user: 下面的汇编指令对应的C源代码是什么:

```asm
<mSort>:
  endbr64
  cmp    %ecx,%edx
  jl     L19
  ret
  nopl   0x0(%rax)
L19:
  lea    (%rdx,%rcx,1),%eax
  push   %r15
  push   %r14
  mov    %rsi,%r14
  push   %r13
  mov    %eax,%r13d
  push   %r12
  shr    $0x1f,%r13d
  mov    %edx,%r12d
  push   %rbp
  add    %eax,%r13d
  mov    %rdi,%rbp
  push   %rbx
  sar    %r13d
  mov    %ecx,%ebx
  sub    $0x18,%rsp
  cmp    %r13d,%edx
  jl     L127
  add    $0x1,%r13d
  cmp    %ebx,%r13d
  jl     L23
L30:
  add    $0x18,%rsp
  mov    %ebx,%r8d
  mov    %r13d,%ecx
  mov    %r12d,%edx
  pop    %rbx
  mov    %r14,%rsi
  mov    %rbp,%rdi
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    1050 <merge@plt>
  nopl   0x0(%rax)
L127:
  lea    (%rdx,%r13,1),%eax
  mov    %eax,%r15d
  shr    $0x1f,%r15d
  add    %eax,%r15d
  sar    %r15d
  cmp    %r15d,%edx
  jl     L46
L44:
  add    $0x1,%r15d
  cmp    %r15d,%r13d
  jg     L21
L35:
  mov    %r13d,%r8d
  mov    %r15d,%ecx
  mov    %r12d,%edx
  mov    %r14,%rsi
  mov    %rbp,%rdi
  add    $0x1,%r13d
  call   <merge@plt>
  cmp    %ebx,%r13d
  jge    L30
L23:
  lea    0x0(%r13,%rbx,1),%eax
  mov    %eax,%r15d
  shr    $0x1f,%r15d
  add    %eax,%r15d
  sar    %r15d
  cmp    %r15d,%r13d
  jl     L43
L78:
  add    $0x1,%r15d
  cmp    %r15d,%ebx
  jg     L41
L12:
  mov    %ebx,%r8d
  mov    %r15d,%ecx
  mov    %r13d,%edx
  mov    %r14,%rsi
  mov    %rbp,%rdi
  call   <merge@plt>
  jmp    L30
  nopl   (%rax)
L46:
  lea    (%rdx,%r15,1),%eax
  mov    %eax,%r9d
  shr    $0x1f,%r9d
  add    %eax,%r9d
  sar    %r9d
  mov    %r9d,%ecx
  mov    %r9d,0xc(%rsp)
  call   <mSort>
  mov    0xc(%rsp),%r9d
  mov    %r15d,%ecx
  mov    %r14,%rsi
  mov    %rbp,%rdi
  add    $0x1,%r9d
  mov    %r9d,%edx
  mov    %r9d,0xc(%rsp)
  call   <mSort>
  mov    0xc(%rsp),%ecx
  mov    %r15d,%r8d
  mov    %r12d,%edx
  mov    %r14,%rsi
  mov    %rbp,%rdi
  call   <merge@plt>
  jmp    L44
  nopw   0x0(%rax,%rax,1)
L41:
  lea    (%rbx,%r15,1),%eax
  mov    %r15d,%edx
  mov    %r14,%rsi
  mov    %rbp,%rdi
  mov    %eax,%r9d
  shr    $0x1f,%r9d
  add    %eax,%r9d
  sar    %r9d
  mov    %r9d,%ecx
  mov    %r9d,0xc(%rsp)
  call   <mSort>
  mov    0xc(%rsp),%r9d
  mov    %ebx,%ecx
  mov    %r14,%rsi
  mov    %rbp,%rdi
  add    $0x1,%r9d
  mov    %r9d,%edx
  mov    %r9d,0xc(%rsp)
  call   <mSort>
  mov    0xc(%rsp),%ecx
  mov    %ebx,%r8d
  mov    %r15d,%edx
  mov    %r14,%rsi
  mov    %rbp,%rdi
  call   <merge@plt>
  jmp    L12
  nop
L43:
  lea    0x0(%r13,%r15,1),%eax
  mov    %r13d,%edx
  mov    %r14,%rsi
  mov    %rbp,%rdi
  mov    %eax,%r9d
  shr    $0x1f,%r9d
  add    %eax,%r9d
  sar    %r9d
  mov    %r9d,%ecx
  mov    %r9d,0xc(%rsp)
  call   <mSort>
  mov    0xc(%rsp),%r9d
  mov    %r15d,%ecx
  mov    %r14,%rsi
  mov    %rbp,%rdi
  add    $0x1,%r9d
  mov    %r9d,%edx
  mov    %r9d,0xc(%rsp)
  call   <mSort>
  mov    0xc(%rsp),%ecx
  mov    %r15d,%r8d
  mov    %r13d,%edx
  mov    %r14,%rsi
  mov    %rbp,%rdi
  call   <merge@plt>
  jmp    L78
  nopl   0x0(%rax)
L21:
  lea    0x0(%r13,%r15,1),%eax
  mov    %r15d,%edx
  mov    %r14,%rsi
  mov    %rbp,%rdi
  mov    %eax,%r9d
  shr    $0x1f,%r9d
  add    %eax,%r9d
  sar    %r9d
  mov    %r9d,%ecx
  mov    %r9d,0xc(%rsp)
  call   <mSort>
  mov    0xc(%rsp),%r9d
  mov    %r13d,%ecx
  mov    %r14,%rsi
  mov    %rbp,%rdi
  add    $0x1,%r9d
  mov    %r9d,%edx
  mov    %r9d,0xc(%rsp)
  call   <mSort>
  mov    0xc(%rsp),%ecx
  mov    %r13d,%r8d
  mov    %r15d,%edx
  mov    %r14,%rsi
  mov    %rbp,%rdi
  call   <merge@plt>
  jmp    L35
```

assistant: ```c
void mSort(int a[], int tmp[], int left, int right) {
  if (left < right) {
    int center = (left + right) / 2;
    mSort(a, tmp, left, center);
    mSort(a, tmp, center + 1, right);
    merge(a, tmp, left, center + 1, right);
  }
}
```