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

```asm
<print_usage_and_exit>:
  endbr64
  sub    $0x8,%rsp
  lea    D6(%rip),%rdi
  call   <printf@plt>
  xor    %edi,%edi
  add    $0x8,%rsp
  jmp    1070 <exit@plt>
```

tool_calls: name: parse_data
arguments: data_tag: D6
type_guessed: string

tool: D6: 
Usage: gkmmatrix [options] <pos_seqfile> <neg_seqfile> <output_kernel>

 build kernel matrix of gkm-SVM

Arguments:
 pos_seqfile: positive sequence file (fasta format)
 neg_seqfile: negative sequence file (fasta format)
 output_kernel: output kernel file

Options:
 -t <0 ~ 5>   set type of kernel function (default: 2)
                0 -- gapped-kmer (gkm)
                1 -- estimated l-mer with full filter
                2 -- estimated l-mer with truncated filter
                3 -- truncated filter + radial basis function (RBF)
                4 -- truncated filter + positional weights (PW)
                5 -- truncated filter + PW + RBF
 -l <int>     set word length, 3<=l<=12 (default: 10)
 -k <int>     set number of informative column, k<=l (default: 6)
 -d <int>     set maximum number of mismatches to consider, d<=4 (default: 3)
 -g <float>   set gamma for RBF kernel (-t 3 or 5) (default: 1.0)
 -v <0 ~ 4>   set the level of verbosity (default: 2)
                0 -- error msgs only (ERROR)
                1 -- warning msgs (WARN)
                2 -- progress msgs at coarse-grained level (INFO)
                3 -- progress msgs at fine-grained level (DEBUG)
                4 -- progress msgs at finer-grained level (TRACE)
-T <1|4|16>   set the number of threads for parallel calculation, 1, 4, or 16
              (default: 1)



assistant: ```c
void print_usage_and_exit() {
  printf("\n"
         "Usage: gkmmatrix [options] <pos_seqfile> <neg_seqfile> <output_kernel>\n"
         "\n"
         " build kernel matrix of gkm-SVM\n"
         "\n"
         "Arguments:\n"
         " pos_seqfile: positive sequence file (fasta format)\n"
         " neg_seqfile: negative sequence file (fasta format)\n"
         " output_kernel: output kernel file\n"
         "\n"
         "Options:\n"
         " -t <0 ~ 5>   set type of kernel function (default: 2)\n"
         "                0 -- gapped-kmer (gkm)\n"
         "                1 -- estimated l-mer with full filter\n"
         "                2 -- estimated l-mer with truncated filter\n"
         "                3 -- truncated filter + radial basis function (RBF)\n"
         "                4 -- truncated filter + positional weights (PW)\n"
         "                5 -- truncated filter + PW + RBF\n"
         " -l <int>     set word length, 3<=l<=12 (default: 10)\n"
         " -k <int>     set number of informative column, k<=l (default: 6)\n"
         " -d <int>     set maximum number of mismatches to consider, d<=4 (default: 3)\n"
         " -g <float>   set gamma for RBF kernel (-t 3 or 5) (default: 1.0)\n"
         " -v <0 ~ 4>   set the level of verbosity (default: 2)\n"
         "                0 -- error msgs only (ERROR)\n"
         "                1 -- warning msgs (WARN)\n"
         "                2 -- progress msgs at coarse-grained level (INFO)\n"
         "                3 -- progress msgs at fine-grained level (DEBUG)\n"
         "                4 -- progress msgs at finer-grained level (TRACE)\n"
         "-T <1|4|16>   set the number of threads for parallel calculation, 1, 4, or 16\n"
         "              (default: 1)\n"
         "\n");
  exit(0);
}
```