user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<rk4>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  add    $0xffffffffffffff80,%rsp
  mov    %rdi,-0x48(%rbp)
  mov    %rsi,-0x50(%rbp)
  mov    %edx,-0x54(%rbp)
  movsd  %xmm0,-0x60(%rbp)
  movsd  %xmm1,-0x68(%rbp)
  mov    %rcx,-0x70(%rbp)
  mov    %r8,-0x78(%rbp)
  lea    D26(%rip),%rax
  mov    %rax,-0x38(%rbp)
  mov    -0x54(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rcx
  mov    -0x38(%rbp),%rax
  lea    D33(%rip),%rdx
  mov    %rax,%rsi
  mov    %rcx,%rdi
  mov    $0x0,%eax
  call   <mem_alloc@plt>
  cltq
  mov    %rax,-0x30(%rbp)
  mov    -0x54(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rcx
  mov    -0x38(%rbp),%rax
  lea    D52(%rip),%rdx
  mov    %rax,%rsi
  mov    %rcx,%rdi
  mov    $0x0,%eax
  call   <mem_alloc@plt>
  cltq
  mov    %rax,-0x28(%rbp)
  mov    -0x54(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rcx
  mov    -0x38(%rbp),%rax
  lea    D31(%rip),%rdx
  mov    %rax,%rsi
  mov    %rcx,%rdi
  mov    $0x0,%eax
  call   <mem_alloc@plt>
  cltq
  mov    %rax,-0x20(%rbp)
  movsd  -0x68(%rbp),%xmm1
  movsd  D12(%rip),%xmm0
  mulsd  %xmm1,%xmm0
  movsd  %xmm0,-0x18(%rbp)
  movsd  -0x68(%rbp),%xmm0
  movsd  D11(%rip),%xmm1
  divsd  %xmm1,%xmm0
  movsd  %xmm0,-0x10(%rbp)
  movsd  -0x60(%rbp),%xmm0
  addsd  -0x18(%rbp),%xmm0
  movsd  %xmm0,-0x8(%rbp)
  movl   $0x0,-0x3c(%rbp)
  jmp    L32
L8:
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm1
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mulsd  -0x18(%rbp),%xmm0
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  addsd  %xmm1,%xmm0
  movsd  %xmm0,(%rax)
  addl   $0x1,-0x3c(%rbp)
L32:
  mov    -0x3c(%rbp),%eax
  cmp    -0x54(%rbp),%eax
  jl     L8
  mov    -0x28(%rbp),%rcx
  mov    -0x20(%rbp),%rdx
  mov    -0x8(%rbp),%rax
  mov    -0x78(%rbp),%r8
  mov    %rcx,%rsi
  mov    %rdx,%rdi
  movq   %rax,%xmm0
  call   *%r8
  movl   $0x1,-0x3c(%rbp)
  jmp    L5
L48:
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm1
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mulsd  -0x18(%rbp),%xmm0
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  addsd  %xmm1,%xmm0
  movsd  %xmm0,(%rax)
  addl   $0x1,-0x3c(%rbp)
L5:
  mov    -0x3c(%rbp),%eax
  cmp    -0x54(%rbp),%eax
  jl     L48
  mov    -0x30(%rbp),%rcx
  mov    -0x20(%rbp),%rdx
  mov    -0x8(%rbp),%rax
  mov    -0x78(%rbp),%r8
  mov    %rcx,%rsi
  mov    %rdx,%rdi
  movq   %rax,%xmm0
  call   *%r8
  movl   $0x1,-0x3c(%rbp)
  jmp    L76
L54:
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm1
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mulsd  -0x68(%rbp),%xmm0
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  addsd  %xmm1,%xmm0
  movsd  %xmm0,(%rax)
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm1
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  addsd  %xmm1,%xmm0
  movsd  %xmm0,(%rax)
  addl   $0x1,-0x3c(%rbp)
L76:
  mov    -0x3c(%rbp),%eax
  cmp    -0x54(%rbp),%eax
  jl     L54
  movsd  -0x60(%rbp),%xmm0
  addsd  -0x68(%rbp),%xmm0
  movq   %xmm0,%rax
  mov    -0x28(%rbp),%rcx
  mov    -0x20(%rbp),%rdx
  mov    -0x78(%rbp),%r8
  mov    %rcx,%rsi
  mov    %rdx,%rdi
  movq   %rax,%xmm0
  call   *%r8
  movl   $0x0,-0x3c(%rbp)
  jmp    L20
L55:
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm1
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm2
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  addsd  %xmm0,%xmm2
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  addsd  %xmm0,%xmm0
  addsd  %xmm2,%xmm0
  mulsd  -0x10(%rbp),%xmm0
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x70(%rbp),%rax
  add    %rdx,%rax
  addsd  %xmm1,%xmm0
  movsd  %xmm0,(%rax)
  addl   $0x1,-0x3c(%rbp)
L20:
  mov    -0x3c(%rbp),%eax
  cmp    -0x54(%rbp),%eax
  jl     L55
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x28(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x30(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  nop
  leave
  ret
```

tool_calls: name: read_data
arguments: tag: D26
data_type: string
name: read_data
arguments: tag: D33
data_type: string
name: read_data
arguments: tag: D52
data_type: string
name: read_data
arguments: tag: D31
data_type: string
name: read_data
arguments: tag: D12
data_type: f64
name: read_data
arguments: tag: D11
data_type: f64

tool: D26: rk4(): 

tool: D33: dym[]

tool: D52: dyt[]

tool: D31: yt[]

tool: D12: 0.5

tool: D11: 6

assistant: ```c
void rk4(double *y, double *dydx, int n, double x, double h, double *yout, void (*derivs)(double, double *, double *)) {
  char *func = {"rk4(): "};
  int i;
  double xh, hh, h6, *dym, *dyt, *yt;
  dym = (double *)mem_alloc((n) * sizeof(double), func, "dym[]");
  dyt = (double *)mem_alloc((n) * sizeof(double), func, "dyt[]");
  yt = (double *)mem_alloc((n) * sizeof(double), func, "yt[]");
  hh = h * 0.5;
  h6 = h / 6.0;
  xh = x + hh;
  for (i = 0; i < n; i++) {
    yt[i] = y[i] + hh * dydx[i];
  }
  (*derivs)(xh, yt, dyt);
  for (i = 1; i < n; i++) {
    yt[i] = y[i] + hh * dyt[i];
  }
  (*derivs)(xh, yt, dym);
  for (i = 1; i < n; i++) {
    yt[i] = y[i] + h * dym[i];
    dym[i] += dyt[i];
  }
  (*derivs)(x + h, yt, dyt);
  for (i = 0; i < n; i++) {
    yout[i] = y[i] + h6 * (dydx[i] + dyt[i] + 2.0 * dym[i]);
  }
  free(yt);
  free(dyt);
  free(dym);
}
```