user: 这段汇编代码用C语言表示是什么样的:

```asm
<indexx>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rsi,%rbp
  mov    %rdx,%rbx
  movslq %edi,%r12
  mov    $0x186a0,%esi
  mov    $0x1,%edi
  mov    $0x0,%eax
  call   <ivector@plt>
  movslq %eax,%r15
  test   %r12,%r12
  je     L169
  mov    $0x1,%eax
L78:
  mov    %eax,(%rbx,%rax,4)
  mov    %rax,%rdx
  add    $0x1,%rax
  cmp    %rdx,%r12
  jne    L78
L169:
  mov    $0x0,%r14d
  mov    $0x1,%ecx
  jmp    L229
L192:
  mov    %rcx,%rax
L119:
  mov    %edi,0x4(%rbx,%rax,4)
  lea    0x1(%rcx),%rax
  add    $0x2,%rcx
  cmp    %rcx,%r12
  jb     L170
  mov    %rax,%rcx
L74:
  mov    0x4(%rbx,%rcx,4),%edi
  movslq %edi,%rax
  movss  0x0(%rbp,%rax,4),%xmm0
  test   %rcx,%rcx
  je     L192
  mov    %rcx,%rax
L208:
  mov    (%rbx,%rax,4),%edx
  movslq %edx,%rsi
  comiss 0x0(%rbp,%rsi,4),%xmm0
  jae    L119
  mov    %edx,0x4(%rbx,%rax,4)
  sub    $0x1,%rax
  jne    L208
  jmp    L119
L170:
  test   %r14d,%r14d
  je     L221
  movslq %r14d,%rax
  movslq (%r15,%rax,4),%r12
  sub    $0x2,%r14d
  movslq -0x4(%r15,%rax,4),%rcx
L229:
  mov    %r12,%rax
  sub    %rcx,%rax
  cmp    $0x6,%rax
  ja     L173
  lea    0x1(%rcx),%rax
  cmp    %rax,%r12
  jae    L74
  jmp    L170
L173:
  lea    (%r12,%rcx,1),%rax
  shr    %rax
  lea    (%rbx,%rax,4),%rdx
  mov    (%rdx),%esi
  lea    0x1(%rcx),%r13
  lea    0x0(,%r13,4),%rdi
  lea    (%rbx,%rdi,1),%rax
  mov    (%rax),%r8d
  mov    %r8d,(%rdx)
  mov    %esi,(%rax)
  lea    (%rbx,%r12,4),%rdx
  mov    (%rdx),%r8d
  movslq %esi,%r10
  movslq %r8d,%r9
  movss  0x0(%rbp,%r10,4),%xmm0
  comiss 0x0(%rbp,%r9,4),%xmm0
  jbe    L155
  mov    %r8d,(%rax)
  mov    %esi,(%rdx)
L155:
  lea    -0x4(%rbx,%rdi,1),%r10
  mov    %r10,(%rsp)
  mov    (%r10),%esi
  mov    (%rdx),%edi
  movslq %esi,%r9
  movslq %edi,%r8
  movss  0x0(%rbp,%r9,4),%xmm0
  comiss 0x0(%rbp,%r8,4),%xmm0
  jbe    L163
  mov    %edi,(%r10)
  mov    %esi,(%rdx)
L163:
  mov    (%rax),%edx
  mov    (%rsp),%r9
  mov    (%r9),%esi
  movslq %edx,%r8
  movslq %esi,%rdi
  movss  0x0(%rbp,%r8,4),%xmm0
  comiss 0x0(%rbp,%rdi,4),%xmm0
  jbe    L213
  mov    %esi,(%rax)
  mov    %edx,(%r9)
L213:
  mov    (%rsp),%rax
  mov    (%rax),%eax
  mov    %eax,0xc(%rsp)
  cltq
  movss  0x0(%rbp,%rax,4),%xmm1
  mov    %r12,%rdx
  jmp    L196
L158:
  mov    %r10,%r13
L196:
  lea    0x1(%r13),%r10
  mov    (%rbx,%r10,4),%edi
  movslq %edi,%rax
  comiss 0x0(%rbp,%rax,4),%xmm1
  ja     L158
  lea    -0x4(%rbx,%rdx,4),%rax
L42:
  mov    %rdx,%r9
  sub    $0x1,%rdx
  mov    %rax,%r8
  mov    (%rax),%esi
  sub    $0x4,%rax
  movslq %esi,%r11
  movss  0x0(%rbp,%r11,4),%xmm0
  comiss %xmm1,%xmm0
  ja     L42
  cmp    %rdx,%r10
  ja     L162
  mov    %esi,(%rbx,%r10,4)
  mov    %edi,(%r8)
  jmp    L158
L162:
  mov    (%rsp),%rax
  mov    %esi,(%rax)
  mov    0xc(%rsp),%eax
  mov    %eax,(%r8)
  add    $0x2,%r14d
  mov    %r12,%rsi
  sub    %r13,%rsi
  mov    %rdx,%rax
  sub    %rcx,%rax
  cmp    %rax,%rsi
  jb     L15
  movslq %r14d,%rax
  mov    %r12d,(%r15,%rax,4)
  mov    %r10d,-0x4(%r15,%rax,4)
  lea    -0x2(%r9),%r12
  jmp    L229
L15:
  movslq %r14d,%rax
  sub    $0x1,%edx
  mov    %edx,(%r15,%rax,4)
  mov    %ecx,-0x4(%r15,%rax,4)
  mov    %r10,%rcx
  jmp    L229
L221:
  mov    $0x186a0,%edx
  mov    $0x1,%esi
  mov    %r15,%rdi
  mov    $0x0,%eax
  call   <free_ivector@plt>
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void indexx(n, arr, indx) float arr[];
int indx[], n;
{
  unsigned long i, indxt, ir = n, itemp, j, k, l = 1;
  int jstack = 0, *istack;
  float a;
  istack = ivector(1, 100000);
  for (j = 1; j <= n; j++)
    indx[j] = j;
  for (;;) {
    if (ir - l < 7) {
      for (j = l + 1; j <= ir; j++) {
        indxt = indx[j];
        a = arr[indxt];
        for (i = j - 1; i >= 1; i--) {
          if (arr[indx[i]] <= a)
            break;
          indx[i + 1] = indx[i];
        }
        indx[i + 1] = indxt;
      }
      if (jstack == 0)
        break;
      ir = istack[jstack--];
      l = istack[jstack--];
    } else {
      k = (l + ir) >> 1;
      itemp = (indx[k]);
      (indx[k]) = (indx[l + 1]);
      (indx[l + 1]) = itemp;
      ;
      if (arr[indx[l + 1]] > arr[indx[ir]]) {
        itemp = (indx[l + 1]);
        (indx[l + 1]) = (indx[ir]);
        (indx[ir]) = itemp;
      }
      if (arr[indx[l]] > arr[indx[ir]]) {
        itemp = (indx[l]);
        (indx[l]) = (indx[ir]);
        (indx[ir]) = itemp;
      }
      if (arr[indx[l + 1]] > arr[indx[l]]) {
        itemp = (indx[l + 1]);
        (indx[l + 1]) = (indx[l]);
        (indx[l]) = itemp;
      }
      i = l + 1;
      j = ir;
      indxt = indx[l];
      a = arr[indxt];
      for (;;) {
        do
          i++;
        while (arr[indx[i]] < a);
        do
          j--;
        while (arr[indx[j]] > a);
        if (j < i)
          break;
        itemp = (indx[i]);
        (indx[i]) = (indx[j]);
        (indx[j]) = itemp;
      }
      indx[l] = indx[j];
      indx[j] = indxt;
      jstack += 2;
      if (ir - i + 1 >= j - l) {
        istack[jstack] = ir;
        istack[jstack - 1] = i;
        ir = j - 1;
      } else {
        istack[jstack] = j - 1;
        istack[jstack - 1] = l;
        l = i;
      }
    }
  }
  free_ivector(istack, 1, 100000);
}
```