user: Please show me the C implementation that matches the assembly code listed below:

```asm
<enable_prefetch_core2>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    %edi,%ebx
  lea    D0(%rip),%rdi
  sub    $0x18,%rsp
  call   <puts@plt>
  cmp    $0xffffffff,%ebx
  je     L18
  mov    %ebx,0xc(%rsp)
L20:
  movabs $0x8000000000,%r12
  lea    D27(%rip),%r15
  movabs $0x2000000000,%rbp
  jmp    L27
  nopl   (%rax)
L45:
  mov    $0x1a0,%esi
  mov    %eax,%edi
  call   <read_msr@plt>
  mov    %r15,%rdi
  mov    %rax,%r14
  and    %r12,%rax
  cmp    $0x1,%rax
  mov    %r14,%rax
  mov    %r14,%rdx
  sbb    %esi,%esi
  and    %rbp,%rax
  and    $0xb,%esi
  cmp    $0x1,%rax
  sbb    %eax,%eax
  and    $0x80000,%edx
  lea    0x4e(%rsi),%r9d
  mov    %ebx,%esi
  and    $0xb,%eax
  cmp    $0x1,%rdx
  mov    %r14,%rdx
  sbb    %ecx,%ecx
  and    $0x200,%edx
  lea    0x4e(%rax),%r8d
  and    $0xb,%ecx
  add    $0x4e,%ecx
  cmp    $0x1,%rdx
  sbb    %edx,%edx
  xor    %eax,%eax
  and    $0xb,%edx
  add    $0x4e,%edx
  call   <printf@plt>
  mov    $0x1a0,%esi
  mov    %r13d,%edi
  movabs $0xffffff5ffff7fdff,%rdx
  and    %r14,%rdx
  call   <write_msr@plt>
  mov    $0x1a0,%esi
  mov    %r13d,%edi
  call   <read_msr@plt>
  mov    %rax,%rdx
  and    %r12,%rdx
  cmp    $0x1,%rdx
  mov    %rax,%rdx
  sbb    %edi,%edi
  and    %rbp,%rdx
  and    $0xb,%edi
  cmp    $0x1,%rdx
  mov    %rax,%rdx
  sbb    %esi,%esi
  and    $0x80000,%edx
  lea    0x4e(%rdi),%r9d
  and    $0xb,%esi
  cmp    $0x1,%rdx
  lea    D9(%rip),%rdi
  sbb    %ecx,%ecx
  and    $0x200,%eax
  lea    0x4e(%rsi),%r8d
  mov    %ebx,%esi
  and    $0xb,%ecx
  add    $0x4e,%ecx
  cmp    $0x1,%rax
  sbb    %edx,%edx
  xor    %eax,%eax
  add    $0x1,%ebx
  and    $0xb,%edx
  add    $0x4e,%edx
  call   <printf@plt>
  mov    %r13d,%edi
  call   <close@plt>
  cmp    %ebx,0xc(%rsp)
  jl     L36
L27:
  mov    %ebx,%edi
  call   <open_msr@plt>
  mov    %eax,%r13d
  test   %eax,%eax
  jns    L45
L36:
  add    $0x18,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nop
L18:
  movl   $0x400,0xc(%rsp)
  xor    %ebx,%ebx
  jmp    L20
```

tool_calls: name: retrieve_data
arguments: label: D0
datatype: string
name: retrieve_data
arguments: label: D27
datatype: string
name: retrieve_data
arguments: label: D9
datatype: string

tool: D0: Enable all prefetch

tool: D27: 	Core %d old : L2HW=%c L2ADJ=%c DCU=%c DCUIP=%c


tool: D9: 	Core %d new : L2HW=%c L2ADJ=%c DCU=%c DCUIP=%c


assistant: ```c
int enable_prefetch_core2(int core) {
  int fd;
  uint64_t result;
  int begin, end, c;
  printf("Enable all prefetch\n");
  if (core == -1) {
    begin = 0;
    end = 1024;
  } else {
    begin = core;
    end = core;
  }
  for (c = begin; c <= end; c++) {
    fd = open_msr(c);
    if (fd < 0)
      break;
    result = read_msr(fd, 0x1a0);
    printf("\tCore %d old : L2HW=%c L2ADJ=%c DCU=%c DCUIP=%c\n", c, result & (1ULL << 9) ? 'N' : 'Y', result & (1ULL << 19) ? 'N' : 'Y', result & (1ULL << 37) ? 'N' : 'Y', result & (1ULL << 39) ? 'N' : 'Y');
    result &= ~((1ULL << 9) | (1ULL << 19) | (1ULL << 37) | (1ULL << 39));
    result = write_msr(fd, 0x1a0, result);
    result = read_msr(fd, 0x1a0);
    printf("\tCore %d new : L2HW=%c L2ADJ=%c DCU=%c DCUIP=%c\n", c, result & (1ULL << 9) ? 'N' : 'Y', result & (1ULL << 19) ? 'N' : 'Y', result & (1ULL << 37) ? 'N' : 'Y', result & (1ULL << 39) ? 'N' : 'Y');
    close(fd);
  }
  return 0;
}
```