user: Converte this assembly snippet into its equivalent C code:

```asm
<explaincol>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x10,%rsp
  mov    %edi,-0x4(%rbp)
  lea    D47(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <dbprintf@plt>
  cmpl   $0x50,-0x4(%rbp)
  jg     L63
  mov    -0x4(%rbp),%edx
  movslq %edx,%rax
  imul   $0x38e38e39,%rax,%rax
  shr    $0x20,%rax
  sar    %eax
  mov    %edx,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%eax
  mov    %eax,%ecx
  shl    $0x3,%ecx
  add    %eax,%ecx
  mov    %edx,%eax
  sub    %ecx,%eax
  lea    0x1(%rax),%edx
  mov    -0x4(%rbp),%eax
  movslq %eax,%rcx
  imul   $0x38e38e39,%rcx,%rcx
  shr    $0x20,%rcx
  sar    %ecx
  sar    $0x1f,%eax
  mov    %eax,%esi
  mov    %ecx,%eax
  sub    %esi,%eax
  add    $0x1,%eax
  mov    %eax,%esi
  lea    D32(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <dbprintf@plt>
  jmp    L8
L63:
  cmpl   $0xa1,-0x4(%rbp)
  jg     L58
  subl   $0x51,-0x4(%rbp)
  mov    -0x4(%rbp),%edx
  movslq %edx,%rax
  imul   $0x38e38e39,%rax,%rax
  shr    $0x20,%rax
  sar    %eax
  mov    %edx,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%eax
  mov    %eax,%ecx
  shl    $0x3,%ecx
  add    %eax,%ecx
  mov    %edx,%eax
  sub    %ecx,%eax
  lea    0x1(%rax),%edx
  mov    -0x4(%rbp),%eax
  movslq %eax,%rcx
  imul   $0x38e38e39,%rcx,%rcx
  shr    $0x20,%rcx
  sar    %ecx
  sar    $0x1f,%eax
  mov    %eax,%esi
  mov    %ecx,%eax
  sub    %esi,%eax
  add    $0x1,%eax
  mov    %eax,%esi
  lea    D37(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <dbprintf@plt>
  jmp    L8
L58:
  cmpl   $0xf2,-0x4(%rbp)
  jg     L45
  subl   $0xa2,-0x4(%rbp)
  mov    -0x4(%rbp),%edx
  movslq %edx,%rax
  imul   $0x38e38e39,%rax,%rax
  shr    $0x20,%rax
  sar    %eax
  mov    %edx,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%eax
  mov    %eax,%ecx
  shl    $0x3,%ecx
  add    %eax,%ecx
  mov    %edx,%eax
  sub    %ecx,%eax
  lea    0x1(%rax),%edx
  mov    -0x4(%rbp),%eax
  movslq %eax,%rcx
  imul   $0x38e38e39,%rcx,%rcx
  shr    $0x20,%rcx
  sar    %ecx
  sar    $0x1f,%eax
  mov    %eax,%esi
  mov    %ecx,%eax
  sub    %esi,%eax
  add    $0x1,%eax
  mov    %eax,%esi
  lea    D5(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <dbprintf@plt>
  jmp    L8
L45:
  cmpl   $0x143,-0x4(%rbp)
  jg     L8
  subl   $0xf3,-0x4(%rbp)
  mov    -0x4(%rbp),%edx
  movslq %edx,%rax
  imul   $0x38e38e39,%rax,%rax
  shr    $0x20,%rax
  sar    %eax
  mov    %edx,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%eax
  mov    %eax,%ecx
  shl    $0x3,%ecx
  add    %eax,%ecx
  mov    %edx,%eax
  sub    %ecx,%eax
  lea    0x1(%rax),%edx
  mov    -0x4(%rbp),%eax
  movslq %eax,%rcx
  imul   $0x38e38e39,%rcx,%rcx
  shr    $0x20,%rcx
  sar    %ecx
  sar    $0x1f,%eax
  mov    %eax,%esi
  mov    %ecx,%eax
  sub    %esi,%eax
  add    $0x1,%eax
  mov    %eax,%esi
  lea    D48(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <dbprintf@plt>
L8:
  nop
  leave
  ret
```

tool_calls: name: unpack_data
arguments: data_label: D47
type_infered: string
name: unpack_data
arguments: data_label: D32
type_infered: string
name: unpack_data
arguments: data_label: D37
type_infered: string
name: unpack_data
arguments: data_label: D5
type_infered: string
name: unpack_data
arguments: data_label: D48
type_infered: string

tool: D47: ==> 

tool: D32: row %d col %d


tool: D37: row %d val %d


tool: D5: col %d val %d


tool: D48: box %d val %d


assistant: ```c
void explaincol(int c) {
  dbprintf("==> ");
  if (c < 81) {
    dbprintf("row %d col %d\n", c / 9 + 1, c % 9 + 1);
  } else if (c < 162) {
    c -= 81;
    dbprintf("row %d val %d\n", c / 9 + 1, c % 9 + 1);
  } else if (c < 243) {
    c -= 162;
    dbprintf("col %d val %d\n", c / 9 + 1, c % 9 + 1);
  } else if (c < 324) {
    c -= 243;
    dbprintf("box %d val %d\n", c / 9 + 1, c % 9 + 1);
  }
}
```