user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<s_update_var_mpc>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    %edi,-0x28(%rsp)
  mov    %esi,-0x2c(%rsp)
  mov    %edx,-0x10(%rsp)
  mov    %ecx,-0xc(%rsp)
  mov    %r9,-0x8(%rsp)
  movaps %xmm0,%xmm2
  test   %esi,%esi
  jle    L34
  mov    %esi,%esi
  shl    $0x2,%rsi
  mov    $0x0,%eax
  mov    0x38(%rsp),%rdi
  mov    0x40(%rsp),%r9
L35:
  mov    %rax,%rdx
  add    (%rdi),%rdx
  movss  (%rdx),%xmm3
  mov    (%r9),%rcx
  movss  (%rcx,%rax,1),%xmm0
  subss  %xmm3,%xmm0
  mulss  %xmm1,%xmm0
  addss  %xmm3,%xmm0
  movss  %xmm0,(%rdx)
  add    $0x4,%rax
  cmp    %rsi,%rax
  jne    L35
L34:
  add    %r8d,%r8d
  test   %r8d,%r8d
  jle    L134
  sub    $0x1,%r8d
  shr    %r8d
  lea    0x1(%r8),%esi
  shl    $0x3,%rsi
  mov    $0x0,%eax
  pxor   %xmm3,%xmm3
  mov    0x48(%rsp),%rcx
  mov    0x50(%rsp),%r8
  mov    0x58(%rsp),%rdi
  mov    0x60(%rsp),%r9
L58:
  mov    %rax,%rdx
  add    (%rdi),%rdx
  mov    (%r9),%r10
  movaps %xmm1,%xmm0
  mulss  (%r10,%rax,1),%xmm0
  addss  (%rdx),%xmm0
  movss  %xmm0,(%rdx)
  lea    0x4(%rax),%rdx
  mov    %rdx,%r10
  add    (%rdi),%r10
  mov    (%r9),%r11
  movaps %xmm1,%xmm0
  mulss  0x4(%r11,%rax,1),%xmm0
  addss  (%r10),%xmm0
  movss  %xmm0,(%r10)
  mov    %rax,%r10
  add    (%rcx),%r10
  mov    (%r8),%r11
  movaps %xmm1,%xmm0
  mulss  (%r11,%rax,1),%xmm0
  addss  (%r10),%xmm0
  movss  %xmm0,(%r10)
  add    (%rcx),%rdx
  mov    (%r8),%r10
  movaps %xmm1,%xmm0
  mulss  0x4(%r10,%rax,1),%xmm0
  addss  (%rdx),%xmm0
  movss  %xmm0,(%rdx)
  mov    (%rdi),%r10
  mov    (%rcx),%rdx
  movss  (%r10,%rax,1),%xmm0
  mulss  (%rdx,%rax,1),%xmm0
  movss  0x4(%r10,%rax,1),%xmm4
  mulss  0x4(%rdx,%rax,1),%xmm4
  addss  %xmm4,%xmm0
  addss  %xmm0,%xmm3
  add    $0x8,%rax
  cmp    %rsi,%rax
  jne    L58
L160:
  mov    -0x10(%rsp),%eax
  cmp    $0x1,%eax
  jle    L94
  mov    -0xc(%rsp),%ebx
  lea    (%rbx,%rbx,1),%edi
  mov    %edi,-0x24(%rsp)
  mov    0x38(%rsp),%rbx
  lea    0x8(%rbx),%r8
  mov    0x40(%rsp),%rbx
  lea    0x8(%rbx),%r11
  mov    0x68(%rsp),%rbx
  lea    0x8(%rbx),%rbp
  mov    0x70(%rsp),%rbx
  add    $0x8,%rbx
  mov    0x58(%rsp),%rsi
  add    $0x8,%rsi
  mov    0x60(%rsp),%rcx
  lea    0x8(%rcx),%r10
  mov    0x48(%rsp),%rcx
  add    $0x8,%rcx
  mov    0x50(%rsp),%rdx
  lea    0x8(%rdx),%r9
  lea    -0x2(%rax),%eax
  mov    0x38(%rsp),%rdx
  lea    0x10(%rdx,%rax,8),%rax
  mov    %rax,-0x20(%rsp)
  mov    -0x2c(%rsp),%edx
  lea    -0x1(%rdx),%eax
  lea    0x4(,%rax,4),%r15
  movslq %edx,%rax
  lea    0x0(,%rax,4),%rdx
  mov    %rdx,-0x18(%rsp)
  mov    -0x28(%rsp),%edx
  lea    -0x1(%rdx),%r12d
  add    $0x1,%r12
  add    %r12,%rax
  lea    0x0(,%rax,4),%r13
  shl    $0x2,%r12
  lea    -0x1(%rdi),%eax
  shr    %eax
  lea    0x1(%rax),%r14d
  shl    $0x3,%r14
  jmp    L195
L134:
  pxor   %xmm3,%xmm3
  jmp    L160
L40:
  mov    %rax,%rdx
  add    (%r8),%rdx
  movss  (%rdx),%xmm4
  mov    (%r11),%rdi
  movss  (%rdi,%rax,1),%xmm0
  subss  %xmm4,%xmm0
  mulss  %xmm1,%xmm0
  addss  %xmm4,%xmm0
  movss  %xmm0,(%rdx)
  add    $0x4,%rax
  cmp    %r15,%rax
  jne    L40
L173:
  cmpl   $0x0,-0x28(%rsp)
  jle    L48
  mov    -0x18(%rsp),%rax
L171:
  mov    %rax,%rdx
  add    (%r8),%rdx
  movss  (%rdx),%xmm4
  mov    (%r11),%rdi
  movss  (%rdi,%rax,1),%xmm0
  subss  %xmm4,%xmm0
  mulss  %xmm1,%xmm0
  addss  %xmm4,%xmm0
  movss  %xmm0,(%rdx)
  add    $0x4,%rax
  cmp    %r13,%rax
  jne    L171
  mov    $0x0,%eax
L101:
  mov    %rax,%rdx
  add    0x0(%rbp),%rdx
  movss  (%rdx),%xmm4
  mov    (%rbx),%rdi
  movss  (%rdi,%rax,1),%xmm0
  subss  %xmm4,%xmm0
  mulss  %xmm1,%xmm0
  addss  %xmm4,%xmm0
  movss  %xmm0,(%rdx)
  add    $0x4,%rax
  cmp    %r12,%rax
  jne    L101
L48:
  cmpl   $0x0,-0x24(%rsp)
  jle    L77
  mov    $0x0,%eax
  mov    %r8,-0x38(%rsp)
L189:
  mov    %rax,%rdx
  add    (%rsi),%rdx
  mov    (%r10),%rdi
  movaps %xmm1,%xmm0
  mulss  (%rdi,%rax,1),%xmm0
  addss  (%rdx),%xmm0
  movss  %xmm0,(%rdx)
  lea    0x4(%rax),%rdx
  mov    %rdx,%rdi
  add    (%rsi),%rdi
  mov    (%r10),%r8
  movaps %xmm1,%xmm0
  mulss  0x4(%r8,%rax,1),%xmm0
  addss  (%rdi),%xmm0
  movss  %xmm0,(%rdi)
  mov    %rax,%rdi
  add    (%rcx),%rdi
  mov    (%r9),%r8
  movaps %xmm1,%xmm0
  mulss  (%r8,%rax,1),%xmm0
  addss  (%rdi),%xmm0
  movss  %xmm0,(%rdi)
  add    (%rcx),%rdx
  mov    (%r9),%rdi
  movaps %xmm1,%xmm0
  mulss  0x4(%rdi,%rax,1),%xmm0
  addss  (%rdx),%xmm0
  movss  %xmm0,(%rdx)
  mov    (%rsi),%rdi
  mov    (%rcx),%rdx
  movss  (%rdi,%rax,1),%xmm0
  mulss  (%rdx,%rax,1),%xmm0
  movss  0x4(%rdi,%rax,1),%xmm4
  mulss  0x4(%rdx,%rax,1),%xmm4
  addss  %xmm4,%xmm0
  addss  %xmm0,%xmm3
  add    $0x8,%rax
  cmp    %rax,%r14
  jne    L189
  mov    -0x38(%rsp),%r8
L77:
  add    $0x8,%r8
  add    $0x8,%r11
  add    $0x8,%rbp
  add    $0x8,%rbx
  add    $0x8,%rsi
  add    $0x8,%r10
  add    $0x8,%rcx
  add    $0x8,%r9
  cmp    -0x20(%rsp),%r8
  je     L94
L195:
  mov    $0x0,%eax
  cmpl   $0x0,-0x2c(%rsp)
  jg     L40
  jmp    L173
L94:
  mov    -0x28(%rsp),%ebx
  test   %ebx,%ebx
  jle    L140
  movslq -0x10(%rsp),%rdi
  shl    $0x3,%rdi
  mov    %rdi,%r8
  add    0x38(%rsp),%r8
  mov    %rdi,%r9
  add    0x40(%rsp),%r9
  movslq -0x2c(%rsp),%rdx
  lea    0x0(,%rdx,4),%rax
  mov    %ebx,%ecx
  add    %rcx,%rdx
  lea    0x0(,%rdx,4),%r10
L63:
  mov    %rax,%rdx
  add    (%r8),%rdx
  movss  (%rdx),%xmm4
  mov    (%r9),%rsi
  movss  (%rsi,%rax,1),%xmm0
  subss  %xmm4,%xmm0
  mulss  %xmm1,%xmm0
  addss  %xmm4,%xmm0
  movss  %xmm0,(%rdx)
  add    $0x4,%rax
  cmp    %rax,%r10
  jne    L63
  mov    %rdi,%rsi
  add    0x68(%rsp),%rsi
  add    0x70(%rsp),%rdi
  shl    $0x2,%rcx
  mov    $0x0,%eax
L10:
  mov    %rax,%rdx
  add    (%rsi),%rdx
  movss  (%rdx),%xmm4
  mov    (%rdi),%r8
  movss  (%r8,%rax,1),%xmm0
  subss  %xmm4,%xmm0
  mulss  %xmm1,%xmm0
  addss  %xmm4,%xmm0
  movss  %xmm0,(%rdx)
  add    $0x4,%rax
  cmp    %rax,%rcx
  jne    L10
L140:
  mov    -0x2c(%rsp),%eax
  lea    (%rax,%rax,1),%ecx
  mov    -0xc(%rsp),%ebx
  lea    (%rbx,%rbx,1),%esi
  cmp    %ebx,%eax
  jge    L208
  movslq -0x10(%rsp),%r10
  shl    $0x3,%r10
  mov    %r10,%rdi
  add    0x58(%rsp),%rdi
  mov    %r10,%r8
  add    0x60(%rsp),%r8
  mov    %r10,%r9
  add    0x48(%rsp),%r9
  add    0x50(%rsp),%r10
  movslq %ecx,%rax
  shl    $0x2,%rax
L166:
  mov    %rax,%rdx
  add    (%rdi),%rdx
  mov    (%r8),%r11
  movaps %xmm1,%xmm0
  mulss  (%r11,%rax,1),%xmm0
  addss  (%rdx),%xmm0
  movss  %xmm0,(%rdx)
  lea    0x4(%rax),%rdx
  mov    %rdx,%r11
  add    (%rdi),%r11
  mov    (%r8),%rbx
  movaps %xmm1,%xmm0
  mulss  0x4(%rbx,%rax,1),%xmm0
  addss  (%r11),%xmm0
  movss  %xmm0,(%r11)
  mov    %rax,%r11
  add    (%r9),%r11
  mov    (%r10),%rbx
  movaps %xmm1,%xmm0
  mulss  (%rbx,%rax,1),%xmm0
  addss  (%r11),%xmm0
  movss  %xmm0,(%r11)
  add    (%r9),%rdx
  mov    (%r10),%r11
  movaps %xmm1,%xmm0
  mulss  0x4(%r11,%rax,1),%xmm0
  addss  (%rdx),%xmm0
  movss  %xmm0,(%rdx)
  mov    (%rdi),%r11
  mov    (%r9),%rdx
  movss  (%r11,%rax,1),%xmm0
  mulss  (%rdx,%rax,1),%xmm0
  movss  0x4(%r11,%rax,1),%xmm4
  mulss  0x4(%rdx,%rax,1),%xmm4
  addss  %xmm4,%xmm0
  addss  %xmm0,%xmm3
  add    $0x2,%ecx
  add    $0x8,%rax
  cmp    %esi,%ecx
  jl     L166
L208:
  mulss  %xmm3,%xmm2
  mov    -0x8(%rsp),%rax
  movss  %xmm2,(%rax)
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void s_update_var_mpc(int nx, int nu, int N, int nb, int nbu, float *ptr_mu, float mu_scal, float alpha, float **ux, float **dux, float **t, float **dt, float **lam, float **dlam, float **pi, float **dpi) {
  int jj, ll;
  float mu = 0;
  for (ll = 0; ll < nu; ll++)
    ux[0][ll] += alpha * (dux[0][ll] - ux[0][ll]);
  for (ll = 0; ll < 2 * nbu; ll += 2) {
    lam[0][ll + 0] += alpha * dlam[0][ll + 0];
    lam[0][ll + 1] += alpha * dlam[0][ll + 1];
    t[0][ll + 0] += alpha * dt[0][ll + 0];
    t[0][ll + 1] += alpha * dt[0][ll + 1];
    mu += lam[0][ll + 0] * t[0][ll + 0] + lam[0][ll + 1] * t[0][ll + 1];
  }
  for (jj = 1; jj < N; jj++) {
    for (ll = 0; ll < nu; ll++)
      ux[jj][ll] += alpha * (dux[jj][ll] - ux[jj][ll]);
    for (ll = 0; ll < nx; ll++)
      ux[jj][nu + ll] += alpha * (dux[jj][nu + ll] - ux[jj][nu + ll]);
    for (ll = 0; ll < nx; ll++)
      pi[jj][ll] += alpha * (dpi[jj][ll] - pi[jj][ll]);
    for (ll = 0; ll < 2 * nb; ll += 2) {
      lam[jj][ll + 0] += alpha * dlam[jj][ll + 0];
      lam[jj][ll + 1] += alpha * dlam[jj][ll + 1];
      t[jj][ll + 0] += alpha * dt[jj][ll + 0];
      t[jj][ll + 1] += alpha * dt[jj][ll + 1];
      mu += lam[jj][ll + 0] * t[jj][ll + 0] + lam[jj][ll + 1] * t[jj][ll + 1];
    }
  }
  for (ll = 0; ll < nx; ll++)
    ux[N][nu + ll] += alpha * (dux[N][nu + ll] - ux[N][nu + ll]);
  for (ll = 0; ll < nx; ll++)
    pi[N][ll] += alpha * (dpi[N][ll] - pi[N][ll]);
  for (ll = 2 * nu; ll < 2 * nb; ll += 2) {
    lam[N][ll + 0] += alpha * dlam[N][ll + 0];
    lam[N][ll + 1] += alpha * dlam[N][ll + 1];
    t[N][ll + 0] += alpha * dt[N][ll + 0];
    t[N][ll + 1] += alpha * dt[N][ll + 1];
    mu += lam[N][ll + 0] * t[N][ll + 0] + lam[N][ll + 1] * t[N][ll + 1];
  }
  mu *= mu_scal;
  ptr_mu[0] = mu;
  return;
}
```