user: 这段汇编代码用C语言表示是什么样的:

```asm
<mp_mul_rcsqu>:
  endbr64
  mov    %rsi,%r8
  movslq %edx,%rsi
  movslq %edi,%r10
  push   %rbx
  lea    0x0(,%rsi,4),%eax
  mov    %r10d,%r11d
  cltd
  sar    %r11d
  idiv   %r10d
  cmp    $0x5,%r10d
  jle    L5
  mov    %eax,%r9d
  lea    -0x3(%r11),%ebx
  cltq
  shl    $0x3,%r10
  neg    %r9d
  shr    %ebx
  sub    %rax,%rsi
  lea    0x0(,%rax,8),%rdi
  movslq %r9d,%r9
  lea    (%r8,%r10,1),%rax
  shl    $0x4,%rbx
  lea    -0x10(%r8,%r10,1),%r10
  lea    (%rcx,%rsi,8),%rsi
  shl    $0x3,%r9
  add    %rdi,%rcx
  sub    %rbx,%r10
  movsd  D6(%rip),%xmm5
  lea    0x10(%r8),%rdx
L16:
  movsd  (%rdx),%xmm2
  movapd %xmm5,%xmm0
  subsd  (%rsi),%xmm0
  sub    $0x10,%rax
  movsd  0x8(%rdx),%xmm6
  movsd  (%rax),%xmm1
  add    %r9,%rsi
  add    $0x10,%rdx
  movsd  0x8(%rax),%xmm9
  movapd %xmm2,%xmm8
  movsd  (%rcx),%xmm4
  add    %rdi,%rcx
  movapd %xmm6,%xmm3
  subsd  %xmm1,%xmm8
  movapd %xmm0,%xmm7
  addsd  %xmm9,%xmm3
  movapd %xmm4,%xmm10
  mulsd  %xmm8,%xmm7
  mulsd  %xmm3,%xmm10
  mulsd  %xmm4,%xmm8
  mulsd  %xmm0,%xmm3
  subsd  %xmm10,%xmm7
  movapd %xmm4,%xmm10
  addsd  %xmm8,%xmm3
  subsd  %xmm7,%xmm2
  addsd  %xmm7,%xmm1
  subsd  %xmm3,%xmm6
  subsd  %xmm3,%xmm9
  movapd %xmm2,%xmm3
  mulsd  %xmm2,%xmm3
  addsd  %xmm2,%xmm2
  movapd %xmm6,%xmm7
  mulsd  %xmm6,%xmm7
  mulsd  %xmm6,%xmm2
  movapd %xmm9,%xmm6
  mulsd  %xmm9,%xmm6
  subsd  %xmm7,%xmm3
  movapd %xmm1,%xmm7
  mulsd  %xmm1,%xmm7
  addsd  %xmm1,%xmm1
  movapd %xmm3,%xmm8
  mulsd  %xmm9,%xmm1
  movapd %xmm2,%xmm9
  subsd  %xmm6,%xmm7
  movapd %xmm0,%xmm6
  addsd  %xmm1,%xmm9
  subsd  %xmm7,%xmm8
  mulsd  %xmm9,%xmm10
  mulsd  %xmm8,%xmm6
  mulsd  %xmm9,%xmm0
  mulsd  %xmm8,%xmm4
  addsd  %xmm10,%xmm6
  subsd  %xmm4,%xmm0
  subsd  %xmm6,%xmm3
  addsd  %xmm7,%xmm6
  subsd  %xmm0,%xmm2
  subsd  %xmm0,%xmm1
  movsd  %xmm3,-0x10(%rdx)
  movsd  %xmm2,-0x8(%rdx)
  movsd  %xmm6,(%rax)
  movsd  %xmm1,0x8(%rax)
  cmp    %rax,%r10
  jne    L16
L5:
  movslq %r11d,%r11
  shl    $0x3,%r11
  lea    (%r8,%r11,1),%rax
  movsd  0x8(%r8,%r11,1),%xmm2
  movsd  (%rax),%xmm0
  movapd %xmm2,%xmm3
  mulsd  %xmm2,%xmm3
  movapd %xmm0,%xmm1
  mulsd  %xmm0,%xmm1
  addsd  %xmm0,%xmm0
  mulsd  %xmm2,%xmm0
  subsd  %xmm3,%xmm1
  unpcklpd %xmm0,%xmm1
  movups %xmm1,(%rax)
  pop    %rbx
  ret
```

tool_calls: name: parse_data
arguments: tag: D6
datatype: f64

tool: D6: 0.5

assistant: ```c
void mp_mul_rcsqu(int n, double *a, int nc, double *c) {
  int j, k, kk, ks, m;
  double wkr, wki, xr, xi, yr, yi, ajr, aji, akr, aki;
  ks = (nc << 2) / n;
  kk = 0;
  m = n >> 1;
  for (j = 2; j < m; j += 2) {
    k = n - j;
    kk += ks;
    wkr = ((double)0.5) - c[nc - kk];
    wki = c[kk];
    xr = a[j] - a[k];
    xi = a[j + 1] + a[k + 1];
    yr = wkr * xr - wki * xi;
    yi = wkr * xi + wki * xr;
    xr = a[j] - yr;
    xi = a[j + 1] - yi;
    yr = a[k] + yr;
    yi = a[k + 1] - yi;
    ajr = xr * xr - xi * xi;
    aji = 2 * xr * xi;
    akr = yr * yr - yi * yi;
    aki = 2 * yr * yi;
    xr = ajr - akr;
    xi = aji + aki;
    yr = wkr * xr + wki * xi;
    yi = wkr * xi - wki * xr;
    a[j] = ajr - yr;
    a[j + 1] = aji - yi;
    a[k] = akr + yr;
    a[k + 1] = aki - yi;
  }
  xr = a[m];
  xi = a[m + 1];
  a[m] = xr * xr - xi * xi;
  a[m + 1] = 2 * xr * xi;
}
```