user: What is the c source code of the assembly code below:

```asm
<mixed_sort_insertion>:
  endbr64
  cmp    %edx,%esi
  jge    L25
  push   %r15
  mov    %edx,%eax
  push   %r14
  sub    %esi,%eax
  mov    %rdi,%r14
  push   %r13
  push   %r12
  mov    %edx,%r12d
  push   %rbp
  mov    %esi,%ebp
  push   %rbx
  sub    $0x18,%rsp
  cmp    $0x13,%eax
  jle    L131
  lea    (%rsi,%rdx,1),%eax
  mov    %eax,%r13d
  shr    $0x1f,%r13d
  add    %eax,%r13d
  sar    %r13d
  cmp    %r13d,%esi
  jge    L112
  mov    %r13d,%eax
  sub    %esi,%eax
  cmp    $0x13,%eax
  jle    L105
  lea    (%rsi,%r13,1),%eax
  mov    %eax,%r15d
  shr    $0x1f,%r15d
  add    %eax,%r15d
  sar    %r15d
  cmp    %r15d,%esi
  jge    L2
  mov    %r15d,%eax
  sub    %esi,%eax
  cmp    $0x13,%eax
  jg     L96
  mov    %r15d,%edx
  call   <insertion_sort@plt>
L2:
  lea    0x1(%r15),%ebx
  cmp    %ebx,%r13d
  jle    L65
  mov    %r13d,%eax
  sub    %ebx,%eax
  cmp    $0x13,%eax
  jg     L135
  mov    %r13d,%edx
  mov    %ebx,%esi
  mov    %r14,%rdi
  call   <insertion_sort@plt>
L65:
  mov    %r13d,%ecx
  mov    %r15d,%edx
  mov    %ebp,%esi
  mov    %r14,%rdi
  call   <merge@plt>
L112:
  lea    0x1(%r13),%r15d
  cmp    %r12d,%r15d
  jge    L41
  mov    %r12d,%eax
  sub    %r15d,%eax
  cmp    $0x13,%eax
  jle    L26
  lea    (%r15,%r12,1),%eax
  mov    %eax,%ebx
  shr    $0x1f,%ebx
  add    %eax,%ebx
  sar    %ebx
  cmp    %ebx,%r15d
  jge    L100
  mov    %ebx,%eax
  sub    %r15d,%eax
  cmp    $0x13,%eax
  jg     L71
  mov    %ebx,%edx
  mov    %r15d,%esi
  mov    %r14,%rdi
  call   <insertion_sort@plt>
L100:
  lea    0x1(%rbx),%r8d
  cmp    %r8d,%r12d
  jle    L45
  mov    %r12d,%eax
  sub    %r8d,%eax
  cmp    $0x13,%eax
  jg     L7
  mov    %r12d,%edx
  mov    %r8d,%esi
  mov    %r14,%rdi
  call   <insertion_sort@plt>
L45:
  mov    %r12d,%ecx
  mov    %ebx,%edx
  mov    %r15d,%esi
  mov    %r14,%rdi
  call   <merge@plt>
L41:
  add    $0x18,%rsp
  mov    %r12d,%ecx
  mov    %r13d,%edx
  mov    %ebp,%esi
  pop    %rbx
  mov    %r14,%rdi
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    1060 <merge@plt>
  nopl   0x0(%rax,%rax,1)
L131:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    1070 <insertion_sort@plt>
  nopl   0x0(%rax,%rax,1)
L25:
  ret
  nopl   0x0(%rax)
L26:
  mov    %r12d,%edx
  mov    %r15d,%esi
  mov    %r14,%rdi
  call   <insertion_sort@plt>
  jmp    L41
L105:
  mov    %r13d,%edx
  call   <insertion_sort@plt>
  jmp    L112
  nopl   (%rax)
L135:
  lea    0x0(%r13,%rbx,1),%eax
  mov    %ebx,%esi
  mov    %r14,%rdi
  mov    %eax,%r8d
  shr    $0x1f,%r8d
  add    %eax,%r8d
  sar    %r8d
  mov    %r8d,%edx
  mov    %r8d,0x8(%rsp)
  call   <mixed_sort_insertion>
  mov    0x8(%rsp),%r8d
  mov    %r13d,%edx
  mov    %r14,%rdi
  lea    0x1(%r8),%esi
  call   <mixed_sort_insertion>
  mov    0x8(%rsp),%edx
  mov    %r13d,%ecx
  mov    %ebx,%esi
  mov    %r14,%rdi
  call   <merge@plt>
  jmp    L65
  xchg   %ax,%ax
L7:
  lea    (%r12,%r8,1),%eax
  mov    %r8d,%esi
  mov    %r14,%rdi
  mov    %r8d,0xc(%rsp)
  mov    %eax,%r9d
  shr    $0x1f,%r9d
  add    %eax,%r9d
  sar    %r9d
  mov    %r9d,%edx
  mov    %r9d,0x8(%rsp)
  call   <mixed_sort_insertion>
  mov    0x8(%rsp),%r9d
  mov    %r12d,%edx
  mov    %r14,%rdi
  lea    0x1(%r9),%esi
  call   <mixed_sort_insertion>
  mov    0x8(%rsp),%edx
  mov    0xc(%rsp),%esi
  mov    %r12d,%ecx
  mov    %r14,%rdi
  call   <merge@plt>
  jmp    L45
  nopl   (%rax)
L96:
  lea    (%rsi,%r15,1),%eax
  mov    %eax,%ebx
  shr    $0x1f,%ebx
  add    %eax,%ebx
  sar    %ebx
  mov    %ebx,%edx
  call   <mixed_sort_insertion>
  lea    0x1(%rbx),%esi
  mov    %r15d,%edx
  mov    %r14,%rdi
  call   <mixed_sort_insertion>
  mov    %r15d,%ecx
  mov    %ebx,%edx
  mov    %ebp,%esi
  mov    %r14,%rdi
  call   <merge@plt>
  jmp    L2
  xchg   %ax,%ax
L71:
  lea    (%r15,%rbx,1),%eax
  mov    %r15d,%esi
  mov    %r14,%rdi
  mov    %eax,%r8d
  shr    $0x1f,%r8d
  add    %eax,%r8d
  sar    %r8d
  mov    %r8d,%edx
  mov    %r8d,0x8(%rsp)
  call   <mixed_sort_insertion>
  mov    0x8(%rsp),%r8d
  mov    %ebx,%edx
  mov    %r14,%rdi
  lea    0x1(%r8),%esi
  call   <mixed_sort_insertion>
  mov    0x8(%rsp),%edx
  mov    %ebx,%ecx
  mov    %r15d,%esi
  mov    %r14,%rdi
  call   <merge@plt>
  jmp    L100
```

assistant: ```c
void mixed_sort_insertion(int A[], int p, int r) {
  if (p >= r)
    return;
  if (r - p < 20) {
    insertion_sort(A, p, r);
  } else {
    int q = (p + r) / 2;
    mixed_sort_insertion(A, p, q);
    mixed_sort_insertion(A, q + 1, r);
    merge(A, p, q, r);
  }
}
```