    %ebp,%esi
  mov    %r14,%rdi
  mov    %eax,%r15d
  shr    $0x1f,%r15d
  add    %eax,%r15d
  sar    %r15d
  mov    %r15d,%edx
  call   <sum>
  lea    0x1(%r15),%esi
  mov    %ebx,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x18(%rsp)
  call   <sum>
  movsd  0x18(%rsp),%xmm2
  addsd  %xmm0,%xmm2
L208:
  lea    0x1(%rbx),%esi
  cmp    %esi,%r12d
  je     L92
  lea    (%r12,%rsi,1),%eax
  mov    %r14,%rdi
  movsd  %xmm2,0x20(%rsp)
  mov    %eax,%ebx
  shr    $0x1f,%ebx
  add    %eax,%ebx
  sar    %ebx
  mov    %ebx,%edx
  call   <sum>
  lea    0x1(%rbx),%esi
  mov    %r12d,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x18(%rsp)
  call   <sum>
  movsd  0x18(%rsp),%xmm1
  movsd  0x20(%rsp),%xmm2
  addsd  %xmm0,%xmm1
L147:
  addsd  %xmm2,%xmm1
L548:
  lea    0x1(%r12),%esi
  cmp    %esi,%r13d
  je     L394
  lea    0x0(%r13,%rsi,1),%eax
  mov    %eax,%ebx
  shr    $0x1f,%ebx
  add    %eax,%ebx
  sar    %ebx
  cmp    %ebx,%esi
  je     L170
  lea    (%rsi,%rbx,1),%eax
  mov    %r14,%rdi
  movsd  %xmm1,0x20(%rsp)
  mov    %eax,%ebp
  shr    $0x1f,%ebp
  add    %eax,%ebp
  sar    %ebp
  mov    %ebp,%edx
  call   <sum>
  lea    0x1(%rbp),%esi
  mov    %ebx,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x18(%rsp)
  call   <sum>
  movsd  0x18(%rsp),%xmm2
  movsd  0x20(%rsp),%xmm1
  addsd  %xmm0,%xmm2
L461:
  lea    0x1(%rbx),%esi
  cmp    %esi,%r13d
  je     L127
  lea    0x0(%r13,%rsi,1),%eax
  mov    %r14,%rdi
  movsd  %xmm2,0x28(%rsp)
  mov    %eax,%ebx
  movsd  %xmm1,0x20(%rsp)
  shr    $0x1f,%ebx
  add    %eax,%ebx
  sar    %ebx
  mov    %ebx,%edx
  call   <sum>
  lea    0x1(%rbx),%esi
  mov    %r13d,%edx
  mov    %r14,%rdi
  movsd  %xmm0,0x18(%rsp)
  call   <sum>
  addsd  0x18(%rsp),%xmm0
  movsd  0x28(%rsp),%xmm2
  movsd  0x20(%rsp),%xmm1
L7:
  addsd  %xmm2,%xmm0
L40:
  addsd  %xmm1,%xmm0
L517:
  addsd  0x10(%rsp),%xmm0
  jmp    L244
  nopw   0x0(%rax,%rax,1)
L41:
  movslq %esi,%rsi
  movsd  (%rdi,%rsi,8),%xmm0
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
L478:
  movslq %r12d,%rax
  movsd  (%r14,%rax,8),%xmm1
  jmp    L603
  xchg   %ax,%ax
L386:
  movslq %r12d,%rax
  movsd  (%rdi,%rax,8),%xmm1
  jmp    L49
  nopl   (%rax)
L160:
  movslq %ebp,%rax
  add    $0x1,%ebp
  movsd  (%r14,%rax,8),%xmm7
  movsd  %xmm7,0x10(%rsp)
  cmp    %ebp,%r13d
  jne    L94
L448:
  movsd  (%r14,%r13,8),%xmm0
  jmp    L517
  nopl   0x0(%rax,%rax,1)
L128:
  movslq %ebp,%rax
  lea    0x1(%rbp),%r8d
  movsd  (%rdi,%rax,8),%xmm7
  movsd  %xmm7,0x8(%rsp)
  cmp    %r8d,%ebx
  jne    L451
L355:
  movslq %ebx,%rax
  movsd  (%r14,%rax,8),%xmm0
  jmp    L269
  nopl   0x0(%rax)
L495:
  movslq %esi,%rax
  movsd  (%r14,%rax,8),%xmm1
  jmp    L548
  cs nopw 0x0(%rax,%rax,1)
L164:
  movslq %ebp,%rax
  movsd  (%r14,%rax,8),%xmm0
  jmp    L490
  xchg   %ax,%ax
L343:
  movslq %esi,%rax
  movsd  (%r14,%rax,8),%xmm1
  jmp    L44
  xchg   %ax,%ax
L281:
  movslq %ebp,%rax
  movsd  (%r14,%rax,8),%xmm0
  jmp    L391
  xchg   %ax,%ax
L394:
  movsd  (%r14,%r13,8),%xmm0
  jmp    L40
  nopl   0x0(%rax,%rax,1)
L494:
  movslq %ebx,%rax
  movsd  (%r14,%rax,8),%xmm0
  jmp    L59
  xchg   %ax,%ax
L92:
  movslq %r12d,%rax
  movsd  (%r14,%rax,8),%xmm1
  jmp    L147
  xchg   %ax,%ax
L9:
  movslq %r15d,%rax
  movsd  (%r14,%rax,8),%xmm1
  jmp    L516
  xchg   %ax,%ax
L107:
  movslq %ebx,%rax
  movsd  (%r14,%rax,8),%xmm0
  jmp    L375
  xchg   %ax,%ax
L222:
  movslq %ebp,%rax
  movsd  (%r14,%rax,8),%xmm2
  jmp    L93
  xchg   %ax,%ax
L161:
  movslq %ebp,%rax
  movsd  (%r14,%rax,8),%xmm0
  jmp    L481
  xchg   %ax,%ax
L122:
  movslq %ebp,%rax
  movsd  (%r14,%rax,8),%xmm0
  jmp    L146
  xchg   %ax,%ax
L127:
  movsd  (%r14,%r13,8),%xmm0
  jmp    L7
  nopl   0x0(%rax,%rax,1)
L170:
  movslq %ebx,%rax
  movsd  (%r14,%rax,8),%xmm2
  jmp    L461
  xchg   %ax,%ax
L435:
  movslq %r12d,%rax
  movsd  (%r14,%rax,8),%xmm2
  jmp    L403
  xchg   %ax,%ax
L54:
  movslq %r12d,%rax
  movsd  (%r14,%rax,8),%xmm2
  jmp    L585
  xchg   %ax,%ax
L277:
  movslq %r12d,%rax
  movsd  (%r14,%rax,8),%xmm1
  jmp    L491
  xchg   %ax,%ax
L392:
  movslq %eax,%rdx
  movsd  (%rdi,%rdx,8),%xmm2
  jmp    L337
  nopl   (%rax)
L439:
  movslq %ebx,%rax
  movsd  (%r14,%rax,8),%xmm2
  jmp    L208
  xchg   %ax,%ax
L373:
  movslq %ebx,%rax
  movsd  (%r14,%rax,8),%xmm2
  jmp    L302
  xchg   %ax,%ax
L109:
  movslq %r12d,%rax
  movsd  (%r14,%rax,8),%xmm1
  jmp    L97
  xchg   %ax,%ax
L568:
  movslq %ebx,%rax
  movsd  (%r14,%rax,8),%xmm2
  jmp    L321
```

assistant: ```c
double sum(double *v, int low, int high) {
  if (low == high)
    return v[low];
  int mid = (low + high) / 2;
  return sum(v, low, mid) + sum(v, mid + 1, high);
}
```