user: 请从给定的汇编指令推导出C源代码:

```asm
<rkStep>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  movslq %edi,%r12
  push   %rbx
  mov    %rsi,%rbx
  mov    %r12,%rcx
  sub    $0x48,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  lea    0xf(,%r12,8),%rax
  mov    %rsp,%rdi
  mov    %rax,%r8
  mov    %rax,%rsi
  and    $0xfffffffffffff000,%r8
  and    $0xfffffffffffffff0,%rsi
  sub    %r8,%rdi
  cmp    %rdi,%rsp
  je     L14
L87:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rdi,%rsp
  jne    L87
L14:
  and    $0xfff,%esi
  sub    %rsi,%rsp
  test   %rsi,%rsi
  jne    L57
L152:
  mov    %rax,%r8
  mov    %rsp,%rdi
  mov    %rax,%rsi
  mov    %rsp,%r15
  and    $0xfffffffffffff000,%r8
  and    $0xfffffffffffffff0,%rsi
  sub    %r8,%rdi
  cmp    %rdi,%rsp
  je     L80
L124:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rdi,%rsp
  jne    L124
L80:
  and    $0xfff,%esi
  sub    %rsi,%rsp
  test   %rsi,%rsi
  jne    L90
L215:
  mov    %rax,%r8
  mov    %rsp,%rdi
  mov    %rax,%rsi
  mov    %rsp,%r13
  and    $0xfffffffffffff000,%r8
  and    $0xfffffffffffffff0,%rsi
  sub    %r8,%rdi
  cmp    %rdi,%rsp
  je     L153
L39:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rdi,%rsp
  jne    L39
L153:
  and    $0xfff,%esi
  sub    %rsi,%rsp
  test   %rsi,%rsi
  je     L189
  orq    $0x0,-0x8(%rsp,%rsi,1)
L189:
  mov    %rax,%r8
  mov    %rsp,%rdi
  mov    %rax,%rsi
  mov    %rsp,%r14
  and    $0xfffffffffffff000,%r8
  and    $0xfffffffffffffff0,%rsi
  sub    %r8,%rdi
  cmp    %rdi,%rsp
  je     L110
L75:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rdi,%rsp
  jne    L75
L110:
  and    $0xfff,%esi
  sub    %rsi,%rsp
  test   %rsi,%rsi
  je     L133
  orq    $0x0,-0x8(%rsp,%rsi,1)
L133:
  mov    %rax,%rsi
  mov    %rsp,%rdi
  and    $0xfffffffffffff000,%rax
  mov    %rsp,%r8
  sub    %rax,%rdi
  and    $0xfffffffffffffff0,%rsi
  cmp    %rdi,%rsp
  je     L178
L129:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rdi,%rsp
  jne    L129
L178:
  mov    %rsi,%rax
  and    $0xfff,%eax
  sub    %rax,%rsp
  test   %rax,%rax
  je     L60
  orq    $0x0,-0x8(%rsp,%rax,1)
L60:
  mov    %rsp,%r9
  mov    %r15,%rsi
  mov    %rbx,%rdi
  mov    %r8,-0x70(%rbp)
  mov    %ecx,-0x68(%rbp)
  mov    %r9,-0x60(%rbp)
  movsd  %xmm0,-0x58(%rbp)
  mov    %rdx,-0x48(%rbp)
  movsd  %xmm1,-0x50(%rbp)
  call   <kepler@plt>
  mov    -0x68(%rbp),%ecx
  movsd  -0x58(%rbp),%xmm0
  mov    -0x60(%rbp),%r9
  mov    -0x70(%rbp),%r8
  test   %ecx,%ecx
  jle    L50
  movsd  -0x50(%rbp),%xmm1
  movsd  D5(%rip),%xmm3
  xor    %eax,%eax
  mov    -0x48(%rbp),%rdx
  mulsd  %xmm1,%xmm3
  nopw   0x0(%rax,%rax,1)
L202:
  movsd  (%r15,%rax,8),%xmm2
  mulsd  %xmm3,%xmm2
  addsd  (%rbx,%rax,8),%xmm2
  movsd  %xmm2,(%r9,%rax,8)
  add    $0x1,%rax
  cmp    %rax,%r12
  jne    L202
  mov    %r9,%rdi
  mov    %r13,%rsi
  mov    %r8,-0x70(%rbp)
  mov    %rdx,-0x60(%rbp)
  mov    %r9,-0x50(%rbp)
  movsd  %xmm1,-0x68(%rbp)
  movsd  %xmm3,-0x58(%rbp)
  movsd  %xmm0,-0x48(%rbp)
  call   <kepler@plt>
  movsd  -0x48(%rbp),%xmm0
  mov    -0x50(%rbp),%r9
  xor    %eax,%eax
  movsd  -0x58(%rbp),%xmm3
  mov    -0x60(%rbp),%rdx
  movsd  -0x68(%rbp),%xmm1
  mov    -0x70(%rbp),%r8
  nopl   0x0(%rax)
L155:
  movsd  0x0(%r13,%rax,8),%xmm2
  mulsd  %xmm3,%xmm2
  addsd  (%rbx,%rax,8),%xmm2
  movsd  %xmm2,(%r9,%rax,8)
  add    $0x1,%rax
  cmp    %rax,%r12
  jne    L155
  mov    %r9,%rdi
  mov    %r14,%rsi
  mov    %r8,-0x68(%rbp)
  mov    %rdx,-0x58(%rbp)
  mov    %r9,-0x50(%rbp)
  movsd  %xmm1,-0x60(%rbp)
  movsd  %xmm0,-0x48(%rbp)
  call   <kepler@plt>
  movsd  -0x48(%rbp),%xmm0
  mov    -0x50(%rbp),%r9
  xor    %eax,%eax
  mov    -0x58(%rbp),%rdx
  movsd  -0x60(%rbp),%xmm1
  mov    -0x68(%rbp),%r8
L8:
  movsd  (%r14,%rax,8),%xmm2
  mulsd  %xmm1,%xmm2
  addsd  (%rbx,%rax,8),%xmm2
  movsd  %xmm2,(%r9,%rax,8)
  add    $0x1,%rax
  cmp    %rax,%r12
  jne    L8
  mov    %r8,%rsi
  mov    %r9,%rdi
  mov    %rdx,-0x50(%rbp)
  mov    %r8,-0x48(%rbp)
  movsd  %xmm1,-0x58(%rbp)
  call   <kepler@plt>
  mov    -0x48(%rbp),%r8
  mov    -0x50(%rbp),%rdx
  xor    %eax,%eax
  movsd  D9(%rip),%xmm2
  movsd  -0x58(%rbp),%xmm1
  nopl   (%rax)
L65:
  movsd  0x0(%r13,%rax,8),%xmm0
  addsd  (%r14,%rax,8),%xmm0
  addsd  %xmm0,%xmm0
  addsd  (%r15,%rax,8),%xmm0
  addsd  (%r8,%rax,8),%xmm0
  mulsd  %xmm1,%xmm0
  divsd  %xmm2,%xmm0
  addsd  (%rbx,%rax,8),%xmm0
  movsd  %xmm0,(%rdx,%rax,8)
  add    $0x1,%rax
  cmp    %rax,%r12
  jne    L65
L94:
  mov    -0x38(%rbp),%rax
  sub    %fs:0x28,%rax
  jne    L181
  lea    -0x28(%rbp),%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
  nopl   0x0(%rax,%rax,1)
L57:
  orq    $0x0,-0x8(%rsp,%rsi,1)
  jmp    L152
L90:
  orq    $0x0,-0x8(%rsp,%rsi,1)
  jmp    L215
L50:
  mov    %r9,%rdi
  mov    %r13,%rsi
  mov    %r8,-0x58(%rbp)
  mov    %r9,-0x50(%rbp)
  movsd  %xmm0,-0x48(%rbp)
  call   <kepler@plt>
  mov    -0x50(%rbp),%rdi
  movsd  -0x48(%rbp),%xmm0
  mov    %r14,%rsi
  call   <kepler@plt>
  mov    -0x58(%rbp),%rsi
  mov    -0x50(%rbp),%rdi
  movsd  -0x48(%rbp),%xmm0
  call   <kepler@plt>
  jmp    L94
L181:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: label: D5
data_type: f64
name: read_data
arguments: label: D9
data_type: f64

tool: D5: 0.5

tool: D9: 6

assistant: ```c
int rkStep(int neqn, double *y, double *yp, double t, double dt) {
  double k1[neqn], k2[neqn], k3[neqn], k4[neqn], yt[neqn];
  int i;
  kepler(t, y, k1);
  for (i = 0; i < neqn; i++) {
    yt[i] = y[i] + 0.5 * dt * k1[i];
  }
  kepler(t, yt, k2);
  for (i = 0; i < neqn; i++) {
    yt[i] = y[i] + 0.5 * dt * k2[i];
  }
  kepler(t, yt, k3);
  for (i = 0; i < neqn; i++) {
    yt[i] = y[i] + dt * k3[i];
  }
  kepler(t, yt, k4);
  for (i = 0; i < neqn; i++) {
    yp[i] = y[i] + dt * (k1[i] + 2.0 * (k2[i] + k3[i]) + k4[i]) / 6.0;
  }
  return 0;
}
```