user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<rbitrev>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  lea    -0x40000(%rsp),%r11
L20:
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  cmp    %r11,%rsp
  jne    L20
  sub    $0x758,%rsp
  xor    %r11d,%r11d
  mov    %fs:0x28,%rax
  mov    %rax,0x40748(%rsp)
  xor    %eax,%eax
  mov    %esi,%ecx
  mov    %rdi,%r8
  mov    $0x1,%edi
  shr    $0x1f,%ecx
  add    %esi,%ecx
  sar    %ecx
  lea    (%rcx,%rcx,1),%eax
  shl    %cl,%edi
  cmp    %esi,%eax
  mov    D7(%rip),%rax
  setne  %r11b
  add    %ecx,%r11d
  mov    %rax,0x4(%rsp)
  cmp    $0x1,%r11d
  jle    L25
  movdqa D15(%rip),%xmm1
  add    $0x1,%r11d
  mov    $0x1,%esi
  movq   D15(%rip),%xmm2
  mov    $0x2,%r9d
  lea    0x4(%rsp),%rbx
  lea    0x8(%rsp),%r12
  mov    %rsp,%r10
  lea    0x14(%rsp),%rbp
  nopw   0x0(%rax,%rax,1)
L72:
  movslq %esi,%r14
  add    %esi,%esi
  lea    -0x1(%rsi),%eax
  cmp    $0x2,%eax
  jbe    L137
  mov    %esi,%r13d
  mov    %rbx,%rax
  lea    0x4(%r10,%r14,8),%rdx
  shr    $0x2,%r13d
  sub    $0x1,%r13d
  shl    $0x4,%r13
  add    %rbp,%r13
  nopl   0x0(%rax,%rax,1)
L51:
  movdqu (%rax),%xmm0
  add    $0x10,%rax
  add    $0x10,%rdx
  pslld  $0x1,%xmm0
  movups %xmm0,-0x10(%rax)
  paddd  %xmm1,%xmm0
  movups %xmm0,-0x10(%rdx)
  cmp    %r13,%rax
  jne    L51
  mov    %esi,%eax
  and    $0xfffffffc,%eax
  lea    0x1(%rax),%edx
  cmp    %esi,%eax
  je     L79
  mov    %esi,%r13d
  sub    %eax,%r13d
  cmp    $0x1,%r13d
  je     L38
  lea    0x4(%r10,%rax,4),%r15
  lea    0x1(%rax,%r14,2),%rax
  movq   (%r15),%xmm0
  pslld  $0x1,%xmm0
  movq   %xmm0,(%r15)
  paddd  %xmm2,%xmm0
  movq   %xmm0,(%rsp,%rax,4)
  mov    %r13d,%eax
  and    $0xfffffffe,%eax
  add    %eax,%edx
  cmp    %eax,%r13d
  je     L79
L38:
  movslq %edx,%r13
  add    %esi,%edx
  mov    (%rsp,%r13,4),%eax
  movslq %edx,%rdx
  add    %eax,%eax
  mov    %eax,(%rsp,%r13,4)
  add    $0x1,%eax
  mov    %eax,(%rsp,%rdx,4)
L79:
  add    $0x1,%r9d
  cmp    %r11d,%r9d
  jne    L72
L25:
  cmp    $0x1,%edi
  jle    L3
  lea    0x1(%rdi),%ebp
  movslq %edi,%rdi
  lea    0x10(%r8),%r11
  mov    $0x2,%r10d
  lea    0x0(,%rdi,8),%r9
  mov    %rsp,%rbx
  lea    0xc(%rsp),%r12
  nopw   0x0(%rax,%rax,1)
L142:
  mov    (%rbx,%r10,4),%eax
  mov    %eax,%edi
  shl    %cl,%edi
  add    $0x1,%edi
  test   %eax,%eax
  jle    L148
  sub    $0x1,%eax
  lea    0x8(%rsp),%rsi
  mov    %r11,%rdx
  lea    (%r12,%rax,4),%r13
  mov    %edi,%eax
L106:
  cltq
  movsd  (%rdx),%xmm0
  add    $0x4,%rsi
  lea    (%r8,%rax,8),%rax
  movsd  (%rax),%xmm1
  movsd  %xmm1,(%rdx)
  add    %r9,%rdx
  movsd  %xmm0,(%rax)
  mov    -0x4(%rsi),%eax
  add    %edi,%eax
  cmp    %r13,%rsi
  jne    L106
L148:
  add    $0x1,%r10
  add    $0x8,%r11
  cmp    %r10,%rbp
  jne    L142
L3:
  mov    0x40748(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L0
  add    $0x40758,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L137:
  mov    %rbx,%rdx
  lea    (%r12,%rax,4),%r14
  movslq %esi,%r13
  nopw   0x0(%rax,%rax,1)
L31:
  mov    (%rdx),%eax
  add    %eax,%eax
  mov    %eax,(%rdx)
  add    $0x1,%eax
  mov    %eax,(%rdx,%r13,4)
  add    $0x4,%rdx
  cmp    %r14,%rdx
  jne    L31
  jmp    L79
L0:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: label: D7
data_type: byte[8]
name: retrieve_data
arguments: label: D15
data_type: byte[16]

tool: {"D7": [0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00]}

tool: {"D15": [0x01,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x00,0x00,0x00]}

assistant: ```c
void rbitrev(x, m) double *x;
int m;
{
  int itab[66000];
  int m2, nbit, imax, lbss, i, j, k, l, j0;
  double t1;
  m2 = m / 2;
  nbit = 1 << m2;
  if (2 * m2 != m)
    m2 = m2 + 1;
  itab[1] = 0;
  itab[2] = 1;
  imax = 1;
  for (lbss = 2; lbss <= m2; lbss++) {
    imax = 2 * imax;
    for (i = 1; i <= imax; i++) {
      itab[i] = 2 * itab[i];
      itab[i + imax] = 1 + itab[i];
    }
  }
  for (k = 2; k <= nbit; k++) {
    j0 = nbit * itab[k] + 1;
    i = k;
    j = j0;
    for (l = 2; l <= itab[k] + 1; l++) {
      t1 = x[i];
      x[i] = x[j];
      x[j] = t1;
      i = i + nbit;
      j = j0 + itab[l];
    }
  }
  return;
}
```