user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<rpn_eval>:
  endbr64
  push   %r15
  lea    D4(%rip),%rsi
  movq   %xmm0,%r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  sub    $0x18,%rsp
  call   <fopen@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L87
L56:
  lea    D49(%rip),%r12
  lea    D30(%rip),%r13
  lea    D27(%rip),%r14
  nopw   0x0(%rax,%rax,1)
L214:
  mov    %rbx,%rdi
  call   <nextword@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L11
L106:
  mov    %rbp,%rdi
  call   <atof@plt>
  pxor   %xmm2,%xmm2
  ucomisd %xmm2,%xmm0
  jp     L194
  jne    L194
  mov    %r12,%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L26
  movq   %r15,%xmm0
  call   <stack_push@plt>
  mov    %rbx,%rdi
  call   <nextword@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  jne    L106
L11:
  xor    %eax,%eax
  call   <stack_top@plt>
  cmp    $0x1,%eax
  je     L72
  lea    D0(%rip),%rdi
  call   <puts@plt>
  mov    $0x1,%edi
  call   <exit@plt>
L72:
  add    $0x18,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    1210 <stack_pop@plt>
L204:
  lea    D126(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L214
  call   <stack_pop@plt>
  call   <exp@plt>
  nopl   0x0(%rax,%rax,1)
L194:
  call   <stack_push@plt>
  jmp    L214
  nopw   0x0(%rax,%rax,1)
L26:
  mov    %r13,%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L13
  call   <stack_pop@plt>
  xor    %eax,%eax
  movsd  %xmm0,0x8(%rsp)
  call   <stack_pop@plt>
  addsd  0x8(%rsp),%xmm0
  call   <stack_push@plt>
  jmp    L214
  nopw   0x0(%rax,%rax,1)
L13:
  mov    %r14,%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L104
  call   <stack_pop@plt>
  xor    %eax,%eax
  movsd  %xmm0,0x8(%rsp)
  call   <stack_pop@plt>
  subsd  0x8(%rsp),%xmm0
  call   <stack_push@plt>
  jmp    L214
  nopw   0x0(%rax,%rax,1)
L104:
  lea    D116(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L220
  call   <stack_pop@plt>
  xor    %eax,%eax
  movsd  %xmm0,0x8(%rsp)
  call   <stack_pop@plt>
  mulsd  0x8(%rsp),%xmm0
  call   <stack_push@plt>
  jmp    L214
  xchg   %ax,%ax
L220:
  lea    D9(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L42
  lea    D106(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L136
  call   <stack_pop@plt>
  call   <sin@plt>
  call   <stack_push@plt>
  jmp    L214
  nopl   0x0(%rax)
L42:
  call   <stack_pop@plt>
  xor    %eax,%eax
  movsd  %xmm0,0x8(%rsp)
  call   <stack_pop@plt>
  divsd  0x8(%rsp),%xmm0
  call   <stack_push@plt>
  jmp    L214
  nopw   0x0(%rax,%rax,1)
L87:
  mov    %rbp,%rsi
  lea    D90(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    $0x1,%edi
  call   <exit@plt>
  jmp    L56
L136:
  lea    D57(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L250
  lea    D48(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L65
  call   <stack_pop@plt>
  xor    %eax,%eax
  movsd  %xmm0,0x8(%rsp)
  call   <stack_pop@plt>
  movsd  0x8(%rsp),%xmm1
  call   <pow@plt>
  call   <stack_push@plt>
  jmp    L214
L250:
  call   <stack_pop@plt>
  call   <cos@plt>
  call   <stack_push@plt>
  jmp    L214
L65:
  lea    D14(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L204
  call   <stack_pop@plt>
  call   <log@plt>
  call   <stack_push@plt>
  jmp    L214
```

tool_calls: name: parse_data
arguments: tag: D4
datatype: string
name: parse_data
arguments: tag: D49
datatype: string
name: parse_data
arguments: tag: D30
datatype: string
name: parse_data
arguments: tag: D27
datatype: string
name: parse_data
arguments: tag: D0
datatype: string
name: parse_data
arguments: tag: D126
datatype: string
name: parse_data
arguments: tag: D116
datatype: string
name: parse_data
arguments: tag: D9
datatype: string
name: parse_data
arguments: tag: D106
datatype: string
name: parse_data
arguments: tag: D90
datatype: string
name: parse_data
arguments: tag: D57
datatype: string
name: parse_data
arguments: tag: D48
datatype: string
name: parse_data
arguments: tag: D14
datatype: string

tool: D4: r

tool: D49: x

tool: D30: +

tool: D27: -

tool: D0: Elements remain in the stack

tool: D126: exp

tool: D116: *

tool: D9: /

tool: D106: sin

tool: D90: Could not open file %s


tool: D57: cos

tool: D48: pow

tool: D14: log

assistant: ```c
double rpn_eval(char *fileName, double x) {
  double a, b, c;
  FILE *fd;
  fd = fopen(fileName, "r");
  if (fd == NULL) {
    printf("Could not open file %s\n", fileName);
    exit(1);
  }
  char *word;
  while (word = nextword(fd)) {
    if (c = atof(word)) {
      stack_push(c);
    } else if (strcmp(word, "x") == 0) {
      stack_push(x);
    } else if (strcmp(word, "+") == 0) {
      a = stack_pop();
      b = stack_pop();
      stack_push(a + b);
    } else if (strcmp(word, "-") == 0) {
      a = stack_pop();
      b = stack_pop();
      stack_push(b - a);
    } else if (strcmp(word, "*") == 0) {
      a = stack_pop();
      b = stack_pop();
      stack_push(a * b);
    } else if (strcmp(word, "/") == 0) {
      a = stack_pop();
      b = stack_pop();
      stack_push(b / a);
    } else if (strcmp(word, "sin") == 0) {
      a = stack_pop();
      stack_push(sin(a));
    } else if (strcmp(word, "cos") == 0) {
      a = stack_pop();
      stack_push(cos(a));
    } else if (strcmp(word, "pow") == 0) {
      a = stack_pop();
      b = stack_pop();
      stack_push(pow(b, a));
    } else if (strcmp(word, "log") == 0) {
      a = stack_pop();
      stack_push(log(a));
    } else if (strcmp(word, "exp") == 0) {
      a = stack_pop();
      stack_push(exp(a));
    }
  }
  if (stack_top() != 1) {
    printf("Elements remain in the stack\n");
    exit(1);
  }
  double result = stack_pop();
  return result;
}
```