user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<rk4>:
  endbr64
  push   %r15
  xor    %eax,%eax
  mov    %rsi,%r15
  lea    D55(%rip),%rsi
  push   %r14
  push   %r13
  push   %r12
  movslq %edx,%r12
  lea    D50(%rip),%rdx
  push   %rbp
  mov    %r12,%r14
  shl    $0x3,%r12
  push   %rbx
  mov    %rdi,%rbx
  mov    %r12,%rdi
  sub    $0x78,%rsp
  mov    %rcx,0x10(%rsp)
  movsd  %xmm1,0x20(%rsp)
  mov    %r8,0x8(%rsp)
  movsd  %xmm0,0x18(%rsp)
  call   <mem_alloc@plt>
  mov    %r12,%rdi
  lea    D65(%rip),%rdx
  lea    D55(%rip),%rsi
  movslq %eax,%r13
  xor    %eax,%eax
  call   <mem_alloc@plt>
  mov    %r12,%rdi
  lea    D61(%rip),%rdx
  lea    D55(%rip),%rsi
  movslq %eax,%rbp
  xor    %eax,%eax
  call   <mem_alloc@plt>
  movsd  0x20(%rsp),%xmm1
  test   %r14d,%r14d
  mov    0x10(%rsp),%rcx
  movsd  D25(%rip),%xmm2
  movsd  0x18(%rsp),%xmm4
  movslq %eax,%r12
  movapd %xmm1,%xmm3
  divsd  D9(%rip),%xmm3
  mulsd  %xmm1,%xmm2
  addsd  %xmm2,%xmm4
  jle    L144
  lea    0x8(%rbx),%rdi
  mov    %r12,%rax
  cmp    %rdi,%r12
  mov    %rdi,0x20(%rsp)
  lea    0x8(%r15),%rdi
  setne  %sil
  cmp    %rdi,%r12
  mov    %rdi,0x28(%rsp)
  setne  %dl
  test   %dl,%sil
  je     L227
  lea    -0x1(%r14),%edx
  cmp    $0x1,%edx
  jbe    L227
  mov    %r14d,%edx
  movapd %xmm2,%xmm5
  mov    %r15,%rdi
  mov    %rbx,%rsi
  shr    %edx
  unpcklpd %xmm5,%xmm5
  sub    %r12,%rdi
  sub    %r12,%rsi
  shl    $0x4,%rdx
  add    %r12,%rdx
  nopw   0x0(%rax,%rax,1)
L149:
  movupd (%rdi,%rax,1),%xmm0
  movupd (%rsi,%rax,1),%xmm6
  add    $0x10,%rax
  mulpd  %xmm5,%xmm0
  addpd  %xmm6,%xmm0
  movups %xmm0,-0x10(%rax)
  cmp    %rdx,%rax
  jne    L149
  mov    %r14d,%eax
  and    $0xfffffffe,%eax
  test   $0x1,%r14b
  je     L276
  movsd  (%r15,%rax,8),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  (%rbx,%rax,8),%xmm0
  movsd  %xmm0,(%r12,%rax,8)
L276:
  mov    %rcx,0x48(%rsp)
  movapd %xmm4,%xmm0
  mov    %rbp,%rsi
  mov    %r12,%rdi
  movsd  %xmm1,0x40(%rsp)
  mov    0x8(%rsp),%rax
  movsd  %xmm3,0x38(%rsp)
  movsd  %xmm2,0x30(%rsp)
  movsd  %xmm4,0x10(%rsp)
  call   *%rax
  movsd  0x10(%rsp),%xmm4
  movsd  0x30(%rsp),%xmm2
  movsd  0x38(%rsp),%xmm3
  movsd  0x40(%rsp),%xmm1
  mov    0x48(%rsp),%rcx
L138:
  lea    0x8(%r12),%r8
  lea    0x10(%rbx),%r9
  cmp    %r9,%r8
  lea    0x10(%rbp),%r10
  lea    -0x2(%r14),%edi
  setne  0x10(%rsp)
  cmp    %r10,%r8
  movzbl 0x10(%rsp),%esi
  setne  %al
  mov    %edi,0x6c(%rsp)
  test   %al,%sil
  je     L150
  cmp    $0x1,%edi
  jbe    L150
  lea    -0x1(%r14),%r11d
  lea    0x8(%rbp),%rax
  movapd %xmm2,%xmm5
  mov    %rbx,%rsi
  mov    %r11d,%edx
  mov    %rax,0x60(%rsp)
  unpcklpd %xmm5,%xmm5
  sub    %rbp,%rsi
  shr    %edx
  sub    $0x1,%edx
  shl    $0x4,%rdx
  lea    0x18(%rdx,%rbp,1),%rdi
  mov    %r12,%rdx
  sub    %rbp,%rdx
  nopw   0x0(%rax,%rax,1)
L224:
  movupd (%rax),%xmm0
  movupd (%rsi,%rax,1),%xmm7
  mulpd  %xmm5,%xmm0
  addpd  %xmm7,%xmm0
  movups %xmm0,(%rdx,%rax,1)
  add    $0x10,%rax
  cmp    %rax,%rdi
  jne    L224
  mov    %r11d,%eax
  or     $0x1,%eax
  and    $0x1,%r11d
  je     L145
  cltq
  mulsd  0x0(%rbp,%rax,8),%xmm2
  addsd  (%rbx,%rax,8),%xmm2
  movsd  %xmm2,(%r12,%rax,8)
L145:
  mov    %rcx,0x58(%rsp)
  mov    0x8(%rsp),%rax
  mov    %r13,%rsi
  mov    %r12,%rdi
  mov    %r9,0x48(%rsp)
  movapd %xmm4,%xmm0
  mov    %r10,0x40(%rsp)
  mov    %r8,0x38(%rsp)
  movsd  %xmm1,0x50(%rsp)
  movsd  %xmm3,0x30(%rsp)
  call   *%rax
  mov    0x40(%rsp),%r10
  lea    0x8(%r13),%rdx
  mov    0x48(%rsp),%r9
  mov    0x38(%rsp),%r8
  lea    0x18(%r12),%rdi
  mov    0x58(%rsp),%rcx
  mov    %rdx,%rax
  cmp    %r10,%rdx
  movsd  0x30(%rsp),%xmm3
  movsd  0x50(%rsp),%xmm1
  setne  %r10b
  and    0x10(%rsp),%r10b
  cmp    $0x2,%r14d
  setne  %sil
  and    %r10d,%esi
  cmp    %r9,%rdx
  setne  %r10b
  and    %r10d,%esi
  lea    0x18(%r13),%r10
  cmp    %r10,%r8
  setae  %r10b
  cmp    %rdi,%rdx
  setae  %r11b
  or     %r11d,%r10d
  test   %r10b,%sil
  je     L201
  cmp    0x60(%rsp),%rdi
  lea    0x18(%rbp),%rdi
  setbe  %sil
  cmp    %rdi,%r8
  setae  %dil
  or     %sil,%dil
  je     L201
  lea    -0x1(%r14),%r10d
  movapd %xmm1,%xmm2
  mov    %rbx,%rdi
  mov    %r12,%rsi
  mov    %r10d,%edx
  unpcklpd %xmm2,%xmm2
  sub    %r13,%rdi
  sub    %r13,%rsi
  shr    %edx
  sub    $0x1,%edx
  shl    $0x4,%rdx
  lea    0x18(%rdx,%r13,1),%r8
  mov    %rbp,%rdx
  sub    %r13,%rdx
  nopl   (%rax)
L34:
  movupd (%rax),%xmm0
  movupd (%rdi,%rax,1),%xmm6
  mulpd  %xmm2,%xmm0
  addpd  %xmm6,%xmm0
  movups %xmm0,(%rsi,%rax,1)
  movupd (%rdx,%rax,1),%xmm0
  movupd (%rax),%xmm7
  add    $0x10,%rax
  addpd  %xmm7,%xmm0
  movups %xmm0,-0x10(%rax)
  cmp    %rax,%r8
  jne    L34
  mov    %r10d,%eax
  or     $0x1,%eax
  and    $0x1,%r10d
  je     L6
  cltq
  lea    0x0(%r13,%rax,8),%rdx
  movsd  (%rdx),%xmm0
  mulsd  %xmm1,%xmm0
  addsd  (%rbx,%rax,8),%xmm0
  movsd  %xmm0,(%r12,%rax,8)
  movsd  (%rdx),%xmm0
  addsd  0x0(%rbp,%rax,8),%xmm0
  movsd  %xmm0,(%rdx)
L6:
  mov    %rcx,0x30(%rsp)
  mov    0x8(%rsp),%rax
  mov    %rbp,%rsi
  mov    %r12,%rdi
  movsd  0x18(%rsp),%xmm0
  movsd  %xmm3,0x10(%rsp)
  addsd  %xmm1,%xmm0
  call   *%rax
  mov    0x30(%rsp),%rcx
  cmp    0x28(%rsp),%rcx
  mov    %rbp,%rsi
  setne  %al
  cmp    0x20(%rsp),%rcx
  movsd  0x10(%rsp),%xmm3
  setne  %dl
  and    %edx,%eax
  cmp    $0x1,%r14d
  setg   %dl
  and    %edx,%eax
  lea    0x8(%r13),%rdx
  cmp    %rdx,%rcx
  setne  %dl
  test   %dl,%al
  je     L36
  lea    0x8(%rbp),%rdx
  cmp    %rdx,%rcx
  je     L208
  test   %r14d,%r14d
  mov    $0x1,%r8d
  movapd %xmm3,%xmm2
  mov    %r15,%r10
  cmovg  %r14d,%r8d
  mov    %r13,%r9
  mov    %rbx,%rdi
  mov    %rcx,%rsi
  mov    %rbp,%rax
  unpcklpd %xmm2,%xmm2
  sub    %rbp,%r10
  mov    %r8d,%edx
  sub    %rbp,%r9
  sub    %rbp,%rdi
  sub    %rbp,%rsi
  shr    %edx
  shl    $0x4,%rdx
  add    %rbp,%rdx
  nopl   0x0(%rax)
L76:
  movupd (%r10,%rax,1),%xmm0
  movupd (%rax),%xmm5
  movupd (%r9,%rax,1),%xmm1
  movupd (%rdi,%rax,1),%xmm6
  addpd  %xmm5,%xmm0
  addpd  %xmm1,%xmm1
  addpd  %xmm1,%xmm0
  mulpd  %xmm2,%xmm0
  addpd  %xmm6,%xmm0
  movups %xmm0,(%rsi,%rax,1)
  add    $0x10,%rax
  cmp    %rdx,%rax
  jne    L76
  mov    %r8d,%eax
  and    $0xfffffffe,%eax
  and    $0x1,%r8d
  je     L233
  movsd  0x0(%r13,%rax,8),%xmm1
  movsd  0x0(%rbp,%rax,8),%xmm0
  addsd  (%r15,%rax,8),%xmm0
  addsd  %xmm1,%xmm1
  addsd  %xmm1,%xmm0
  mulsd  %xmm3,%xmm0
  addsd  (%rbx,%rax,8),%xmm0
  movsd  %xmm0,(%rcx,%rax,8)
L233:
  mov    %r12,%rdi
  call   <free@plt>
  mov    %rbp,%rdi
  call   <free@plt>
  add    $0x78,%rsp
  mov    %r13,%rdi
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    1060 <free@plt>
  nopl   0x0(%rax)
L227:
  mov    %r14d,%eax
  mov    %r15,%rsi
  mov    %rbx,%rdx
  lea    (%r12,%rax,8),%rdi
  sub    %r12,%rsi
  mov    %r12,%rax
  sub    %r12,%rdx
  cs nopw 0x0(%rax,%rax,1)
L52:
  movsd  (%rsi,%rax,1),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  (%rdx,%rax,1),%xmm0
  add    $0x8,%rax
  movsd  %xmm0,-0x8(%rax)
  cmp    %rax,%rdi
  jne    L52
  mov    %rcx,0x48(%rsp)
  movapd %xmm4,%xmm0
  mov    %rbp,%rsi
  mov    %r12,%rdi
  movsd  %xmm1,0x40(%rsp)
  mov    0x8(%rsp),%rax
  movsd  %xmm3,0x38(%rsp)
  movsd  %xmm2,0x30(%rsp)
  movsd  %xmm4,0x10(%rsp)
  call   *%rax
  cmp    $0x1,%r14d
  movsd  0x10(%rsp),%xmm4
  movsd  0x30(%rsp),%xmm2
  movsd  0x38(%rsp),%xmm3
  movsd  0x40(%rsp),%xmm1
  mov    0x48(%rsp),%rcx
  jg     L138
  jmp    L194
  cs nopw 0x0(%rax,%rax,1)
L150:
  mov    0x6c(%rsp),%edx
  lea    0x8(%rbp),%rax
  mov    %r12,%rsi
  mov    %rax,0x60(%rsp)
  sub    %rbp,%rsi
  lea    0x10(%rbp,%rdx,8),%rdi
  mov    %rbx,%rdx
  sub    %rbp,%rdx
  xchg   %ax,%ax
L47:
  movsd  (%rax),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  (%rdx,%rax,1),%xmm0
  movsd  %xmm0,(%rsi,%rax,1)
  add    $0x8,%rax
  cmp    %rax,%rdi
  jne    L47
  jmp    L145
L201:
  mov    0x6c(%rsp),%eax
  mov    %r12,%rdi
  mov    %rbx,%rsi
  sub    %r13,%rdi
  sub    %r13,%rsi
  lea    0x10(%r13,%rax,8),%r8
  mov    %rbp,%rax
  sub    %r13,%rax
  nopl   0x0(%rax,%rax,1)
L61:
  movsd  (%rdx),%xmm0
  mulsd  %xmm1,%xmm0
  addsd  (%rsi,%rdx,1),%xmm0
  movsd  %xmm0,(%rdi,%rdx,1)
  movsd  (%rdx),%xmm0
  addsd  (%rax,%rdx,1),%xmm0
  add    $0x8,%rdx
  movsd  %xmm0,-0x8(%rdx)
  cmp    %r8,%rdx
  jne    L61
  jmp    L6
  xchg   %ax,%ax
L144:
  mov    %rcx,0x30(%rsp)
  movapd %xmm4,%xmm0
  mov    %rbp,%rsi
  mov    %r12,%rdi
  movsd  %xmm1,0x28(%rsp)
  mov    0x8(%rsp),%rax
  movsd  %xmm3,0x20(%rsp)
  movsd  %xmm4,0x10(%rsp)
  call   *%rax
  movsd  0x10(%rsp),%xmm4
  movsd  0x20(%rsp),%xmm3
  movsd  0x28(%rsp),%xmm1
  mov    0x30(%rsp),%rcx
L194:
  mov    %rcx,0x28(%rsp)
  movapd %xmm4,%xmm0
  mov    %r13,%rsi
  mov    %r12,%rdi
  movsd  %xmm3,0x10(%rsp)
  mov    0x8(%rsp),%rax
  movsd  %xmm1,0x20(%rsp)
  call   *%rax
  movsd  0x18(%rsp),%xmm0
  mov    0x8(%rsp),%rax
  mov    %rbp,%rsi
  movsd  0x20(%rsp),%xmm1
  mov    %r12,%rdi
  addsd  %xmm1,%xmm0
  call   *%rax
  cmp    $0x1,%r14d
  movsd  0x10(%rsp),%xmm3
  mov    0x28(%rsp),%rcx
  jne    L233
  mov    %rbp,%rsi
L36:
  lea    0x8(%rbp),%rdx
L208:
  mov    %r13,%rdi
  xor    %eax,%eax
  sub    %rbp,%rdi
  jmp    L229
  nopl   0x0(%rax)
L60:
  add    $0x8,%rdx
L229:
  movsd  (%rdi,%rsi,1),%xmm0
  movsd  (%rsi),%xmm1
  mov    %rdx,%rsi
  addsd  (%r15,%rax,8),%xmm1
  addsd  %xmm0,%xmm0
  addsd  %xmm1,%xmm0
  mulsd  %xmm3,%xmm0
  addsd  (%rbx,%rax,8),%xmm0
  movsd  %xmm0,(%rcx,%rax,8)
  add    $0x1,%rax
  cmp    %eax,%r14d
  jg     L60
  jmp    L233
```

tool_calls: name: read_data
arguments: label: D55
type: string
name: read_data
arguments: label: D50
type: string
name: read_data
arguments: label: D65
type: string
name: read_data
arguments: label: D61
type: string
name: read_data
arguments: label: D25
type: f64
name: read_data
arguments: label: D9
type: f64

tool: D55: rk4(): 

tool: D50: dym[]

tool: D65: dyt[]

tool: D61: yt[]

tool: D25: 0.5

tool: D9: 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);
}
```