user: 下面的汇编指令对应的C源代码是什么：

```asm
<main>:
  endbr64
  push   %r15
  lea    D23(%rip),%rsi
  lea    D126(%rip),%rdi
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x78,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x68(%rsp)
  xor    %eax,%eax
  call   <fopen@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L29
L48:
  lea    0x10(%rsp),%r12
  mov    %rbp,%rdx
  mov    $0x50,%esi
  mov    %r12,%rdi
  lea    D79(%rip),%rbx
  lea    D20(%rip),%r13
  call   <fgets@plt>
  jmp    L80
  cs nopw 0x0(%rax,%rax,1)
L85:
  mov    %r12,%rdi
  mov    %rbp,%rdx
  mov    $0x50,%esi
  call   <fgets@plt>
  mov    %rbp,%rdi
  call   <feof@plt>
  test   %rax,%rax
  jne    L54
L80:
  mov    $0x17,%edx
  mov    %rbx,%rsi
  mov    %r12,%rdi
  call   <strncmp@plt>
  test   %rax,%rax
  jne    L85
  lea    0x4(%rsp),%rdx
  lea    D6(%rip),%rsi
  mov    %rbp,%rdi
  call   <fscanf@plt>
  mov    %r12,%rsi
  lea    D30(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  lea    D11(%rip),%rcx
  xor    %eax,%eax
  lea    D115(%rip),%rdx
  lea    D80(%rip),%rsi
  lea    D32(%rip),%rdi
  call   <printf@plt>
  mov    0x4(%rsp),%eax
  test   %eax,%eax
  jle    L40
  mov    $0x1,%r12d
  lea    0x8(%rsp),%r15
  lea    0xc(%rsp),%r14
  lea    D111(%rip),%r13
  lea    D45(%rip),%rbx
  nopl   0x0(%rax)
L46:
  mov    %r15,%rcx
  mov    %r14,%rdx
  mov    %r13,%rsi
  mov    %rbp,%rdi
  xor    %eax,%eax
  add    $0x1,%r12d
  call   <fscanf@plt>
  movss  0xc(%rsp),%xmm0
  call   <ei@plt>
  pxor   %xmm1,%xmm1
  mov    %rbx,%rdi
  mov    $0x3,%eax
  movapd %xmm0,%xmm2
  pxor   %xmm0,%xmm0
  cvtss2sd 0x8(%rsp),%xmm1
  cvtss2sd 0xc(%rsp),%xmm0
  call   <printf@plt>
  cmp    %r12d,0x4(%rsp)
  jge    L46
L40:
  mov    %rbp,%rdi
  call   <fclose@plt>
  mov    0x68(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L75
  add    $0x78,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nop
L54:
  mov    %r13,%rdi
  call   <nrerror@plt>
  jmp    L80
L29:
  lea    D77(%rip),%rdi
  call   <nrerror@plt>
  jmp    L48
L75:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: data_tag: D23
type_guessed: string
name: retrieve_data
arguments: data_tag: D126
type_guessed: string
name: retrieve_data
arguments: data_tag: D79
type_guessed: string
name: retrieve_data
arguments: data_tag: D20
type_guessed: string
name: retrieve_data
arguments: data_tag: D6
type_guessed: string
name: retrieve_data
arguments: data_tag: D30
type_guessed: string
name: retrieve_data
arguments: data_tag: D11
type_guessed: string
name: retrieve_data
arguments: data_tag: D115
type_guessed: string
name: retrieve_data
arguments: data_tag: D80
type_guessed: string
name: retrieve_data
arguments: data_tag: D32
type_guessed: string
name: retrieve_data
arguments: data_tag: D111
type_guessed: string
name: retrieve_data
arguments: data_tag: D45
type_guessed: string
name: retrieve_data
arguments: data_tag: D77
type_guessed: string

tool: D23: r

tool: D126: fncval.dat

tool: D79: Exponential Integral Ei

tool: D20: Data not found in fncval.dat


tool: D6: %d %*s

tool: D30: 
%s


tool: D11: ei(x)

tool: D115: actual

tool: D80: x

tool: D32: %5s %12s %11s 


tool: D111: %f %f

tool: D45: %6.2f %12.6f %12.6f


tool: D77: Data file fncval.dat not found


assistant: ```c
int main(void) {
  char txt[80];
  int i, nval;
  float val, x;
  FILE *fp;
  if ((fp = fopen("fncval.dat", "r")) == NULL)
    nrerror("Data file fncval.dat not found\n");
  fgets(txt, 80, fp);
  while (strncmp(txt, "Exponential Integral Ei", 23)) {
    fgets(txt, 80, fp);
    if (feof(fp))
      nrerror("Data not found in fncval.dat\n");
  }
  fscanf(fp, "%d %*s", &nval);
  printf("\n%s\n", txt);
  printf("%5s %12s %11s \n", "x", "actual", "ei(x)");
  for (i = 1; i <= nval; i++) {
    fscanf(fp, "%f %f", &x, &val);
    printf("%6.2f %12.6f %12.6f\n", x, val, ei(x));
  }
  fclose(fp);
  return 0;
}
```