user: What would the C source look like for the assembly code provided here:

```asm
<TopDownSplitMerge>:
  endbr64
  mov    %edx,%eax
  sub    %esi,%eax
  cmp    $0x1,%eax
  jle    L88
  lea    (%rdx,%rsi,1),%eax
  push   %r15
  mov    %edx,%r15d
  push   %r14
  mov    %esi,%r14d
  push   %r13
  mov    %eax,%r13d
  shr    $0x1f,%r13d
  push   %r12
  mov    %rdi,%r12
  add    %eax,%r13d
  push   %rbp
  mov    %rcx,%rbp
  push   %rbx
  sar    %r13d
  mov    %r13d,%eax
  sub    %esi,%eax
  sub    $0x18,%rsp
  cmp    $0x1,%eax
  jle    L100
  lea    (%rsi,%r13,1),%eax
  mov    %eax,%ebx
  shr    $0x1f,%ebx
  add    %eax,%ebx
  sar    %ebx
  mov    %ebx,%eax
  sub    %esi,%eax
  cmp    $0x1,%eax
  jle    L13
  lea    (%rsi,%rbx,1),%eax
  mov    %eax,%r9d
  shr    $0x1f,%r9d
  add    %eax,%r9d
  sar    %r9d
  mov    %r9d,%eax
  sub    %esi,%eax
  cmp    $0x1,%eax
  jle    L79
  lea    (%rsi,%r9,1),%eax
  mov    %eax,%r10d
  shr    $0x1f,%r10d
  add    %eax,%r10d
  sar    %r10d
  mov    %r10d,%eax
  sub    %esi,%eax
  cmp    $0x1,%eax
  jle    L76
  lea    (%rsi,%r10,1),%eax
  mov    %r9d,0xc(%rsp)
  mov    %eax,%r11d
  mov    %r10d,0x4(%rsp)
  shr    $0x1f,%r11d
  add    %eax,%r11d
  sar    %r11d
  mov    %r11d,%edx
  mov    %r11d,0x8(%rsp)
  call   <TopDownSplitMerge>
  mov    0x4(%rsp),%edx
  mov    0x8(%rsp),%esi
  mov    %rbp,%rcx
  mov    %r12,%rdi
  call   <TopDownSplitMerge>
  mov    0x4(%rsp),%ecx
  mov    0x8(%rsp),%edx
  mov    %rbp,%r8
  mov    %r14d,%esi
  mov    %r12,%rdi
  call   <TopDownMerge@plt>
  mov    0x4(%rsp),%edx
  mov    %r12,%rcx
  mov    %r14d,%esi
  mov    %rbp,%rdi
  call   <CopyArray@plt>
  mov    0xc(%rsp),%r9d
  mov    0x4(%rsp),%r10d
L76:
  mov    %r9d,%eax
  sub    %r10d,%eax
  cmp    $0x1,%eax
  jle    L193
  lea    (%r9,%r10,1),%eax
  mov    %r10d,%esi
  mov    %rbp,%rcx
  mov    %r12,%rdi
  mov    %eax,%r11d
  mov    %r9d,0x8(%rsp)
  shr    $0x1f,%r11d
  mov    %r10d,0xc(%rsp)
  add    %eax,%r11d
  sar    %r11d
  mov    %r11d,%edx
  mov    %r11d,0x4(%rsp)
  call   <TopDownSplitMerge>
  mov    0x8(%rsp),%edx
  mov    0x4(%rsp),%esi
  mov    %rbp,%rcx
  mov    %r12,%rdi
  call   <TopDownSplitMerge>
  mov    0xc(%rsp),%r10d
  mov    %rbp,%r8
  mov    %r12,%rdi
  mov    0x4(%rsp),%edx
  mov    0x8(%rsp),%ecx
  mov    %r10d,%esi
  mov    %r10d,0x4(%rsp)
  call   <TopDownMerge@plt>
  mov    0x8(%rsp),%edx
  mov    0x4(%rsp),%esi
  mov    %r12,%rcx
  mov    %rbp,%rdi
  call   <CopyArray@plt>
  mov    0x8(%rsp),%r9d
  mov    0x4(%rsp),%r10d
L193:
  mov    %r9d,%ecx
  mov    %r10d,%edx
  mov    %rbp,%r8
  mov    %r14d,%esi
  mov    %r12,%rdi
  mov    %r9d,0x4(%rsp)
  call   <TopDownMerge@plt>
  mov    0x4(%rsp),%edx
  mov    %r12,%rcx
  mov    %r14d,%esi
  mov    %rbp,%rdi
  call   <CopyArray@plt>
  mov    0x4(%rsp),%r9d
L79:
  mov    %ebx,%eax
  sub    %r9d,%eax
  cmp    $0x1,%eax
  jle    L95
  lea    (%rbx,%r9,1),%eax
  mov    %r9d,%esi
  mov    %rbp,%rcx
  mov    %r12,%rdi
  mov    %eax,%r10d
  mov    %r9d,0x8(%rsp)
  shr    $0x1f,%r10d
  add    %eax,%r10d
  sar    %r10d
  mov    %r10d,%edx
  mov    %r10d,0x4(%rsp)
  call   <TopDownSplitMerge>
  mov    0x4(%rsp),%esi
  mov    %rbp,%rcx
  mov    %ebx,%edx
  mov    %r12,%rdi
  call   <TopDownSplitMerge>
  mov    0x8(%rsp),%r9d
  mov    0x4(%rsp),%edx
  mov    %ebx,%ecx
  mov    %rbp,%r8
  mov    %r12,%rdi
  mov    %r9d,%esi
  mov    %r9d,0x4(%rsp)
  call   <TopDownMerge@plt>
  mov    0x4(%rsp),%esi
  mov    %r12,%rcx
  mov    %ebx,%edx
  mov    %rbp,%rdi
  call   <CopyArray@plt>
  mov    0x4(%rsp),%r9d
L95:
  mov    %ebx,%ecx
  mov    %r9d,%edx
  mov    %r14d,%esi
  mov    %r12,%rdi
  mov    %rbp,%r8
  call   <TopDownMerge@plt>
  mov    %r12,%rcx
  mov    %ebx,%edx
  mov    %r14d,%esi
  mov    %rbp,%rdi
  call   <CopyArray@plt>
L13:
  mov    %r13d,%eax
  sub    %ebx,%eax
  cmp    $0x1,%eax
  jle    L31
  lea    0x0(%r13,%rbx,1),%eax
  mov    %eax,%r9d
  shr    $0x1f,%r9d
  add    %eax,%r9d
  sar    %r9d
  mov    %r9d,%eax
  sub    %ebx,%eax
  cmp    $0x1,%eax
  jle    L109
  lea    (%rbx,%r9,1),%eax
  mov    %rbp,%rcx
  mov    %ebx,%esi
  mov    %r12,%rdi
  mov    %eax,%r10d
  mov    %r9d,0x4(%rsp)
  shr    $0x1f,%r10d
  add    %eax,%r10d
  sar    %r10d
  mov    %r10d,%edx
  mov    %r10d,0x8(%rsp)
  call   <TopDownSplitMerge>
  mov    0x4(%rsp),%edx
  mov    0x8(%rsp),%esi
  mov    %rbp,%rcx
  mov    %r12,%rdi
  call   <TopDownSplitMerge>
  mov    0x4(%rsp),%ecx
  mov    0x8(%rsp),%edx
  mov    %rbp,%r8
  mov    %ebx,%esi
  mov    %r12,%rdi
  call   <TopDownMerge@plt>
  mov    0x4(%rsp),%edx
  mov    %r12,%rcx
  mov    %ebx,%esi
  mov    %rbp,%rdi
  call   <CopyArray@plt>
  mov    0x4(%rsp),%r9d
L109:
  mov    %r13d,%eax
  sub    %r9d,%eax
  cmp    $0x1,%eax
  jle    L122
  lea    0x0(%r13,%r9,1),%eax
  mov    %r9d,%esi
  mov    %rbp,%rcx
  mov    %r12,%rdi
  mov    %eax,%r10d
  mov    %r9d,0x8(%rsp)
  shr    $0x1f,%r10d
  add    %eax,%r10d
  sar    %r10d
  mov    %r10d,%edx
  mov    %r10d,0x4(%rsp)
  call   <TopDownSplitMerge>
  mov    0x4(%rsp),%esi
  mov    %rbp,%rcx
  mov    %r13d,%edx
  mov    %r12,%rdi
  call   <TopDownSplitMerge>
  mov    0x8(%rsp),%r9d
  mov    %rbp,%r8
  mov    %r13d,%ecx
  mov    0x4(%rsp),%edx
  mov    %r12,%rdi
  mov    %r9d,%esi
  mov    %r9d,0x4(%rsp)
  call   <TopDownMerge@plt>
  mov    0x4(%rsp),%esi
  mov    %r12,%rcx
  mov    %r13d,%edx
  mov    %rbp,%rdi
  call   <CopyArray@plt>
  mov    0x4(%rsp),%r9d
L122:
  mov    %r13d,%ecx
  mov    %r9d,%edx
  mov    %ebx,%esi
  mov    %r12,%rdi
  mov    %rbp,%r8
  call   <TopDownMerge@plt>
  mov    %r12,%rcx
  mov    %r13d,%edx
  mov    %ebx,%esi
  mov    %rbp,%rdi
  call   <CopyArray@plt>
L31:
  mov    %r13d,%ecx
  mov    %ebx,%edx
  mov    %r14d,%esi
  mov    %r12,%rdi
  mov    %rbp,%r8
  call   <TopDownMerge@plt>
  mov    %r12,%rcx
  mov    %r13d,%edx
  mov    %r14d,%esi
  mov    %rbp,%rdi
  call   <CopyArray@plt>
L100:
  mov    %r15d,%eax
  sub    %r13d,%eax
  cmp    $0x1,%eax
  jle    L161
  lea    (%r15,%r13,1),%eax
  mov    %eax,%ebx
  shr    $0x1f,%ebx
  add    %eax,%ebx
  sar    %ebx
  mov    %ebx,%eax
  sub    %r13d,%eax
  cmp    $0x1,%eax
  jle    L205
  lea    0x0(%r13,%rbx,1),%eax
  mov    %eax,%r9d
  shr    $0x1f,%r9d
  add    %eax,%r9d
  sar    %r9d
  mov    %r9d,%eax
  sub    %r13d,%eax
  cmp    $0x1,%eax
  jle    L6
  lea    0x0(%r13,%r9,1),%eax
  mov    %rbp,%rcx
  mov    %r13d,%esi
  mov    %r12,%rdi
  mov    %eax,%r10d
  mov    %r9d,0x4(%rsp)
  shr    $0x1f,%r10d
  add    %eax,%r10d
  sar    %r10d
  mov    %r10d,%edx
  mov    %r10d,0x8(%rsp)
  call   <TopDownSplitMerge>
  mov    0x4(%rsp),%edx
  mov    0x8(%rsp),%esi
  mov    %rbp,%rcx
  mov    %r12,%rdi
  call   <TopDownSplitMerge>
  mov    0x4(%rsp),%ecx
  mov    0x8(%rsp),%edx
  mov    %rbp,%r8
  mov    %r13d,%esi
  mov    %r12,%rdi
  call   <TopDownMerge@plt>
  mov    0x4(%rsp),%edx
  mov    %r12,%rcx
  mov    %r13d,%esi
  mov    %rbp,%rdi
  call   <CopyArray@plt>
  mov    0x4(%rsp),%r9d
L6:
  mov    %ebx,%eax
  sub    %r9d,%eax
  cmp    $0x1,%eax
  jle    L85
  lea    (%rbx,%r9,1),%eax
  mov    %r9d,%esi
  mov    %rbp,%rcx
  mov    %r12,%rdi
  mov    %eax,%r10d
  mov    %r9d,0x8(%rsp)
  shr    $0x1f,%r10d
  add    %eax,%r10d
  sar    %r10d
  mov    %r10d,%edx
  mov    %r10d,0x4(%rsp)
  call   <TopDownSplitMerge>
  mov    0x4(%rsp),%esi
  mov    %rbp,%rcx
  mov    %ebx,%edx
  mov    %r12,%rdi
  call   <TopDownSplitMerge>
  mov    0x8(%rsp),%r9d
  mov    0x4(%rsp),%edx
  mov    %ebx,%ecx
  mov    %rbp,%r8
  mov    %r12,%rdi
  mov    %r9d,%esi
  mov    %r9d,0x4(%rsp)
  call   <TopDownMerge@plt>
  mov    0x4(%rsp),%esi
  mov    %r12,%rcx
  mov    %ebx,%edx
  mov    %rbp,%rdi
  call   <CopyArray@plt>
  mov    0x4(%rsp),%r9d
L85:
  mov    %ebx,%ecx
  mov    %r9d,%edx
  mov    %r13d,%esi
  mov    %r12,%rdi
  mov    %rbp,%r8
  call   <TopDownMerge@plt>
  mov    %r12,%rcx
  mov    %ebx,%edx
  mov    %r13d,%esi
  mov    %rbp,%rdi
  call   <CopyArray@plt>
L205:
  mov    %r15d,%eax
  sub    %ebx,%eax
  cmp    $0x1,%eax
  jle    L200
  lea    (%r15,%rbx,1),%eax
  mov    %eax,%r9d
  shr    $0x1f,%r9d
  add    %eax,%r9d
  sar    %r9d
  mov    %r9d,%eax
  sub    %ebx,%eax
  cmp    $0x1,%eax
  jle    L63
  lea    (%rbx,%r9,1),%eax
  mov    %eax,%r10d
  shr    $0x1f,%r10d
  add    %eax,%r10d
  sar    %r10d
  mov    %r10d,%eax
  sub    %ebx,%eax
  cmp    $0x1,%eax
  jle    L149
  lea    (%rbx,%r10,1),%eax
  mov    %rbp,%rcx
  mov    %ebx,%esi
  mov    %r12,%rdi
  mov    %eax,%r11d
  mov    %r9d,0xc(%rsp)
  shr    $0x1f,%r11d
  mov    %r10d,0x4(%rsp)
  add    %eax,%r11d
  sar    %r11d
  mov    %r11d,%edx
  mov    %r11d,0x8(%rsp)
  call   <TopDownSplitMerge>
  mov    0x4(%rsp),%edx
  mov    0x8(%rsp),%esi
  mov    %rbp,%rcx
  mov    %r12,%rdi
  call   <TopDownSplitMerge>
  mov    0x4(%rsp),%ecx
  mov    0x8(%rsp),%edx
  mov    %rbp,%r8
  mov    %ebx,%esi
  mov    %r12,%rdi
  call   <TopDownMerge@plt>
  mov    0x4(%rsp),%edx
  mov    %r12,%rcx
  mov    %ebx,%esi
  mov    %rbp,%rdi
  call   <CopyArray@plt>
  mov    0xc(%rsp),%r9d
  mov    0x4(%rsp),%r10d
L149:
  mov    %r9d,%eax
  sub    %r10d,%eax
  cmp    $0x1,%eax
  jle    L71
  lea    (%r9,%r10,1),%eax
  mov    %r10d,%esi
  mov    %rbp,%rcx
  mov    %r12,%rdi
  mov    %eax,%r11d
  mov    %r9d,0x8(%rsp)
  shr    $0x1f,%r11d
  mov    %r10d,0xc(%rsp)
  add    %eax,%r11d
  sar    %r11d
  mov    %r11d,%edx
  mov    %r11d,0x4(%rsp)
  call   <TopDownSplitMerge>
  mov    0x8(%rsp),%edx
  mov    0x4(%rsp),%esi
  mov    %rbp,%rcx
  mov    %r12,%rdi
  call   <TopDownSplitMerge>
  mov    0xc(%rsp),%r10d
  mov    %rbp,%r8
  mov    %r12,%rdi
  mov    0x4(%rsp),%edx
  mov    0x8(%rsp),%ecx
  mov    %r10d,%esi
  mov    %r10d,0x4(%rsp)
  call   <TopDownMerge@plt>
  mov    0x8(%rsp),%edx
  mov    0x4(%rsp),%esi
  mov    %r12,%rcx
  mov    %rbp,%rdi
  call   <CopyArray@plt>
  mov    0x8(%rsp),%r9d
  mov    0x4(%rsp),%r10d
L71:
  mov    %r9d,%ecx
  mov    %r10d,%edx
  mov    %rbp,%r8
  mov    %ebx,%esi
  mov    %r12,%rdi
  mov    %r9d,0x4(%rsp)
  call   <TopDownMerge@plt>
  mov    0x4(%rsp),%edx
  mov    %r12,%rcx
  mov    %ebx,%esi
  mov    %rbp,%rdi
  call   <CopyArray@plt>
  mov    0x4(%rsp),%r9d
L63:
  mov    %r15d,%eax
  sub    %r9d,%eax
  cmp    $0x1,%eax
  jle    L121
  lea    (%r15,%r9,1),%eax
  mov    %eax,%r10d
  shr    $0x1f,%r10d
  add    %eax,%r10d
  sar    %r10d
  mov    %r10d,%eax
  sub    %r9d,%eax
  cmp    $0x1,%eax
  jle    L25
  lea    (%r9,%r10,1),%eax
  mov    %r9d,%esi
  mov    %rbp,%rcx
  mov    %r12,%rdi
  mov    %eax,%r11d
  mov    %r10d,0x8(%rsp)
  shr    $0x1f,%r11d
  mov    %r9d,0xc(%rsp)
  add    %eax,%r11d
  sar    %r11d
  mov    %r11d,%edx
  mov    %r11d,0x4(%rsp)
  call   <TopDownSplitMerge>
  mov    0x8(%rsp),%edx
  mov    0x4(%rsp),%esi
  mov    %rbp,%rcx
  mov    %r12,%rdi
  call   <TopDownSplitMerge>
  mov    0xc(%rsp),%r9d
  mov    %rbp,%r8
  mov    %r12,%rdi
  mov    0x4(%rsp),%edx
  mov    0x8(%rsp),%ecx
  mov    %r9d,%esi
  mov    %r9d,0x4(%rsp)
  call   <TopDownMerge@plt>
  mov    0x8(%rsp),%edx
  mov    0x4(%rsp),%esi
  mov    %r12,%rcx
  mov    %rbp,%rdi
  call   <CopyArray@plt>
  mov    0x8(%rsp),%r10d
  mov    0x4(%rsp),%r9d
L25:
  mov    %r15d,%eax
  sub    %r10d,%eax
  cmp    $0x1,%eax
  jle    L54
  lea    (%r15,%r10,1),%eax
  mov    %r10d,%esi
  mov    %rbp,%rcx
  mov    %r12,%rdi
  mov    %eax,%r11d
  mov    %r9d,0xc(%rsp)
  shr    $0x1f,%r11d
  mov    %r10d,0x8(%rsp)
  add    %eax,%r11d
  sar    %r11d
  mov    %r11d,%edx
  mov    %r11d,0x4(%rsp)
  call   <TopDownSplitMerge>
  mov    0x4(%rsp),%esi
  mov    %rbp,%rcx
  mov    %r15d,%edx
  mov    %r12,%rdi
  call   <TopDownSplitMerge>
  mov    0x8(%rsp),%r10d
  mov    %rbp,%r8
  mov    %r15d,%ecx
  mov    0x4(%rsp),%edx
  mov    %r12,%rdi
  mov    %r10d,%esi
  mov    %r10d,0x4(%rsp)
  call   <TopDownMerge@plt>
  mov    0x4(%rsp),%esi
  mov    %r12,%rcx
  mov    %r15d,%edx
  mov    %rbp,%rdi
  call   <CopyArray@plt>
  mov    0xc(%rsp),%r9d
  mov    0x4(%rsp),%r10d
L54:
  mov    %r9d,%esi
  mov    %r10d,%edx
  mov    %rbp,%r8
  mov    %r15d,%ecx
  mov    %r12,%rdi
  mov    %r9d,0x4(%rsp)
  call   <TopDownMerge@plt>
  mov    0x4(%rsp),%esi
  mov    %r12,%rcx
  mov    %r15d,%edx
  mov    %rbp,%rdi
  call   <CopyArray@plt>
  mov    0x4(%rsp),%r9d
L121:
  mov    %r15d,%ecx
  mov    %r9d,%edx
  mov    %ebx,%esi
  mov    %r12,%rdi
  mov    %rbp,%r8
  call   <TopDownMerge@plt>
  mov    %r12,%rcx
  mov    %r15d,%edx
  mov    %ebx,%esi
  mov    %rbp,%rdi
  call   <CopyArray@plt>
L200:
  mov    %r15d,%ecx
  mov    %ebx,%edx
  mov    %r13d,%esi
  mov    %r12,%rdi
  mov    %rbp,%r8
  call   <TopDownMerge@plt>
  mov    %r12,%rcx
  mov    %r15d,%edx
  mov    %r13d,%esi
  mov    %rbp,%rdi
  call   <CopyArray@plt>
L161:
  mov    %r15d,%ecx
  mov    %r13d,%edx
  mov    %r14d,%esi
  mov    %r12,%rdi
  mov    %rbp,%r8
  call   <TopDownMerge@plt>
  add    $0x18,%rsp
  mov    %r12,%rcx
  mov    %r15d,%edx
  pop    %rbx
  mov    %r14d,%esi
  mov    %rbp,%rdi
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    1070 <CopyArray@plt>
  nop
L88:
  ret
```

assistant: ```c
void TopDownSplitMerge(int *A, int iBegin, int iEnd, int *B) {
  if (iEnd - iBegin < 2)
    return;
  int iMiddle = (iEnd + iBegin) / 2;
#pragma omp parallel
  {
#pragma omp single
    {
#pragma omp task
        {TopDownSplitMerge(A, iBegin, iMiddle, B);
  }
#pragma omp task
  { TopDownSplitMerge(A, iMiddle, iEnd, B); }
#pragma omp taskwait
}
TopDownMerge(A, iBegin, iMiddle, iEnd, B);
CopyArray(B, iBegin, iEnd, A);
}
}
```