user: 下面的汇编指令对应的C源代码是什么:

```asm
<merge>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %esi,-0x2c(%rbp)
  mov    %edx,-0x30(%rbp)
  mov    %ecx,-0x34(%rbp)
  mov    %r8d,-0x38(%rbp)
  mov    %r9,-0x40(%rbp)
  mov    -0x28(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x30(%rbp),%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x34(%rbp),%eax
  add    $0x1,%eax
  mov    %eax,-0x18(%rbp)
  movl   $0x0,-0x14(%rbp)
  mov    -0x38(%rbp),%eax
  sub    -0x30(%rbp),%eax
  add    $0x1,%eax
  imul   -0x2c(%rbp),%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  jne    L52
  mov    $0xffffffff,%eax
  jmp    L48
L136:
  mov    -0x1c(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jle    L128
  jmp    L121
L82:
  mov    -0x18(%rbp),%eax
  imul   -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x10(%rbp),%rax
  lea    (%rdx,%rax,1),%rsi
  mov    -0x14(%rbp),%eax
  imul   -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x8(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x2c(%rbp),%eax
  mov    %eax,%edx
  mov    %rcx,%rdi
  call   <memcpy@plt>
  addl   $0x1,-0x18(%rbp)
  addl   $0x1,-0x14(%rbp)
L121:
  mov    -0x18(%rbp),%eax
  cmp    -0x38(%rbp),%eax
  jle    L82
  jmp    L52
L128:
  mov    -0x18(%rbp),%eax
  cmp    -0x38(%rbp),%eax
  jle    L79
  jmp    L135
L83:
  mov    -0x1c(%rbp),%eax
  imul   -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x10(%rbp),%rax
  lea    (%rdx,%rax,1),%rsi
  mov    -0x14(%rbp),%eax
  imul   -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x8(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x2c(%rbp),%eax
  mov    %eax,%edx
  mov    %rcx,%rdi
  call   <memcpy@plt>
  addl   $0x1,-0x1c(%rbp)
  addl   $0x1,-0x14(%rbp)
L135:
  mov    -0x1c(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jle    L83
  jmp    L52
L79:
  mov    -0x18(%rbp),%eax
  imul   -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x10(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x1c(%rbp),%eax
  imul   -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x10(%rbp),%rax
  add    %rax,%rdx
  mov    -0x40(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rdx,%rdi
  call   *%rax
  test   %eax,%eax
  jns    L59
  mov    -0x1c(%rbp),%eax
  imul   -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x10(%rbp),%rax
  lea    (%rdx,%rax,1),%rsi
  mov    -0x14(%rbp),%eax
  imul   -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x8(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x2c(%rbp),%eax
  mov    %eax,%edx
  mov    %rcx,%rdi
  call   <memcpy@plt>
  addl   $0x1,-0x1c(%rbp)
  addl   $0x1,-0x14(%rbp)
  jmp    L52
L59:
  mov    -0x18(%rbp),%eax
  imul   -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x10(%rbp),%rax
  lea    (%rdx,%rax,1),%rsi
  mov    -0x14(%rbp),%eax
  imul   -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x8(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x2c(%rbp),%eax
  mov    %eax,%edx
  mov    %rcx,%rdi
  call   <memcpy@plt>
  addl   $0x1,-0x18(%rbp)
  addl   $0x1,-0x14(%rbp)
L52:
  mov    -0x1c(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jle    L136
  mov    -0x18(%rbp),%eax
  cmp    -0x38(%rbp),%eax
  jle    L136
  mov    -0x38(%rbp),%eax
  sub    -0x30(%rbp),%eax
  add    $0x1,%eax
  imul   -0x2c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x30(%rbp),%eax
  imul   -0x2c(%rbp),%eax
  movslq %eax,%rcx
  mov    -0x10(%rbp),%rax
  add    %rax,%rcx
  mov    -0x8(%rbp),%rax
  mov    %rax,%rsi
  mov    %rcx,%rdi
  call   <memcpy@plt>
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    $0x0,%eax
L48:
  leave
  ret
```

assistant: ```c
int merge(void *data, int esize, int i, int j, int k, int (*compare)(const void *key1, const void *key2)) {
  char *a = data, *m;
  int ipos, jpos, mpos;
  ipos = i;
  jpos = j + 1;
  mpos = 0;
  if ((m = (char *)malloc(esize * (k - i + 1))) == NULL)
    return -1;
  while (ipos <= j || jpos <= k) {
    if (ipos > j) {
      while (jpos <= k) {
        memcpy(&m[mpos * esize], &a[jpos * esize], esize);
        jpos++;
        mpos++;
      }
      continue;
    } else if (jpos > k) {
      while (ipos <= j) {
        memcpy(&m[mpos * esize], &a[ipos * esize], esize);
        ipos++;
        mpos++;
      }
      continue;
    }
    if (compare(&a[ipos * esize], &a[jpos * esize]) < 0) {
      memcpy(&m[mpos * esize], &a[ipos * esize], esize);
      ipos++;
      mpos++;
    } else {
      memcpy(&m[mpos * esize], &a[jpos * esize], esize);
      jpos++;
      mpos++;
    }
  }
  memcpy(&a[i * esize], m, esize * (k - i + 1));
  free(m);
  return 0;
}
```