user: 请将以下的汇编代码转换成C语言代码：

```asm
<calc_mean_and_covariance2>:
  endbr64
  push   %rbx
  mov    %rcx,%r11
  test   %edx,%edx
  jle    L95
  mov    %edx,%eax
  pxor   %xmm4,%xmm4
  mov    %rsi,%rdx
  mov    %rdi,%r9
  lea    -0x1(%rax),%r10d
  xorps  %xmm8,%xmm8
  movaps %xmm4,%xmm3
  lea    (%r10,%r10,4),%rcx
  movaps %xmm4,%xmm2
  lea    (%r10,%rcx,4),%rcx
  lea    0x54(%rdi,%rcx,4),%rbx
  mov    %eax,%ecx
  nopl   0x0(%rax)
L90:
  xor    %eax,%eax
  nopw   0x0(%rax,%rax,1)
L132:
  movss  (%rdx,%rax,8),%xmm0
  ucomiss D38(%rip),%xmm0
  jp     L27
  je     L75
L27:
  movss  0x4(%rdx,%rax,8),%xmm1
  ucomiss D38(%rip),%xmm1
  movaps %xmm0,%xmm7
  unpcklps %xmm1,%xmm7
  jp     L133
  je     L75
L133:
  movss  (%r9,%rax,4),%xmm5
  mulss  %xmm5,%xmm0
  movaps %xmm5,%xmm6
  addss  %xmm5,%xmm4
  mulss  %xmm5,%xmm1
  shufps $0xe0,%xmm6,%xmm6
  mulps  %xmm7,%xmm6
  addss  %xmm0,%xmm2
  addss  %xmm1,%xmm3
  addps  %xmm6,%xmm8
L75:
  add    $0x1,%rax
  cmp    %rcx,%rax
  jne    L132
  add    $0x54,%r9
  add    $0xa8,%rdx
  cmp    %rbx,%r9
  jne    L90
  pxor   %xmm5,%xmm5
  pxor   %xmm0,%xmm0
  movlps %xmm8,(%r11)
  add    $0x4,%rsi
  lea    0x0(,%r10,4),%rax
  movups %xmm0,(%r8)
  movaps %xmm5,%xmm6
  movaps %xmm5,%xmm7
  lea    (%rax,%r10,1),%rdx
  lea    0x4(%rdi,%rax,1),%rcx
  lea    (%r10,%rdx,2),%rdx
  lea    0x58(%rdi,%rdx,8),%r9
  mov    $0xfffffffffffffffc,%rdi
  sub    %rax,%rdi
  xchg   %ax,%ax
L51:
  lea    (%rdi,%rcx,1),%rdx
  mov    %rsi,%rax
  nopw   0x0(%rax,%rax,1)
L128:
  movss  -0x4(%rax),%xmm0
  ucomiss D38(%rip),%xmm0
  jp     L134
  je     L3
L134:
  movss  (%rax),%xmm1
  ucomiss D38(%rip),%xmm1
  jp     L6
  je     L3
L6:
  subss  %xmm2,%xmm0
  subss  %xmm3,%xmm1
  mulss  %xmm0,%xmm0
  mulss  (%rdx),%xmm0
  mulss  %xmm1,%xmm1
  addss  %xmm0,%xmm7
  movss  %xmm7,(%r8)
  mulss  (%rdx),%xmm1
  addss  %xmm1,%xmm6
  movss  %xmm6,0xc(%r8)
  movss  -0x4(%rax),%xmm0
  movss  (%rax),%xmm1
  subss  %xmm2,%xmm0
  subss  %xmm3,%xmm1
  mulss  %xmm1,%xmm0
  mulss  (%rdx),%xmm0
  addss  %xmm0,%xmm5
  movss  %xmm5,0x4(%r8)
L3:
  add    $0x4,%rdx
  add    $0x8,%rax
  cmp    %rdx,%rcx
  jne    L128
  add    $0x54,%rcx
  add    $0xa8,%rsi
  cmp    %r9,%rcx
  jne    L51
L28:
  divss  %xmm4,%xmm5
  pop    %rbx
  divss  %xmm4,%xmm7
  movss  %xmm5,0x4(%r8)
  movss  %xmm5,0x8(%r8)
  divss  %xmm4,%xmm6
  movss  %xmm7,(%r8)
  movss  %xmm6,0xc(%r8)
  ret
L95:
  pxor   %xmm6,%xmm6
  pxor   %xmm0,%xmm0
  movq   $0x0,(%rcx)
  movaps %xmm6,%xmm5
  movups %xmm0,(%r8)
  movaps %xmm6,%xmm7
  movaps %xmm6,%xmm4
  jmp    L28
```

tool_calls: name: retrieve_data
arguments: tag: D38
datatype: f32

tool: D38: 100

assistant: ```c
void calc_mean_and_covariance2(float weights[21][21], float velocities[21][21][2], int weighted_size, float mean[2], float covariance[2][2]) {
  int i, j, k, Q, fdr, a, b;
  float vx, vy, w_sum;
  w_sum = vx = vy = 0.0;
  for (i = 0; i < weighted_size; i++)
    for (j = 0; j < weighted_size; j++) {
      if (velocities[i][j][0] != 100.0 && velocities[i][j][1] != 100.0) {
        w_sum += weights[i][j];
        vx += weights[i][j] * velocities[i][j][0];
        vy += weights[i][j] * velocities[i][j][1];
      }
    }
  mean[0] = vx;
  mean[1] = vy;
  for (i = 0; i < 2; i++)
    for (j = 0; j < 2; j++)
      covariance[i][j] = 0.0;
  for (i = 0; i < weighted_size; i++)
    for (j = 0; j < weighted_size; j++) {
      if (velocities[i][j][0] != 100.0 && velocities[i][j][1] != 100.0) {
        covariance[0][0] += (velocities[i][j][0] - vx) * (velocities[i][j][0] - vx) * weights[i][j];
        covariance[1][1] += (velocities[i][j][1] - vy) * (velocities[i][j][1] - vy) * weights[i][j];
        covariance[0][1] += (velocities[i][j][0] - vx) * (velocities[i][j][1] - vy) * weights[i][j];
      }
    }
  covariance[0][0] /= w_sum;
  covariance[0][1] /= w_sum;
  covariance[1][1] /= w_sum;
  covariance[1][0] = covariance[0][1];
}
```