user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<WebRtc_rdft>:
  endbr64
  push   %r15
  push   %r14
  mov    %esi,%r14d
  push   %r13
  mov    %r8,%r13
  push   %r12
  mov    %rdi,%r12
  push   %rbp
  mov    %rdx,%rbp
  push   %rbx
  mov    %rcx,%rbx
  sub    $0x18,%rsp
  mov    (%rcx),%r15
  lea    0x0(,%r15,4),%rax
  cmp    %rdi,%rax
  jb     L103
L12:
  mov    0x8(%rbx),%r8
  lea    0x0(,%r8,4),%rax
  cmp    %r12,%rax
  jb     L53
L14:
  test   %r14d,%r14d
  js     L32
  cmp    $0x4,%r12
  ja     L33
  je     L46
L106:
  movss  0x0(%rbp),%xmm0
  movss  0x4(%rbp),%xmm1
  movaps %xmm0,%xmm2
  subss  %xmm1,%xmm0
  addss  %xmm1,%xmm2
  movss  %xmm0,0x4(%rbp)
  movss  %xmm2,0x0(%rbp)
L85:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L32:
  movss  0x0(%rbp),%xmm0
  movaps %xmm0,%xmm1
  subss  0x4(%rbp),%xmm1
  mulss  D1(%rip),%xmm1
  subss  %xmm1,%xmm0
  movss  %xmm1,0x4(%rbp)
  movss  %xmm0,0x0(%rbp)
  cmp    $0x4,%r12
  ja     L35
  jne    L85
  add    $0x18,%rsp
  mov    %r13,%rdx
  mov    %rbp,%rsi
  mov    $0x4,%edi
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    10f0 <cftfsub@plt>
  nopl   (%rax)
L53:
  mov    %r12,%r8
  lea    0x0(%r13,%r15,4),%rdx
  mov    %rbx,%rsi
  shr    $0x2,%r8
  mov    %r8,%rdi
  mov    %r8,0x8(%rsp)
  call   <makect@plt>
  mov    0x8(%rsp),%r8
  jmp    L14
  cs nopw 0x0(%rax,%rax,1)
L103:
  mov    %rdi,%r15
  mov    %r8,%rdx
  mov    %rcx,%rsi
  shr    $0x2,%r15
  mov    %r15,%rdi
  call   <makewt@plt>
  jmp    L12
  nopw   0x0(%rax,%rax,1)
L33:
  lea    0x10(%rbx),%rsi
  mov    %rbp,%rdx
  mov    %r12,%rdi
  mov    %r8,0x8(%rsp)
  call   <bitrv2@plt>
  mov    %r13,%rdx
  mov    %rbp,%rsi
  mov    %r12,%rdi
  call   <cftfsub@plt>
  mov    0x8(%rsp),%rdx
  mov    %rbp,%rsi
  mov    %r12,%rdi
  lea    0x0(%r13,%r15,4),%rcx
  call   <rftfsub@plt>
  jmp    L106
  nopl   0x0(%rax)
L35:
  lea    0x0(%r13,%r15,4),%rcx
  mov    %r8,%rdx
  mov    %rbp,%rsi
  mov    %r12,%rdi
  call   <rftbsub@plt>
  lea    0x10(%rbx),%rsi
  mov    %rbp,%rdx
  mov    %r12,%rdi
  call   <bitrv2@plt>
  add    $0x18,%rsp
  mov    %r13,%rdx
  mov    %rbp,%rsi
  pop    %rbx
  mov    %r12,%rdi
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    10d0 <cftbsub@plt>
  xchg   %ax,%ax
L46:
  mov    %r13,%rdx
  mov    %rbp,%rsi
  mov    $0x4,%edi
  call   <cftfsub@plt>
  jmp    L106
```

tool_calls: name: extract_symbolic_data
arguments: data_tag: D1
type: byte[4]

tool: {"D1": [0x00,0x00,0x00,0x3f]}

assistant: ```c
void WebRtc_rdft(size_t n, int isgn, float *a, size_t *ip, float *w) {
  size_t nw, nc;
  float xi;
  nw = ip[0];
  if (n > (nw << 2)) {
    nw = n >> 2;
    makewt(nw, ip, w);
  }
  nc = ip[1];
  if (n > (nc << 2)) {
    nc = n >> 2;
    makect(nc, ip, w + nw);
  }
  if (isgn >= 0) {
    if (n > 4) {
      bitrv2(n, ip + 2, a);
      cftfsub(n, a, w);
      rftfsub(n, a, nc, w + nw);
    } else if (n == 4) {
      cftfsub(n, a, w);
    }
    xi = a[0] - a[1];
    a[0] += a[1];
    a[1] = xi;
  } else {
    a[1] = 0.5f * (a[0] - a[1]);
    a[0] -= a[1];
    if (n > 4) {
      rftbsub(n, a, nc, w + nw);
      bitrv2(n, ip + 2, a);
      cftbsub(n, a, w);
    } else if (n == 4) {
      cftfsub(n, a, w);
    }
  }
}
```