user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<iterative_merge>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %rbx
  sub    $0x48,%rsp
  mov    %rdi,-0x48(%rbp)
  mov    %rsi,-0x50(%rbp)
  mov    -0x50(%rbp),%rax
  shr    %rax
  mov    %eax,%edi
  call   <log@plt>
  mov    %eax,%ebx
  mov    $0x2,%edi
  call   <log@plt>
  mov    %eax,%esi
  mov    %ebx,%eax
  cltd
  idiv   %esi
  mov    %eax,%edi
  call   <floor@plt>
  mov    %eax,%esi
  mov    $0x2,%edi
  call   <pow@plt>
  mov    %eax,-0x24(%rbp)
  mov    -0x24(%rbp),%eax
  add    %eax,%eax
  movslq %eax,%rcx
  mov    -0x50(%rbp),%rax
  sub    %rcx,%rax
  mov    %rax,%rdx
  mov    -0x24(%rbp),%eax
  cltq
  cmp    %rax,%rdx
  cmovae %rdx,%rax
  mov    %eax,-0x20(%rbp)
  mov    -0x20(%rbp),%eax
  cltq
  shl    $0x2,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x18(%rbp)
  mov    -0x20(%rbp),%eax
  cltq
  shl    $0x2,%eax
  mov    %eax,%edx
  mov    -0x18(%rbp),%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  movl   $0x1,-0x30(%rbp)
  jmp    L182
L155:
  mov    -0x30(%rbp),%eax
  cltq
  mov    -0x50(%rbp),%rdx
  shr    %rdx
  cmp    %rdx,%rax
  ja     L105
  movl   $0x0,-0x40(%rbp)
  mov    -0x30(%rbp),%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x38(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0x3c(%rbp)
  mov    -0x3c(%rbp),%edx
  mov    -0x30(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x34(%rbp)
  jmp    L27
L105:
  movl   $0x0,-0x40(%rbp)
  mov    -0x50(%rbp),%rax
  mov    -0x30(%rbp),%edx
  sub    %edx,%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x38(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0x3c(%rbp)
  mov    -0x50(%rbp),%rax
  sub    $0x1,%eax
  mov    %eax,-0x34(%rbp)
  mov    -0x30(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x50(%rbp),%rax
  sub    %rdx,%rax
  shl    $0x2,%eax
  mov    %eax,%edx
  mov    -0x30(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x48(%rbp),%rax
  add    %rax,%rcx
  mov    -0x18(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
  mov    -0x30(%rbp),%eax
  cltq
  shl    $0x2,%eax
  mov    %eax,%edx
  mov    -0x30(%rbp),%eax
  movslq %eax,%rcx
  mov    -0x50(%rbp),%rax
  sub    %rcx,%rax
  lea    0x0(,%rax,4),%rcx
  mov    -0x48(%rbp),%rax
  add    %rax,%rcx
  mov    -0x48(%rbp),%rax
  mov    %rax,%rsi
  mov    %rcx,%rdi
  call   <memmove@plt>
L27:
  movl   $0x0,-0x28(%rbp)
  mov    -0x28(%rbp),%eax
  mov    %eax,-0x2c(%rbp)
  jmp    L65
L103:
  mov    -0x30(%rbp),%eax
  cltq
  mov    -0x50(%rbp),%rdx
  shr    %rdx
  cmp    %rdx,%rax
  ja     L195
  mov    -0x3c(%rbp),%eax
  sub    -0x40(%rbp),%eax
  add    $0x1,%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x1c(%rbp),%eax
  cltq
  shl    $0x2,%eax
  mov    %eax,%edx
  mov    -0x40(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x48(%rbp),%rax
  add    %rax,%rcx
  mov    -0x18(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcpy@plt>
L195:
  movl   $0x0,-0x28(%rbp)
  jmp    L183
L18:
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x28(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x18(%rbp),%rax
  add    %rcx,%rax
  mov    (%rax),%eax
  cmp    %eax,%edx
  jge    L167
  mov    -0x38(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x38(%rbp)
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    -0x2c(%rbp),%edx
  movslq %edx,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x48(%rbp),%rdx
  add    %rcx,%rdx
  mov    (%rax),%eax
  mov    %eax,(%rdx)
  jmp    L20
L167:
  mov    -0x28(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x28(%rbp)
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    -0x2c(%rbp),%edx
  movslq %edx,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x48(%rbp),%rdx
  add    %rcx,%rdx
  mov    (%rax),%eax
  mov    %eax,(%rdx)
L20:
  addl   $0x1,-0x2c(%rbp)
L183:
  mov    -0x3c(%rbp),%eax
  sub    -0x40(%rbp),%eax
  cmp    %eax,-0x28(%rbp)
  jg     L153
  mov    -0x38(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jle    L18
  jmp    L153
L6:
  mov    -0x28(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x28(%rbp)
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x2c(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x2c(%rbp)
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rax,%rdx
  mov    (%rcx),%eax
  mov    %eax,(%rdx)
L153:
  mov    -0x3c(%rbp),%eax
  sub    -0x40(%rbp),%eax
  cmp    %eax,-0x28(%rbp)
  jle    L6
  jmp    L144
L169:
  mov    -0x38(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x38(%rbp)
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x2c(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x2c(%rbp)
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rax,%rdx
  mov    (%rcx),%eax
  mov    %eax,(%rdx)
L144:
  mov    -0x38(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jle    L169
  mov    -0x38(%rbp),%eax
  mov    %eax,-0x40(%rbp)
  mov    -0x38(%rbp),%edx
  mov    -0x30(%rbp),%eax
  add    %edx,%eax
  cltq
  cmp    %rax,-0x50(%rbp)
  jbe    L111
  mov    -0x38(%rbp),%edx
  mov    -0x30(%rbp),%eax
  add    %edx,%eax
  jmp    L148
L111:
  mov    -0x50(%rbp),%rax
  sub    $0x1,%eax
L148:
  mov    %eax,-0x38(%rbp)
  mov    -0x38(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0x3c(%rbp)
  mov    -0x3c(%rbp),%edx
  mov    -0x30(%rbp),%eax
  add    %edx,%eax
  cltq
  cmp    %rax,-0x50(%rbp)
  jbe    L124
  mov    -0x3c(%rbp),%edx
  mov    -0x30(%rbp),%eax
  add    %edx,%eax
  jmp    L33
L124:
  mov    -0x50(%rbp),%rax
  sub    $0x1,%eax
L33:
  mov    %eax,-0x34(%rbp)
L65:
  mov    -0x2c(%rbp),%eax
  cltq
  cmp    %rax,-0x50(%rbp)
  ja     L103
  shll   -0x30(%rbp)
L182:
  mov    -0x30(%rbp),%eax
  cltq
  cmp    %rax,-0x50(%rbp)
  ja     L155
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  nop
  mov    -0x8(%rbp),%rbx
  leave
  ret
```

assistant: ```c
void iterative_merge(int a[], size_t n) {
  int t = pow(2, floor(log(n / 2) / log(2)));
  int tempsize = (t > n - 2 * t) ? t : n - 2 * t;
  int *temparray = (int *)malloc(tempsize * sizeof(int));
  memset(temparray, 0, tempsize * sizeof(int));
  int l, l_max, r, r_max, incr, i, j, cpy_size;
  incr = 1;
  while (incr < n) {
    if (incr <= n / 2) {
      l = 0;
      r = incr;
      l_max = r - 1;
      r_max = l_max + incr;
    } else {
      l = 0;
      r = n - incr;
      l_max = r - 1;
      r_max = n - 1;
      memcpy(temparray, &a[incr], (n - incr) * sizeof(int));
      memmove(&a[n - incr], &a[0], incr * sizeof(int));
    }
    i = j = 0;
    while (i < n) {
      if (incr <= n / 2) {
        cpy_size = l_max - l + 1;
        memcpy(temparray, &a[l], cpy_size * sizeof(int));
      }
      j = 0;
      while (j <= l_max - l && r <= r_max) {
        if (a[r] < temparray[j]) {
          a[i] = a[r++];
        } else {
          a[i] = temparray[j++];
        }
        ++i;
      }
      while (j <= l_max - l) {
        a[i++] = temparray[j++];
      }
      while (r <= r_max) {
        a[i++] = a[r++];
      }
      l = r;
      r = (r + incr < n) ? r + incr : n - 1;
      l_max = r - 1;
      r_max = (l_max + incr < n) ? l_max + incr : n - 1;
    }
    incr *= 2;
  }
  free(temparray);
  return;
}
```