user: 下面的汇编指令对应的C源代码是什么：

```asm
<sieveBuildBig>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x50,%rsp
  mov    %rdi,-0x1038(%rbp)
  mov    %esi,-0x103c(%rbp)
  mov    %rdx,-0x1048(%rbp)
  mov    %rcx,-0x1050(%rbp)
  mov    %r8d,-0x1040(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    -0x1038(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <assert@plt>
  mov    -0x1050(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <bnLSWord@plt>
  and    $0x1,%eax
  test   %eax,%eax
  je     L50
  mov    -0x1048(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <bnLSWord@plt>
  and    $0x1,%eax
  mov    %eax,-0x101c(%rbp)
  mov    -0x103c(%rbp),%edx
  mov    -0x101c(%rbp),%eax
  mov    $0xaa,%esi
  mov    %eax,%ecx
  sar    %cl,%esi
  mov    %esi,%ecx
  mov    -0x1038(%rbp),%rax
  mov    %ecx,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  jmp    L124
L50:
  mov    -0x103c(%rbp),%edx
  mov    -0x1038(%rbp),%rax
  mov    $0xff,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  mov    -0x1048(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <bnLSWord@plt>
  and    $0x1,%eax
  mov    %eax,%edi
  mov    $0x0,%eax
  call   <assert@plt>
L124:
  lea    -0x1010(%rbp),%rax
  mov    $0x1000,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <sieveSmall@plt>
  movzbl -0x1010(%rbp),%eax
  movzbl %al,%eax
  and    $0x1,%eax
  test   %eax,%eax
  jne    L34
  lea    -0x1010(%rbp),%rax
  mov    $0x0,%edx
  mov    $0x1000,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <sieveSearch@plt>
  jmp    L113
L34:
  mov    $0x0,%eax
L113:
  mov    %eax,-0x1024(%rbp)
L59:
  mov    -0x1024(%rbp),%eax
  add    %eax,%eax
  add    $0x1,%eax
  mov    %eax,-0x1014(%rbp)
  mov    -0x1014(%rbp),%edx
  mov    -0x1050(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <bnModQ@plt>
  mov    %eax,-0x1018(%rbp)
  cmpl   $0x0,-0x1018(%rbp)
  jne    L121
  mov    -0x1014(%rbp),%edx
  mov    -0x1048(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <bnModQ@plt>
  test   %eax,%eax
  setne  %al
  movzbl %al,%eax
  mov    %eax,%edi
  mov    $0x0,%eax
  call   <assert@plt>
  jmp    L41
L121:
  mov    -0x1014(%rbp),%edx
  mov    -0x1050(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <bnModQ@plt>
  mov    %eax,%edx
  mov    -0x1014(%rbp),%eax
  mov    %eax,%esi
  mov    %edx,%edi
  mov    $0x0,%eax
  call   <sieveModInvert@plt>
  mov    %eax,-0x1018(%rbp)
  mov    -0x1018(%rbp),%eax
  mov    %eax,%edi
  mov    $0x0,%eax
  call   <assert@plt>
  mov    -0x1014(%rbp),%eax
  sub    -0x1018(%rbp),%eax
  mov    %eax,-0x1018(%rbp)
  mov    -0x1014(%rbp),%edx
  mov    -0x1048(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <bnModQ@plt>
  mov    %eax,-0x101c(%rbp)
  mov    -0x101c(%rbp),%edx
  mov    -0x1018(%rbp),%eax
  imul   %rdx,%rax
  mov    -0x1014(%rbp),%ecx
  mov    $0x0,%edx
  div    %rcx
  mov    %rdx,%rax
  mov    %eax,-0x101c(%rbp)
  mov    -0x1014(%rbp),%ecx
  mov    -0x101c(%rbp),%edx
  mov    -0x103c(%rbp),%esi
  mov    -0x1038(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <sieveSingle@plt>
  movl   $0x0,-0x1020(%rbp)
  jmp    L134
L5:
  mov    -0x1018(%rbp),%eax
  and    $0x1,%eax
  test   %eax,%eax
  je     L138
  mov    -0x1014(%rbp),%eax
  shr    %eax
  mov    %eax,%edx
  mov    -0x1018(%rbp),%eax
  shr    %eax
  add    %edx,%eax
  add    $0x1,%eax
  jmp    L83
L138:
  mov    -0x1018(%rbp),%eax
  shr    %eax
L83:
  mov    %eax,-0x1018(%rbp)
  mov    -0x1018(%rbp),%eax
  add    %eax,-0x101c(%rbp)
  mov    -0x101c(%rbp),%eax
  cmp    -0x1014(%rbp),%eax
  jae    L73
  mov    -0x101c(%rbp),%eax
  cmp    -0x1018(%rbp),%eax
  jae    L99
L73:
  mov    -0x1014(%rbp),%eax
  sub    %eax,-0x101c(%rbp)
L99:
  mov    -0x1014(%rbp),%ecx
  mov    -0x101c(%rbp),%edx
  mov    -0x103c(%rbp),%esi
  mov    -0x1038(%rbp),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <sieveSingle@plt>
  addl   $0x1,-0x1020(%rbp)
L134:
  mov    -0x1020(%rbp),%eax
  cmp    -0x1040(%rbp),%eax
  jb     L5
L41:
  mov    -0x1024(%rbp),%edx
  lea    -0x1010(%rbp),%rax
  mov    $0x1000,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <sieveSearch@plt>
  mov    %eax,-0x1024(%rbp)
  cmpl   $0x0,-0x1024(%rbp)
  jne    L59
  mov    $0x0,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L96
  call   <__stack_chk_fail@plt>
L96:
  leave
  ret
```

assistant: ```c
int sieveBuildBig(unsigned char *array, unsigned size, struct BigNum const *bn, struct BigNum const *step, unsigned dbl) {
  unsigned i, j;
  unsigned p;
  unsigned s;
  unsigned t;
  unsigned char small[(65536 / 16)];
  assert(array);
  if (bnLSWord(step) & 1) {
    s = bnLSWord(bn) & 1;
    memset(array, 0xAA >> s, size);
  } else {
    memset(array, 255, size);
    assert(bnLSWord(bn) & 1);
  }
  sieveSmall(small, (65536 / 16));
  i = (small[0] & 1) ? 0 : sieveSearch(small, (65536 / 16), 0);
  do {
    p = 2 * i + 1;
    t = bnModQ(step, p);
    if (!t) {
      assert(bnModQ(bn, p) != 0);
      continue;
    }
    t = sieveModInvert(bnModQ(step, p), p);
    assert(t);
    t = p - t;
    s = bnModQ(bn, p);
    s = (unsigned)(((unsigned long)s * t) % p);
    sieveSingle(array, size, s, p);
    for (j = 0; j < dbl; j++) {
      t = (t & 1) ? p / 2 + t / 2 + 1 : t / 2;
      s += t;
      if (s >= p || s < t)
        s -= p;
      sieveSingle(array, size, s, p);
    }
  } while ((i = sieveSearch(small, (65536 / 16), i)) != 0);
  return 0;
}
```