user: 请从给定的汇编指令推导出C源代码:

```asm
<merge_each>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x60,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %rdx,-0x48(%rbp)
  mov    %rcx,-0x50(%rbp)
  mov    %r8,-0x58(%rbp)
  mov    %r9,-0x60(%rbp)
  mov    -0x38(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x40(%rbp),%rax
  mov    %rax,-0x8(%rbp)
  mov    -0x48(%rbp),%rax
  mov    %rax,-0x28(%rbp)
  mov    -0x50(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x48(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  jmp    L51
L73:
  mov    -0x20(%rbp),%rax
  imul   -0x60(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x10(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x28(%rbp),%rax
  imul   -0x60(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x10(%rbp),%rax
  add    %rax,%rdx
  mov    0x10(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rdx,%rdi
  call   *%rax
  test   %eax,%eax
  jns    L71
  mov    -0x28(%rbp),%rax
  imul   -0x60(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x10(%rbp),%rax
  lea    (%rdx,%rax,1),%rsi
  mov    -0x18(%rbp),%rax
  imul   -0x60(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x8(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x60(%rbp),%rax
  mov    %rax,%rdx
  mov    %rcx,%rdi
  call   <memcpy@plt>
  addq   $0x1,-0x28(%rbp)
  addq   $0x1,-0x18(%rbp)
  jmp    L51
L71:
  mov    -0x20(%rbp),%rax
  imul   -0x60(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x10(%rbp),%rax
  lea    (%rdx,%rax,1),%rsi
  mov    -0x18(%rbp),%rax
  imul   -0x60(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x8(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x60(%rbp),%rax
  mov    %rax,%rdx
  mov    %rcx,%rdi
  call   <memcpy@plt>
  addq   $0x1,-0x20(%rbp)
  addq   $0x1,-0x18(%rbp)
L51:
  mov    -0x28(%rbp),%rax
  cmp    -0x50(%rbp),%rax
  jae    L66
  mov    -0x20(%rbp),%rax
  cmp    -0x58(%rbp),%rax
  jb     L73
  jmp    L66
L72:
  mov    -0x28(%rbp),%rax
  imul   -0x60(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x10(%rbp),%rax
  lea    (%rdx,%rax,1),%rsi
  mov    -0x18(%rbp),%rax
  imul   -0x60(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x8(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x60(%rbp),%rax
  mov    %rax,%rdx
  mov    %rcx,%rdi
  call   <memcpy@plt>
  addq   $0x1,-0x28(%rbp)
  addq   $0x1,-0x18(%rbp)
L66:
  mov    -0x28(%rbp),%rax
  cmp    -0x50(%rbp),%rax
  jb     L72
  jmp    L65
L8:
  mov    -0x20(%rbp),%rax
  imul   -0x60(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x10(%rbp),%rax
  lea    (%rdx,%rax,1),%rsi
  mov    -0x18(%rbp),%rax
  imul   -0x60(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x8(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x60(%rbp),%rax
  mov    %rax,%rdx
  mov    %rcx,%rdi
  call   <memcpy@plt>
  addq   $0x1,-0x20(%rbp)
  addq   $0x1,-0x18(%rbp)
L65:
  mov    -0x20(%rbp),%rax
  cmp    -0x58(%rbp),%rax
  jb     L8
  nop
  nop
  leave
  ret
```

assistant: ```c
void merge_each(void *base, void *sort, size_t i, size_t m, size_t n, size_t width, int (*cmp)(const void *, const void *)) {
  size_t j, k, l;
  char *base1 = (char *)base;
  char *sort1 = (char *)sort;
  j = i;
  k = m;
  l = i;
  while (j < m && k < n) {
    if (cmp(base1 + j * width, base1 + k * width) < 0) {
      memcpy(sort1 + l * width, base1 + j * width, width);
      ++j;
      ++l;
    } else {
      memcpy(sort1 + l * width, base1 + k * width, width);
      ++k;
      ++l;
    }
  }
  while (j < m) {
    memcpy(sort1 + l * width, base1 + j * width, width);
    ++j;
    ++l;
  }
  while (k < n) {
    memcpy(sort1 + l * width, base1 + k * width, width);
    ++k;
    ++l;
  }
}
```