user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<update_only_a>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    %rdx,-0x28(%rbp)
  mov    %rcx,-0x30(%rbp)
  mov    %r8d,-0x34(%rbp)
  mov    %r9d,-0x38(%rbp)
  movl   $0x40,-0x8(%rbp)
  jmp    L43
L142:
  mov    -0x8(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x28(%rbp),%rax
  add    %rcx,%rax
  movss  (%rdx),%xmm0
  movss  %xmm0,(%rax)
L43:
  mov    -0x8(%rbp),%eax
  lea    -0x1(%rax),%edx
  mov    %edx,-0x8(%rbp)
  test   %eax,%eax
  jne    L142
  addq   $0x100,-0x18(%rbp)
  addq   $0x100,-0x20(%rbp)
  addq   $0x100,-0x28(%rbp)
  movl   $0x1,-0x4(%rbp)
  jmp    L88
L128:
  mov    -0x4(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  test   %eax,%eax
  jne    L101
  movl   $0x40,-0x8(%rbp)
  jmp    L63
L135:
  mov    -0x8(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x28(%rbp),%rax
  add    %rcx,%rax
  movss  (%rdx),%xmm0
  movss  %xmm0,(%rax)
L63:
  mov    -0x8(%rbp),%eax
  lea    -0x1(%rax),%edx
  mov    %edx,-0x8(%rbp)
  test   %eax,%eax
  jne    L135
  addq   $0x100,-0x18(%rbp)
  addq   $0x100,-0x20(%rbp)
L101:
  mov    -0x4(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  and    $0x1,%eax
  test   %eax,%eax
  je     L9
  movl   $0x40,-0x8(%rbp)
  jmp    L57
L96:
  mov    -0x8(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  pxor   %xmm0,%xmm0
  movss  %xmm0,(%rax)
L57:
  mov    -0x8(%rbp),%eax
  lea    -0x1(%rax),%edx
  mov    %edx,-0x8(%rbp)
  test   %eax,%eax
  jne    L96
  addq   $0x100,-0x20(%rbp)
L9:
  mov    -0x4(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  and    $0x2,%eax
  test   %eax,%eax
  je     L55
  movl   $0x40,-0x8(%rbp)
  jmp    L116
L97:
  mov    -0x8(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x28(%rbp),%rax
  add    %rcx,%rax
  movss  (%rdx),%xmm0
  movss  %xmm0,(%rax)
L116:
  mov    -0x8(%rbp),%eax
  lea    -0x1(%rax),%edx
  mov    %edx,-0x8(%rbp)
  test   %eax,%eax
  jne    L97
  addq   $0x100,-0x18(%rbp)
L55:
  addq   $0x100,-0x28(%rbp)
  addl   $0x1,-0x4(%rbp)
L88:
  mov    -0x4(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cmp    $0x3,%eax
  jne    L128
  movl   $0x40,-0x8(%rbp)
  jmp    L51
L73:
  mov    -0x8(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x28(%rbp),%rax
  add    %rcx,%rax
  movss  (%rdx),%xmm0
  movss  %xmm0,(%rax)
L51:
  mov    -0x8(%rbp),%eax
  lea    -0x1(%rax),%edx
  mov    %edx,-0x8(%rbp)
  test   %eax,%eax
  jne    L73
  mov    -0x30(%rbp),%rax
  mov    (%rax),%eax
  add    $0x1,%eax
  shl    $0x6,%eax
  cltq
  shl    $0x2,%rax
  neg    %rax
  add    %rax,-0x28(%rbp)
  mov    -0x28(%rbp),%rax
  pop    %rbp
  ret
```

assistant: ```c
float *update_only_a(const float *profa, const float *profb, float *newp, int *path, int sipa, int sipb) {
  int i, c;
  for (i = 64; i--;) {
    newp[i] = profa[i];
  }
  profa += 64;
  profb += 64;
  newp += 64;
  c = 1;
  while (path[c] != 3) {
    if (!path[c]) {
      for (i = 64; i--;) {
        newp[i] = profa[i];
      }
      profa += 64;
      profb += 64;
    }
    if (path[c] & 1) {
      for (i = 64; i--;) {
        newp[i] = 0.0;
      }
      profb += 64;
    }
    if (path[c] & 2) {
      for (i = 64; i--;) {
        newp[i] = profa[i];
      }
      profa += 64;
    }
    newp += 64;
    c++;
  }
  for (i = 64; i--;) {
    newp[i] = profa[i];
  }
  newp -= (path[0] + 1) * 64;
  return newp;
}
```